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Collision Tectonics between the Tarim Block and the
Northwestern Tibet Plateau
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投稿
样板
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位置:居中
XIAO Xuchang1, *, LIU Xun1, GAO Rui1, Houn KAO2 and LUO Zhaohua3
注 意 作 者 1 Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037,
姓氏全大
China; E-mail: xiao@cags.net.cn
写
2 Institute of Earth Sciences, Academia Sinica, Taipei, China
3 China University of Geosciences, Beijing 100087, China
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一级标题
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Abstract: New results from deep seismic reflection profiling, wide-angle
reflection-refraction profiling and broadband seismic experiments reveal that a
series of south-dipping reflectors occur on the southern margin of the Tarim block
(basin).
Key words: collision tectonics, deep structure, NW Tibet plateau
1 Introduction
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正文
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The tectonic relationship between the Indian plate and Tibet proper has been relatively extensively
studied in the past several decades (Lyon-Caen and Molnar, 1984；Mattauer, 1986; Arnaud et al., 1992;
Deng et al., 1996).
2 Geophysical Properties and Its Geological Interpretation
二级标题
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2. 1 The Moho—Variation of the crustal thickness
The Moho depth obtained from the wide-angle reflection-refraction profile is, from north to south,
50 km in the Tarim basin (block)
5 Conclusions
No evidence from our deep seismic sounding has revealed the southward subduction of the Tarim
block beneath the W Kunlun Mountains in the NW Tibet Plateau. So, we think that the “two-sided
subduction” model proposed by many geoscientists may be modified.
Acknowledgements
These research results are part of a key project carried out in 1997–2000 and financially supported
by the former Ministry of Geology and Mineral Resources (No. 9501204 and 9501101), National
Natural Science Foundation of China (No. F49734230) and State Project 305 of the Xinjiang Uygur
Autonomous Region (No. 96-915-07). The authors are grateful to Bao Peisheng and Wang Jun for their
proofreading both the manuscript and computer drawing.
引文格式
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References
Arnaud, N., Vidal, P., Tapponnier, P., Matte, P., and Deng Wanming, 1992. The High-K2O volcanism of NW. Tibet:
Geochemistry and tectonic implications. Earth and Planet. Sci. Lett., 111: 351–367.
Deng Jinfu, Zhao Hailing and Mo Xuanxue, 1996. Continental Roots—Plume Tectonics of China. Beijing:
Geological Publishing House, 1–102 (in Chinese with English abstract).
Frey, F. A., Green, D. H., and Roy, S. D., 1978. Integrated models of basalt petrogenesis: A study of quartz
tholeiites to olivine melilitites from South Eastern Australia Utilizing Geochemical and Experimental
Petrological Data. J. Petrology, 119: 463–512.
Lyon-Caen, H., and Molnar, P., 1984. Gravity anomalies and the structure of Western Tibet and the Southern Tarim
basin. Geophys. Res. Lett., 11: 1251–1254.
Mattauer, M., 1986. Intracontinental subduction, crust-mantle décollement and crust stacking wedge in the
Himalayas and other collision belts. In: Collision Tectonics, Blackwell Scientific Publications, 37–50.
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About the first author
Xiao Xuchang Male; born in 1930; Academician of the Chinese Academy of Sciences,
Vice-Chairman of the Himalayan Regional Committee of Scientific Committee on the Lithosphere. He
is now responsible for the project “Tectonic Evolution and Uplift of the NW. Qinghai-Tibet Plateau”
and has investigated collisional tectonics, ophiolites and high-pressure low-temperature metamorphic
rocks in western China for many years.
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段落：悬挂
缩进 0.35 厘
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注意各单元
的顺序和其
间的标点符
号；作者名
要全列出。
中国人名不
缩写。
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Table 1 Source depths and pressures of the Cenozoic volcanics on the northern margin of the Qinghai-Tibet
Plateau
0.75 磅
Area
Lithologic features
SiO2 (%)
Mg’
P (108Pa)
Depth (km)
W. Kunlun
Potassic basic volcanics (shoshonite series)
43.17
0.62
25.8
85.1
Dahongliutan,W
Kunlun
Potassic basic volcanics (shoshonite series)
44.89
0.65
22.5
74.3
Lixian, Gansu
Potassic basic volcanics (shoshonite series)
38.65
0.65
33.0
108.9
Note: Qinghai-Tibet Plateau has been investigated for many years.
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表内尽可能设置成“无边框”
。比较复
杂的表可以留一些必要的内框线。
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Fig.1. Schematic map showing the geological and geophysical investigation area.
ALT: Altun strike-slip fault; GD: Gangdise; QL: Qilian Mts.; HIM: Himalayas; HX: Hoh Xil; YZS: Yarlung Zangbo Suture; MBT; Main
Boundary Thrust; MCT: Main Central Thrust; MMT: Main Mantle Thrust.
在中国首次发现的水硒铁石
H. E. Belkin (美国地质调查所，国家中心信箱 956 号，雷斯顿，维吉尼亚州 20192-0001，美国; 电子邮箱：
hbelkin@usgs.gov)
郑宝山、朱建明 (中国科学院
地球化学研究所环境地球化学国家重奌实验室，贵州
贵阳 550002，中国)
摘要: 本文描述在中国首次发现的少见矿物水硒铁石 (Fe3+2Se3O9 · 6H2O)。它产于湖北省西南部恩施市以东
的渔塘坝村，属于下二迭系马口组的碳质页岩里。此页岩富含硒，并含有自然硒、含 V-Mo-Cr 的氧化铁、
粘土、及石英。基岩里的硒，在含三价铁的中等或高氧化度的情况下，风化而形成水硒铁石。
关键词: 水硒铁石, 硒，碳质页岩(石煤)，湖北，中国
线宽：1.5 磅
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