卫宁北山地区遥感找矿地质异常信息提取及分析  

The extraction and analysis of remote sensing geological anomaly informations in Weining north mountain

作　　者：张晓东 张永庭 艾宁 褚小东 

机构地区：[1]宁夏地质调查院,银川750021 [2]宁夏遥感测绘勘查院,银川750021 [3]宁夏矿产地质调查所,银川750021

出　　处：《矿产与地质》2012年第4期344-349,共6页Mineral Resources and Geology

基　　金：宁夏矿产资源评价项目(编号1212010813029)资助

摘　　要：以ETM+影像为基础数据,采用去干扰异常主分量门限化技术提取卫宁北山地区遥感矿化蚀变异常信息,结果表明:羟基异常主要分布在铜铁沟—岔梁子—平湖滩一带,自北向南沿构造破碎带呈带状结构,一二三级异常均有,且与已知矿(化)点吻合较好;铁染异常分布面积小,主要为三级异常,在色井沟和红石堆,异常以片状沿沟谷自北向南呈带状分布,与已知矿点对应少,示矿作用不明显。结合SPOT5数据,对研究区进行"线、环、带、色、块"找矿五要素遥感地质构造解译。以断层和褶皱轴线为主的线要素大多呈近EW向分布;环形构造7个,推测位于金场子的环有可能由隐伏岩体引起;带要素2条,位于金场子西部,呈EW走向;色要素分布面积小且零散;未解译出块要素。根据获取的地质异常信息,建立遥感示矿模型,结合地质分析,圈定了3个遥感示矿异常区。Based on LANDSAT ETM＋ imagery,the paper extracts remote sensing mineralizing anomalies information employing De-interfered Anomalous Principal Component Thresholding Technique.The result indicates that hydroxyl contamination anomalies mainly distribute in the area of Tongtiegou-Chaliangzi-Pinghutan,the anomalies show ribbon structure along fracture zone from north to south and have three different levels,at the same time coincides well with well-known mineral occurrence;ferric contamination anomalies have the characteristics of small area and third level primarily,especially in Sejinggou and Hongshidui the anomalies have ribbon structure along valley from north to south but only few well known mineral occurrence can match with them,Therefore has a little mineral indication significance.Integrated with SPOT5 data,five features remote sensing method for ore exploration is used for interpretation.In study area line feature mainly includes fault and fold axis,7 circles are obtained and the one in Jinchangzi probably relates to concealed rock;2 ribbon feature located in the west of Jinchangzi,some color feature with small area and no block feature.According to these geological anomalies the remote sensing model used for mineral indication haw been set up,with the geological analysis 3 remote sensing mineral indication districts are delineated.

关 键 词：遥感地质异常 遥感地质构造解译 卫宁北山 

分 类 号：TP753[自动化与计算机技术—检测技术与自动化装置]