大湖塘矿集区地处扬子陆块—下扬子地块东南缘，钦杭（钦州—杭州）复合造山带中段北侧。区内出露基岩大多数为晋宁期黑云母花岗闪长岩（九岭岩基主体部分），少数为新元古界双桥山群浅变质细碎屑岩（九岭岩基残余顶盖）以及燕山期斑状花岗岩、细粒花岗岩和花岗斑岩。本文在综合研究区域地质、矿床地质成果基础上，分析了该区燕山期构造—岩浆的活动规律，厘定了成矿岩体；运用构造解析的原理分析了该区燕山期构造—岩浆—成矿之间的关系，构建了燕山期构造—岩浆热液成矿作用模式。认为该区特大型钨铜多金属矿的形成与燕山期构造－岩浆热液成矿系统的发生、发展、演化具有密切的成生联系，其中成矿构造与成矿结构面是成矿作用的基础，成矿岩体是成矿作用的关键。成矿是成矿岩体与成矿构造、成矿结构面三位耦合的结果。%Objectives:The Dahutang tungsten—copper—polymetallic ore concentration area is located on the north side of the central Qinzhou—Hangzhou (Qin-Hang ) composite orogen,southeastern margin of Yangtze plate.Most exposed bedrocks in the area are the Jinning Period (Neoproterozoic)biotite granodiorite(mainbody of the Jiuling batholith),a few are low metamorphic fine elastic rocks of the Neoproterozoic Shuangqiaoshan Group(residual cap of the Jiuling Batholith),porphyritic granite,fine grained granite and granite porphyry of Yanshanian period. Methods:Based on the research results of comprehensive regional geological structure,this paper uses the principle of structural analysis to analyze the Yanshanian tectono—magma—mineralization in Dahutang Mining Area. Results:It is concluded that the super large tungsten—copper polymetallic ore-forming in this area is closely associated with the occurrence, development and evolution of Yanshanian tectonic- magmatic hydrothermal mineralization system,among which metallogenic structure and metallogenic structural surface are the basises of mineralization,and the metallogenetic rock body is the key to mineralization. Conclusions:Mineralization is the coupling results of metallogenic structure,metallogenic structural surface and metallogenetic rock body.
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