西南天山梅尔盖西地区成矿地质条件及成矿预测  

Metallogenic Prognosis in the Maiergaixi Region, Southwest Tianshan Orogeny

作　　者：梁群峰 杨克俭 杨运军 张宽房 徐涛 

机构地区：[1]陕西省地质调查院,陕西西安710016

出　　处：《西北地质》2013年第1期91-102,共12页Northwestern Geology

基　　金：中国地质调查局阿合奇地区矿产远景调查项目(矿调[2004-2006]7-2号)

摘　　要：在分析前人研究成果及以往矿产调查工作的基础上,结合找矿实践,笔者对研究区成矿地质条件、地球物理特征、地球化学特征、矿产分布特征等进行了分析,认为梅尔盖西地区主攻矿种为铜、铅、金、锑,主攻矿床类型为与火山岩有关的铜矿床、沉积-改造型铜矿床、沉积-改造型铅锌矿、热液型铅锌、锑矿床、构造蚀变岩型金矿床。已发现的矿(化)体赋存于古生代上志留统—下泥盆统乌帕塔尔干岩群碎屑岩建造及托什罕蛇绿混杂岩带中,受近东西向、北东东—南西西向展布的压扭性断裂控制,分布于鲁德涅瓦岩体外接触带中,成矿与鲁德涅瓦岩体及物化探异常关系密切。在此基础上开展了研究区成矿预测,圈定成矿远景区6个,找矿靶区8个,对各找矿靶区的主攻矿种、成矿类型、找矿标志、找矿潜力进行了探讨和总结,对8个靶区进行了综合评述和排序,供野外一线地质人员参考。Ore-forming geologieal eonditions, eharaeteristies of geophysics, geoehemistry and distribution of mineral resources in the Maiergaixi Region, Southwest Tianshan Orogeny, were analyzed on the basis of previous research results and regional geology together with prospecting praetiee. It indicated that the most promising minerals are copper, lead, gold and stibium in the region. The deposit types for prospeeting in the region are copper deposits related with volcanics, transformed sedimentary eopper and lead-zine deposits, hydrothermal type lead-zinc deposits, stibium-gold deposits related with hydrothermal fluid and gold deposits of teetonic altered rock. The discovered deposits occurred in elastic roeks of paleozoie Upper Siliurian-Lower Devonian Wupataergan terrain and the Yuoshihan ophiolitie rock. The deposits distributed in the outer eontaet zone of Ludeniewa rock terrain were controlled by compressor-shear faults trending for E- W and NEE-SWW. The ore-forming had close relationship with Ludeniewa rock terrain, and abnormal geophysical and geochemical exploration. Six favorable ore-prospecting areas and eight prospecting targets had been delineated. The most promising minerals, deposit types, clues for prospecting and prospecting potential were discussed and summarized. The analysis and ranking for the eight targets are expected to be referenced by field geologists.

关 键 词：西南天山 梅尔盖西 成矿地质条件 成矿远景区 找矿靶区 

分 类 号：P617[天文地球—矿床学]