华南地区三叠纪矿床地质特征、成矿规律和矿床模型  

Triassic deposits in South China:Geological characteristics,ore-forming mechanism and ore deposit model

作　　者：谢桂青 毛景文[1,2] 张长青 李伟[2] 宋世伟[1] 章荣清[3] XIE Guiqing;MAO Jingwen;ZHANG Changqing;LI Wei;SONG Shiwei;ZHANG Rongqing(Institute of Earth Sciences,China University of Geosciences(Beijing),Beijing 100083,China;Ministry of Natural Resources Key Laboratory of Metallogeny and Mineral Assessment,Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing 100037,China;State Key Laboratory for Mineral Deposits Research,School of Earth Sciences and Engineering,Nanjing University,Nanjing 210023,China)

机构地区：[1]中国地质大学(北京)科学研究院,北京100083 [2]中国地质科学院矿产资源研究所,自然资源部成矿作用与资源评价重点实验室,北京100037 [3]南京大学地球科学与工程学院,内生金属矿床成矿机制研究国家重点实验,江苏南京210023

出　　处：《地学前缘》2021年第3期252-270,共19页Earth Science Frontiers

基　　金：国家自然科学基金项目(41925011,41820104010);国家重点基础研究发展计划“973”项目课题(2014CB440902)。

摘　　要：华南以中生代成矿大爆发为特征,燕山期矿床成矿规律的研究程度较高,近年来发现越来越多的三叠纪矿床,但三叠纪矿床的分布规律和矿床模型是值得关注的重要科学问题。本文基于最新研究成果,论述华南三叠纪矿床地质特征和矿床类型,提出成矿规律,初步地建立成矿动力学模型。华南地区三叠纪矿床分布较为广泛,目前确定的46个三叠纪矿床分布于5个区带,形成于晚三叠世(230~200 Ma),被划分为花岗岩有关的钨锡多金属矿床、侵入岩有关的远端金锑矿床、卡林型金矿床和MVT型铅锌矿床4种主要类型。在空间上,华南三叠纪矿床存在成矿元素分带性,由西向东依次为MVT型铅锌矿床、卡林型金矿床、侵入岩有关的远端金锑矿床、花岗岩有关的钨锡多金属矿床。华南5个成矿区带普遍存在印支期和燕山期的叠加成矿作用,在南岭西段桂北苗儿山—越城岭和滇东南老君山地区还发育加里东和印支期的叠加成矿作用。South China is characterized by intensive,large-scale Mesozoic metal mineralization.The mechanism of ore formation during the Yanshanian period has been well studied.Recently,plentiful Triassic deposits have been discovered or recognized in South China,however,few studies are focused on their regional distribution pattern and ore deposit model.In this study,the geological characteristics,spatial-temporal distribution pattern and metallogeny of these Triassic deposits are summarized.So far,forty-six deposits of Late Triassic(230-200 Ma)have been discovered,mostly in five regions of South China.These deposits can be subdivided into four types based on mineralization styles.They,showing a zonal distribution from east to west,are the granite-related W-Sn deposits,the intrusion-related distal Au-Sb deposits,the Carlin-type Au deposits,and the MVT Pb-Zn deposits.The granite-related W-Sn deposits are situated to the south of the Carlin-type Au deposits.Multiple mineralization events took place within a single region as overprinting mineralization in the Indosinian and Yanshanian periods is commonly found in all five regions,and overprinting mineralization in the Caledonian and Indosinian periods was found in the Miaoershan-Yuchengling district of western Nanling and in the Laojunshan district of southeastern Yunan Province.

关 键 词：三叠纪 花岗岩有关的钨锡矿床 侵入岩有关的远端金锑矿床 卡林型金矿床 MVT铅锌矿 成矿规律 矿床模型 华南地区 

分 类 号：P612[天文地球—矿床学] P611[天文地球—地质学]