西昆仑北部地区铅锌铜矿带遥感构造蚀变信息提取与成矿预测  

The Comprehensive Interpretation of Remote Sensing Information and Prospecting for the Pb-Zn-Cu Ore Belts in the Northern Part of West Kunlun Orogen

作　　者：周灵洁[1,2] 张正伟[1] 程远 沈能平[1] 张中山[1,2] 游富华[1,2] 

机构地区：[1]中国科学院地球化学研究所矿床地球化学国家重点实验室,贵州贵阳550002 [2]中国科学院研究生院,北京100049 [3]河南省有色金属地质矿产局第五地质大队,河南郑州450016

出　　处：《大地构造与成矿学》2011年第4期603-611,共9页Geotectonica et Metallogenia

基　　金：国家自然科学基金(41073042);国家自然科学青年基金(40903021);矿床地球化学国家重点实验室自主研究课题

摘　　要：根据遥感异常信息提取的需要,在西昆仑北部地区的典型矿区——铁克里克-卡兰古铅锌铜矿带采集地表蚀变岩石样品,应用短波红外矿物分析技术对其矿物组合进行波谱分析,以ASTER和ETM+数据为基础提取矿化蚀变信息;同时通过图像增强等多种数据处理方法提取研究区的线性构造及环形构造,得到研究区1:100000的遥感异常图。从已知矿点在空间的分布情况看出,西昆仑北部地区铅锌铜矿带不但受地层层位的明显控制,构造控矿作用也十分明显。因此,结合矿化蚀变强烈程度、地层层位和该区赋矿层位吻合情况、构造活动强烈程度等综合情况,圈定出一级成矿预测区3个,二级成矿预测区4个。The Pb-Zn-Cu ore belts in the northern part of West Kunlun are important Pb-Zn ore belts in China.They are located in the Tiekelike-Kalangu area,inbetween the southwest of Tarim Basin and west Kunlun orogen.The deposits occurring in the belt are controlled obviously by the Devonian terrestrial clastic sedimentary and Carboniferous carbonate sediments.We investigated the correlation between mineralization distribution and the fault system through remote sensing image interpretation on the alteration information and comparison with known deposits.The spectra of altered minerals were interpreted by infrared short wave mineralogical analysis technology.Meanwhile,ore-related alteration information was extracted from ASTER and ETM＋ data,while the linear and annular structures were Abstracted through data processing such as image intensification.These results show that the Pb-Zn-Cu ore belts in the northern part of West Kunlun orogen appear in the areas with high tectonic activities,and are subjected to Middle Devonian and Lower Carboniferous strata.Therefore,the delimitation of metallogenic prognosis areas is under the limitation of mineralized alteration degree,tectonic activity intensity and the distribution ranges of the ore-bearing layers.

关 键 词：遥感 矿化蚀变 线性构造 环形构造 西昆仑 

分 类 号：P627[天文地球—地质矿产勘探] P612[天文地球—地质学]