鄂西地区铅锌地球化学异常分布特征及找矿意义  

Spatial Distribution Characteristics and Prospecting Significance of Geochemical Anomaly of Pb-Zn Elements in Western Hubei Province

作　　者：李堃 段其发 刘凯 邹先武 汤朝阳 彭三国 

机构地区：[1]武汉地质矿产研究所,武汉430223

出　　处：《华南地质与矿产》2010年第1期7-13,共7页Geology and Mineral Resources of South China

基　　金：中国地质调查局项目"湘西-鄂西地区铅锌多金属矿勘查选区研究"(编号:1212010632005)

摘　　要：地球化学元素的分布特征反映了元素矿化富集及空间变化的规律。通过对鄂西地区水系沉积物地球化学测量数据的统计分析,圈定了铅锌地球化学异常,并应用因子分析方法确定了主要成矿元素的共生组合及元素组合异常,为鄂西地区铅锌多金属矿勘查提供了有用的找矿信息。Pb、Zn两元素异常主要分布在青峰断裂带附近、神农架地区、黄陵背斜周缘、鹤峰地区和恩施地区南部。Pb、Zn、Cu、Mn四种元素关系密切,反映了该区矿化以铅锌多金属元素矿化富集为主的特征。青峰断裂带附近、神农架地区和恩施南部地区三个区域铅锌多金属元素异常强度大,可以作为鄂西地区铅锌多金属矿下一步找矿勘查重点区。The spatial distribution of ore-forming elements can reflect their enrichment regularity.Geochemical anomaly districts of Pb-Zn elements,furthermore main ore-forming elements paragenetic association and their geochemical anomaly association,are delineated by statistic analysis（including factor analysis et al.） of the stream sediment geochemical survey data in western Hubei province,which will provide useful information for the prospecting of Pb-Zn polymetallic deposits in this area.The results shows that Pb-Zn geochemical anomaly is mainly found in Qingfeng fault nearby,Shenlongjia district,Huangling anticline circumference,Hefeng area,and southern Enshi district.The close genetic relationship among Pb,Zn,Cu,and Mn elements are found by factor analysis,which can be explained by the strong mineralization of Pb-Zn polymetallic in this area.The Qingfeng fault nearby,Shenlongjia district and southern Enshi district which have strong Pb-Zn polymetallic elements anomaly could be priority considered as further Pb-Zn polymetallic deposits prospecting area in western Hubei province.

关 键 词：地球化学异常 累计频率 因子分析 铅锌矿 鄂西地区 

分 类 号：P632.2[天文地球—地质矿产勘探]