| 吉林正岔铅锌矿床成矿流体地球化学 |
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| 引用本文：李荫清.1993.吉林正岔铅锌矿床成矿流体地球化学[J].地球学报,14(3):27-38. |
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| 中文摘要:详细的流体包裹体研究表明．正岔矿床矿物中流体包裹体十分丰富．主要有G型富气体包裹体、P型多相包裹体和F型两相气液包裹体。矽卡岩阶段(尤其是早期)以发育P型包裹体为特征，其内子晶种类多、体积大；成矿高峰期的石英-硫化物阶段F型包裹体最多，少数G型；成矿晚期石英-方解石阶段包裹体数量少，主要为气液比小的富液相包裹体．通过包裹体的低温试验和成分分析得出，本区成矿液体有两类：①高温度、高盐度、高密度含CaCl3、MgCl3、KCl的NaKCl-H2O溶液，来自岩浆热液；②低温度、低盐度、低密度NaCl-H2O溶液，来自大气降水．成矿早期以岩浆热液为主；晚期大气降水占优势。成矿作用温度范围为180-640℃；矽卡岩阶段为280-640℃,成矿的最佳温度为260-400℃。成矿压力为5-20MPa，当流体沸腾、盐度为7-12WNaCl%、密度为0．5-0．8(g／cm^3)时对成矿最有利。 |
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| GEOCHEMISTRY OF THE MINERALIZING FLUID IN THE ZHENGCHA LEAD AND ZINC DEPOSIT, JILIN PROVINCE, CHINA |
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| Abstract:The Zhengcha lead and zinc deposit in the northwest part of Ji'an City, Jilin Province, is located at the north-east limb of the north-west trending Xiamenggou-Sidaoyangcha megaanticline, i.e. near the hinge end of the Zhengcha nearlycomplex recumbent fold. The outcroping strata in this ore district are the graphite-bearing rock series of the Huangchagou Formation, Jian Group, Lower Proterozoic Suberathem. The distribution of the ore bodies os controlled by certain strata. |
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