安徽省铜陵矿集区区域成矿模式

安徽省铜陵矿集区矿床类型主要有矽卡岩型、沉积改造型、斑岩型、风化淋滤型。矽卡岩型是本区主要的矿床类型,根据其成矿特点可进一步分为:层控式、复合式、接触式、裂控式、角砾岩筒式。矿床(体)主要赋存在3个层位(C2h+C2P1c,P2+P3,T1),"三位"结构特征明显。中酸性岩浆岩、层间滑脱构造、有利成矿的碳酸盐地层是本区重要的成矿条件。文章在总结前人成果资料的基础上,建立了本区区域成矿模式,提出了含矿岩浆"螺旋(左旋)式"上升从而形成"多层楼"式矿床的理论,并据此预测位于深部的奥陶系碳酸盐地层成矿的可能性。

Regional metallogenic model in Tongling ore cluster area, Anhui Province

The main ore deposit types in Tongling ore cluster area are skarn type,sedimentary reformation type,porphyry type and weathered-eluvial type.The skarn type is the most important ore deposit type in this area.According to their metallogenic characteristics,they can be further divided into strata-bound type,combined type,contact type,crack-controlled type and breccia pipe type.The main orebody occurs in three horizons(C2h+C2P1c,P2+P3,T1),and the structural feature of three horizons is obvious.The important metallogenic conditions in this area are neutral-acid carbonates,interlayer detachment structure,carbonate formation favorable to mineralization.Based on the existing study results,the metallogenic model of this area is built up,the theory that the ore magma rises in "screw type(left screw)" and consequently forms "multilayer building model" is put forward.On the basis of this theory,the metallogenic possibility of the carbonate formation of the Ordovician System can be predicted.