丰宁县吴家营银多金属矿地质特征及找矿前景分析.pdf
Vol.42No.5中国资源综合利用
2024年5月ChinaResourcesComprehensiveUtilization综合利用
丰宁县吴家营银多金属矿地质特征及找矿前景分析
王倩,刘仕刚,董帅
(天津华北地质勘查总院有限公司,天津300170)
摘要:丰宁满族自治县(简称丰宁县)吴家营银多金属矿位于华北地台北缘内蒙古地轴中段,区域断裂构
造活动和燕山期岩浆热液活动频繁,成型的银铅锌矿分布众多。矿区共圈出7条蚀变矿化体及7条Cu、
Pb、Ag多金属矿体,矿体主要呈脉状集中分布于斑状二长花岗岩中,多为西北向平行展布矿体。矿床成因
类型为与燕山晚期中酸性侵入岩有关的受构造控制的中低温热液矿床。以丰宁县吴家营银多金属矿为例,
结合区域地质背景和矿床地质特征,分析矿床成因,从而指导后续找矿工作。研究认为,研究区深部可能
存在大脉状矿体,具有一定的找矿前景。
关键词:银多金属矿;地质特征;找矿前景;丰宁县
中图分类号:P618.2文献标识码:A文章编号:1008-9500(2024)05-0123-03
D0I:10.3969/j.issn.1008-9500.2024.05.031
AnalysisonGeologicalCharacteristicsandProspectingProspectsof
WujiayingSilverPolymetallicDepositinFengningCounty
WANGQian,LIUShigang,DONGShuai
(TianjinNorthChinaGeologicalExplorationGeneralInstitute,Tianjin300170,China)
Abstract:TheWujiayingsilverpolymetallicdepositinFengningmanchuautonomouscounty(referredtoasFengning
county)islocatedinthemiddlesectionoftheInnerMongoliaaxisonthenorthernedgeoftheNorthChinaplatform,and
theregionalfaulttectonicactivityandYanshanianmagmatichydrothermalactivityarefrequent,andtheformedsilver-
lead-zincdepositsarewidelydistributed.Atotalof7alteredmineralizationbodiesand7Cu,Pb,Agpolymetallicore
bodieshavebeendelineatedintheminingarea,andtheorebodiesaremainlydistributedinaveinlikemannerinthe
porphyrydiorite,mostlyparalleltothenorthwest.Thegenetictypeofthedepositisatectoniccontrlledmediumtolow
temperaturehydrothermaldepositrelatedtothelateYanshanintermediateacidicintrusiverocks.TakingtheWujiaying
silverpolymetallicdepositinFengningcountyasanexample,combinedwiththeregionalgeologicalbackgrounda