新疆西克尔地区遥感蚀变信息提取与成矿预测  

Extraction of Remote Sensing Alteration and Metallogenic Prognosis in Xikeer Area,Xinjiang

作　　者：刘桂萍 蔡宏明 姜波[2] 张莹莹[1] Liu Guiping1,2, Cai Hongming1,3, Jiang Bo2 ,Zhang Yingying1(1. College of Geology and Mining Engineering, Xinjiang University, Urumqi 830046, China ; 2. College of Resources and Earth Sciences, China University of Mining and Technology, Xuzhou 221116, China ; 3. Geography Postdoctoral Research Station ,Xinjiang University, Urumqi 830046, Chin)

机构地区：[1]新疆大学地质与矿业工程学院,新疆乌鲁木齐830046 [2]中国矿业大学资源与地球科学学院,江苏徐州221116 [3]新疆大学地理学博士后科研流动站,新疆乌鲁木齐830046

出　　处：《金属矿山》2018年第3期122-131,共10页Metal Mine

基　　金：新疆维吾尔自治区自然科学基金项目(编号:2014211B011)

摘　　要：新疆西克尔地区自然条件恶劣,地质研究程度低,但分布有众多小型的铜矿点,具有良好的成矿地质背景。以高分2号和Landsat 7 ETM+遥感影像为数据源,根据西克尔地区遥感影像特征和相关地质资料,总结了遥感影像解译标志,对研究区内进行了岩性和构造解译,并采用主成分分析法对去干扰后的ETM+遥感影像进行蚀变异常信息提取和强弱分级,野外查证表明遥感异常区域有较好的矿化蚀变显示。在对区域成矿地质条件和典型矿床综合研究的基础上,根据地层、构造和蚀变异常的空间分布特征以及区域化探资料进行了成矿预测,圈定了5个铜矿成矿远景区(编号分别为Ⅰ~#、Ⅱ~#、Ⅲ~#、Ⅳ~#、Ⅴ~#),其中一类成矿远景区2个,二类成矿远景区2个,三类成矿远景区1个。Ⅰ~#成矿远景区野外验证发现了发育较好的铜矿化,表明所圈定的成矿远景区有一定的可靠性,采用遥感方法在新疆西克尔地区进行找矿预测具有可行性。Xikeer area in Xinjiang is characterized by poor natural conditions and low degree of geological study, but many copper points with small scale are distributed in the area, the metallogenic geological background of the area is good. In order to provide some reliable information for the prospecting work of copper deposit in the area, taking the GF-2 and Landsat 7 ETM＋ remote sensing image of the area as the study data,according to the characteristics of remote sensing image and some related geological data of Xikeer area, the interpretations marks of remote sensing images are summarized, and lithology and structure information of the study area are interpreted. The abnormal information is extracted from the Landsat ETM ＋ remote sensing image after removing interference by adopting principal component analysis method （ PCA ） , besides that, the remote sensing alteration abnormal information is classified. The field geological investigation results show that mineralization alteration is well developed in the remote sensing alteration abnormal area. Based on the comprehensive analysis of regional metallogenic geological condition and typical deposits of the area, according to the spatial distribution characteristics of strata, structure and alteration abnormal information and the regional geochemical data, the metallogenic prognosis work is done, five metallogenic prospective areas （ named as I# ,II# ,III# ,IV# ,V#） of copper deposit are delineated, among them,the number of the grade one metallogenie prospective area is two,the number of the grade two metallogenic prospective area is two, and the number of the grade three metallogenie prospective area is one. Good copper mineralization is found in the I# metallogenic prospective area by conducting filed geological investigation and verification work. The above study results indicated that the reliable of the metallogenie prospective areas delineated by the study is good ,which further show that it is feasible to adopt remote sensing method to conduct meta

关 键 词：遥感找矿 铜矿 蚀变信息 遥感解译 主成分分析 成矿远景区 找矿预测 

分 类 号：P627[天文地球—地质矿产勘探]