西藏墨竹工卡县过经拉地区土壤地球化学特征及找矿预测  

Pedogeochemical characteristics and prospecting forecast of Guojingla area in Mozhugongka of Tibet

作　　者：吴小雷[1] 迟占东[1] 徐庆鸿[1] 张学良[1] 杨英[1] 曹军[1] 

机构地区：[1]中国有色桂林矿产地质研究院有限公司,广西桂林541004

出　　处：《矿产与地质》2015年第6期787-792,共6页Mineral Resources and Geology

基　　金：班公湖-怒江成矿带矿产资源遥感综合调查(编号:基【2010】矿评03-04-01);西藏霞钰矿业开发有限公司找矿项目资助

摘　　要：通过对西藏墨竹工卡县过经拉地区进行1∶2000地质填图工作、1∶1万土壤地球化学测量工作,总结了过经拉地区地层、岩性、构造、矿化及围岩蚀变等地质特征。微量元素地球化学参数统计及元素分布型式显示,研究区中Pb、Ag、W元素在成矿作用过程中具有强烈的富集趋势。因子分析、聚类分析等多元统计分析表明,Pb、Zn、Ag元素代表主要成矿元素的富集组合,可作为本区较好的找矿指示元素。根据土壤地球化学异常特征,本区新发现3个异常区,并对各个异常进行解释评价。综合分析断裂构造、岩浆活动、矿化蚀变特征及土壤地球化学异常特征,认为该区深部仍有较好的找矿前景。其中找矿重点应在Ⅱ号地球化学异常区。According to the results of the 1∶2000scale geological mapping and the 1∶10000scale pedogeochemical survey of Guojingla area in Mozhugongka of Tibet,this paper summed up the geological characteristics of Guojingla area,such as the stratum,lithology,structure,mineralization and wall-rock alteration.Through the statistical analysis of the geochemical parameters of trace elements and the study of the distribution pattern of elements,results indicated that there was a strong trend of enrichment of elements like Pb,Ag and W during the process of mineralization.It was shown by the results of multivariate statistical analysis such as factor analysis and cluster analysis that elements like Pb,Zn and Ag represented the enrichment combination of the main ore-forming elements,and they were favorable indicator elements for prospecting in this area.Three new geochemical anomaly areas were discovered in the area according to the characteristics of pedogeochemical anomalies,and each anomaly was interpreted and evaluated.On the basis of the comprehensive analysis on the fracture structures,the magmatic activities,the characteristics of mineralization and alteration,and the pedogeochemical anomaly characteristics,it is believed that the deep part of the area has relatively favorable prospecting potential,and the prospecting works shall be focused on the No.II geochemical anomaly area.

关 键 词：土壤地球化学 因子分析 找矿预测 西藏 

分 类 号：Q938.13[生物学—微生物学]