| 杨宗文,刘灵.贵州镇远小溪铅锌矿床地球化学特征及其成因探讨[J].贵州地质,2014,31(4):252-255266 |
| 贵州镇远小溪铅锌矿床地球化学特征及其成因探讨 |
| Geochemical Characteristics and Its Genesis of Xiaoxi Lead-zinc Deposit in Qingzhen of Guizhou |
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| DOI： |
| 中文关键词: 矿床地球化学 成因探讨 同位素铅锌矿床 贵州镇远 |
| 英文关键词:Deposit geochemistry Genesis Lead-zinc deposit Xiaoxi of Zhenyuan |
| 基金项目:贵州省地矿局资助科研项目《贵州省黔东铅锌矿控矿条件及找矿方向》。 |
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| 中文摘要: |
| 通过对镇远小溪铅锌区域地质、矿床地质特征的分析,开展了矿床碳、氧、硫同位素及包裹体的地球化学研究及成因探讨。脉石矿物白云石的碳同位素为-0.1‰2.1‰,氧同位素为18.3‰19.2‰,闪锌矿的硫同位素为32‰35‰,同位素分析结果主要落在海相沉积碳酸盐区间范围,分析成矿物质可能与海相碳酸盐岩沉积地层有关；闪锌矿的流体包裹体的均一温度为156180℃,盐度为922.8 wt% NaCl eq,显示该矿床的成矿流体为低温、中高盐度特征。 |
| 英文摘要: |
| By analysis the characteristics of regional geology and mineral deposit of Xiaoxi lead-zinc deposit, the C, O and S isotope and geochemistry of inclusion are studied and the genesis is discussed. The isotope analyses shows the C isotope of wall rock dolomite is -0.1‰ to 2.1‰, the O isotope is 18.3‰ to 19.2‰, the S isotope of sphalerite is 32‰ to 35‰. The analytical results of C, O and S isotope mainly in the sea facies sedimentary carbonate zone, it shows the mineral resources of Xiaoxi deposit comes from sea facies carbonate sedimentary stratum. The fluid inclusion microthemometry of gangue mineral calcite and ore mineral sphalerite shows the homogeneous temperature is 156℃ to 180℃, the salinity is 9 to 22.8wt% NaCl eq, the mineral fluid is low temperature and middle-high salinity. By analysis the regional ore-control structure and geological characteristics, it’s thought Xiaoxi lead-zinc deposit is MVT-typed deposit which related to geothermal brine activity. |
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