西藏邦卓玛地区土壤地球化学特征及找矿预测  

Geochemical Characteristics of Soil and Prospecting Prediction of the Bangzhuoma Region,Tibet

作　　者：袁和[1] 罗先熔[1] 李武毅 陈武[2] 

机构地区：[1]桂林理工大学地球科学学院,广西桂林541004 [2]武警黄金第十一支队,西藏拉萨850000

出　　处：《地质与勘探》2017年第3期472-481,共10页Geology and Exploration

基　　金：中国地质调查局项目(编号1212011121236);武警黄金指挥部项目(编号DZKY2016-186);国家重点研发计划项目(编号2016YF060063-3)联合资助

摘　　要：本文通过在西藏邦卓玛地区开展的1∶10000土壤地球化学测量工作,运用元素的变化系数、元素富集离散特征对邦卓玛地区土壤地球化学测量的12种微量元素进行地球化学统计分析,论述了12种微量元素的成矿潜力,得出Au、Ag、W、Pb、Sb 5种元素具有较大的成矿潜力。并通过相关分析、因子分析确立了测区内元素组合特征,共划分了三组主成矿元素组合(即Au-Ag-Cu-Bi-W;PbSn;Sb),运用衬值异常法在区内圈定组合异常,结果显示,组合异常明显,异常套合较好,大体呈NW向串珠状展布。根据组合衬值异常叠加,在研究区内圈定了4个重点靶区,为下一步在该区内寻找Au、Ag、Sb、W、Pb等多金属矿提供了理论依据。Based on a 1：10000 geochemical soil survey in the Bangzhuoma area of Tibet, this work carried out a geochemistry statistic analysis on 12 kinds of microelements from the survey using element variation coefficients and enrichment and discrete characteristics, and discussed the metallogenetic potentials of the 12 kinds of mieroelements. It was concluded that the five elements of Au, Ag, W, Pb, and Sb have great ore -forming potentials. By correlation and factor analyses, we established the combination characteristics of elements in the area, which can be divided into Au - Ag - Cu - Bi - W, Pb - Sn, and Sb . Meanwhile, by using the contrast value anomaly method, this article delineates the combination anomaies in this area. The results show obvious combined anomalies which match well with each other, roughly distributed in NW direction with a monilform shape. This work also delineated four important target areas on the basis of combined contrast anomaly superposition, which provide theoretical evidence for the next work of searching for muhi - metals including Au, Ag, Sb, W, and Pb in this area.

关 键 词：元素地球化学特征 衬值异常法 找矿前景 邦卓玛地区 西藏 

分 类 号：P632.1[天文地球—地质矿产勘探] P612[天文地球—地质学]