衬值滤波法在化探数据处理及找矿中的应用——以乡城—稻城—得荣地区斑岩型铜矿为例  

THE APPLICATION OF THE CONTRAST FILTERING METHOD IN GEOCHEMICAL DATA-PROCESSING AND ORE-PROSPECTING:THE CASE OF THE PORPHYRY COPPER DEPOSIT IN XIANGCHENG-DAOCHENG-DERONG AREA

作　　者：廖敏[1] 李佑国[1] 费光春[1] 童蕾 

机构地区：[1]成都理工大学地球科学学院 [2]四川省峨眉山市第二中学,四川峨眉山614200

出　　处：《地质找矿论丛》2007年第1期76-80,共5页Contributions to Geology and Mineral Resources Research

摘　　要：川西乡城—稻城—得荣地区地处川西高原,相对高差一般大于2 000 m,高山深切割现象显著。地质背景以及表生地球化学环境变化复杂,找矿标志不明显,找矿难度大。采用传统化探方法可能漏掉部分异常强度不大而可能成矿的异常;或者是矿体有一定埋藏深度而异常较弱未引起足够的重视,影响找矿效果。子区中位数衬值滤波方法解决了低背景区和高背景区弱小异常的识别问题,克服了采用全区统一异常下限给异常识别带来的困难。The area of Xiangcheng-Daocheng-Derong is located in the western Sichuan continental plateau with relative differential height more than 2000 meter and deep dissection. Geological conditions and surface geochemical environment are complicated and ore marks are weak and the ore prospecting is difficult. Traditional geochemical data processing might miss some anomalies that are not interested because of their low intensity and deep bury but are related to mineralization, or ore bodies. The Subinterval area median contrast filtering method that can recognize weak anomalies of the low-background area and high-back- ground area resolves the problem.

关 键 词：化学异常 衬值滤波 斑岩型铜矿 四川省 

分 类 号：P622.3[天文地球—地质矿产勘探] P628.1[天文地球—地质学]