西藏冈底斯东段遥感构造解译及成矿靶区圈定  

Structural Interpretation of Remote Sensing Images and Determination of Metallogenic Targets in the Eastern Section of Gangdise in Tibet

作　　者：黄照强[1] 江淼[1] 

机构地区：[1]中国冶金地质总局矿产资源研究院,北京100025

出　　处：《地质与勘探》2012年第2期387-395,共9页Geology and Exploration

基　　金：中国冶金地质总局科研项目"西藏冈底斯东段铜多金属资源评价与新方法技术研究"资助

摘　　要：通过利用Landsat ETM+遥感影像数据对西藏冈底斯东段进行线性构造和环形构造解译,研究线性构造和环形构造在遥感影像中的特征,选择合适的波段组合,并采用去相关拉伸、边缘检测等方法增强图像线性特征,提取构造信息。结合研究区已知地质资料和已知矿点资料,对线性构造和环形构造的分布规律进行分析和评价。结果表明东西向线性构造是研究区的最主要构造,与北西向、北东向线性构造交汇区并与环形构造交叠区是有利的成矿区域,与已知矿点相吻合,并且还圈定出若干个找矿远景区。The purpose of this work is to extract linear and ring-like structure information from the Landsat ETM＋ remote sensing images of the east- ern section of Gangdise in Tibet. The features of linear and ring-like structures were studied, and the combination of appropriate wave bands were chosen and the methods of decorrelation stretch and edge detection were used to enhance the linearity feature of the images. In combination with available geolog- ical and mine data,the distribution regularities of linear and ring structures were analyzed and evaluated. The result indicates that the E-W linear struc- tures are the most dominating structures, and the intersecting areas of the EW linear structures with NW or NE trending structures overlapped by the ring -like structures are the favorable metallogenie regions which coincide with known ore spots. And several perspective metallogenic targets are determined for this regtion.

关 键 词：遥感影像 线形构造解译 成矿预测 

分 类 号：P627[天文地球—地质矿产勘探]