高校地质学报2017，Vol.23Issue(3)：431-441,11.DOI:10.16108/j.issn1006-7493.2016205
云南石屏热水塘铅锌矿床地球化学特征与成矿作用
Geochemical Characteristics and Metallogenesis of the Reshuitang Pb-Zn Deposits in Carbonate Rocks, Shiping, Yunnan Province, China
摘要
Abstract
The Reshuitang Pb-Zn deposits is hosted in different layers of the Pre-sinian,Sinian and Cambrian carbonate rocks in Reshuitang Shiping,Yunnan.The ore bodies mainly occur as bedded,near bedded,nervations or lenticular.Ore minerals mainly behave in forms of filling action with minerals such as sphalerite,galena,whereas the gangue minerals are mainly quartz,calcite,and dolomite.Geochemical study shows that the background level of metallogenetic elements are several ten times higher than those in similar rocks.The compositions of calcite C,O isotopes show that the ore-forming fluids were mainly produced by dissolution of marine carbonate.The range of δ34S values is relative large(-7.2‰ ～27.97‰),which shows that the sulfur in the ore-forming fluids were the products of thermo-chemical sulfate reduction.The ratios of 206Pb/204Pb,207Pb/204Pb,208Pb/204Pb are 17.43 ～ 18.768,15.441 ～15.946 and 37.061 ～ 38.628,respectively.The host rocks and the underlying strata may have provided ore-forming material for mineralization and Pb has a variety of sources such as the upper crust and the orogenic belt.The Rb and Sr isotopic age are calculated to be 205.9 ± 3.3 Ma,a late Indosinian metallogenic age.The geochemical evidence suggests that the source for the ore-formation metals and fluids of the Reshuitang Pb-Zn deposits is a mixed product and the ore deposits were formed in the late Indosinian,and the ore deposit is a sedimentary reworked type of hydrothermal deposits.关键词
矿床地球化学/年代学与成矿年代/成矿作用/热水塘铅锌矿床Key words
geochemistry of ore deposits/geochronology and metallogenic epoch/mineralization/reshuitang Pb-Zn deposits分类
天文与地球科学引用本文复制引用
王文元,高建国,刘心开,侬阳霞,陈欣彬..云南石屏热水塘铅锌矿床地球化学特征与成矿作用[J].高校地质学报,2017,23(3):431-441,11.基金项目
国家自然科学基金项目(41272111) （41272111）
