| 广东长坑金银矿床的成矿流体地球化学 |
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| 引用本文： | 张生,李统锦,王联魁.广东长坑金银矿床的成矿流体地球化学[J].矿物学报,1998(1). |
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| 作者姓名： | 张生 李统锦 王联魁 |
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| 作者单位： | 中国科学院广州地球化学研究所!广州，510640，中国科学院广州地球化学研究所!广州，510640，中国科学院广州地球化学研究所!广州，510640 |
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| 基金项目： | 中国科学院黄金办科研基金，中科院博士点基金 |
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| 摘 要： | 长坑金银矿床的流体包裹体以单相液体和两相气液包裹体为主，气体和气液包裹体共存反映流体曾发生沸腾作用。成矿流体的温度为300～170℃，压力为20×106～45×106Pa，属于中-低盐度、较高密度的弱改-弱碱性热液。成矿流体的总硫浓度为10-5～10－2m数量级，氧逸度和疏逸度分别为lgfo2=－32~－50和lgfs2=－10~-20。早期流体为K－Ca－CI型，后期演化为Ca－Na－CI型，流体成分有别于典型的现代海底热液（热水）。
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| 关 键 词： | 流体包裹体 成矿流体 金银矿床 广东 |
GEOCHEMISTRY OF ORE-FORMING FLUIDS OF CHANGKENG GOLD-SILVER DEPOSIT,GUANGDONG PROVINCE,CHINA |
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| Zhang Sheng, Li Tongjing, Wang Liankui.GEOCHEMISTRY OF ORE-FORMING FLUIDS OF CHANGKENG GOLD-SILVER DEPOSIT,GUANGDONG PROVINCE,CHINA[J].Acta Mineralogica Sinica,1998(1). |
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| Authors: | Zhang Sheng Li Tongjing Wang Liankui |
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| Abstract: | There are mainly two types of fluid inclusions,i. e.,mono-phase liquid type and liquid-dominated two-phase type,in the Changkeng gold-silver deposit,in addition to minor gas-type in-clusions coexisting with liquid-dominated-type inclusions,which reflects boiling of the ore-formingfluids- The temperatures and pressures of mineralizing fluids which are weakly acid to weakly ba-sic solutions with moderate-low salinities and relatively high densities range from 3OO'Cto 17OCand from 2O to 45 MPa, respectively. The concentration of total sulfur in the ore~forming solutionsis on the 10-5-10 -2 magnitude order, while logfo2= - 32~ - 50 and logfs2: =-1O~- 20. Themineralizing fluids are of the K-Ca-Cl type in the early stage,f ol1owed by the evolution into the Ca-Na-Cl type during the late stage,whose compositions are significantly different from those of thetypical hydrothermal solutions in modern sea floor. |
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| Keywords: | fluid inclusion ore-forming fluid gold-silver deposit Guangdong |
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