GEOLOGICAL SURVEY OF INDIA [ OP. RAJASTHAN (WR)]
During the FS 2004-2005, 24 items including 4 of STIM, 2 on National Geo-chemical
mapping (NGM), 15 on mineral investigation, 1 for search for rare metal and 2 geoenvironmental appraisal items were taken up. During the period under review a total of
876sq.km.of STM, 2180 sq.km.of NGM, 26.1sq.km. LSM, 3.295sq.km.detailed
mapping, 80sq.km. of reconnaissance. mapping and 7548.89 in. of drilling was carried
out. A brief account of the highlights of the work done is given below:
(i) Specialized Thematic mapping (STM) Project:
Three new items of STM were taken up while one was in continuation of the last
F.S. All the items fulfilled their respective thematic objectives.
The STM work in Sandmata Complex (Nasirabad-Masuda sector, 45 K/5): STM
1:25,000 scale which was continued from FS 2003-04 has revealed the existence of high
grade inetasediments of the Bhilwara Supergroup (BSG) forming the county rock. High
grade metasediments of the BSG are intruded by porphyritic (gneissic) granite and
gabbroid/noritic rocks, amphibolite, quartz-feldspathic (aplitic to pegmatoid) and quartz
veins. A part from this, a narrow linear discontinuous patch for cyclic volcanosedimentary sequence is seen around Kelu village and also a sedimentary sequence from
Hanotiya to Akarsada within the BSG. Around Hanotiya, old workings and slag
materials are seen, supposed to be indicator of mining in the past where copper deposit
has been established by AMSE Wing, Jaipur in the seventies, but for a limited strike
length (400 in. x 10-20 in.). Evidence of surfacial mineralisation is recorded in dump
material along old workings in the form of malachite staining over gritty to pebbly
quartz arenite of the sedimentary sequence. Near to it around dhanikhera, mineralisation
of chalcopyrite is seen in dug well dumps as segregations along fractures/shears.
The STM of Delhi Supergroup in Nim Ka Thana-Raipur-Patan area Sikar district (parts
of toposheets No. 45 M/I3, 14 and 54 A/1, 2) has revealed the incidences of very good
copper mineralisation as grains of bornite and malachite stains in the Baleshwar-DokanPatan area. Bornite grains are exposed at the surface as veins and disseminations in
calcareous-biotite-schist/impure marble rock. Grains of chalcopyrite, covellite and pyrite
as disseminations with malachite stains are also noted int he area as in NNE of Nimod,
north of Baleshwar, north of Kalyanpura. in Mahawa area very good malachite stains are
noted with specks of bornite in Ajabgarh. quartzite and schists. Pyrrhotite type, whitish
yellow coloured sulphide is noted in Alwar massive quartzite at one place north of
Bhopiya on the ridge top Gossan of deep red to reddish brown colour is noted in the area
north of Baleshwar, exposed for a length of nearly 100 m. and width varying from 20 m.
to 30 m. Old working is noted at the contact of Alwar quartzite and Ajabgarh schist, on
the eastern slope of Alwar quartzite ridge, SE of Baleshwar. Old working is also noted at
the contact of Alwar ferruginous brecciated quartzite and Ajabgarh schists SW of
Kalyanpura with good malachite stains. Ferruginous brecciated quartzite in
Parusotampura-Kalyanpura section is gossanised at many places. One prominent iron
rich rock unit is noted nearly 4 km. SSW of Raipur, which is 10-25 m. wide and seems
like magnetite body where as at other places it is amphibole-schist rock, rich in iron.
An area of 260 sq.km was mapped on1:25,000 scale under the project specialised
thematic mapping in parts of topsheet No. 45 H/9 between Lat. 24°45' & 24°55' and
Long. 73°30' & 73º45'. The study area covers an area of entire length of Aravalli Fold
Belt including sections of the BGC (basement) in the east and Delhi fold belt in west.
Malachite stains were recorded in a zone (250 m. x 10 m.) along the BGC-ASG contact
near Zhala Estate south of Kesuli. Ferruginised/gossanised zone is recorded along the
contact. The STM carried out in between Toda-Raisingh and Rajmahal areas in parts of
the T.S. No. 45 N/8 & 12,45 0/5 & 9 within latitude 25°53' - 26°04' and longitude 75°20'
-, 75°35' is composed mainly of 'pelitic metasediments (migmatised to various degress),
substantial arenaceous metasediments and minor carbonate sediments. The rocks of the
area mapped belong to the Kekri and Rajmahal formations of the Mangalwar complex
(GSl meinoir-123). The Kekri formation comprises of garnetiferous biotite schist
(veined gneiss), banded gneiss (stromatic), biotite gneiss (streaky), thin bands of
calcsilicate rocks and biotite schist interbanded with calc-silicate, amphibolite and grey
quartzite. These above gneisses (miginatites) are the effect. of various degrees of
miginatitsation. The Rajmahal Formation comprises micaceous quartzite (feldspathic at
places pebbly), coarse-grained quartzite (gritty in nature), massive quartzite and
ferruginous quartzite and thin band of conglomerate (seen at one place in between
micaceous quartzite and massive quartzite-W of Rampura).The field relation of the
migmatised metasedilments of the Kekri formation and the arenaceous metasedments of
the Rajmahal Formation are at many places lithologically gradational. Numerous
tectonic signatures are also noticed near the contact of Kekri and Rajmahal formations.
Occurrences of semiprecious minerals like beryl, garnet have been noticed in the area.
The transparent variety 0 light green colour of beryl is mined near Rampura, Bagri,
exclusively from the pegmatite vein. The pegmatite vein also contains topaz
(transparent), quartz, feldspar, tourmaline (black). The semiprecious variety of garnet is
mined near Rajmahal from garnetiferous biotite schist where the intrusion of at
amphibolite has taken place, giving rise to big size of the garnet crystals (8 cm. dia). The
garnet is highly fractured. About 20 open shallow pits are seen for mining of beryl
where as 3-4 abandoned garnet mines (30 m.-40 m. deep) are seen. Besides, at a number
of places malachite stains and chalcopyrite have also been seen. Ferruginous zones (3 m.
wide and 40 m. long, at two places) near Bisalpur along the shear zone are noticed in
quartzite of the. Rajamahal formation.
.
(ii) Geo-chemical Mapping:
Geochemical mapping in T.S. No. 54 A/5 & 6 has revealed that nearly 60% of the area
is covered by alluvium, and in the remaining area rocks belonging to the Alwar Group
and Ajabgarh Group of Delhi Supergroup are exposed. The intrusives in the area include
granite and basic rocks. Old workings are found in Baraud (T.S. No. 54 A/5 & 6) and in
.Rampur area (T.S. No. 54 A/5 & 6). Granites are exposed near Harsora. It comprises
two varieties of granite, grey and pink. The pink variety appears to be younger. Both
varieties give mild detection of radioactivity on the scintillometer. The grey variety
shows less than 0.03 m. R/hr while the pink variety shows upto 0.06 m. R/hr total count.
The fresh surface of the pink variety shows the maximum value.
GCM in TS K/4 & K/7 has revealed that most of the area exposes the banded gneissic
complex with limited metasedimentary patches. The exposure density is low and
generally deposits low relief. Most of the sampling has been done from "0" order
Streams.
(iii) Mineral Investigation:
The basemetal investigations in El category included two drilling programme for leadzinc mineralisation in Dariba-Bethumbi Surawas belt, one in Bhupal Sagar belt, one in
Dokan-Kundla Ki Dhani block, one in Central Khetri belt and two in south Khetri belt.
P1 & P2 category included items each for the basemetal investigation.
IN Malikhera block exploration by drilling commenced during the field season 2004-05.
The borehole MBH-l was planned to trace the continuity of Pb-Zn mineralisation
intersected in Rajpura "C" block and to test the geochemical anomaly (in ferruginous
chert breccia) at depth. The borehole commenced on 27.9.2004 and has progressed upto
456.40 m. It has intersected carbonaceous mica schist, ferruginous chert, dolomitic
marble and calc silicate marble. Specks & dissimiations of pyrite are present.
I
Geochemical survey was taken up in Gadariyawas- Laugach area in the Hindoli Group
of rocks with the aim to delineate potential mineralised zones of basemtals. A 10 m. to
100 m. wide ferruginous chert breccia zone showing enrichment in basemetals is
demarcated on 1:10,000 scale for 5 km. strike length within quartz-chlorite-schist and
quartz-sericite schist horizon. This zone trends in N 40° E-S40° W direction for the
major part and takes in N-S swing in the southern part near Nimbahera. A one thin
(10m. wide) ferruginous marble band has also noticed interinittently100-150 m. west of
the above-mineralised zone. Soil sampling on 100 m x 250 m. grid and spot bed rock
sampling of the potential mineralised zone have been carried out. Analytical results of
15 spot bedrock samples collected from the entire mapped area indicate high (upto
0.12%) Cu and Zn along with moderate (0.06%) amount of Pb and Ni. An area of 10.00
sq.km. area was mapped on 1: 10,000 scale in the above potential zone.
The Jitawas west block occurs just north of Sindesar Kalan West block. The
investigation in the block was taken up to prove the northern continuation of the Pb Zn
investigation of Sindesar Kalan West block. A few 5-6 channel AEM anomalies are also
located over the completely soil-covered area. Borehole JBH-l commenced on 6.9.04
and drilled upto a depth of 541.20m.It has intersected quartzite/metachert, biotite/sericite
schist carbonaceous schist and dark dolomatic marble. The borehole has intersected
several zones of sphalerite mineralisation of which the zone intersected between 501.50503.50 in. (2.00 m.) with 2% Pb-Zn (VE) is important. The borehole was closed on
25.1.05. borehole JBH-2 commenced on 8.11.04 and progressed upto a depth of 544.95
in. It has intersected quartzite, calcareous schist and metaminarl, biotite schist,
carbonaceous schist, carbonaceous amphibole rock, calc silicate marble and dolomite.
The borehole intersected rich pyrrhotite (10-15%) in carbonaceous schist between
135.90 m. - 150.65 m. depth and fine disseminations of sphalerite between 252.60268.10 m. in carbonaceous amphibole rock. The borehole is in progress. The borehole
JBH.-3 commenced on 28.2.05 and has drilled a depth of 76.60 in. and has intersected
calcareous schist and metaminarl, biotite/sericite schist with poor disseminations of
pyrite and pyrrhotite. The borehole is in progress.
In the 50 km. long Pur-Banera metasedimentary belt, a number of lead-zinc and copper
prospects have been investigated. However, the area between Pur-Dariba and RupparaSalampura on the western limb has remained unexplored. During the current FS this
area was taken up to evaluate the basemetal mineralisation. The rock types found in the
area are quartzite, dolomite/marble, cac-silicate, garnet-mica schist, banded magnetite
quartzite, and mica schist of Pur-Banera Group of Bhilwara Supergroup. The copper and
Pb-Zn mineralisation is associated with the calcareous schist and banded magnetite
quartzite. Soil sampling on 50 m. X 200m. grid and spot bed' rock samples were
collected from the area. the analytical results of 39 soil samples show Cu, Zn and Pb
upto 510 ppm, 1100 ppm and1.31%, respectively.
In Tikwara-Bir area, during the period, mapping on 1:10000 scale was carried out
covering 5.50 Sq.km. with collection of 27 Nos. of petrological samples and 308 Nos. of
soil samples on 100 m x200m. grid in Silora and Mohanpura areas. Rock types exposed
in both the areas are biotite schist and gneisses, miginatite, pegmatite, pegmatite and
quartz veins of Bhilwara Supergroup (BGC). Strike of foliation is N30° E with 60° NW
dip. The indications of mineraIisation are in the from of primary sulphides and
malachite stains in the dumps of the dug wells. The analytical results of soil samples are
awaited.
The drilling investigation in the Gangas block was continued during the period since the
last field season. During the period the borehole GAS-3 progressed from 149.40m. to
213.50 m. It has intersected sericite-chlorite/amphibole schist with disseminations of
pyrite, chalcopyrite and pyrrholite along fracture planes. A 2.00 m. thick Cu rich zone
was intersected from 38.45-40.45m.having 0.76% Cu.
,,
The borehole GAS-4 progressed up to 245.10 m. It has intersected hornblende rock,
hornblende-chlorite-sericite-schist and the borehole was closed at 245.10 m. depth. It
has intersected following zone of Cu mineralisation:
I. 144.00 m - 146.00 m. =2.00 with 0.5% Cu (V E) and
II 152 .00m. - 157.00 m. = 5.00 with 0.5% Cu (VE)
The borehole GAS-5was drilled upto 241.70 in. intersecting chlorite-sericite-schist and
quartz-amphiboilite. Most of these lithounits are fractured, brecciated and silicified.
following mienralised zone have been encountered.
I.
II
III
88.200m. - 92.70m. = 4.50 with 2% Cu (VE)
106.35m - 109.85m. = 3.50 with 0.5% Cu (VE) and
124.05m - 126.05m. = 2.00 with 0.5% Cu (VE)
A total of 0.30 sq.km. area was mapped on 1:2,000 scale in the southwestern side of the
block where surface indications of sulphide mineralisation are present.
Test drilling was taken up in Chhatrikhera block where geophysical anomalies are
located. The borehole CBH-l was drilled upto 217.00 in. depth. The borehole CBH-l
has intersected quartz-biotite schist, garnetiferous andalusite-biotite schist and chlorite
schist intruded by quartz-vein with thin ferruginous chlorite schist bands are present.
Streaks and encrustation of fresh chalcopyrite and pyrite in negligible quantity are
observed mainly at 107 m., 142 m. and 154 m.
Sindesar Khurd Extension block forms a part of Dariba-Bethumbi-Surawas belt.
Exploration by drilling in this block was commenced during the field season 2000-01.
The borehole SKE-I0 was planned to trace the southern strike continuity of lead-zinc
mineralisation intersected in SKE-2. The borehole SKE-I0 progressed from 282.25 m. to
533.40 m. (251.05 m.). It has intersected cherty quartzite, gan1etiferous mica schist, and
carbonaceous-calcareous mica schist. Disseminations and veins of pyrrhotite and
sphalerite are present from 505.20 mm. to 523.40 m. (182.20 m.) with 1-2% Zn (VE and
from 523.40 m. to 533.40 m. =.10.00 m. with 2-3% Zn (VE). The borehole is in
progress. The progress in drilling was extremely slow due to cherty quartzite.
In Dokan block, the entire four borehole (3 completed one in progress) intersected
calcareous-quartz biotite schist, siliceous ca1c-silicate marble, banded dolomite and
quartz.-chlorite-tremolite-biotite schist with or without garnet. Poor disseminations of
pyrite appear to be a universal phenomenon as it occurs in all the boreholes irrespective
of lithology. However significant zones of Cu mineralisation in forms of bornite,
chalcocite, covlite and chalcopyrite intersected in the boreholes, range in borehole width
of 9.00 m. to 40 .00m. with 0.1 % to 1 % Cu (visual estimate).
In Kundla Ki Dhani block, between the depth of 190.30 m. to 322.50 m., disseminations
and segregations along quartz-calcite veins of bornite & chalcopyrite. were intersected
at various levels in the borehole KDH-l. Drilling is in progress in both the blocks.
In Bageshwar area (27°46'23", 75°54'15, TS 45 M/I3), which is located NW of
Baniwala Ki Dhani block, district Sikar rocks of Alwar Supergroup of Delhi Supergroup
are exposed. Drilling the current FS 2004-05 detailed geological mapping (1:2,000) and
grid sampling, at 100 m. X 50 m. grid are continuing to ascertain the continuity of
copper mineralisation of Baniwala ki Dhani area. Malachite stains, specks of bornite and
associated djurleite (Cu31S6) and anilite (Cu3IS6) (identified by XRD) are present at
places within biotite schist in contact with impure marble. besides these Cu minerals,
specularite is also present at places. Both soil and rock samples are collected at 100m. X
50 m. grid for covering a target area of 1.2 sq.km.
In Raisar area DM was carried out in NE of Dantali Dam block in 600 m. X 200 m.
(0.12 sq.km.) around the old working zone. The area mapped comprises micaceous
quartzite (at places ferruginised) having 240 m. length, 20 to 25 m. width and metabasic
flows (amphibolites) of Tehla formation of Raialo Group of rocks. The old working lies
in the ferruginised; gossanised part of the sheared micaceous quartzite. The general
trend of the formation is N 20° to 30° E with sub-vertical dips. Four sets of S planes
were observed. The gossan zone, east of Raisar, is developed at the contact between
metabasic flows of Tehla formation and quartzite of Pratapgarh formation of Alwar
Group. The length of the gossan is about 1500 m. with average width 30-40. m. The
lithology of Matasula block comprises Ajabgarh and Alwar Groups. of rocks, the
contact between the two is sheared and faulted which is evidenced by the presence of
fault breccia/brecciated quartzite. The work is in progress.
In Adwana Jahaz block the borehole AJ-2 was drilled from 93.55 in. to 302.65 in. and
was closed at 302.65 m. It has intersected lean Cu mineraIisation below the gossan zone
between depths of 73.60 and 97.30 m. Unexpected Cu+Au mineralisation was
encountered from 210.20 m. depth beneath the village of Manaksas. Four zones of lean
copper mineralisation are (i) 214.70 to 217.75 m. (3.05 m.) x 0.22% Cu & 168 ppb Au,
(ii) 238.80 to 246.80 m. (7.95 m.) x 0.28% Cu (iii) 264.90 to 270.10 m. (5.20 m.) x
0.27% Cu and (iv) 286.35 to 302.65 m. (16.30 m.) 0.2 to 0.3% Cu. VE. The sub-zones
(i), (ii) & (iii) are part of the mineralised zone of 47.55 in. width (238.80 to 286.80 m.),
the complete assay results of which are still awaited. The borehole AJ-3 progressed from
92.20 m. to 364.80 m. It has intersected lean Cu mineralisation below the gossan.
InHalowala Johra area metasolnatic synkinematic granite rock occupies the core of the
antiformal structure. The lithounits delineated by detailed mapping include augen
gneiss, leucogranite, an1phibolite, phyllite, quartz sericite schist and veins of quartz and
quartzo-felspathic material. The general strike of the formation is NE-SW with steep
dips and a transverse shear zone cuts accross the area for a traceable length of 1200 m.
This shear zone is occupied occasionally by myloinitised quartzo-felspathic rock and
amphibolite. Several low to moderate geochemical anomalies for Cu, Co and Au have
been demarcated falling in an en-echelon pattern over the shear zone. Borehole HJ-l
drilled to a depth of 232.80 m. interseted augen gneisses, amphibolite, and kaolinised
quartzo-felspathic rock and silicified leucogranite. Lean Cu and Au contents occur in
five zones between the depth range of 103.65 m. to 156.50 m. for widths of 0.95 m. to
5.50 m. Cu content varies from 0.23% to 0.32% and Au content varies from 75 ppb to
240 ppb. Borehole HJ-2 has been drilled upto a depth of 262.50 m. This borehole has
intersected augen gneisses, occasionally mylonitised quartzofespathic rock and
leucogranite. Pyrite, pyrrohotite and chalcopyrite occur as specks within the granite
from depth of 136.60 m. onwards.
In Dungarwali Dhani block, south Khetri copper belt, Sikar district. The lithounits
delineated in the area are augen gneiss, leucogranite, amphibolite, quartz-mica schistquartz-biotite/amphibole gneiss, quartzo-felspathic veins and quartz veins. Augen gneiss
is the predolninant1y occurring lithounit of the block and is intruded by leucogranite,
quartzo- felspathic veins and quartz veins. Caught up patches of leucogranite were
noticed within amphibolites. Amphibolites occur as extensive independent bodies
varying in width from 50 m. to 200 m. and continue northeasterly for a strike length of 4
km. Amphibolites also occur as thin intrusive bodies ( 2 m. x 2 m.) within augen gneiss.
In Dungarwali Dhani block sulfide mineralisation occurs at the contact of augen gneiss
and amphibolite as seen in the well dumps.
In Muradpur the borehole MRP-4 progressed from 726.55 m. to 744.50 m. and was
.closed at 744.50 m. It has intersected the footwall rocks of Ajabgarh Group in the form
of amphibole, quartzite in the drilled depth. Borehole MRP-5 was drilled to a depth of
575.80 m., it has intersected felspathic quartzite upto 339.70 m. quartzbiotite schist with
kyanite-silimanite-biotite schist intercalations from 339.70 m.to 540.10 m.. and
amphibole quartzite from 540.10 m. to 575.80 m. It is yet to reach expected depth of
mineralisation.
(iv) Gold Exploration:
In Khankriya Gara block, Banswara district an area of 0.14 sq.km. (1:1,000) has been
covered during present FS under detailed geological mapping. Rock types mapped in the
area are keratophyre, interbanded amphibole marble keratophyre, dolomitic marble,
garnetiferous biotite schist, quartzite and amphibolite of Aravalli Supergroup. Three
phases of deformation (AFl to AF3) are discernible in the area. folds of Fl and F2 phase
are coaxial where as the folds of F3 are almost perpendicular and form broad warps.
Mineralisation is noticed in the form of gossan patches in association with interbanded
keralphyre and amphibole. marble. Groove samples collected from gossan zones
indicated 1.00 m. to 4.00 m. thick gold zones with 0.57 ppm to 0.89 ppm average gold
content. During FS 2004-05 drilling was carried out in borehole KG-4 to KG-9.All the
boreholes intersected sulphide mineralisation as anticipated. Width of the sulphide zones
varies from 1.00 m. to 12.50 m. with visual estimate of sulphides ranging from 5 to
40%. Pyrrhotite is the main sulphide mineral with subord amounts of arsenopyrite and
chalcopyrite. A total of 343 Nos. of core samples have been collected from these
sulphide zones. Results are awaited. During reconnoitory traverses in Gundelapara block
(west of Bhukia village), four parallel to sub-parallel gossan zones (750m. to 1.00 km.
strike length and 5.00 m. to 35.00 m. in width) have been noticed. A total of 34 Nos. of
spot simples collected from these gossan zones indicated copper values ranging from
0.10% to 0.94%, lead from 61 to 92 ppm zinc from 16 to 54 ppm nickel from 36 to 915
ppm and cobalt from 48 to 670 ppm. Analytical results for gold are awaited.
An area of 0.3-8 km has been mapped (1:2,000) during the present FS under detailed
geological mapping in Pathara block, Banswara district, Rajasthan till the end of March
2005. Rock types mapped int he Pathara-1 is chlorite-mica-quartz schist/phyllite and
massive dolomitic marble and also locally thinly bedded dolomitic marble of the
Delwara Group of the Aravalli Supergroup. A silicified zone with a few small old
workings, which is approximately 125 m. wide is marked on the dolomitic
marble. There are a few' more small old workings present in the northeastern part of
the mapped area in the dolomitic marble unit. Beside these old workings, a few small
gossan lenses. are also present. A total of 72 GCS on 50 x 100 m. grid, 8 gossan sim1es
and 207 channel simples are collected. out of 207 Nos. of channel samples 143 nos. of
samples are from 6 channel at 100 m. interval across the silicified zone by keeping
sample length of 5 m. and 64 nos. of samples are from 2 channels across the old working
by keeping sample length of 1 m. Analytical results are awaited.
In Delwara an area of 0.275 sq.km. has been covered by detailed mapping (1:2,000).
The rocks exposed in the area are dolomitic marble, keratophyre, amphibole bearing
quartzite and amphibolite of Delwara Group of the Aravalli supergroup. Pegmatite and
quartz veins are the main intrusive. The lithoasselnblage generally trends in N-S to N
25° W -S 25°E dipping 500 to 850 west and forms a major synformal closure that
plunges 43° in S 40° E. The phases of deformation (AF1 to AF3) are discernible in the
area. . Folds of F1 and F2 phase are coaxial where as the folds of F3 are almost
perpendicular and forms broad warps. The folds of F2 and F3 phase have given rise to
the major outcrop pattern in the area under study. Five number of sub-parallel
mineralised zones manifested by the presence of oxidization, gossanisation, brecciation,
old workings and malachite staining have been marked from east to west in the area.
These zones generally trend in N 10°-25° W to SI 0° -25°E and are developed either
over keratophyre or on the contact of dolomitic marble and keratophyre. A total of 277
GCS on 25 x 50 m. grid and 68 channel simples are collected. All the channel simples
are collected from the probable zone of mineralisation keeping the simple width from 1
m. to 3 m. depending on the width of the mineralisation zone. 14 number of samples for
petrological studies and 14 number of samples for XRF analysis are also collected.
analytical results are awaited.
(v) Industrial and Fertilizer Minerals:
A total of 80 sq.km. area was covered by reconnoitory survey on I: 50,000 scale in parts
of Dewa Ka Bera, Kaldari and Barabera area and 5.1 sq.km. area was covered on 1:
10,000 scale in Sibagaon and Barabera areas. 184 nos. BRS and 15 samples for o KRD
were collected and 2 cu.m. pitting and trenching were also done to expose the pegmatite
body. The pegmatite veins exposed SW of Sibagaon and in Barabera area within calcsilicate rock and phyllite are generally homogenous in nature. The trend of pegmatite
varies from N70º-80º W-S70º-8°E to N30º W-S30ºE with sub vertical dips in Sibagaon
area, whereas it varies from NW-SE to NE-SW in Barabera area. The strike extension of
these veins ranges from 5 m. to 100 m. and in width from 0.2 m. to 7 m. the pegmatite
contains lepidolite, fluorite and tourmaline, the feldspar occurring in pegmatite varies
from plagioclase to K-feldspar. The pegmatite is medium to coarse grained in nature.
The pegmatite forms sharp contact and shows cross cutting relationship with the country
rock. . Analytical results of 28 simples received so far have indicated Zn 58 to 590 ppm,
Rb 370 to 520 ppm. Cs <20 ppm, Sr 22 to 170 ppm, Y 25 ppm, Zr 94 ppm, Nb 26 to 35
ppm, (La..Lu) 300 ppm.
(vi) Environmental Geology Division:
An area of 300 sq.km.. -around Pali town was covered for the preparation of
geomorphological, drainage, landuse, geoenvironmental appraisal maps on1:25,000
scale. For impact analysis of dyeing industries of Pali on soil and ground water, samples
were collected from different areas around Pali town for qualitative assessment of
ground water and soil between the polluted and unpolluted areas. Water samples were
collected from effluent treatment plant (both the untreated industrial liquid effluent and
the treated liquid effluent) for ascertaining the content of harmful constituents through
analysis and also to know the efficiency of treatment plant. Both contaminated and
uncontaminated dug well water sample were collected. Soil samples were collected from
the agriculture fields being irrigated by contaminated dug well water. Data on fluoride
content in dug well water of Pali district were also collected from the PHED, Pali, Raw
industrial waste water samples, treated waste water samples from effluent treatment
plants, contaminated dug well water samples, soil and crop simples of the agriculture
field being irrigated by contaminated dug well water were taken for laboratory analysis.
For determining the sources of fluoride contamination in ground water of Pali area, rock
simples were collected from the areas adjoining Pali town. Simples (4 Nos.) of untreated
and treated industrial effluent water were collected for BOD, COD analysis.
For creating a database on pollution level along the National Highway No. 8, study of
aerial photographs of Kishangarh-Ajmer area was undertaken and geological map (1
:50,000) covering 300 sq.km. around Kishangarh-Gagwana-Shrinagar area under
toposheets No. 45 J/l 0, 14 & 15 was compiled. '
Table-II
CONTINUING
ITEMS
2. AIRBORNE MINERAL SURVEYS & EXPLORATION GEOLOGICAL
SURVEY OF INDIA (WESTERN ZONE), JAIPUR
Review material for the period from April, 2004 to March, 2005:
During the period under review AMSE Western Zone, Jaipur carried out six field
investigation pertaining to two field seasons; .2003-04 and 2004-05. Three items taken
up during field season 2003-04 were completed in September, 2004. Three new items of
investigations are under progress during the current field seasons 2004-05.
The investigations completed during the field seasons 2003-04 are as follows:
Ground evaluation of Magnetic and Radiometric aerogeophysical anomalies
resulting from Twin Otter Surveys in parts of Bhilwara and Ajmer districts of
Rajasthan. .
Investigation for basemetal and associated Noble metal mineralisation in Ghagri Block
of Salumber area, Udaipur districts, Rajasthan. (E-l stage).
Investigation for basemetal mineralisation in Umarvaniyan Block, SalumberDhariawad
area, Udaipur districts, Rajasthan.
The progress of work during the period April-September, 04 in these items of
investigation is as follows:
Item No: ASGE/AMS/ZS/2001/0I0:
Title: Ground evaluation of Magnetic and Radiometric aero-geophysical
anomalies resulting from Twin Otter Surveys in parts of Bhilwara and
Ajmer districts of Rajasthan.
Area:
Gangapur, Nasirabad.
The area was covered by multi sensors magnetic, electromagnetic and spectrometric
survey by Twin Otter aircraft of GSI during the field season 1994-95 and 1995-96.
Several electromagnetic, aero-electroluagnetic and spectrometric anomalies have been
recorded from the belt covering an aerial extent 6000 sq. km. During the field season
2001-2002, block IA and II A were ground evaluated. During the current field season
block II-C and II-D are taken up.
During the period under review a total of 194 nos. of AEM and 35 nos. of magnetic
anomalies have been ground evaluated in block IIC of Gangapur Nasirabad flown belt.
A total of 187 nos. of geochemical samples have been collected from areas with
favorable geological and geophysical indications.
The area exposes miglnatites and biotite gneiss belonging to Sandmata complex of
Bhilwara Supergroup. These include augen gneiss, basic granulite, grey gneiss and other
associated high grade meta-sedimentary gneisses. Majority of surface and shallow depth
AEM anomalies are falling on the reservoir/local ponds/prominent steams and along
river courses. However anomalies which do not coincide with these features, may be
because of subsurface water bearing zones. No surface indications of mineralisation
were noticed. However few rocks/soil samples have shown positive response to OX-Kit.
Item No. MIE/AMS/ZS/2003/010
Title:
Investigation for basemetal and associated noble metal mineralisation in
Ghagri
blocks of Salumber Udaipur area, District, Rajasthan. (E-l).
Area: Ghagri, Udaipur District.
The Basal part or Aravalli Supergroup rocks near BGC contact having sulphides and
gold mineralisation around Salumber area is exposed as prin1ary and secondary halos at
a number of localities. At about 12 km. NE of Salumber and 1 km. south of Ghagri
village the rock types exposed include felsic volcanics, dolomites and metabasic rocks
belonging to Delwara Formation of Debari Group of Aravalli Supergroup. An arcuate
700 m. long linear zone of old workings pits and adits is located in impure dolomites in
the central part of the block. Systematic geochemical surveys in the block have indicated
copper values upto 4000 ppm in bed rock and upto 7100 ppm in soil samples.
Test drilling in the block carried out during F.S. 2001-02 was continued as spill over
work during 2002-03. A total of three boreholes, RGH-l, 2 & 3 were drilled involving a
total 497.65 m. Boreholes RGH-2 & 3 intersected the following sopper zones:
RGH-2 Zone-I 98.85-100.10 = 1.25 In. x 0.26% Cu
Zone-II
102.00-109.90 = 7.90 m. x 0.35% Cu
Zone-III
121.00-130.35 =-9.35 m. x 0.32% Cu
RGH-2 Zone-I 98.25-102.30 = 4.05 111. X 0.83% Cu
Zone-II
104.75-106.45 = 1.70 m. x 0.53% Cu
Ground geophysical surveys carried out in the block during field season 2002-03 have
indicated encouraging IP and SP response over old workings zone.
In view of the above boreholes, RGH-2 & 3 (as above) and subsequent boreholes RGH4, 5, 6 & 7 have established the strike length of the mineralised zone for over 700 m.
corroborating with linear arcuate zone of old working in the area. The assessment of ore
potential of the block is under progress.
Item No. MIE/AMS/ZS/2003/011
Title: Investigation for basemetal mineralisation Umarvaniyan Block,
Salumber-Dhariwad area, Udaipur District, Rajasthan. (E-l stage).
Area:
Umarvaniyan Block, Udaipur.
Investigation was taken up as a new item during the field season 2003-04.
Aerogeophysical anomaly (6 channels EM) over dolomites in Umarvaniyan has been
recorded. The rock types exposed in this area are dolomite, carbonaceous phyllites and
metabasics belonging to Jagpura formation of Debari Group of Aravalli Supergroup.
The lithogeochemical survey in the area indicated anomalous Zn values (1500 ppm to
2400 ppm) associated with high Ni (100 ppm -530 ppm) and Co (100 ppm -290 ppm). A
random sample of slag-analysed 0.27 ppm gold. A few bed rock samples of dolomite
from the old working have analysed 0.14 to 0.42% Zn.
~
The surface manifestation of mineralisation is seen in the form of gossan and old
working in dolomite with slag dumps. In the vicinity, evidences of brittle-suctile
shearing have been recorded in the form of brecciation, silicification and S-C fabric in
dolomites.
During the period under review an area of 0.5 Sq.k.m. has been mapped on 1: 1000
scale. A new gossan zone with a series of old working has been located east of
Umarvaniyan block.
A total of 5 borheoles UMB-l, 2, 3, 4 & 5 have been drilled involving 759.10 In. of
drilling. The boreholes have been spaced 100 Ill. apart. A total of 490 Nos. of core
samples have been collected from boreholes, Geochemical samples (126 Nos.) and
petrographic samples (15 Nos.) have also been collected from this block. .
All the boreholes drilled in the block intersected sulphide mineralisation principally of
pyrite with low basemetal values. Hence no further work in the area was taken up and
the investigation was completed.
During the current field season 2004-05 AMSE, western zone has taken up three items
of field investigations. Out of these three items one item pertains to ground evaluation of
airborne geophysical anomalies resulting from Twin Otter surveys in Todaraisingh and
Fatehpura blocks of Tonk district, Rajasthan. Two P-Il stage investigations pertain of
test drilling for basemetal and associated gold mineralisation in Manpur south and
Baratalav blocks of Udaipur district.
ltem No. : ASGE/AMS/ZS/2004/011 :
Title: Ground evaluation of aero-geophysical anon1alies resulting from Twin
Otter Surveys in Todaraisingh and Fatehpura Blocks of TonkI{ districts of Raj
asthan.
Area: Todaraisingh and Fatehpura Blocks of Hindoli Belt
The area was covered by multi sensors magnetic, electromagnetic and spectrometric
survey by Twin Otter aircraft of GSI during the field season 1994-95 covering an area of
about 2480 sq.km. A total of 195 E.M. centres (82 in Todaraisingh and 113 in
Fatehpura) have been recorded from these blocks. The area of these blocks constitute
rocks of Hindoli Group of Bhilwara Supergroup. These included shale, slate, phyllite
and mica schist with interstratified sequence of meta-greywacke, metavolcanics (with
lapillae bearing altered tuff), quartzites and dolomite.
During the period under review 140Nos. of AEM anomalies and 30 Nos. of Magnetic
.anomalies were ground evaluated. A total of 85 geochemical bed rock samples and 60
Nos. of soil samples were collected from geologically favourable sites.
Most of the E.M. anomalies fall on soil covered areas. Further work in the blocks is
under progress. Old workings are located at Gar village (45 0/9) over NE-SW trending
ridge progress. Another old working (50 m. x 5 m.) is observed near Gardhari village
(45 O/1 0)in ferruginous breccia trending E- W. Geochemical samples have been
collected from these old workings. Slag dumps are recorded at Chandwar village.
ltem No. : MIP/AMS/ZS/2004/012 :
Title: Investigation for basemetal and associated noble metal mineralisation in
Manpur south block, Udaipur District, Rajasthan. (P-Il stagc).
A rea: Manpur south block, Udaipur District, Rajasthan.
Manpur block is located about 100 km. south-east of Udaipur was flown by
BRGM/CCG during 1971-72. Several short width discrete EM anomalies along with
magnetic signatures have been recorded in the area.
The rock types exposed in this area comprises phyllites, dolomite, dolomitic marble,
metabasics and quartz-chlorite schist belonging to Jagpura formation of Debari Group of
Aravalli Supergroup. Series of old workings with gossan and siag dumps are surface
manifestations of mineralisation in the area. .
During the period under review an area of 0.5 sq.km. was geologically mapped on 1: 1
000 scale and 174 Nos. of bed rock geochemical samples and 26 Nos. of soil samples
have been collected from the area. A total of 200 m. of drilling has been done in one
borehole RMS. This borehole intersected sulphide -bearing dolomite from 70.00 to 120
m. depth along hole. The sulphides are in the form of dissemination of pyrrhotite,
Arsenopyrite, Chalcopyrite (About 1-1.5%, VE sulphides). It also includes a 60 cm.
zone of massive pyrrhotite from 82.10 to 82.70 m. containing about 60-65% VE
sulphides. A total of 50 Nos. of core samples have been collected from this borehole.
Further drilling investigation in the block is in progress.
Item No. : MIP/AMS/ZS/2004/013 :
Title: Investigation for basemetal and associated noble metal mineralisation in
Baratalav block Udaipur District, Rajasthan. (P-Il stage).
Area: Baratalav blocl{, Udaipur District, Rajasthan.
The area was flown by BRGM/CCG during 1971-72. Significant short width six channel
EM anomalies with magnetic signatures have been located around Baratalav village.
The rock types exposed in the area comprises dolomite marble, garntiferous schist and
phyllites belonging to Jagpura formation of Debari Group of Aravalli Supergroup.
During the period under review an area of 0.5 sq.km. was geologically mapped on 1: 1
000 scale and 259 Nos. of bed rock geochemical samples have been collected from the
area.. A total of 552.90 m. of drilling has been carried out in three boreholes BTV -1, 2
& 3. All the boreholes intersected sulphide-bearing zones in calc-silicate, dolomitic
marble and garnetiferrous mica schists. The principle sulphides in zones are pyrrhotite,
chalcopyrite, arsenopyrite and pyrite. A total of 756 Nos. of core samples have been
collected from sulphide zones of the above borehole. The analytical data of boreoles is
awaited. Data of a few core samples received during the period has shown low values of
gold and copper. Further drilling investigation in the block is in progress.
3. COAL WING (GEOLOGICAL SURVEY OF INDIA, (KOLKATA)
A.Work Done in Rajasthn during the year 2004-05 (April, 2004 to March, 2005) :
Search for lignite by scout drilling in Nagrasar area, Palana Basin, Bikaner and laisalmer
districts, Rajasthan.
Item Code No. MIE/CW/2003/015 :
The Nagrasar area is located in the southwestern part of Palana Basin where lower
Tertiary sediments (Palaeocene-Lower Eocene) occur over the uneven basement of
Nagaur Group of rocks (Early Cambrin to Proterozoic). Department of Mines &
Geology, Rajasthan (DMGR) has already proved the occurrences of lignite in Raneri
and Heera Ki Dhani, east of Nagrasar area within the Tertiary sediments.
The exploration programme of scout drilling in Nagrasar area is being continued in the
field season 2004-05 with the objective to locate the lignite bearing areas and decipher
the stratigraphic set up and basin configuration, in the virgin southwestern part of Palana
Basin. A total of 1297.35 m. has been drilled. The sub-surface data generated so far
indicate deepening of basin in western part of Palana Basin, with over 250 m. thick
Tertiary sediments. A thick zone 2.50 In. of grayish black carbonaceous clay with lignite
stringers have been encountered in boreholes drilled near Devra-Ki-Dhani and Kolasar
within depth range of 101.75 m. to 158.70 m. Lignite (0.40 m. thick) has been
intersected south of Borana village at shallow depth. This is first indication of lignite
occurrence in the southwestern part of Palana Basin.
The investigation will be concluded by end of Septelnber, 2005.
B. Investigation proposed by Coal Wing, Geological Survey of India during the F
.S. 2005-06 :
(i) Title:
Search for lignite by scout in Borana east block, Bikaner & jaisalmer
districts, Rajasthan.
(ii) Objective: To locate and delineate the lignite bearing blocks and establish the strati
graphic set up of the southwestern part of Palana Basin.
Two drills are proposed to be deployed in Borana east block with envisaged drilling of
2200 m. for a period of one year.
4. M/s HINDUSTAN ZINC LIMITED, UDAIPUR:
A. Hindustan Zinc Limited Annual Progress of Exploration (April 2004March"2OO5):
1.Kayar ML
Assay results of 112 soil samples collected during the previous year show zinc values
ranging from 80 to 150ppm Zn. A total of 7.50 line Km. of line domain EM survey was
conducted to locate extension of known mineralisation further east in the hanging wall.
As the results were found encouraging in harmony with the litho-structural
interpretation, five deep holes involving 2595111 of diamond drilling was carried out to
test the depth continuity of main mineralisation. All the holes have intersected
mineralisation (> 10% Pb+Zn) over varying widths of 2 to I5m. The results are under
evaluation and further drilling work is planned to outline additional potential.
2.Agucha Extensions
In South extension, soil geo-chemical sampling (127 Nos.) and Time domain ElectroMagnetic survey (22.6 line km) was undertaken to locate promising areas. A total of
4502m of non-core and 11771n of core drilling were carried out in the old working area
south of mine.
Drilling results indicate presence of minor pyrite-pyrrotite with varying amount of
graphite (traces to 5%). Elevated lead values upto 0.60% were recorded in drill chip
samples at few places in some percussion holes. On the other hand, anmalous lead and
zinc values were also recorded in some drill cores. DD hole (SRA-1) intersected 2 zones
with elevated zinc grades: 13m with 0.27% and 4m with -1.0%. The other hole (SRA-3)
encountered 1 m length containing 0.13% lead and 0.66% Zinc.
Further work involving IP survey and drilling is in progress.
In North extension, further EM survey (9.45 line Km.) and soil sampling (258 samples)
was carried out. The assay results show erratic dispersion of zinc content in the soil.
Isolated highs (550 - 5400ppm Zn) are noted at places. A total of 626m of non core and
433m of core drilling was carried out during this year to test these isolated anomalous
zones but no encouraging values were obtained.
3.
Ajmer RP (RP-l/2001)
The assay results of 700 soil samples were not found encouraging. However, the
reconnaissance litho structural mapping and integration with airborne survey data
indicates potential in North extension of Kayar. Accordingly, an area of 24.08 sq.km.
near village Kayar Chachiawas and Makarawali was identified and prospecting license
applied. The remaining area of RP was relinquished.
Expenditure (provisional) : During the year 7.4 Lac. Cumulative - Rs. 21.5 Lac.
4 Gluabpura RP (RP-2/2001)
Regional geological mapping (-550 sq. km. area) was carried out in central and southern
part of RP. Most of the mapped area comprises of granite genesis with subordinate
amount of amphibolite, biotite schist, pasmmo-pelite rocks and pegmatite. Locally calc
silicate/dolomite is also mapped but no mineralisation signatures were noted except for
stray occurrences of Malachite at the contact of granitic gneiss with amphiobolite /
dolerite in Sathana area.
The geological data was evaluated in the light of airborne EM and magnetic data of
HZL-BHPM survey and four promising targets were selected for further follow up
through soil geochemical survey. A total of 248 samples were collected. The assay
results indicate no anomalous dispersion of zinc and lead in the soil.
Further interpretation through assimilation and evaluation of available data is in
progress.
Expenditure (provisional) during the year – Rs. 12.507 Lac. Cumulative – Rs. 16.907
Lac.
5 Re-processing of Airborne Geophysical Data
Reprocessing of airborne geophysical data (Magnetic and EM) has been undertaken to
generate new targets.
5 DEPARTMENT OF PETROLEUM
A. Introduction
Government of India had identified 12 blocks in Rajasthan for oil & gas exploration . 5
blocks for oil & gas and 2 blocks of CBM have been awarded to National/Multinational
Companies & 3 blocks have been offered under NELP-V rounds of Bidding.
Exploration is underway in 5 blocks as per below:
i Block RJ-ON-90/1 Barmer- Sanchore Basin, M/s Cairn Energy:
Initially, Shell India carried out exploration & discovered light oil, and transferred the
operatorship to M/s Cairn Energy of Scotland. The Company drilled 55 wells during
2004-05 and discovered oil in 9 fields. Reserves of 300 million tones have been assessed
in this area. Further exploration work is under progress. Production of oil & gas in
Barmer-Sanchore Basin is expected from 2006-07.
ii Block RJ-ON-6 Jaisalmer Basin, M/s Phoenix Overseas Ltd.
In the block the company has carried out 577.5 LKM 2D seismic data acquisition work
company has spud the 1st well (PHC-2) in Shahgarh of Jaisalmer & drilled up to 1973 m.
The 2 exploratory well (PHC-1) was drilled upto the depth level of 4133 m. till March,
2005. The testing in the 2nd well will be done with workover rig and it may get
prolonged as there are multiple small interesting zones.
The company has arranged to move the existing drilling rig to the location of third
exploratory well No. PHC-3 (Armaan # 1) in block.
iii Block RJ-ONN-2000/1 Jaisalmer Basin, Oil India Ltd.
Acquisition of 300 GLKM of 2 D seismic data in the block & reprocessing of 200
GLKM of existing data is completed.
iv Block RJ-ONN 2001/1 Bikaner- Nagaur Basin, Oil India Ltd:
Interpretation of 250 sq.km. of newly acquired 2D seismic data alongwith all available
seismic data including 350 GLKM of reprocessed data is completed. Draft report of
interpretation has been received. the draft report has been reviewed.
v Block RJ-ONN-2002/1, Bikaner-Nagaur Basin, OIL & ONGC:
Interpretation of 250 sq. km. of 3D seismic data is completed and final report submited.
A total of 6 medium to small sized structural prospects have been identified at various
stratigraphic levels within Palaeozoic and HC resources for these prospects estimated.
Newly aquired 500 GLKM of 2 D seismic data is being processed (progress – 90%).
This will be followed by interpretation of all available seismic data in the block.
vi PEL Miajlar East, ONGC:
PEL block of Miajlar east measuring an area of 1591 sq. km. one exploratory well
would drilled at location namely, well MJAA.
vii Blocks BS (I)-CBM-2003/1 : Reliance Industries Ltd:
Reliance Industries Ltd. has applied for a PEL for Coal Bed Methane measuring an area
of 1045 sq. km. in district Barmer and Jalore on dated 23.6.2004 and the proposals for
the grant of PEL has already been sent to State government vide our letter DP/F.188/394
dated 14.7.2004 Approval of Government of India has been received for the same PSC
was signed on dated 6.2.2004. The State Government will issue the sanction order
shortly.
vii Block BS(II)-CBM-2003/1 : Reliance Industries Ltd:
Reliance Industries Ltd. has applied for a PEL for Coal Bed Methane measuring an area
of 1020 sq. km. in district Barmer and Jalore on dated 23.6.2004 and the proposals for
the grant of PEL has already been sent to State government vide our letter DP/F.188/393
dated 14.7.2004. Approval of Government of India has been received for the same PSC
was signed on dated 6.2.2004. The State Government has issued sanction order vide
letter No.F.18(14)Mines/Gr.2/2004 dated 15.3.2005
B. PROGRESS CARRIED OUT DURING 2004-2005 :
1 The Department of Petroleum and GAIL (India) have signed Gas-Cooperation
Agreement (GCA) on 10.9.2003 and are jointly undertake a comprehensive gas sector
study covering the gas demand and assessment of pipeline infrastructure and other
related facilities to supply gas to cover major end users like Industrial, Commercial and
Transport sectors. Besides, the Mathania Power Plant Demand – Supply Assessment
study has been carried out for Kota, Chittaurgarh, Bhilwara, Pali, & Jodhpur districts
enroute to Kota- Mathania Sector.
The draft report submitted by GAIL (India) Ltd. has been put up before the Members of
JWG for its evaluation.
2 Two new blocks carved out by Department of Patroleum, namely, block Lunder-I
(3620 sq. km.) in Jaisalmer Basin & block Lunder-II (2375 sq. km) in Bikaner-Nagaur
Basin and one more block namely JM-ONJ-I (1800 sq. km.) in Jaisalmer Basin out of 12
identified blocks have been sent to Government of India for inclusion in NELP-V.
Government of India has offered blocks in two basin namely Jaisalmer Basin &
Vindhyan Basin i.e. RJ-ONN-2003/1 (1335 sq. km.) RJ-ONN-2003/2 (13,195 sq.
km.) & VN-ONN-2003/1 (3585 sq. km.) under NELP-V. This offer is valid upto
31.05.2005.
3 The Department has entrusted 100# 20 LKM High Resolution seismic Survey (HRSS)
to NGRI, Hyderabad. This will decipher deep-seated lignite zones in the area, which
shall be potential for CBM. NGRI has completed 116.11 LKm. HRSS Survey in Bikaner
area and processing and interpretations work is under progress.
4 Geological & Reservoir studies has been conducted by PDVSA, Venezuela for the
establishment of producibility of heavy oil in Baghewala area, District Jaisalmer.
5 Efforts have been made to increase the supply of Natural Gas to 110 MW Ramgarh
based power plant from the gas reserves discovered by Oil & ONGCL. OIL has
increased the gas production from its ML area i.e. Tanot-Dandewala area, district
Jaisalmer from 4.5 MMSCMD to 7.0 MMSCMD.
C INVESTIGATION PROPOSED FOR THE YEAR 2005-06 :
1 Cairn has planned to drill 300 wells in development fields of its Mining Lease area. 18
well in appraisal area and 3 wells in remaining PEL area in Barmer – Sanchore Basin.
2 3rd Exploratory wells shall be drilled by Pheonix Overseas in Jaisalmer Basin.
Additional 2-D seismic data of 100 LKM would also be acquired.
3 Reprocessing of 200 LKM of 2D seismic data and 150 LKM would acquired
processed and interpretated in block RJ-ONN-2002/1 by OIL.
4 One exploratory well shall be drilled in Block RJ-ONN-2002/1 by OIL.
5 Processing and interpretation of acquired HRSS data will be completed in BikanerNagaur Basin, which shall be followed by drilling of 3 boreholes for CBM.
6 On the basis of study the company is planning to drill a Pilot well in Baghewala area
for trial production of Heavy Oil in the 3rd quarter of boreholes for CBM.
7 Department has signed a MOU with GAIL (India) Ltd. for R&D work for insitulignite
gasification in Bikaner – Nagaur Basin.
8 Implementation of Techno – Economic Study conducted jointly by Directorate of
Petroleum & GAIL to develop pipeline infrastructure from Kota – Mathania for the
supply of 15 MMSCMD of R-LNG.
6. M/s RAJASTHAN STATE MINES AND MINERALS LIMITED:
RSMML was not engaged in any exploration work during the period April 2004 –
March 2005. However, the Mineral wise details of the deposits along with the
production during financial year 2004-2005 are given below:
Rock Phosphate Project:
The Jhamarkotra Phosphate Deposit has unique geological antiquity. It represent one of
the oldest sedimentary phosphate in the world formed primarily due to the metabolical
activities of the primitive plant organisms called "Blue Green Algae" in shallow parts of
Aravallian Epicontental sea dated 2000 million years ago. Un-disputable geological
evidences exist for corroborating the above theory on the origin of Jhamarkotra
phosphate deposit. The blue green algaes through the process of diagenesis had got
converted into sedimentary structure called "Stromatolites" which control the grade
distribution pattern of the entire deposit.
The deposit, shows a Bi-modal grade distributions pattern viz +30% P2O5 designated as
HGO (High Grade Ore) and 16 to 22% P2O5 designated as LGO (Low Grade Ore)
could be deciphered. (The study of physical characteristics of the phosphate bed also
corroborate the above analysis). However, at places near the contacts of the above
grades of phosphate bed, some transitional zones exist which are designated as MGO
(Mixed/Medium Grade)
The production of Rock Phosphate during the financial year 2004-2005 is as shown
below:
Type of Ore
High Grade Ore (+31% P205) for SSP
High Grade Ore (+3$% P205) for DAP
Beneficiated Rock Phosphate
Rajphos & Low Grade Ore
Total
Quantity
(Lakh
Tonnes)
6.72
2.01
2.06
.65
11.44
2 Gypsum Project:
Gypsum is being mined in the district of Bikaner, Hanumangarh, Barmer, Jaisalmer and
Sriganganagar. The excavation of gypsum/ Salenite is being done by contractors. The
production of Gypsum/Salenite from the different mines during 2004-2005 was 28.72
Lakh tonnes.
3 Limestone Project:
SMS Grade Limestone is being mined out near Sanu village in Jaisalmer district. The
production of SMS Grade Limestone during 2004-2005 was 18.47 Lakh tones.
Deposit/Type of Ore
Jaisalmer (SMS Grade) –Sanu Mines
Gotan (Chemical/Cement)
Bhinmal
Total
Quantity (Lakh Tonne
16.26
3.41
0.0041
19.6741
2 Lignite Projects at Giral & Kasnau – Matasukh
Lignite is being exploited from Giral and Kasnau – Matasukh deposits. Due to the
interference of ground water in the pits, mining has been temporarily suspended in the
kasnau – Matasukh project. Drilling of Tube Wells for De – watering are in progress and
mining of Lignite is likely to be commenced very shortly.
Brief Geology of the Giral Deposit
The rock units in the area are represented by sedimentary assemblages from the
Cretaceous to the Recent age. A major part of the area is covered by aeolian sand.
Lignite horizons
Three broadly co-relatable, though discontinuous lignite horizones designated as Top,
Middle and Bottom have been identified. Structural disturbances in the form of five F1
to F5 have been interpreted from borehole data.
The production of Lignite from Giral Mines during 2004-2005 was 5.48 Lakh tonnes.
3 Projects in the Pipeline
Joint Venture Project
a
For setting up of a DAP plant with R.C.F. a MOU has been signed by RSMML
& RCF, M/s PDIL has been appointed as a consultant for preparing the feasibility report
for the project.
b
MDC, RSMML and Binani Industries will jointly operate the Deri and
Basantgarh Base Metal Deposits in Sirohi district of Rajasthan & Ambaji mines in
Gujarat.
Other Mineral Based Projects
a Phosphate Rich Organic Manure (PROM) is being promoted by RSMML for use as a
fertiliser.
b Plaster of Paris from our Gypsum resources and Hydrated Lime using the lime stone
of Gotan are the projects for the future.
7 OIL & NATURAL GAS CORPOTATION LTD.
A PROGRESS OF WORK DONE DURING 2004-05 :
A ONGC, Rajasthan continued its exploratory activities under its PEL during the year
2004-05. The well CT-I which was drilled and tested in 2003-04 was plugged with
cement for absolute safety in view of its isolated location/ strategic position and is
proximity to the intemational border. Further, the X-mas tree was also removed and a
plate was welded at the well mouth and the rig E-760-XIII was released on 28.4.03.
1 DRILLING
There was no drilling in Rajasthan during 2004-05.
2 GAS SUPPLY DURING 2004-05:
Average daily production
Cumulative Gas supply
No. of wells connected
Revenue generated
0171.216 m3/day
812494 m3/annum
ight
,85,69,918/-
3 SEISMIC DATA:
About 90.944 sq.km. 3D seismc data was acquired from PEL block south Kharatar in
Jaisalmer basic for interpretation and prospect generation.
B WORK PLANED FOR 2005-06:
4 DRILLING:
An exploratory well MJAA in Miajalar bock is planned to be drilled for which necessary
clearance from Desert National Park/ Rajasthan government is still awaited.
5 SEISMIC DATA:
Plan:
3D-75 sq km. (approx) in south Kharatar PEL
2D -100 GLK (approx) in Bikaner-Nagaur area.
8 OIL INDIA LIMITED:
OIL (RP) maintained its commitment of supply of natural gas to M/s RVUNL for their
power plant at Ramgarh in Jaisalmer district. A total of 194.75 mmscum of natural gas
was produced during the year 2004-05.
OIL carried out workover in thirteen No. of wells during the financial year 2004-05. On
completion of workover operations, OIL is geared upto supply natural gas @ 0.70
mmscumd from mid November, 2004.
250 GLKM of 2D seismic data was acquired and processed in NELP Block RJ-ONN2000/1 awarded to OIL under NELP-II round of bidding. Interpretation of the acquired
and existing 2D seismic data is in progress. The total area of the block is 2535 sq.km.
and falls in the district of Jaisalmer. Reprocessing of 350 LKM of existing 2D seismic
data has been completed utilizing facilities. Enviromental Impact Assessment (EIA)
study prior to carrying out seismic survey has benn carried out and the report submitted
of State Government on 14-5-2002.
500 GLKM of 2D and 250 sq.km. of 3D seismic data was acquired and processed in
NELP Block RJ-ONN-2000/1 awarded to OIL under NELP-III round of bidding. While
interpretation of the acquired 3D seismic data has been completed processing of
acquired 2D seismic data is in progress. It is planned to acquire additional 3D seismic
data of 62.5 sq. km. during the year 2005-06 in the block. The total area of the block is
3425 sq. km. and falls in the district of Bikaner. Environmental Impact Assessment
(EIA) study has also been completed in the block prior to seismic survey under a
contract service.
300 GLKM of 2D seismic data has been acquired in NELP Block RJ-ONN-2002/1
awarded to OIL in NELP-IV round of bidding, against committed 150 GLKM of 2D
seismic data. 200 GLKM of existing 2D seismic data has been reprocessed in the block
during the 2004-05. The block covers an area of 9900 sq.km. Pre-seismic EIA study was
also carried out in the block.
The final report on consultancy study carried out by M/s PDVSA, Intevep of Venezuela
was submitted to OIL in June, 2004. On the basis of recommendations of the study, it is
planned to drill a pilot well in Baghewala area during 2005-06 and to carry out trial
production of bitumen reserve using cyclic steam stimulation in upper Carbonate
formation.
OIL has planned to commence next phase of drilling in Rajasthan starting from August,
2005. It is proposed to drill about 15 (5 exploratory, 8 development for gas field
development and 2 R & D wells in Baghewala for trial production of heavy oil and
bitumen reserves wells during 2005-06, 2006-07 and 2007-08. OIL is committed to
supply natural gas to M/s RVUNL @ rate of 0.70 mmscum during the year 2005-06.
9 M/s HINDUSTAN COPPER LIMITED :
Progress Report 2004-2005
Name of the Mine
Khetri Copper Mine
Kolihan Copper
Mine
Chandmari Copper
Mine
Reserve as on
1-4-2004
59.53 Million Ton
x 1.36% Cu
22.45 Million Ton x
1.33 % Cu
0.095 Million Ton X
1.32 % Cu
Diamond
drilling
NIL
Mine
Development
279m.
NIL
552m.
NIL
NIL
10. INDIAN BUREAU OF MINES
Progress of work carried out by IBM in the State of Rajasthan during the year
2004-05 (April, 2004 to March, 2005).
1 Geological studies/special studies/MCDR inspection carried out during 2004-2005.
A MCDR Inspections :
A total of 149 mines located in Rajasthan state were inspected by Ajmer and Udaipur
regional officers of IBM.
A category wise break-up :
Category
Mech. O/C Mines
Mech. U/G mines
Lease expiring within last 2 year
Ministry reference
Other (i) Cat A
(ii) Cat B
TOTAL
Number
13
4
05
Nil
01
126
149
Mining Plans/Scheme disposal
(a) Inspections:
In Rajasthan State 68 mining plan/scheme inspections have been carried out.
(b) Approval of Mining Plan/Scheme
Received – 129, Approved – 81
B Geological studies carried out during 2004-2005:
Special Integrated Study (SIS) of Feldspar/Quartz/Soapstone mines of Rajasthan.
During the year 2004-05, 41 Feldspar/Quartz/Soapstone mines in Rajasthan were
covered under geological study. The outcomes of the study are enumerated below:
1. Outcome of the SIS Feldspar/Quartz/Soapstone mines of Rajasthan:
Special study of mines with particular reference to promote and monitor community
development in mining areas has been carried out in Bhiwlara and Bikaner districts by
this region during the year 2004-05. The special studies are area specific with a
multimineral approach which conceptually covers all mining geological aspects in
cluster of mining activity in these districts focusing on the problems and approaches for
likely solutions in the field of mineral conservation, scientific mining and protection of
environment. Total 41 mines of soapstone, clay, quartz/feldspar & mica have been
covered under this study. The special study of Ajmer Regional office covered 27 lease
holds in Bhilwara district comprising of soapstone, clay, pyrophylite, quartz and
feldspar mines and 14 lease holds of clay in Bikaner district. The conclusions and
recommendations arrived out of this study are as follows :
(A) Geology and Exploration:
1 The soapstone deposits of Bhilwara are associated with dolomite and quartzite of
Jahazpur Group of rocks. The occurrence of talc and soapstone bodies are reported in
the core of tight folds and the proximity of dolomite suggest that talc has been formed
by alteration of dolomite along major shear zone. The general strike of the soapstone is
in a NNE-SSW to NEW direction. The clays of Bhilwara have two type of origin,
namely, sedimentary type of fluviatile origin and the other type of deposit is of alteration
of phylite and schist of Jahazpur Group. The quartz and feldspar mines are restricted to
the pegmatite venis intruded into the granite gneiss of Sandmata Complex of Archaean
age. In Bikaner, there are three main beds of clays interveded by sandstone and siltstone.
It is sedimentary in nature.
2 As regards gaps in exploration, scientific and detailed exploration has not been carried
out so far particularly for soapstone, clay deposits in the area covered under study in
Bhilwara district by State carried out by these leases. This may either due to intermittent
working or temporarily closed for long period either due to poor grade or/ and
noncompliance of statute like consent for permission under water and air act, MOEF
clearance. In mechanised mines Ghewaria and chainpura, there is backlog of 1565 m. in
17 boreholes as target as proposed minerlisation so as to evolved ultimate pit limites.
Further, study reveals that the long stretches of host rock, viz, dolomitic limestone has
not been explored fully in Chainpura, Chewaria, Abhaypura and Bhagwasa blocks to
find out minerlisation loci's. However, pitting and trenching has been carried in
dolomitic limestone at shallow depth of 3-5 m., but is not adepuate to explore the
deposit in vergin areas.
3 The graps in exploration has resulted in section of dumping ground, ultimate pit limit
and mineable depth as these areas are happens situated in the forest area, interspersed
with private agricultural land and in the vicinity of Banas River. For immediate follow
up of Backlog & gaps in exploration, suggestion letter and violation letters has been
sought to the concerned lessee.
4 In case of clay deposit of Kolayat area, the exploration inputs have been reached to
satisfactory level as per proposal made in mining plans and schemes by pursuit of
suggestions made in previous studies carried out by IBM, in view to caters need of
reclamations of mined out areas & augmentation of production as per market demand.
This activity is need to be accelerated in other mine out areas in through modification in
mining plan proposals on the basis exploration out puts.
5 In case of quartz & feldspar mines, there is hardly need of explorations as the ample
potential of mineral vested in pegmatite bodies stands as hummocks. exhibiting
topographical control. The exploration practices are mostly confined to know the quality
of feldspar and quartz.
6 The major problems in systematic exploration and development are mostly
acquirement of land for exploration in forest and private lands. The clearance requires
longer time, which in turn affects the scheduling exploration programme. In most of clay
leases of Kolayat area, reserves are sustains to longer gestation period owing the scale
production. Besides, cost of exploration perhaps the main bottlenecks in case of small of
clay, quartz and feldspar.
7 The recoverable reserves of soapstone, clay, quartz and feldspar in the mines covered
under the study are 12, 21.5 and 4.8 million tonnes, respectively. The reserves are
upgraded from time to time of approval mining schemes.
(B) Overall Mining Scenario :
8 mining is mostly manual except three soapstone mine which are in operation by
mechanized method. Mining of soapstone and clay mostly systematic with proper
development of benches & separate benches for overburden and mineral. Approach
roads are available upto pit bottom in most of the mines. Mining of quartz, and feldspar
is rather unsystematic mainly due to the nature of pegmatite body which occur as veins
and require huge investment for systematic development.
9 All the mines except three mechanized mines of M/s UMDS inspected are grouped as
"B" manual. However, it is observed the most clay mine owners resort to the use of
hired Heavy Earth Moving Machineries like excavartors and JCB's with tipper/dumper
combination for removal of overburden waste
and interburden.
10 Major production of soapstone is form the two mechanised mines of M/s UMDS,
which have shown a constant increase in production over the last five year. The
production of soapstone from other mines is negligible and very inconsistent. The
production of clay has more or less remained stagnant at about.
11 Average cost of production of clay is about Rs. 80-100 per tonne. The average cost of
production of soapstone is Rs. 130-550 per tonne. Cost of production of feldspar and
quartz is around Rs. 150 to 175 per tonne.
12 None of mines inspected have proper laboratory facility to analyze the minerals for
which they are dependent on out agencies like Central Glass and Ceramic Institute and
other small laboratories. The results provided by the small laboratories are often
erroneous and not reliable.
13 The mining lease of clay in Kolayat belt have been granted by State Government by
many names such as white clay, china clay, ball clay, fire clay etc. Moreover, in some
cases the same lease has been granted by two or more names such as china/ball clay
whereas the mineral remains same. Further more, white clay is a non-technical term.
Assigning different terminologies has led to generation of an-erroneous picture
regarding mineral inventory of the country as a whole. These clays are Kaolinite with
high plasticity inventory of the country as a whole. Therefore, it will be in fitness of
things that state Government gives a proper terminology as ball clay for clays occuring
in Bikaner district. The above observation was made during earlier studies in 2001-02
and 02-03.
14 In the soapstone mines of Bhilwara area dolomite and quartzite occur as side
burden, which is excavated along with the soapstone. Presently this dolomite is being
dumped along with other waste due as this is not included as a mineral in the mining
lease. Two dolomite samples were collected and anlysed in the RODL Ajmer and it is
found that there is scope of utilizing this dolomite as a filler or as a flux in the steel
industries. Similarly in the clay mines of Mudh block in Bikaner, fullers earth is existing
as overburden and is being dumped along with other waste material. The fullers earth is
a minor mineral and are not included as mineral to be extracted and exploited and
sometimes allotted to another party. This results in interference in the workings. It will
be fitness of things that fullers earth should be granted to the owner of the clay mineral
so that proper utilisation of fullers earth could be made.
(C) Environmental issues :
1 Land degradation due to mining is minimal considering the total land under lease. As a
percentage, only 13% of land has been degraded due to various mining activities like
pitting, dumping, site services and other miscellaneous uses. Rest of the land is lying as
it is. Land use as percentage of total land held under lease is given below:
LAND USE AS PERCENTAGE OF TOTAL LAND UNDER MINING LEASE
Area
Balance
Afforest- MiscellanQuarries Infastructure Dump
reclaimed area in
ation
eous
by pit
hect
4.43
1.60
3.39
1.08
3.35
0.18
85.95
1 Of the 158 hectares of land degraded by pits 6.30 hectares area has already been
reclaimed.
2 Reclamation of the worked out pits in which mineral has been exhausted has been
commenced in the Kolayat clay belt. This has been possible due to continuous effort
made by the officers of Indian Bureau of Mines to persuade the mine owners for
exploring the pit bottom and start back filling of the worked out pits if no mineral is
found. As no date, of the 14 mines inspected 11 mines have started reclamation of the
pits by back filling and 6.3 hectres have been reclaimed by back filling in Bikaner clay
belt. This was almost negligible when these mines were inspected in the year 2001-02.
3 In the context of reclamation of mine out areas in Bhilwara, it necessary to study geohydrogical aspects since majority of mines are situated in Water Shade Region of Banas
River before reclamation proposals so as utilisation of mined out pits should be come
out as a meaningful opportunity.
4 Exploration in mechanised mines is far lagging behind as stipulated in mining plans;
regular follow up will be required through the provisions made under MCD rules. This
is important in view of dumping management of waste material generated in ensuing
sheme periods.
5 There is a need of study by state Government agencies in region to know the extent of
the day deposits of fluviatile sedimentary deposits of Recent to sub-Recent age occuring
in the vicinity of flood plains of Banas river by recognizing the buried paleo-troughs or
isolated basin. There is hardly knowledge to lessee to differentiate two types of
occurrences.
6 It should made mandatory on the part of lessee to draw the annual programme of
community development and should be proposed in approved mining plan interalia
NGO or as assistance to Government agencies/local civic bodies with priority areas in
regard to IRDP & Village Development Programmes in vicinity of mining areas viz.
shelters, hygiene, sanitation, education, water shade development by rainwater
harvesting and well recharge, social forestry, water stations and fodder camps,
organizing medical & polio vaccination camps.
7 The importance role of mining industry in socio-economic upliftment and its
contribution in environmental aspects is necessary to be brought out to the knowledge
of other cross sections society in the region. Therefore, the proper reporting system
should be evolved yearly basis for community development so as enable to know extent
and sustainable limits of area specific. It is felt necessary that the mines owners should
come forward voluntarily in co-operative manner, present the audio-visual clippings of
their viable outputs due to mining in the regions on various dais.
3 Proposed field programme for the year 2005-2006
A MCDR Inspections
In all 150 mines will be inspected by the officers of Udaipur regional office in 5 districts
of Rajasthan for enforcement of MCDR 1998.
Similarly 275 mines in district of Rajasthan will be inspected by the officer of Ajmer
regional office. The mine will be selected for inspection on following basis of priority.
Open Cast/underground mechanized mines.
Lease expiring within a period of two years.
Non-reporting mines/mines not inspected for the last two years.
Other category 'A' & 'B' mines.
Mining plan/Scheme inspections:
Areas/mines, for which mining plans/schemes will be submitted, will be taken for
inspection.
B Geological studies
(a) No geological studies have been proposed for the annual programme for the year
2005-2006 as the National Mineral Inventory work is assigned for Mining Geologist.
11. GROUND WATER DEPARTMENT:
1 PROGRESS OF WORK CARRIED OUT BY SURVEY AND RESEARCH
WING OF G.W.D. DUIRNG 2004-2005 (APRIL 2004 TO MARCH, 2005):
Physical Task :
Head
NonPlan
Micro
level
survey
Total
Item
Well Inventories
Water sample collection
Chemical Analysis
Geophysical soundings
Well Inventories
Water sample collection
Chemical Analysis
Well Inventories
Water sample collection
Chemical Analysis
Geophysical soundings
Annual Target
12350
11070
11020
1060
Not fixed
Not fixed
Not fixed
12350
11070
11020
1060
Achievement
15115
13039
11085
1343
99
47
15214
13086
11085
1343
2 Ground Water Assessment as on 31.3.2004 :
Ground Water Assessment as on 31.3.2004 for all the district as per guidelines of
National Level Ground Water Estimation committee (GEC) has been completed and
under reconciliation with Central Ground Water Board (CGWB), Jaipur. The
Assessment reports will be published after finalization by the State Coordination
Committee shortly.
3 Construction of Roof-top Rainwater Harvesting Structure:
During the year, department had prepared and submitted various proposals of Rooftop
Rainwater Harvesting Structure in different Govt. building in Jaipur city and other
Division Headquarters. Out of which two structures in Jaipur city were constructed .
Department has identified 51 Roof top Rainwater Harvesting sites in 8 cities.
Department is providing technical assistance in constructing RTRWH in all the
government building pertaining to the Police Department of the State.
4 Proposals for the Artificial Recharge Structure:
The department has prepared a Master Plan for Artificial Recharge to ground water in
the state wherein 299 sites spread in 27 districts were identified. The government has
nominated Irrigation Department as the Nodal Department for this purpose to execute
the work in the various districts of the State. The Irrigation Department has sanctioned
12 Artificial Recharge Structures in Ajmer, Sikar and Sawai Madhopur districts during
2004-05 for which work will be undertaken by the Irrigation Department shortly.
5 Activities under Ground Water component of Rajasthan Water Sector Restructuring
Project (RWSRP) during F.Y. 2004-05.
The activities under the project have mainly started during 2003-04. These are broadly
categorized under two groups. The first Strengthening of Ground Water Department and
second is Ground Water Management Pilot Project in which various activities such as
construction of piezometers in Pilot area, IEC, baseline survey, formation of ground
water management organization etc. to be carried out.
Activities carried out in 2004-05:

Under publication and data dissemination, GIS data base development in 3 pilot
project having total cost approx. 22 lacs has been finalised and project of the
developing software for the three pilot areas were awarded to the Regional
Remote Sensing Center (RRSC), Jodhpur. RRSSC Jodhpur after completing the
work submitted the report and software to the department which is being studied
by Pilot Team Leaders of the project. Besides this, district wise booklets of
ground water status indicating IEC activities were published for Kota, Baran,
Jhalawar, Sikar, Jaipur, Tonk, Sawai Madhopur, Karauli, Ajmer, Alwar, Dholpur
and Bharatpur districts. Website of the department has been developed and
launched.

In the strengtening of G.W.D. total number of 46 piezometers were constructed
in out side pilot areas in Kota, Baran, Jhalawar, Jhunjhunu, Banswara, Jodhpur
and Sawai Madhopur districts.

IEC activities for creation of public awareness regarding conservation and
judicious use of water were carried out by the technical Support Groups in three
pilot areas and one day workshop were conducted Osian-Mandore area in
Jodhpur district and Khamnor block in Rajsamand district to create public
awareness regarding conservation and judicious use water. Similarly 100%
inventories of the wells located in the various villages of pilot area were carried
out and draft gram panchayat level reports were prepared.

Consultancies : The Department has taken action for engaging consultant for
social assessment and for community mobilization in all these 3 pilot areas and
in I.E.C. under the Ground Water Component. The consultancies are under
finalization and likely to be awarded in the next F.Y.
12 ATOMIC MINERALS DIRECTORATE FOR EXPLORATION AND
RESEARCH WESTERN REGION
SUMMARY OF WORK CARRIED OUT DURING THE FIELD SEASON 2004 05
Western Region of Atomic Minerals Directorate for Exploration and Research with
headquarters at jaipur is guiding surveys and exploration for uranium and other
radioactive minerals in the state of Rajasthan and Gujarat. The highlights of the
investigations carried out in Rajasthan are summarized below:
RECONNAISSANDCE SURVEY : (November 2004 April 2005)
Reconnaissance radiometric surveys were carried out in Aravali Supergroup of rocks in
Udaipur district, lower proterozoic Pur-Banera basin in Bhilwara district, Jahazpur
Group of rocks in Bundi district, Marwar Supergroup of rocks in Pali district and
Calcretes in Jalore district.
DRILLING
A ROHIL-GHATESHWAR AREA, SIKAR DISTRICT, RAJASTHAN (APRIL,
04 TO MARCH,05 )
Reconnoitory and exploratory drilling was continued in Rohil-Ghateshwar area to
explore the uranium mineralistion in albitites (Delhi Supergroup). 18 boreholes varying
in depth from 244.80 to 823.00m. were drilled. Encouraging uranium mineralisation
intercepts have been recorded in boreholes at vertical intercepts ranging from 60m. to
550 m.
B TIKHI AREA, BHILWARA DISTRICT, RAJASTHAN (APRIL 04 TO
MARCH 05) .
Reconnoitory drilling was continued in tikhi-Mahadev Ka Temple area (Jahazpur
Group), Bhilwara district, Rajasthan to explore the possibility of uranium mineralisation
hosted in banded dolomite quarzite, 6 boreholes varying in depth from 110.05 m. to
350.60 m. were drilled. Gamma ray logging of the boreholes drilled in the area did not
record any significant uranium mineralisation.
EXTRA DEPARTMENTAL BOREHOLE LOGGING : (NOVEMBER, 04 TO APRIL,
05)
Gamma ray logging of the 23 boreholes (total logged meterage 4339.20) drilled in
different parts of Rajasthan (Jalore, Rajsamand, Ajmer, Udaipur, Dausa, Sikar,
Hanumangarh & Jhunjhunu districts) by different exploration agencies like GSI, MECL,
CGWB and DMG Rajasthan was carried out. No significant uranium mineralisation was
recorded in these boreholes.
MISCELLANEOUS:
For approval of mining lease for marble mining, assessment report was for Atomic
Minerals potentials in Devpura and Umedpura areas, disteict Bhilwara, Rajasthan.
13 DEPARTMENT OF SCIENCE AND TECHNOLOGY, JODHPUR
GIS based National Resource Information system is being prepared by this center for all
the districts. It is planned to include relevant data base pertaining to Mines & Geology
Department. The same after integration will be accessible to the Department also and
future updating may also be taken care. It is suggested a nodal officer may be nominated
who may interact with this centre for items to be included in the data base.
15 ANGLO AMERICAN EXPLORATION PVT. LTD.
Status of work done till 31st March, 2005 in RP's :
9 RP blocks totaling 9187.27 sq. km. have been granted to Anglo American Exploration
(I) Pvt. Ltd. in Rajasthan so far.
2 RP's (Agucha and Asind) were executed in July, 2002 Both the blocks fall in Bhilwara
district and have been granted for exploration of copper, lead, zinc, silver, gold and
associated minerals. Exploration activities in Asind block is over and the area have been
relinquished. Exploration activities in Agucha RP are currently in progress.
2 more RP's (Khandela and Ajmer) were executed in August, 2003. Khandela block fall
in Sikar district and Ajmer block falls in Ajmer district and have been granted for
exploration of copper, lead, zinc, silver, gold and associated minerals. Exploration
activities in Khandela RP are over and the entire tenement has been relinquished.
Exploration activities in Ajmer RP is currently in progress.
4 RP's (Shahpura, Kekri, Rupangarh and Kakrana) were executed in May 2004.
Shahpura blocks fall in Bhilwara district, Kekri and Rupangarh blocks fall in Ajmer
district while Kakrana block fall in Sikar district. Exploration activities are in progress
in these RP's.
1 more RP's (Kayar RP) was executed in October, 2004. RP fall in Ajmer district and
has been granted for exploration of copper, lead, zinc, silver, gold and associated
minerals. Exploration activities are in progress in this RP's.
3 more RP's (Mandal, Chalaniya and Zawar RP's) have been applied and are pending
with Central Govt. for approval.
Since major part of these areas were previously explored using airborne geophysical
data, Anglo American did not carry out any aerial surveys. Emphasis is being laid on
other high-resolution ground-based exploration methods including blanket soil
geochemical surveys.
1 RP No. 7/2001 -453.00 sq. km in Bhilwara (Agucha block)
- Area executed on 8th July 2002 and exploration activities in progress.
- Detailed ground magnetic survey at 100 m-line spacing over the entire block (total
5200 line km of data) has already been completed. The data has much higher resolution
than all previous aeromagnetic surveys over the area and is being extensively used for
interpreting geology and structure under cover.
- Entire RP area was initially covered with regional soils surveys at 1000 m x 200 m grid
(total 2436 samples). Results led to interpretation of 47 soil anomalies. Based on site
visits and mapping, four anomalies have been selected for further work in the first pass.
Infill soil sampling at 200m x 50 m grid has also been completed at these four
anomalies. Results are not encouraging.
- Regional geological and structural mapping around Agucha deposit completed.
- Deep-penetrating ground electromagnetic survey over soil anomalies and other
interesting target areas was done to look for deeper conductors. Ground EM failed to
identify any deeper conductor.
- Interpretation of all data sets identified drill targets in two of the anomalies and all the
anomalies has been drilled but failed to intersect any significant basemetal
mineralisation. Three anomalies (Urja Ka Khera and Saerri and BHL-35) were drilled
tasted by 9 percussion holes with 1913 m. of drilling. Geochemical results of drilling
were not encouraging for further work.
2.No. 5/2001 -460.75 sq km in Bhilwara (Asind block)
- Area executed on 8th July 2002 and exploration activities completed.
- Detailed ground magnetic survey at 200 m-line spacing over the entire block (total
2450 line km of data) has already been completed.
- Entire RP area was covered with regional soils at 100 m x 200 m grid (total 2505
samples). Results are disappointing with only 3 low priority anomalies identified.
- Data interpretation and anomaly follow up has failed to identify any drill targets.
- Entire tenement has been relinquished.
RP No. 4/2001 -435.20 sq km in Sikar district (Khandela block)
- Area executed on 21st August 2003 and exploration activities completed.
- Detailed ground magnetic survey at 200 m-line spacing over most of the tenement
block (total 2478 line km of data) has already been completed.
- Entire RP area covered with regional at 1000 m x 200m grid (total 2341 samples).
Results were disappointing with only few low priority anomalies identified.
- Data interpretation and anomaly follow up identified 2 anomalies for drill testing.
- 2 anomalies KHG-19 and KHG-23 drilled with no encouraging results. Total 4 RAB
holes drilled with 644m. of drilling.
- Entire tenement has been relinquished.
4 RP No. 3/2001 -405.61 sq km in Ajmer district (Ajmer block)
- Area executed on 21st August 2003 and exploration activities in progress.
- Detailed ground magnetic survey at 200 m-line spacing over most of the tenement
block (total 2127 line km of data) has already been completed.
- Structural and geological mapping completed in the tenement block.
5 RP No. 4/2002 -1718.70sq km in Bhilwara district (Shahpura block)
- Area executed on 24th May 2004 and exploration activities in progress.
- Detailed ground magnetic survey at 100 m-line spacing over prospective areas (total
3511 line km of data) has already been completed. The data has much higher resolution
and was used for interpreting geology and structure under cover.
- Structural and geological mapping completed in the tenement block at 1:10,000 scales.
- Data penetrating ground electromagnetic survey is being carried out over geochemical
anomalies.
- Entire activities in progress.
6 RP No. 6/2002 -1821.69 sq km in Ajmer district (Kekri block)
- Area executed on 24th May 2004 and exploration activities in progress.
- Detailed ground magnetic survey at 100 m-line spacing over prospective area (total
4502 line km of data) has already been completed. The data has much higher resolution
and was used for interpreting geology and structure under cover.
- Structural and geological mapping completed in the tenement block at 1:10,000 scales.
- Data penetrating ground electromagnetic survey is being carried out over geochemical
anomalies.
- Entire activities in progress.
7 RP No 5/2002 -730.00 sq km in Sikar district (Kakrana block)
- Area executed on 24th May 2004 and exploration activities in progress.
- Detailed ground magnetic survey at 100 m-line spacing over prospective areas (total
1947 line km of data) has already been completed. The data has much higher resolution
and was used for interpreting geology and structure under cover.
- Structural and geological mapping completed in the tenement block at different scales.
- Deep penetrating ground electromagnetic survey was carried out over geochemical
anomalies.(81 line km.)
- Prospective parts of the RP area were covered with regional soils (total 247 samples).
- 2 anomalies Seoli and Saladipura east identified for drill testing.
8 RP No 2/2003 -1180.00 sq km in Ajmer district (Rupangarh block)
- Area executed on 24th May 2004 and exploration activities in progress.
- Detailed ground magnetic survey at 100 m-line spacing over prospective areas (total
500 line km of data) has already been completed. The data has much higher resolution
and was used for interpreting geology and structure
under cover.
- Structural and geological mapping completed in the tenement block at various scales.
- Deep penetrating ground electromagnetic survey was carried out over geochemical
anomalies.
- Entire activities in progress.
9 Kayar RP No. 1982.30 sq km in Ajmer district (Kayar block)
- Area executed on 18th October 2004 and exploration activities in progress.
- Detailed ground magnetic survey at 100 m-line spacing over prospective areas (total
4140 line km of data) has already been completed. The data has much higher and was
used for interpreting geology and structure under cover.
- Structural and geological mapping completed in the tenement block at various scales.
- Deep penetrating ground electromagnetic survey is being carried out over geochemical
anomalies. (25 line km).
- 2 anomalies Bhimyo and Kygei identified for further follow up work.
- Prospective parts of the RP area were covered with regional soils (total 4037 samples).
- Entire activities in progress.
16 METMIN FINANCE & HOLDING PVT. LTD.
PROGRESS
Metmin was granted RP over an area of 942.87 sq.km. in Deri-Pindwara block in Sirohi
District vide Govt. of Rajasthan order No. F19(10)Mines/Gr.2/2001Dated May 3,2001,
which was amended vide order No. F19(10)Mines/Gr.1/2001 Dated December 20, 2001.
RP agreement was executed on 28th December, 2001 for a three year term.
- Metmin carried out orientation and geochemical surveys and collected 4376 samples
on grid pattern.
- Aerial Survey (during 2001) covering as area of 476.4 sq.km. amounting to 5747 line
km.
- Ground geophysical survey in 19 selected blocks.
- Test drilling in 30 bore holes amounting to 8315.20 m of drilling.
- Based on the above exploration activities Metmin discovered number of mineralized
zones but none of these were of economic significant.