湘西沃溪金锑钨矿床矿化蚀变作用机理

Studies of Mechanism of Woxi Au-Sb-W Deposit in Western Hunan

矿床成矿流体富含矿化剂和Au、Sb、W、As和Ag等重金属元素。矿床的矿化蚀变作用分为热液初期和热液期。热液初期成矿流体引起围岩强烈蚀变,热液期发生W、Sb、Au的矿化作用.成矿流体中的主要组分、矿化剂、fo_2、fs_2、fco_2、pH、Eh、盐度、压力等因素都起着非常重要的作用.

Ore-forming fluid contains large amount of mineralizing agents and a lot of heavy metal elements. The mineralization of the deposit can be divided into two periods. Former ore-forming deriod caused serious alteration of the wallrocks, and the ore-forming fluid are mainly composed of gas and liquid. Ore-forming period caused W, Sb and Au mineralization. The main components, mineralizing agents, fo2 、fS2、 fco2、 pH、 Eh、 temperature and pressure of the ore-forming fluid played an important role in the mineralization.