摘要
通过野外调查采样和测试分析,对贵州黔东镇远金堡铅锌矿床开展碳、氧、硫同位素地球化学特征等进行研究,方解石和白云石碳同位素在-5.7‰^-6.9‰,落在典型的火成碳酸岩区域(-5‰^-7‰);氧同位素在11.2‰~12.2‰之间,略高于火成碳酸岩,预示火成碳酸岩物质经过低温蚀变造成氧同位素偏高。闪锌矿硫同位素分布较为集中,在11.5‰~14.2‰之间,结合该区域的碳同位素,暗示成矿物质来自于深部地幔或岩浆作用。通过碳-氧稳定同位素示踪分析,结合区域地质条件及矿床地质特征研究,认为金堡铅锌矿成矿热液与岩浆作用有关,
Through field investigation, sampling and testing analysisof the Jinbao lead-zinc deposit in Zhenyuan County, Guizhou Province, China, geochemical characteristics of C, O and S isotopes were studied. The δ13C of calcite and dolomite samples range from-5.7‰ to-6.9‰ and-5‰ to-7‰ in the typical igneous carbonatite area, the δ18O are 11.2‰ to 12.2‰, higher than those of carbonatite, indicating that low temperature alteration increase O isotope of carbonatite. Sphalerite shows an intensive S isotope distribution of(11.5‰ to 14.2‰). According to the C isotopes found, the mineral resource may come from deep in the mantle or through magmatism. By doing stable C-O isotopes tracer analyses together with the geological conditions of the study area and characteristics of the deposit, it is surmised that ore-forming hydrothermal fluids had some relation with magmatism.
出处
《矿物学报》
CAS
CSCD
北大核心
2015年第2期147-153,共7页
Acta Mineralogica Sinica
基金
贵州省地矿局科研项目(黔地矿科[2011]01号)
973计划(2014CB440904)
关键词
稳定同位素
成矿流体
镇远金堡铅锌矿
stable isotope
Ore-forming fluid
Jinbao lead-zinc deposit
