摘要
前人资源评价工作显示新疆伊犁-中天山地块东部库米什地区具有一定的钨矿找矿前景,并已发现有忠宝中型矽卡岩型钨矿床。为进一步查明区内钨矿找矿有利地区,文章以对忠宝钨矿床的成因认识为基础,通过分析库米什地区多光谱(ETM+)、高光谱(EO-1)等遥感蚀变信息及基于多重分形建模思想的奇异性分析方法,对区域1:20万地球化学数据进行处理,并结合本区的构造演化及成矿地质背景,提取与钨矿化有关的找矿信息。结果显示,与钨有关的矿化信息总体具有如下分布特点:①沿中天山地块南缘忠宝岩体及桑树园子岩体与围岩的接触带部位分布;②中天山地块内沿NWW向串珠状分布。各类矿化信息均与花岗岩体关系密切,并表现出明显的分带性及定向分布特征。结合已有研究,认为本地区钨矿化应与库米什地区南天山洋东段闭合及后造山伸展作用所引发的构造-岩浆活动关系密切。根据上述认识对库米什地区钨矿找矿远景进行了探讨,并根据找矿信息圈定了若干有利的成矿远景区。
Previous resource evaluation work shows an advantageous potential of tungsten ore prospecting in Kumux area in the east part of Ill-middle Tianshan block of Xinjiang, where the Zhongbao medium-size skarn-type tung- sten deposit has been found. In order to further confirm advantageous places for tungsten ore-prospecting in this area, the authors, on the basis of the study of the Zhongbao tungsten deposit, chose the multispectral（ETM＋ ） and high spectrum （EO-1） remote sensing technology and performed data-processing of 1：200 000 regional geo- chemical anomalies based on the singular analytical method of multifractal modeling thought as well as the tec- tonic evolution and geological background of Kumux area so as to extract the favorable tungsten prospecting in- formation. The results show that the metallogenic information is distributed as follows： （1） It is distributed along the contact zone between Zhongbao and Sangshuyuanzi granite bodies and the wall rock in the southern margin of Middle Tianshan block. （2） The information shows NWW-trending beaded distribution within Middle Tianshan block. Various types of metallogenic information are closely related to the granite body and show obvious zonation and directional distribution. In combination with data available, the authors conclude that the tungsten mineralization was closely related to the tectonic magmatic activity resulting from the closure of South Tianshan Ocean and post-stretching action. At last, the authors discussed the tungsten metallogenic potential in Kumux area and delineated the advantageous metallogenic prospective districts according to the favorable prospecting in- formation.
出处
《矿床地质》
CAS
CSCD
北大核心
2013年第3期579-590,共12页
Mineral Deposits
基金
"十一五"国家科技支撑计划项目"东天山-北山成矿带整体研究与找矿靶区优选评价(2007BA25B04)"资助
关键词
地质学
钨矿
遥感异常
地球化学异常
成矿远景
库米什
geology, tungsten deposit, remote sensing anomaly, geochemical anomaly, metallogenic prospect, Kumux
