Analysis of the Tectonic Stress Field in Hutouya Copper Polymetallic Ore Field, Qimantage of East Kunlun

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.