甘肃格尔托金矿床控矿因素及富集条件

Ore controlling factors and enrichment condition analyse of Geertuo gold deposit in Gansu

西秦岭地区,构造、岩浆活动发育,成矿地质条件优越,是我国微细浸染型金成矿集中区,具有较好的找矿前景。格尔托金矿属微细浸染型金矿床,宏观上受三叠系地层控制,矿体就位于断层带内部或与闪长岩脉相伴。围岩蚀变为硅化(似碧玉岩化)、绢云母化、碳酸盐化和绿泥石化。主要矿化为褐铁矿化、赤铁矿化和黄铁矿化。金的成矿与硅化、赤铁矿化关系密切,是强烈的矿化地段和金矿体富集部位,也是重要的找矿标志。

In Western Qinling Mountain area, tectonic-magmatie activity development, the metallogenic geological conditions are predominant, where is micro-disseminated gold deposit concentration area in China and has a good prospecting, Geertuo gold mine is a micro-disseminated gold deposits which controled by Triassic strata macroscopically, ore body is located within the fault zone or accompanied by diorite dykes. The wall rock alterations are silieification, sericitzation （jasperoidization）, carbonation and chloritization, the main mineralization are limonitization, hematitization and pyritization. Close correlation is existed amang Gold mineralization,silicification and hematitization where is intense mineralization area and enrichment position of gold mine and are also important indicators for prospecting.