黔西南植被覆盖区遥感构造和植被异常信息提取:金矿找矿预测  

Extraction of Remote Sensing Information of Structure and Vegetation Anomaly:Prospecting Prognosis of Gold Deposit in Vegetation Coverage Area of Southwest of Guizhou

作　　者：钱建平[1] 赵小星[1,2] 唐善法[1] 陈珊珊[1] 

机构地区：[1]桂林理工大学地球科学学院,广西桂林541004 [2]福建省地质调查研究院,福建福州350013

出　　处：《现代地质》2014年第4期772-781,共10页Geoscience

基　　金：国家自然科学基金项目(41263003);桂林理工大学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(200913)

摘　　要：对黔西南地区ETM+遥感数据,通过彩色合成、直方图拉伸进行信息增强处理,运用主成分分析、监督分类,提取植被覆盖区遥感影像上金等元素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对线性构造进行增强处理,并进行目视解译,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80%以上的已知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、构造、矿点、线性构造分维等值线特征、金的地球化学异常特征和遥感植被异常特征等信息,在该区圈出7个三级有利成矿区。This paper describes the way to extract information of gold anomaly in vegetation coverage area through a case study from the southwest area in Guizhou.Principal component analysis,false color composite, stretch histogram and supervise classification,etc.are analyzed on the remote sensing images using ENVI 4.8 software.It is suggested that the linear structure,which is delineated by convolution filter and morphological analysis method,is characterized by statistical self-similarity and fractal geometry.It is found that the high val-ue of fractal dimension is roughly coincident with the gold anomaly of vegetation by the comparison between con-tour maps of plant geochemical anomaly and fractal dimensions,which is calculated by box-counting.As a mat-ter of fact,80 percent of gold deposits or occurrences are located in areas of high value of fractal dimension and vegetation anomaly.By the comprehensive analysis of stratigraphy,igneous rocks,gold mineralization,fractal dimension of linear structures,anomaly features of gold geochemical and vegetation anomaly from remote sen-sing,seven exploration targets with three levels of probabilities are figured out.

关 键 词：黔西南 ETM+遥感数据 线性构造解译 植被地球化学异常 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]