矿床地质2017，Vol.36Issue(5)：1169-1184,16.DOI:10.16111/j.0258-7106.2017.05.008
贵州普定五指山地区铅锌矿床成矿模式
Metallogenic model of Pb-Zn deposits in Wuzhishan area, Puding City,Guizhou Province
摘要
Abstract
The Wuzhishan Pb-Zn ore concentration area,located in northwestern Guizhou,is an important part of the Sichuan-Yunnan-Guizhou Pb-Zn metallogenic domain.In recent years,numerous large and medium-sized Pb-Zn deposits have been discovered in this area,with more than 2.5 million tons of Pb + Zn metal reserves.Based on geological and geochemical studies and comparative analysis of the typical Pb-Zn deposits,the authors revealed that orebodies in this area are mainly hosted in dolostone of the late Sinian Dengying Formation and early Cambrian Qingxudong Formation.Orebodies occur dominantly in stratiform and steeply dipping veined forms along the faults.The fault control and layer control features are obvious.Ores are predominated by unaltered sulfides,and mainly consist of sphalerite and galena in the Wuzhishan area.Pb-Zn mineralization is controlled by tectonics,lithology and sedimentary facies,with the tectonics being the necessary and main ore-controlling factor.The ore-bearing Dengying and Qingxudong Formations are favorable lithologic units and the dolostone is favorable ore-hosting rock.The restricted to semi-restricted platform to lagoon facies are favorable sedimentary lithofacies.Ore-forming Pb,Zn metals were derived from basement rocks,whereas C and S were most likely sourced from the marine carbonate rocks and evaporation gypsum within ore-hosting strata,respectively.The ore-forming fluids belonged to low-temperature medium-to low-salinity basin brine that was related to evolution of Youjiang Basin.Pb-Zn deposits in this area were formed by metal-enriched fluids mixed with S-enriched fluids in the transition environment from collisional to extensional tectonics.The ore-forming process is similar to that of MVT deposits.The establishment of metallogenic model in Wuzhishan area is expected to promote new breakthrough in ore-prospecting in this area and provide theoretical guidance for the adjacent areas.关键词
地质学/成矿地质条件/成矿物质来源/成矿模式/五指山背斜/川滇黔接壤铅锌矿集区Key words
geology/metallogenic geological conditions/source of ore-forming materials/metallogenic model/Wuzhishan anticline/Sichuan-Yunnan-Guizhou Pb-Zn metallogenic domain分类
天文与地球科学引用本文复制引用
金中国,周家喜,郑明泓,彭松,黄智龙,刘玲..贵州普定五指山地区铅锌矿床成矿模式[J].矿床地质,2017,36(5):1169-1184,16.基金项目
本文受国家重点基础研究发展规划项目(编号:2014CB440905)、国家自然科学基金重点项目(编号:41430315)和国家“十二五”科技支撑重点计划项目(编号:2011BAB04804)联合资助 （编号:2014CB440905）
