摘要
宝山Cu-Pb-Zn多金属矿是湘南多金属矿集区代表性矿床之一,其成矿地质条件优越。为维系该矿山的可持续性发展,需要在深部(-400 m以下)和边部探寻新的接替资源,以提供更多的资源保障。本文通过对区内矿床类型的分布特征、地质钻探与坑探、岩矿分析与化学测试、物化探新方法探测技术等多元找矿地学成果信息、矿产富集规律及找矿预测靶区等资料的分析,总结该矿区深边部保障性资源的分布情况。结果表明,该矿床成因类型主要为岩浆期后高中温热液接触交代矽卡岩型铜多金属矿床和中低温热液裂隙充填交代型铅锌银矿床,空间分布上,以岩体为中心,自岩体与围岩接触带向外,依次形成接触交代矽卡岩型Cu矿或Cu-Mo-W-Bi矿床→交代矽卡岩型Cu-Pb-Zn矿床→裂隙交代充填型Pb-Zn-Ag矿床或Ag-Mn矿床等。将矿区深边部成矿有利地段划分为既相对独立又相互关联的3个找矿预测靶区,以期为矿山深边部新一轮接替资源找矿提供全新的思路。
Baoshan Cu-Pb-Zn polymetallic deposit is one of the representative deposits in South Hunan polymetallic ore concentration area,with the superior ore-forming geological condition.In order to maintain the sustainable development of Baoshan lead-zinc-silver mine,it is necessary to search for new replacement resources in the depth(below-400 m)and the edge in order to provide more resource guarantee.According to the distribution characteristics of Cu-Pb-Zn polymetallic deposit types,geological drilling and tunnel prospecting,rock and mineral analysis and chemical testing data,new geophysical and geochemical exploration information,etc.,the distribution of supportable resources in the deep edge of the mining area is studied by analyzing the regularity of mineral enrichment and prospecting target areas.The study result shows that the genetic types of the deposits are mainly skarn-type copper-polymetallic deposit of high and medium temperature hydrothermal contact metasomatism and lead-zinc-silver deposit of medium and low temperature hydrothermal fissure filling metasomatism after magmatic period.In terms of spatial distribution,with the rock mass as the center,from the contact zone between the rock mass and surrounding rock outward,contact metasomatic skarn type Cu deposit or Cu-Mo-W-Bi deposit→metasomatic skarn type Cu-Pb-Zn deposit→fissure metasomatic filling type Pb-Zn-Ag deposit or Ag-Mn deposit are formed.The study also divides the favorable ore-forming areas in the deep edge of the mine area into three relatively independent and interrelated target areas for prospecting and prediction.The new idea is provided for the exploration of superseding resources in the deep edge of the mine in a new round.
作者
宋之方
张鹏飞
杨齐智
何庆瑞
SONG Zhifang;ZHANG Pengfei;YANG Qizhi;HE Qingrui(Hunan Mineral Resources Investigation Institute,Changsha 410129,Hunan,China;Hunan Baoshan Nonferrous Metals Mining Co.,Ltd.,Guiyang 424400,Hunan,China)
出处
《矿产与地质》
2023年第6期1154-1162,共9页
Mineral Resources and Geology
基金
湖南宝山有色金属矿业有限责任公司项目“湖南省桂阳县宝山矿区宝山铅锌银矿-400 m以下深部详查”(编号:321001001)资助。
