摘要
大水金矿床位于大水金矿田的东侧,是受断裂构造控制的岩浆热液型金矿床。通过实践总结了"两期三组断裂"构造控矿规律,即早期的F4断裂(北西西向断裂)、与F4断裂同期相切的旋扭构造和晚期的放射状断裂共同构成矿区的基本构造格架,从而形成了2组容矿断裂(F4断裂与其同期相切的旋扭构造为一组容矿断裂;沿放射状断裂侵入的脉岩与围岩的接触断裂为另一组容矿断裂),矿体基本全部位于这2组容矿断裂内。依据构造控矿规律,对大水金矿床深部进行了找矿预测,发现了Au20-1矿体,找矿效果显著。
Dashui Gold Deposit lies on the east of Dashui Gold Field,which is a magmatic hydrothermal gold deposit controlled by fault structures.Through practice,this paper summarized the ore control laws of "2 phases and 3 groups of faults".The fractures including earlier fracture F 4(NWW),rotational shear structure tangent to simulta-neous F 4 and late radial fracture constitute the basic tectonic framework of the ore district, forming 2 groups of ore-hosting fractures(one is composed of F4 and simultaneous rotational shear structure,the other is contact fracture of vein rock intruding along radial fractures and surrounding rock).Nearly all of the ore bodies are located in the 2 groups of ore-hosting fractures.According to the structural control of ore deposition,Au20-1 ore body was found through prospecting prediction in the deep part of Dashui Gold Deposit,achieving significant prospecting breakthrough.
作者
李鸿睿
韦乐乐
严康
李康宁
Li Hongrui;Wei Lele;Yan Kang;Li Kangning(Third Institute Geological and Mineral Exploration,Gansu Provincial Bureau of Geology and Mineral Resources;Shaanxi Institute of International Trade Jewelry Institute,Shaanxi Province Gemological Teaching Demonstration Center)
出处
《黄金》
CAS
2019年第4期4-8,共5页
Gold
基金
危机矿山接替资源勘查项目(1212011220727)
中国地质调查局项目(121201004000160901)
关键词
大水金矿床
构造控矿
断裂构造
旋扭构造
容矿断裂
找矿预测
Dashui Gold Deposit
structural ore control
fault structure
rotational structure
ore-hosting structure
prospecting prediction
