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156 180℃,盐度为9 22.8 wt%Na Cl eq,显示该矿床的成矿流体为低温、中高盐度特征。
By analysis the characteristics of regional geology and mineral deposit of Xiaoxi lead-zinc de- posit, 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%o to 2.1%0, the O isotope is 18.3%o to 19.2%o, the S isotope of sphalerite is 32%0 to 35%0. 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% NaC1 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.
出处
《贵州地质》
2014年第4期252-255,266,共5页
Guizhou Geology
基金
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>
