Geochemical characteristics and source of ore-forming fluid of Duolanasayi gold deposit, Xinjiang

被引:0
作者
Xiao Huiliang
Zhou Jiyuan
Wang Henian
Dong Yongguan
Ji Junfeng
Zhao Yu
机构
[1] Nanjing University,State Key Laboratory for Mineral Deposits Research, Department of Earth Sciences
[2] Nanjing Institute of Geology and Mineral Resources,undefined
来源
Chinese Journal of Geochemistry | 2003年 / 22卷 / 1期
关键词
fluid inclusion; geology; geochemistry; gold ore deposit; Duolanasayi; Xin-jiang;
D O I
10.1007/BF02831547
中图分类号
学科分类号
摘要
The Duolanasayi gold deposit, 60 km NW of Habahe County in Xinjiang, is a medium-large scale gold deposit controlled by the coupled ore-forming processes involving brittle-ductile shearing, albitite veins, and post-stage magma solution. Fluid inclusion studies indicate that the homogenization temperatures range from 160°C to 315°C with the peak values of 220–300°C. Mineralization pressures are from 21.0 MPa to 64.5 MPa. Ore fluid inclusions contain Ca2+, K+, Na+, Mg2+; HCO3-, SO42-, HS-, F-, Cl- and Au+ (maximum: 5.3 × 10-6), and the mineralizing fluid is a H2O-CO2 system. Sulfur, hydrogen, oxygen and strontium isotopic compositions [graphic not available: see fulltext][graphic not available: see fulltext] suggest that the ore-forming fluid is the mixture of magmatic water, meteoric water, metamorphic water and formation water sealed in rocks and strata. It is mainly magmatic water in the early stage, and mixing fluid of water, meteoric water, metamorphic water and formation water that occurred in rocks and strata in the major mineralization stage. The ore-forming materials were derived from the upper mantle or lower crust.
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页码:74 / 82
页数:8
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