溆浦地区脉金矿地球化学特征

岩、矿石物质成分的交换和转移特征可为成矿作用机理提供信息。区域、矿区及矿化蚀变带岩石化学成分、微量元素、稀土元素及氧、硫同位素组成研究表明:溆浦地区脉金矿成矿流体为变质热液,成矿物质来源于地层。在变质分异和成矿化学分异作用下,成矿流体溶解地层中的成矿物质,经扩散、渗滤等方式运移到构造有利部位沉淀成矿。

GEOCHEMICAL FEATURES OF THE VEIN GOLD DEPOSITS IN XUPU AREA

The exchange and transference of components between ore and rock can provide information about the mechanism of mineralization. According to the studies on the chemical composition, trace element and rare earth element composition, oxygen and sulfur isotope composition of rocks and ores in the surrounding region, ore district and the mineralized alteration zones, it is concluded that the ore-forming fluid of the vein gold deposits in Xupu area is metamorphic fluid; the ore-forming material comes from the strata. In the process of metamorphic differentiation and ore-forming chemical differentiation, the fluid dissolves the ore-forming materials from the strata and migrates to favourite structural spaces through diffussion and infiltration, where the ore-forming materials precipitate from the fluid and form ore deposits.