河南祁雨沟金矿及外围高植被区遥感找矿预测  

Remote Sensing Prospecting in High Vegetation Coverage Area——A Case Study of the Qiyugou Gold Ore Deposit and its Environs,Song County,Henan Province

作　　者：赵小星[1] 钱建平[1] 张渊[1] 覃顺桥[1] 

机构地区：[1]桂林理工大学地球科学学院,广西桂林541004

出　　处：《大地构造与成矿学》2012年第4期642-651,共10页Geotectonica et Metallogenia

基　　金：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(编号:200913);有色及贵金属隐伏矿床勘查教育部工程研究中心项目(编号:教技函[2007]72号);河南嵩县天运矿业有限责任公司项目资助

摘　　要：应用ENVI4.8软件,对河南嵩县祁雨沟金矿及外围ETM+遥感数据通过主成分分析、彩色合成、直方图拉伸、监督分类等方法,成功地提取了高植被覆盖区遥感影像上金的植物地球化学异常信息。利用卷积滤波和形态学分析方法进行线性构造解译,利用计盒维数法求得研究区的线性构造分维值,得出本区线性构造具有良好的统计自相似性和分形特征。比较线性构造分维等值线图和植物地球化学异常图可知,线性构造集中区与植被异常区基本吻合,区内已知85%以上的矿点分布于植被异常和线性构造集中区。综合分析地层岩性、岩浆岩、矿点、线性构造分维等值线特征和遥感植被异常特征等信息,圈出了三级9个找矿靶区。This article describes the way to extract information of gold anomaly in high vegetation coverage area through a case study from the Qiyugou gold ore deposit and its environs,Song county,Henan province.Principal component analysis,false color composite,stretch histogram and supervise classification were analyzed on the remote sensing images using ENVI4.8 software.It is suggested that the linear structure,which is delineated using convolution filter and morphological analysis method,is characterized by statistical self-similarity and fractal geometry.It is found that the high value of fractal dimension is roughly coincident with the gold anomaly of vegetation by comparison of the contour maps of plant geochemical anomaly and fractal dimensions calculated by box-counting method.As a matter of fact,85 percent of gold deposits or occurrences is located in areas with high values of fractal dimension and vegetation anomalies.By comprehensive analysis of stratigraphy,igneous rocks,gold mineralization,fractal dimension of linear structure and vegetation anomaly from remote sensing,nine exploration targets with three levels of probabilities are figured out.

关 键 词：ETM+遥感数据 线性构造解译 植物地球化学异常信息提取 找矿预测 

分 类 号：P627[天文地球—地质矿产勘探] TP79[天文地球—地质学]