Mainstream Minerals - More Bonanza Gold Grades /
Major Geophysical Survey Completed at Bobjo Mine,
Red Lake, ON
Winnipeg, Manitoba – June 18th, 2007
Mainstream Minerals Corporation (TSX.V: MJO) and King’s Bay Gold Corporation
(TSX.V: KBG) are pleased to report that they have received more high-grade gold results
– up to 4.03 ounces per ton (opt) gold - and completed a major ground geophysical
program on their joint venture Bobjo Mine, located in Earngey Township, Red Lake,
Ontario.
Recent sampling from mineralized quartz veins has just returned more high-grade
gold results. Highlights included 138.0 gpt (grams per tonne) Au, 67.9 gpt Au, 67.3
gpt Au, 53.1 gpt Au, 50.4 gpt Au, 36.6 gpt Au, and 32.3 gpt Au. This recent sampling
follows up previously released results by Kings Bay Gold dated December 11th, 2006.
The mineralization sampled in this program was taken from quartz carbonate veins, and
covered an area of approximately 200 square feet. Follow-up channel sampling is
expected to commence in the coming weeks.
The exploration program also consisted of 105.2 kms of line-cutting followed by ground
magnetic and VLF-EM surveys. The surveys were conducted by Dan Patrie Exploration
to establish areas of magnetic elevations, magnetic lows and VLF cross overs to help
define structures and conductors. The readings were taken along the lines at 25 and 100
metres apart and at 25 metre station intervals. These surveys will be used to aid in
targeting new areas for exploration as well as for extensions to known mineralization.
The samples were taken under the supervision and direction of John Archibald,
P. Geologist. Mr. John Archibald is the Qualified Person under National Instrument
43-101. All of the samples were analyzed by Accurassay Laboratories of Thunder Bay,
Ontario, using the standard fire assay method.
Included below are all of the latest 73 sample results taken in recent sampling:
Lab Sample No.
72006
72007
72008
72009
72010
72011
72012
72013
72014
72016
72017
Au opt
1.07
0.17
0.02
0.06
0.35
0.22
0.07
0.07
0.51
0.23
0.23
Au gpt
36.6
5.8
0.6
2.0
12.0
7.6
2.3
2.4
17.4
7.9
8.0
Lab Sample No.
72045
72046
72047
72049
72050
72051
72052
72053
72054
72055
72056
Au opt
0.11
0.20
0.30
0.29
0.10
0.14
0.07
0.05
0.35
0.01
0.17
Au gpt
3.9
6.8
10.1
10.0
3.5
5.0
2.5
1.7
12.1
0.3
5.8
72018
72019
72020
72021
72022
72023
72024
72025
72027
72028
72029
72030
72031
72032
72033
72034
72035
72036
72038
72039
72040
72041
72042
72043
72044
0.27
1.96
0.33
0.02
0.05
0.23
0.04
0.94
0.34
0.21
0.11
0.20
0.30
0.34
0.18
0.41
0.17
0.01
0.31
0.01
0.05
0.10
0.10
0.03
0.17
9.4
67.3
11.2
0.6
1.6
8.1
1.2
32.3
11.7
7.2
3.7
6.8
10.4
11.6
6.2
14.2
5.9
0.3
10.5
0.2
1.9
3.5
3.4
1.0
6.0
72057
72058
85527
85528
85529
85530
85531
85532
85533
85534
85535
85537
85538
85539
85540
85541
103003
103004
103005
103006
103007
103008
103009
103010
103011
103012
0.08
0.15
0.01
0.07
0.05
0.00
0.16
0.13
0.01
0.00
0.13
4.03
0.61
0.62
0.01
0.02
0.36
0.02
0.25
0.23
0.05
1.98
0.06
1.55
0.03
1.47
2.8
5.3
0.4
2.4
1.6
0.0
5.3
4.3
0.2
0.1
4.5
138.0
20.8
21.1
0.5
0.7
12.5
0.6
8.4
7.9
1.7
67.9
2.2
53.1
0.9
50.4
Assays greater then 10 gpt Au are in bold
The Bobjo Mine property is located between the former South Bay and Uchi Lake gold
mines. It is comprised of a total of 9 patented and 86 unpatented claim units (3,800 acres)
with a power transmission line passing through the southern part of the property. The
area has a history of gold and base metal production dating back 80 years and the work
presently being carried out by the partners represents the commencement of the first
modern, systematic exploration of this property. A diamond drill program will
commence very shortly.
About Mainstream Minerals Corporation
Mainstream Minerals Corporation. is an exploration and development company focused
on precious metal mining properties with economic potential, with the aim of bringing
such properties to production. The company is comprised of a well-diversified and
experienced team led by a senior mining executive with extensive experience in the
acquisition, finance, exploration and development of resource projects through to
production. The TSX Venture Exchange recently approved the listing of the common
shares of Mainstream Minerals Corporation. These began trading on the Exchange
on June 13th, 2007.
FOR FURTHER INFORMATION PLEASE CONTACT:
Mainstream Minerals Corporation
Gerald Colborne
President & Chief Executive Officer
(204) 222-0137
Email: info@mainstreamminerals.com
Website: www.mainstreamminerals.com
The TSX Venture Exchange has not reviewed and does not accept responsibility for the adequacy or
accuracy of this release. Some of the statements contained in this release are forward-looking statements,
such as estimates and statements that describe MJO's future plans, objectives or goals, including words to
the effect that MJO or management expects a stated condition or result to occur. Since forward-looking
statements address future events and conditions, by their very nature, they involve inherent risks and
uncertainties.