东昆仑西段卡而却卡铁铜多金属矿床成矿模式及找矿模型  

Metallogenic and Prospecting Model of Kaerqueka Iron-Copper Polymetallic Deposit in Western Segment of Eastern Kunlun

作　　者：张大明 张爱奎 屈光菊 逯登军 王磷 丁兆滨 李有录 ZHANG Daming;ZHANG Aikui;QU Guangju;LU Dengjun;WANG Lin;DING Zhaobin;LI Youlu(The Third Institution of Qinghai Geological Prospecting,Xining 810029,Qinghai,China)

机构地区：[1]青海省第三地质勘查院,青海西宁810029

出　　处：《西北地质》2020年第1期91-106,共16页Northwestern Geology

基　　金：青海省科技厅重大科技专项“柴达木盆地南北缘成矿系统与勘查开发示范”(2016-SF-A3);青海省科技厅自然科学基金“东昆仑西段金矿成矿规律及找矿突破”(2019-ZJ-7009)。

摘　　要：卡而却卡铁铜多金属矿床是东昆仑成矿带西段典型矿床,矿床成矿作用复杂,但以往对矿床成矿模式与找矿模型研究薄弱,制约了进一步找矿突破。笔者通过研究卡而却卡矿床成矿特征、成矿物理化学条件、成矿机制和矿床成因等,建立了矿床成矿模式及找矿模型。研究认为矿床成矿时代为中三叠世;成矿物质来源于岩浆、围岩和深部花岗斑岩;矿床成因属接触交代型和热液脉型斑岩型隐爆角砾岩型,分属2个不同的成矿系统,即与花岗岩有关的矽卡岩成矿系统和与花岗斑岩有关的热液脉型斑岩型隐爆角砾岩型成矿系统。1∶1万详细地质填图+水系沉积物测量+磁法测量、激电、重力剖面测量是寻找该类型矿床的最佳找矿方法组合。The Kaerquka iron-copper polymetallic deposit is typical of deposit in the Western section of the East Kunlun metallogenic belt.The mineralization of ore deposits is complex,but the previous research on ore deposit metallogenic model and ore prospecting model is not enough,which restricts the breakthrough in ore prospecting.By studying the characteristics of mineralization,physical and chemical conditions of mineralization,mechanism of mineralization and genesis of the deposit,the metallogenic model and prospecting model of the deposit are established in this paper.The metallogenic age of the deposit is considered to be Middle Triassic.The metallogenic materials come from magma,surrounding rock and deep granitic porphyry.Genesis of deposit includes skarn-type and hydrothermal-vein-porphyry-hydrothermal-breccia type,which belongs to two different metallogenic systems.One is skarn metallogenic system related to granite,the other is hydrothermal-vein-porphyry-hydrothermal-breccia metallogenic system related to granitic porphyry.The combination of 1/10,000 detailed geological mapping,stream sediment survey,magnetic survey,induced electrical and gravity profile survey is the best prospecting method to find this type of deposit.

关 键 词：找矿模型 成矿模式 矿床 卡而却卡 东昆仑 

分 类 号：P618.51[天文地球—矿床学]