福建省武夷山江墩铅锌矿区推覆构造地质特征  

Geological Feature of Nappe Tectonic in Jiangdun Lead-zinc Mining area,Wuyishan City,Fujian Province

作　　者：李萍军 唐小萍[1] 

机构地区：[1]江西省地质矿产勘查开发局赣西地质调查大队,江西南昌330251

出　　处：《铜业工程》2013年第6期45-48,共4页Copper Engineering

摘　　要：江墩铅锌矿化区出露地层较简单,有三叠系焦坑组灰白色中粒石英砂岩和震旦系云母片岩以及第四系。野外地质勘查及已有地质资料分析,区内发育一条走向北西-南东,倾向北东的推覆断裂及一条走向北东-南西,倾向北西的张性正断层,控制区内两次岩浆活动,其一是花岗质岩浆活动,其二是闪长质岩浆活动,两次岩浆活动致使推覆构造分段出现。从大量地质勘查资料论证,江墩矿化区推覆断裂的存在,并简要分析了推覆断裂的地质构造特征以及岩浆活动和控矿作用,在区域构造分析及岩浆活动岩性分析基础上,结合同类型矿床的地质构造特征、分布规律、组合特征等进行类比,论证其铅、锌矿床及含矿母岩岩体矿化点均与推覆断裂有成因、空间上的联系,是地质找矿的一个重要因素。The outcrop stratums in Jiangdun lead - zinc area are simple. It contains Triassic Jiaokeng group gray medium - grained quartz sandstone, Sinian mica schist and quaternary. The geological prospecting and geological data shows that a nappe fault, towards the NW - SE, tendency NE and a tensional normal fault, towards the NE - SW, tendency NW, developed in this area. Twice magmatism has been controlled by them, one is granitic magmatism, and the other is dioritic magmatism, which resulted in the nappe tectonic segmentation. In this paper, the existence of nappe fault has been demonstrated based on lots of geological exploration data. In addition, fracture characteristics, magmatism and ore - controlling role of the nappe fault also have been analyzed briefly. It demon- strates the causes and spatial linkages among lead - zinc ore deposit, mineralization of ore - bearing rock and the nappe fault is an im- portant factor of geological prospecting. But all of those should be based on the regional tectonic and magmatic activity analysis and combined with the same type of deposit to analogy their geological structure, distribution, composition and other characteristics.

关 键 词：闽江墩 推覆断裂 断坪 导矿 混杂岩浆 探矿前提 

分 类 号：P542[天文地球—构造地质学]