内蒙古大兴安岭地区银铅锌多金属矿找矿新进展及勘查前景分析

New Prospecting Progress of Ag-Pb-Zn Polymetallic Deposits and Exploration Prospect in the Daxing’Anling Region of Inner Mongolia

近十年来,内蒙古大兴安岭地区银铅锌多金属矿勘查取得了一系列新进展,相继发现和探明了二道河、上坑锅、八岔沟西、花脑特、白音查干东山等大型矿,正在勘查的巴尔陶勒盖、1017高地和乌兰陶勒盖东等矿具有特大型远景规模。本文在以往研究的基础上,通过对近几年新发现典型银铅锌多金属矿床特征的对比研究,运用区域成矿学理论,初步总结内蒙古大兴安岭地区银铅锌多金属矿的区域成矿规律。研究认为除了热液脉型银铅锌多金属矿外,火山-次火山岩型银铅锌多金属矿已成为内蒙古大兴安岭地区最重要的矿床类型之一,成矿时代主要在晚侏罗世-早白垩世,寻找大型和特大型火山-次火岩热液型银铅锌多金属矿的潜力巨大。

Over the past ten years,a series of new progress has been made in prospecting Ag-Pb-Zn polymetallic deposits in the Daxing Anling region of Inner Mongolia.For example,the large-scale Erdaohe deposit,Shangkengguo deposit,the west of Bachagou deposit,the Huanaote deposit,and the east mountain of Baiyinchagan deposit have been discovered and proven successively.The Buertaolegai,1017 Highland and the east of Wulantaolegai deposits are under exploration with a good prospect of ultra-large scales.Based on the study of the typical Ag-Pb-Zn polymetallic deposits in recent years,this work preliminarily summarized the regional metallogenic regularity of Ag-Pb-Zn polymetallic deposits in the Daxing Anling region of Inner Mongolia by using the regional metallogenic theory.It is suggested that in addition to hydrothermal vein type Ag-Pb-Zn polymetallic deposits,volcanic-subvolcanic Ag-Pb-Zn polymetallic deposits have become one of the most important deposit types in this region,and the metallogenic age is mainly from Late Jurassic to Early Cretaceous,indicative of a great prospecting potential of large and super-large volcano-subvolcanic hydrothermal deposits.