地质通报2024，Vol.43Issue(6)：914-925,12.DOI:10.12097/gbc.2022.11.035
滇东南南温河钨矿床成因和成矿时代:来自矿床地质特征和Sm-Nd同位素年龄的证据
Genesis and geochronology of the Nanwenhe tungsten deposit,southeast Yunnan:Evidence from geological features and Sm-Nd isotopic age
摘要
Abstract
The Nanwenhe tungsten deposit is the largest scheelite deposit in southeast Yunnan.Since the Caledonian period,the area has been subjected to multi-stage tectonic-metamorphism.This has led to different understanding of key issues such as deposit genesis and metallogenic age.On the basis of detailed field geological work,combined with the results of previous work,it is considered to be a skarn scheelite deposit controlled by magmatic-hydrothermal fluid,and the ore-forming fluid is a magmatic-hydrothermal transitional fluid,which is characterized by"cross-bedding"and"bedding"quartz veins-feldspar quartz veins,and controls the skarnization and scheelite mineralisation of the Nanwenhe tungsten deposit.The laminated and stratiform skarn ore bodies revealed by the current exploration work are the products of bedding metasomatism of"mag～hydrothermal transition ore-forming fluid".The Sm-Nd isotopic dating of the scheelite in the Nanwenhe tungsten deposit yield a metallogenic age of 126±6.7 Ma(n=7,MSWD=0.33),which corroborates well with the tectonic research results and other chronological results in the area,indicating that the mineralization is related to the late Yanshan magmatic activity.The geological characteristics and Sm-Nd isotopic age of the deposit indicate that the Nanwenhe tungsten deposit is a skarn scheelite deposit controlled by the late Yanshanian magmatic-hydrothermal system.关键词
滇东南地区/南温河钨矿/矿床成因/成矿年代学Key words
southeast Yunnan/Nanwenhe tungsten deposit/genesis of ore deposit/metallogenic chronology分类
天文与地球科学引用本文复制引用
李顺庭,祝新友,路增龙,张定才,韩胜康,蒲兴明,李孝光..滇东南南温河钨矿床成因和成矿时代:来自矿床地质特征和Sm-Nd同位素年龄的证据[J].地质通报,2024,43(6):914-925,12.基金项目
文山麻栗坡紫金钨业集团有限公司委托项目《云南麻栗坡县南温河钨矿成矿规律总结与找矿潜力评价研究》(编号:KCDZKCY-2021-005) （编号:KCDZKCY-2021-005）
