河南栾川西沟层状铅-锌-银矿床地质特征及成因探讨  

Geological characteristics of stratiform lead-zinc-silver deposit in Xigou,Luanchuan,Henan province and its genesis

作　　者：严海麒[1] 裴玉华[1] 宋要武[1] 云辉[1] 

机构地区：[1]河南省地质调查院,郑州450007

出　　处：《矿产与地质》2007年第3期245-250,共6页Mineral Resources and Geology

基　　金：中国地质调查局国土资源大调查豫西南地区铅锌银矿调查评价(199910200227)项目资助

摘　　要：栾川西沟铅-锌-银矿是与中元古界官道口群碳酸盐岩、上元古界栾川群碎屑岩—碳酸盐岩沉积建造有关层状铅-锌-银矿。通过对成矿地质背景、矿床地质特征及成矿物质来源的研究,其结果认为,该层状铅-锌-银矿床在地层同沉积时形成了矿源层和部分硫化物,之后经历了二个成矿期:(1)中—低温热液期,它使得矿源层进一步发展成矿,并对其进行了叠加改造;(2)风化期,该期对已形成的矿体作了轻微的改造,形成小部分氧化矿体。从成矿条件、成矿物质来源及同位素特征来看,该矿床属于热水沉积—叠加改造型层控矿床。The Xigou lead zinc silver deposit of Luanchuan is a stratiform lead zinc and silver deposit associated with the carbonate rocks of Guandaokou Group in Middle Proterozoic Erathem and clastic carbonate rocks of Luanchuan Group in Upper Proterozoic Erathem. Through the study of ore forming geological background, geological characteristics and ore matter sources of the deposit, a conclusion was drawn that an ore source bed and some sulfides were formed during the synsedimentary stage for the stratiform lead zinc and silver deposit, later, it was subject to two mineralization periods： （1） meso-epithermal period, causing the further mineralization of the source bed and superimposed transformation; （2） weathering period, slight transformation on the formed orebodies to form a small part of oxidized orebodies. The deposit belongs to hot water deposition-superimposed transformation stratibond deposit, from the views of ore forming conditions, ore matter source and isotopic characteristics.

关 键 词：层状铅-锌-银矿 矿床成因 地质特征 栾川西沟 河南 

分 类 号：P618.42[天文地球—矿床学] P618.43[天文地球—地质学]