Fluid Inclusion Study of Fluorite Deposits in Linxi Region, Inner Mongolia
详细信息
- 责任者：Zeng Zhaofa (School of Earth Sciences and Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Cao Huawen
- 刊名：Geochimica
- 出版年：2013
- 卷期：42(1)
- 关键词：萤石矿床 ; fluorspar deposit ; 流体包裹体 ; fluid inclusions ; 内蒙古 ; Inner Mongolia
- 页码：p.73-81
- 图表：illus., 2 tables, 22 refs.
- 分类号：1002
- issnNo：ISSN0379-1726
- isbnNo：CN44-1398/P
摘要
Linxi region,Inner Mongolia,is one of the most important fluorite ore districts in eastern China.Studies on four fluorite deposits show that fluid inclusions are mostly liquid inclusions,with a few gas inclusions and few daughter mineral-bearing multiphase inclusions.Microthermometry results show that homogenization temperature of ore-forming fluid concentrates between 140–270 ℃;whereas salinity ranges from 0.18% to 4.65%NaCleqv;and density ranges from 0.61 to 0.95 g/cm3.The ore-forming fluid belongs to NaCl-H2O fluid system,which is characterized by middle-low temperature,low salinity and low density.The compositions of fluid inclusions are mainly H2O,with some H2and C3H6.Microthermometry results suggest that water-rock reaction is the principal mechanism of fluorite precipitation.According to the geologic feature and the low homogenization temperature and salinity,these fluorite deposits are characterized by hydrothermal origin of meteoric water.The fluorite deposits belong to middle-low temperature hydrothermal type deposit.
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