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湘西金 -锑 -钨矿产于晚元古代紫红色板岩——马底驿组。该组以富含 Fe2 O3 ,局部富含 Ca O为特征 ,可能作为地球化学障控制着本区矿床及矿化的分布。湘西金矿中主要控矿要素为 :构造、地层及主要成矿元素络合物的地球化学性质。金以 Au(HS) -2 形式搬运 ,其沉淀主要由紫红色板岩的氧化作用而形成的黄铁矿化引起。钨以 WO-4 和 HWO4 形式存在 ,温度的降低及局部富钙围岩的存在控制着其沉淀。锑不仅以 Sb(OH) 03 ,而且以 Sb S-2 和 Hn Sb Sn-24 (n=0 ,1或 2 )的形式存在 ,其沉淀成矿主要由温度的降低所控制。预测在— 510 m标高及其以下 ,只要有紫红色板岩存在 ,在构造有利处 ,金矿化将继续存在 ,而钨、锑矿化将会逐渐尖灭。
The Xiangxi gold-antimony-tungsten mineral was produced in the late Proterozoic purplish red slate-Madianye formation. This group is characterized by Fe2 O3 enrichment and locally CaO enrichment, which may control the distribution of ore deposits and mineralization in this area as a geochemical barrier. The main ore-controlling elements in the Xiangxi gold deposit are the geochemical characteristics of the structures, strata and the complexes of the major ore-forming elements. Gold is transported in the form of Au (HS) -2 and precipitates are caused by pyrite formation, which is mainly caused by the oxidation of fuchsia slate. The presence of tungsten in the form of WO-4 and HWO4, the temperature is reduced and the presence of local calcium-rich surrounding rock control its precipitation. Antimony exists not only in the form of Sb (OH) 03, but also in the form of Sb S-2 and Hn Sb Sn-24 (n = 0, 1 or 2). It is predicted that at the elevation of 510 m and below, as long as the purple slate exists, the gold mineralization will continue to exist and the mineralization of tungsten and antimony will be gradually extinguished.