湘南坪宝地区水系沉积物地球化学特征及找矿靶区预测  

Geochemical Characteristics of Stream Sediments and Prospecting Target Prediction in the Pingbao Area,Southern Hunan Province

作　　者：刘邦定[1,2] 陈新跃[1] 罗小亚 谭仕敏 马小双[1] 

机构地区：[1]湖南科技大学,湖南湘潭411201 [2]湖南省地质调查院,湖南长沙410116

出　　处：《地质与勘探》2015年第4期722-730,共9页Geology and Exploration

基　　金：中国地质调查局矿调项目(资[2013]01-015-034);国家自然科学基金(41372209;40902062);湖南省教育厅优秀青年项目(12B039);湖南省研究生科研创新基金(CX2013B402)联合资助

摘　　要：利用DGSInfo软件对湘南坪宝地区1∶5万水系沉积物地球化学数据进行元素相关分析、R聚类分析和因子分析,确定元素的共生组合关系;采用原始数据取对数剔除异点使元素含量呈正态分布,以高出背景值的1-2倍标准差为异常下限值,制作出各元素异常图和组合异常图;在GIS支持下,结合区内成矿地质条件对组合异常区进行综合分析,圈定了麦子坪-金子岗-梧桐、禾茂村-马鞍岭两个铅锌多金属矿找矿靶区。By use of the DGSInfo software,analysis is conducted to 1 ∶ 50000 stream sediment geochemistry data in the Pingbao area,southern Hunan Province,involving element correlation,R clustering and factors. The purpose is to determine the combination of symbiosis among elements. By taking the logarithm with original data to eliminate singular points and to make the element contents be a normal distribution,this work prepares the anomaly chart and the integrated anomaly chart for every element with the threshold 1 - 2 times the background value. Supported by GIS,coupled with comprehensive analysis of the combination anomaly areas to the ore-forming geological conditions in this region,this work determines two prospecting targets of leadzinc multiple metal deposits,i.e. the Maizi Ping-Jingzigang-Wutong and Hemaochun-Ma＇anling areas.

关 键 词：水系沉积物 地球化学特征 组合异常 找矿靶区预测 坪宝地区 

分 类 号：P618[天文地球—矿床学]