地质科学2011，Vol.46Issue(2)：549-558,10.
西藏尤卡朗铅银矿床流体包裹体研究
Fluid inclusions of Youqialang lead-silver deposit in Tibet
王涛 1赖健清 2冯志兴 1宋学军3
作者信息
- 1. 中南大学地学与环境工程学院,长沙410083
- 2. 青海西部矿业地质勘查有限责任公司,西宁810016
- 3. 有色金属成矿预测教育部重点实验室,长沙410083
- 折叠
摘要
Abstract
The Youqialang lead-silver deposit in Tibet is located in Gandise-Nyainqentanglha range Mesozoic magmatic arc, in the south of Bangonghu-Nujiang junction belt and north of Yaluzangbu River junction belt. Its ore-bearing strata are quartzite on the top of Lagongtang Formation of Upper Jurassic. The orebodies are controlled by structural fractures. Quartz in orebearing veins contains two types of fluid inclusions, they are aqueous inclusions( Type Ⅰ ) and H2O-CO2 inclusions (Type Ⅱ ). According to the range of their homogenization temperatures ( 160 ℃ ～250 ℃ ) ,we inferred that the ore-forming temperature of the deposit was mesotherm.The salinity ranges from 1.65％ ～ 12. 29％ ,and its peak value ranges from 3％ ～5％. Part of the data with higher salinity reflects that the source of high-salinity magmatic hydrothermal fluids is mixed by heated groundwater in the later period. The composition of the hydrotherm changed due to the inburst of thermal groundwater, which is an important factor of mineralization. Ore-forming fluids also contain CO2, which promoted the deposition of lead and zinc sulfide.关键词
流体包裹体/均一温度/盐度/尤卡朗铅银矿床/西藏Key words
Fluid inclusions/ Homogenization temperature/ Salinity/ Youqialang leadsilver deposit/ Tibet分类
天文与地球科学引用本文复制引用
王涛,赖健清,冯志兴,宋学军..西藏尤卡朗铅银矿床流体包裹体研究[J].地质科学,2011,46(2):549-558,10.
