摘要
巴斯湖铅锌矿床位于三江北带西延部分,大地构造属于羌塘地块。本次选择脉石矿物方解石中原生流体包裹体进行研究测试,结果表明:方解石中包裹体以气液两相包裹体为主,主成矿温度为140~210℃、盐度变化范围为4%~11%NaCl,流体密度为0.93~0.98 g/cm^3,深度介于1.25~2.3 km,成矿流体呈现低温、中低盐度、中浅层相的矿床成矿环境特征。结合区域成矿背景、矿床地质特征及流体包裹体特征,巴斯湖铅锌矿床成因类型应为低温热液脉型铅锌矿床。
The Basihu Pb-Zn deposit is located in the Northern section of the West extension of the Sanjiang metallogenic belt. The earth structure belongs to the Qiangtang terrane. On the basis of filed geological observation,we have carried out inclusion temperature study of calcite on the gangue minerals. The results shows the gas-liquid phase inclutions is the major tape of calcite. The main metallogenic temperature range is 140 ~ 210℃,salinity range is 4% ~ 11% NaCl,fluid density is 0. 93 ~ 0. 98 g/cm^3,depth is between 1. 25 ~ 2. 3 km. The characteristics of the ore-forming fluid show that the ore mineralization was took place under shallow depth via ore-forming fluids of the low temperature,low salinity,combining with the characteristics of regional ore-forming background,deposits geology and fluid inclusion. We propose that the Basihu Pb-Zn deposit belongs to the hypabyssal low temperature and hydrothermal type Pb-Zn deposits.
作者
董峻麟
孙丰月
孙永刚
姚振
王利军
DONG Junhn;SUN Fengyue;SUN Yonggang;YAO Zheng;WANG Lijun(College of Earth Science, Jilin University, Changehun, Jilin 130061, China;The Fifth Institute of Qinhai Geological and Mineral Exploration Institute, Xining, Qinghai 810012, China)
出处
《中国锰业》
2018年第2期40-44,61,共6页
China Manganese Industry
基金
青海省柴达木周缘及邻区成矿带地质矿产调查评价项目(资[2012]03-001-104)
关键词
巴斯湖铅锌矿床
流体包裹体
低温热液脉型铅锌矿床
Basihu Pb -Zn deposit
Fluid inclusion
Low temperature and hydrothermal type Pb -Zn deposits
