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南岭萤石矿床成矿规律及成因
Received:May 17, 2019  Revised:November 11, 2019  点此下载全文
Cite This Paper:FANG Guicong,WANG Denghong,CHEN Yuchuan,HUANG Fan,WANG Yan,WU Jiaxu,HU Shifu.2020.Metallogenic regularities and genesis of the fluorite deposits in Nanling region[J].Acta Geologica Sinica,94(1):161-178
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Author NameAffiliationE-mail
FANG Guicong 1) MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing, 1000372) Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration, College of Earth Science, Guilin University of Technology, Guilin, Guangxi, 541004 fanggcong@163.com 
WANG Denghong 1) MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing, 100037  
CHEN Yuchuan 3) Chinese Academy of Geological Sciences, Beijing, 100037  
HUANG Fan 1) MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing, 100037  
WANG Yan 1) MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing, 100037  
WU Jiaxu 2) Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration, College of Earth Science, Guilin University of Technology, Guilin, Guangxi, 541004  
HU Shifu 4) Zhejiang Geological Exploration Bureau for Non ferrous Metals, Shaoxing, Zhejiang, 312000  
基金项目:本文为中国地质调查局中国矿产地质志项目(编号 DD20160346、DD20190379)、国家自然科学基金项目(编号 41802082)、国家重点研发计划课题(编号 2016YFC0600208)、广西找矿突破战略行动地质矿产勘查项目联合资助成果。
中文摘要:南岭成矿带是我国最重要的萤石矿聚集区之一。本文从矿床类型、空间分布格局、成岩成矿时代、稀土元素组成、成矿流体特征、成矿物质来源、矿床成因等方面对区内萤石矿床进行了研究与总结。南岭萤石矿床的数量东多西少,储量则是“中间大,两头小”,矿床类型中亚带以伴生型为主,东亚带和西亚带主要为单一型。成矿时限介于160~100 Ma之间,集中在160~135 Ma,由中亚带向西亚带和向东亚带有变年轻的趋势。单一萤石矿床以大气降水为主的成矿热液沿破碎带循环、淋滤,使花岗岩中的F以及地层中的Ca再次活化、富集、重结晶成矿,成矿相对于成岩具有较为明显的滞后性,时差为10~20 Ma。伴生型萤石矿床首先经历岩浆 热液 成矿作用,由花岗岩浆的F与地层的Ca结合形成,成岩与成矿作用近于同步,后期又经历了大气降水改造和重结晶。
中文关键词:萤石矿床  战略性新兴矿产  成矿规律  矿床成因  南岭成矿带
 
Metallogenic regularities and genesis of the fluorite deposits in Nanling region
Abstract:Nanling region is one of the most important fluorite ore- concentrated rich areas in China. In this study, mineralization styles, spatial distribution, geochronology, rare earth element composition, ore- forming fluids and genesis of fluorite deposits in this region are systematically investigated. Fluorite deposits decrease in number from the eastern to the western subzone, and most of the reserves are concentrated in the middle subzone. The middle subzonemainly hosts the associated type mineralization, while the single type fluorite deposits are commonly found in the eastern and western subzones. Their ages range between 160~100 Ma with a peak between 160 Ma to 135 Ma. Deposits in middle subzone are older than that those inthe eastern and western subzones. The single type fluorite deposits have significant time lag between mineralization and its associated granite emplacement (10~20 Ma). They are considered to have crystallized from meteoric waters which constantly leached and enriched fluorine from granite and calcium from strata. The associated type fluorite deposits were primarily produced by magmatic hydrothermal activity.
keywords:fluorite deposit  strategic mineral of emerging industries  metallogenic regularities  metallogenic genesis  Nanling metallogenic belt
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