摘要
平江万古金矿床,成矿物质来源于容矿地层中元古界冷家溪群坪原组,矿床继承了容矿地层富As、Sb、W等微量元素的特点,成矿流体为与区域浅变质作用有关的HCO_3--Cl--Na ̄+-Ca ̄(2+)型建造水热液,成矿过程中Au主要以AuAsS_2、AuAsS_3 ̄(2-)络合物形式迁移,矿床形成于中一低温,弱碱性、还原环境。
Ore-forming material of Wangu gold deposit in Pingjiang comes from ore-storing stratum,Ping-yuan formation of Mid-proterozoic Lengiiaxi group.The deposit inherits the characteristics of ore-stor- ing stratum rich in As,Sb and W. Ore-forming solution is HCO_3--Cl--Na ̄+-Ca ̄(2+) type formation thermal water related to regional metamorphism. In the process of mineralization, Au migrates mainly in complex forms of AuAsS_2 and AuAsS_3 ̄(2-) .The deposit forms under the circumstance of middle-low temperature,weak alkali and reduction.
出处
《湖南地质》
1994年第2期83-90,共8页
Hunan Geology
关键词
金矿床
地球化学
成矿物质
gold deposit,geochemistry,wangu,Pingjiang