| 杨子地台北缘中段中上元古界中金矿床成矿物理化学条件研究 |
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| 引用本文： | 汪东波.杨子地台北缘中段中上元古界中金矿床成矿物理化学条件研究[J].石家庄经济学院学报,1992(6). |
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| 作者姓名： | 汪东波 |
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| 作者单位： | 中国有色金属工业总公司北京矿产地质研究所 |
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| 摘 要： | 通过对区内产于中上元古界中三类主要金矿床的矿物学、同位素地球化学和流体包裹体地球化学研究,本文分别给出了各类金矿床成矿流体的温度(T)、压力(P)、酸碱度(pH)、氧逸度(fo_2)、硫逸度(fs_2)、盐度ws、压力、密度(ρ)和流体的化学组成类型及各种组份的浓度。热力学计算表明:在成矿流体中金主要以硫金络合物的形式迁移,温度、压力、氧逸度和配体浓度的降低及pH的改变是引起金沉淀的主要因素。
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Studies on Ore-forming Physico-chemical Condition of Gold Deposits in Middle-Upper Proterozoic Suberathem in the Middle section of the Northern Margin of yangtze Platform |
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| Wang Dongbo Beijing Research Institute of Mineral Resources and Geology,China National Non-ferrous Metals Industrial Corporation.Studies on Ore-forming Physico-chemical Condition of Gold Deposits in Middle-Upper Proterozoic Suberathem in the Middle section of the Northern Margin of yangtze Platform[J].Journal of Shijiazhuang University of Economics,1992(6). |
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| Authors: | Wang Dongbo Beijing Research Institute of Mineral Resources and Geology China National Non-ferrous Metals Industrial Corporation |
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| Abstract: | Through studies on mineralogy, isotope geochemistry and fluid-inclusion geochemistry of three types of gold deposit in Middle-Upper proterozoic suberathem in the area, ore-forming temperature (T). Ore-forming pressure (P). pH. oxygen fugacity (fo_2), sulfurl fugacity (fs_2), salinity (Ws). density (p) and chemical components and cone(?)ntration of ore-forming fluid have been given in this paper. Thermodynamics caculation shows that thio-complex of gold probabely is cheif transport form in ore-formin fluid. Decrease in temperature, pressure, oxygen fugacity and concentration of coordinative species and variation of pH are main factors which result in deposition of gold in Ore-forming fluid. |
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| Keywords: | physico-chemical condition yangtze platform gold deposit temperature pressure salinity density oxygen fugacity sulfurl fugacity transport form deposition fluid-inclusion pH |
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