Analysis of the Tectonic Stress Field in Hutouya Copper Polymetallic Ore Field, Qimantage of East Kunlun
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摘要: 基于近年来东昆仑祁漫塔格地区在找矿工作中遇到的问题，开展矿田构造的研究为深部及外围找矿提供依据已经迫在眉睫。在本次矿田构造研究中，选取构造发育的虎头崖矿田进行构造应力场的分析，利用野外地质分析和区域构造解析法、矿田断裂构造解析、节理统计分析法、共轭剪节理分析法、化石应变测量统计分析以及韧性变形分析等，首次对区内各断裂、节理及韧性变形带的构造应力场进行研究，厘定出成矿前、成矿期和成矿期后的3期次，共8个阶段的构造应力场，主要为：成矿前：（加里东—华里西期）北北东—南北→北北东→北西→北北西；成矿期：（华里西—印支期）北北东—南北→北北西；成矿后期：（燕山—喜山期）北西—北西西→北东东—东西→南北；并为未来区内的构造应力场的研究提出了确定原则；最后在区域大地构造演化基础上，归纳出研究区构造应力演化过程。在该矽卡岩型铜多金属矿田成矿期构造北西西、近东西、北东东向断裂交汇部位及其派生断裂是寻找矿的有利构造部位。Abstract: In recent years the prospecting work in Qimantage of east Kunlun makes it an urgent problem to carry out the study of ore-field structures in the deeper and outer areas. This research takes Hutouya ore field as a case for the analysis of the tectonic stress field. Using the field geological observation, regional tectonic analytical method, fractured analytical method, joint statistic analytical method, and conjugate shear joints analytical method, this paper studied for the first time the faulted structures, the joints and the ductile faults. It is proposed that the structural stress field can be divided into pre-mineral periods (NNE-SN→NNE→NNW), metallogenic periods (NE-NNE→SN-NNW) and post-mineralization (NW-NWW→NEE-EW→SN),establishing a fundamental principle of the tectonic stress field in Qimantage area. On the basis of regional tectonic evolution, the process of tectonic stress field in the study area is induced. In the skarn-type polymetallic deposit, the intersections of NWW, near-EW, NEE trending faults and their derived faults are favorable prospecting locations.
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