内蒙古大型银矿集区地球化学预测  

Geochemical Prognosis of Large-size Silver Ore Districts in Inner Mongolia

作　　者：申伍军[1] 王学求[1] 

机构地区：[1]中国地质科学院地球物理地球化学勘查研究所,河北廊坊065000

出　　处：《地球学报》2010年第3期449-455,共7页Acta Geoscientica Sinica

基　　金：国家973课题(编号:2007CB411406);内蒙古地质勘查基金项目(编号:07-3-KC48)联合资助

摘　　要：如何利用地球化学填图数据预测潜在大型矿集区是寻找大型矿床亟待解决的问题。本文利用1:20万区域化探扫面数据和1:100万中蒙边界地球化学填图数据进行综合研究,在全区共圈出面积大于1000km2银的地球化学省40个,其中具有良好Ag-Pb-Zn综合异常的有31处。内蒙已发现的4处大型银矿有3处位于地球化学省内,已发现的11处中型银矿有10处位于地球化学省或区域异常内,这说明大型银矿与地球化学省有高度的相关性。大型银矿区银异常强度(异常内银平均含量/背景含量)大于1.5。利用面金属量模型和地球化学块体模型对31处潜在的大型银矿区的潜在资源量进行了预测。Silver ore districts were predicted on the basis of geochemical provinces delineated by two datasets of 1：200000 and 1：1000000 geochemical data in Inner Mongolia.40 silver geochemical provinces（each one has an area of over 1000 km2） were delineated in the whole territory of Inner Mongolia.3 of 4 large-size silver ore deposits are hosted by the geochemical provinces,and 10 of 11 middle-size silver deposits are hosted by geochemical provinces or regional anomalies.This fact indicates that there exists good correlation between large-size and middle-size ore deposits and geochemical provinces.Geochemical provinces can therefore be applied to the prognosis of potential large-size ore deposits.31 Ag anomalies are associated with elements of Pb,Zn,Cu,with anomalous contrast higher than 1.5.Potential silver reserves were calculated by using the areal metal productivity model and the geochemical block model.

关 键 词：大型银多金属矿 地球化学 预测 内蒙古 

分 类 号：P578.11[天文地球—矿物学] P622.3[天文地球—地质学]