SULFUR ISOTOPE FEATURES OF CU-AU POLYMETALLIC DEPOSITS IN THE HONGLIUGOU-LAPEIQUAN AREA ON THE NORTHERN MARGIN OF THE ALTYN TAGH MOUNTAINS AND THEIR RELATION TO THE TECTONIC EVOLUTION

LI Yue-chen; CHEN Bai-lin; CHEN Bai-lin; CHEN Zheng-le

Volume 13 Issue 2

Jun. 2007

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Article Navigation > Journal of Geomechanics > 2007 > 13(2): 131-140

LI Yue-chen, CHEN Bai-lin, CHEN Bai-lin, et al., 2007. SULFUR ISOTOPE FEATURES OF CU-AU POLYMETALLIC DEPOSITS IN THE HONGLIUGOU-LAPEIQUAN AREA ON THE NORTHERN MARGIN OF THE ALTYN TAGH MOUNTAINS AND THEIR RELATION TO THE TECTONIC EVOLUTION. Journal of Geomechanics, 13 (2): 131-140.

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SULFUR ISOTOPE FEATURES OF CU-AU POLYMETALLIC DEPOSITS IN THE HONGLIUGOU-LAPEIQUAN AREA ON THE NORTHERN MARGIN OF THE ALTYN TAGH MOUNTAINS AND THEIR RELATION TO THE TECTONIC EVOLUTION

1.
Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, Guangdong
2.
Xinjiang Resource and Environment Center, ǜrǜmqi 830000, Xinjiang, China
3.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081

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Received: 2007-02-16
Published: 2007-06-01

Abstract

Abstract

The northern margin of the Altyn Tagh Mountains is one of the important metallogenic provinces recently found in northwestern China.Based on the sulfur isotope study of Cu-Au polymetallic deposits in the area, combined with the geological characteristics of the mineral deposits, the authors consider that there are mainly three genetic types of Cu-Au polymetallic deposit in the area:stratified submarine volcanic-sedimentary type Cu-polymetallic deposits, ductile shear zone type gold (Cu) deposits and lode magmatic hydrothermal type Cu-Au polymetallic deposits controlled by structural fractures.According to the characteristics of the tectonic evolution, the authors discuss the relation between the deposit genetic types and stages of tectonic evolution.Three mineralization stages may be distinguished.The first stage was a period of sea-floor spreading in the early-mid Early Paleozoic, forming submarine volcanic-sedimentary type Cu-polymetallic deposits represented by the Kaladawan copper deposit.The second stage was a period of plate convergence and collision in the mid-late Early Paleozoic, forming ductile shear zone type (dynamometamorphic hydrothermal type)(copper-) gold deposits represented by the Dapinggou and Hongliugou gold deposits.The third stage was a period of magmatic activity and brittle faulting after plate collision at the end of the Early Paleozoic, forming lode magmatic hydrothermal type copper-polymetallic deposits controlled by fractures, as exemplified by the Xorkol Beishan and Lapeiquan deposits.Based on an analysis of the sulfur isotope features and the genetic types of the copper-gold deposits and their relation to the tectonic evolution, the authors suggest that this area has favorable prospects for copper-gold polymetallic deposits.
- sulfur isotope,
- Cu-Au polymetallic deposit,
- genetic type,
- tectonic evolution,
- northern margin of the Altyn Tagh Mountains

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References(22)

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