浅析李坝金矿26号矿带围岩蚀变及其成矿关系
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摘要
李坝金矿位于甘肃南部,矿带围岩蚀变的主要种类有黄铁矿化、绢云母化、硅化,次要种类有绿泥石化、白云母化、碳酸盐化、毒砂化等。矿化发育于蚀变带中,在空间上与蚀变带基本吻合,矿化程度的高低与蚀变的强弱呈正相关。与矿化关系最为密切的蚀变为:微细浸染状黄铁矿化、致密块状绢云母化、浸染状硅化。矿化带的宽度,一般均小于蚀变带的宽度。
Liba gold deposit is located in the south of Gansu Province. The main types of wall rock alteration are pyritization, sericitization and silicification, and the secondary types are chloritization, muscovitization, carbonation and arsenopyritization. Mineralization occurs in altered zones and basically coincides with altered zones in space. The degree of mineralization is positively correlated with the intensity of alteration. The most closely related alterations are microdisseminated pyritization, dense massive sericitization and disseminated silicification. The width of mineralization zone is generally smaller than that of alteration zone.
Liba gold deposit is located in the south of Gansu Province. The main types of wall rock alteration are pyritization, sericitization and silicification, and the secondary types are chloritization, muscovitization, carbonation and arsenopyritization. Mineralization occurs in altered zones and basically coincides with altered zones in space. The degree of mineralization is positively correlated with the intensity of alteration. The most closely related alterations are microdisseminated pyritization, dense massive sericitization and disseminated silicification. The width of mineralization zone is generally smaller than that of alteration zone.
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