内蒙古东乌旗遥感构造和蚀变信息提取与找矿预测  

Extraction of linear structure and alteration information based on remote sensing image and ore-prospecting prognosis for Dongwu Banner,Inner Mongolia

作　　者：钱建平[1] 张渊[1] 赵小星[1] 赵少杰[1] 李承礼[1] 

机构地区：[1]桂林理工大学地球科学学院,桂林541004

出　　处：《国土资源遥感》2013年第3期109-117,共9页Remote Sensing for Land & Resources

基　　金：广西矿冶与环境科学实验中心;广西隐伏金属矿产勘查重点实验室;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开放基金项目(编号:200913);中国冶金地质勘查工程总局第一地质勘查院项目(中冶勘一地任[2006]32号)共同资助

摘　　要：为了研究内蒙古东乌旗Pb-Zn-Ag多金属成矿区的找矿远景,在对Landsat7 ETM+数据进行几何纠正、大气校正和去干扰等预处理的基础上,对多波段假彩色合成图像做滤波处理以增强区域构造信息、进行线性构造解译;运用分形几何学原理和计盒维数法求取线性构造分维值,得到线性构造的统计自相似性和分形特征;采用主成分分析和阈值分割法对图像进行铁染、羟基蚀变信息提取;最后根据区内线性构造、遥感蚀变信息、岩体分布特征、区域地球化学异常和已知矿床(点)分布资料综合分析,圈定出3个级别的7个找矿预测区,再次证实了基于遥感图像的线性构造和遥感蚀变异常信息可以作为找矿预测的标志。Using ETM＋ remote sensing data as the basic information sources,the authors carried out remote sensing geological prospecting in Pb-Zn-Ag polymetallic ore zones of Dongwu Banner,Inner Mongolia.Remote sensing image was processed by geometric correction,atmospheric correction and the noise removal technology.Image filtering was conducted so as to enhance tectonic information and explain linear structure.The fractal dimension values were calculated by the method of fractal geometry and the box-counting dimension.As a result,the linear structures showed excellent statistical self-similarity and fractal characteristics in the study area.Principal component analysis and threshold segmentation were used to enhance the spectrum and space information and extract the iron-stained and hydroxy alteration information.Through comprehensively analyzing the linear structure,remote sensing alteration information,rock mass distribution characteristics,regional geochemical information and known deposits,seven metallogenic prospective areas at three levels were delineated.

关 键 词：ETM+遥感数据 线性构造 分维值 蚀变信息提取 找矿预测 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]