新疆伊宁县克峡希金铜矿地质特征及成因分析

Geological characteristics and genesis analysis of Kexiaxi gold and copper deposit in Yining County,Xinjiang

克峡希金铜矿床所处大地构造位置属于博罗科努早古生代岛弧的西段,科古琴地块南部边缘,南侧以科古琴山南坡断裂为界与吐拉苏盆地相邻,矿床位于吐拉苏盆地北缘。该矿床金铜矿化受岩性、接触带构造控制,闪长玢岩是成矿主要物质来源,北东向碎裂构造、闪长玢岩为主要控矿因素。在深入分析区域地质背景、矿区地质特征、矿床地质特征的基础上,认为该矿床属于是复合成因的斑岩金铜矿床。成矿作用包括斑岩成矿作用与后期构造热液成矿作用。

The tectonic location of the Kexiaxi gold and copper deposit belongs to the western part of the Borokonu early Paleozoic island arc,the southern edge of the Keguqin massif,and the southern edge of the Keguqin massif is adjacent to the Turasu basin with the south slope fault of the Keguqin mountain as the boundary.The deposit is located in the northern edge of the Turasu basin.The gold and copper mineralization of this deposit is controlled by lithology and contact zone structure,with diorite porphyrite as the main source of mineralization material,and northeast trending cataclastic structure and diorite porphyrite as the main ore-controlling factors.On the basis of in-depth analysis of the regional geological background,geological characteristics of the mining area,and geological characteristics of the deposit,it is believed that the deposit belongs to a porphyry gold copper deposit of composite origin.Mineralization includes porphyry mineralization and later tectonic hydrothermal mineralization.