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。
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.
出处
《物探化探计算技术》
CAS
CSCD
2012年第1期73-79,2,共7页
Computing Techniques For Geophysical and Geochemical Exploration
基金
国家自然科学基金(40873036
40772060)
国家自然科学重点基金(40930423)
关键词
水银洞金矿床
流体包裹体
迁移和沉淀
成矿流体
shuiyindong gold deposit
fluid inclusions
transport and deposition
ore-forming fluid
