东昆仑山西段铁矿成矿机制和找矿模型  

Metallogenic mechanism and prospecting model of iron deposits in the western segment of East Kunlun Mountain

作　　者：刘艳宾[1] 弓小平[1] 陈斌[1,2] 王哲[1] 毛磊[1] 阿丽娜[1] 

机构地区：[1]新疆大学地质与勘查工程学院,新疆乌鲁木齐830049 [2]北京大学地球与空间科学学院,北京100871

出　　处：《地质通报》2011年第12期1950-1961,共12页Geological Bulletin of China

基　　金：中国地质调查局项目<新疆东昆仑西段鸭子泉-维宝地区铜铁矿远景调查>下设专项<东昆仑西段铁矿部署研究>(编号:1212010880303);新疆大学"天山学者"特聘教授启动基金项目

摘　　要：在全面收集东昆仑西段地区3种主要铁矿矿床类型(迪木那里克、蟠龙峰、塔特拉克)资料的基础上,综合分析其成矿地质条件、物探等找矿信息,并对该区铁矿成矿机制进行了研究,建立其成矿模式,总结迪木那里克和蟠龙峰铁矿找矿模型。研究表明,沉积变质型铁矿主要分布于长沙沟蛇绿混杂岩和茫崖蛇绿混杂岩带内,成矿时代主要为古生代,含矿建造为复理石建造和大理岩建造。矽卡岩型铁矿主要分布在研究区中部呈北西-南东向展布的祁漫塔格蛇绿混杂岩带中,赋矿建造主要为古元古代白沙河岩组大理岩建造、蓟县系结晶灰岩-白云质灰岩-白云岩建造和上石炭统-下二叠统微晶灰岩-钙质白云岩-生物微晶灰岩建造,成矿时代为古生代和中生代;与成矿作用有关的侵入岩主要为印支期花岗闪长岩、二长花岗岩和燕山期的钾长花岗岩;矿体主要分布在受断层控制的侵入岩与碳酸盐岩接触带的矽卡岩中,矽卡岩以钙质矽卡岩为主。Based on the summarization of the regional geology and ore-forming characteristics of three types of iron deposits and a study of the geological conditions and geophysical data of the western segment of the East Kunlun Mountain, the authors established metallogenic models to explain the ore-forming mechanisms of the Dimunalike, Panlongfeng and Tatelark iron deposits. The sedi- mentary-metamorphic iron deposits formed in the Paleozoic are mainly distributed in the Changshagou and Mangya ophiolite melange zones, and hosted mainly in flysch and marble formations. The skarn type iron deposits are distributed mainly in the NVg-SE trending Qimantage ophiolite mhlange zone, hosted in the marble formation of the Palaeoproterozoic Baishahe Formation, the crystalline lime- stone-dolomitic limestone-dolonfite of the Jixian System and the Late Carboniferous-Early Permian .reef hmestone-graywacke- dolomite-biological micrite formation. The skam type iron deposit was formed mainly in Paleozoic and Mesozoic epochs, genetically linked to the intrusion of the Indo-Chinese granodiorite and adamellite and the Yanshanian K-feldspar granites, with ore bodies host- ed mainly in the calcareous skarns formed in the contact zones between the fault-controlled intrusions and the carbonate.

关 键 词：沉积变质型铁矿 矽卡岩型铁矿 成矿机制 找矿模型 东昆仑西段 

分 类 号：P618.31[天文地球—矿床学]