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| 贵州水银洞金矿床成矿物理化学条件及金的迁移和沉淀 | |
| 引用本文： | 肖德长,李葆华,硕雪祥,徐仕海,付绍洪,陈翠华,董树义.贵州水银洞金矿床成矿物理化学条件及金的迁移和沉淀[J].物探化探计算技术,2012,34(1):73-79. |
| 作者姓名： | 肖德长 李葆华 硕雪祥 徐仕海 付绍洪 陈翠华 董树义 |
| 作者单位： | 1. 成都理工大学地球科学学院,成都,610059 2. 中国地质大学地球科学与资源学院,北京,100083 3. 中国科学院地球化学研究所,贵阳,550002 |
| 基金项目： | 国家自然科学基金（40873036,40772060）;国家自然科学重点基金（40930423） |
| 摘 要： | 对水银洞金矿床流体包裹体开展了研究和热力学计算,解析了该矿床成矿物理化学条件及金的迁移形式和沉淀机制。研究表明:金的主成矿温度为215℃～267℃,压力28.5MPa～37.2MPa;成矿流体具弱酸性(pH=4.312)、还原性(fO2﹤10-35.315×105 Pa)。金在成矿溶液中主要以AuHS0等络合物形式进行迁移,HS-活度和氧逸度降低以及pH值升高是促使金沉淀的主要机制。 |
| 关 键 词： | 水银洞金矿床 流体包裹体 迁移和沉淀 成矿流体 |
PHYSICAL-CHEMICAL CONDITIONS OF MINERALIZATION AND THE TRANSPORTION AND DEPOSITION OF AU IN SHUIYINDONG GOLD DEPOSIT,GUIZHOU PROVINCE |
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| Institution: | XIAO De-chang1,LI Bao-hua1,GU Xue-xiang2,et al.(1.College of Earth Sciences,Chengdu University of Technology,Chengdu 610059,China;2.College of Earth Sciences and Mineral Resources,China University of Geosciences,Beijing 100083,China) |
| Abstract: | Based on the research of fluid inclusions and thermodynamics calculate in shuiyindong gold deposit,we have studied the physical-chemical conditions of mineralization,and the transportation form and deposition mechanism of the deposit.The research shows that the main temperature of gold mineralization is 215℃~267℃,and the pressure is 28.5MPa~37.2MPa;the ore-forming fluid with characteristics of weak acidity(pH=4.312),reducibility(fO2﹤10-35.315×105 Pa);AuHS0 is the main transportation form of Au in the ore-forming solution;the main deposition mechanisms of Au are the decrease in the activity of HS-and fO2 and an increase in pH values. |
| Keywords: | shuiyindong gold deposit fluid inclusions transport and deposition ore-forming fluid |
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