Metallogenetic Specialization of the Fluorite-bearing Granites in the Northern Part of the Eastern Nanling Region
南岭东段北部花岗岩的萤石成矿专属性研究
作者: FANG GuicongWANG DenghongCHEN ZhenyuCHEN ZhenghuiZHAO ZhengGUO NaxinCollege of Earth Science, Guilin University of TechnologyChinese Academy of Geological SciencesMLR Key Laboratory of Metallogeny and Mineral Resources Assessment,Institute of Mineral Resources, Chinese Academy of Geological Sciences
刊名: Geotectonica et Metallogenia, 2014(02), pp.312-324
中文刊名: 大地构造与成矿学, 2014(02), pp.312-324
来源数据库: CJFDTEMP_U
DOI: CNKI:SUN:DGYK.0.2014-02-011
关键词: the Nanling regionfluorite depositgranitegeochemistrybiotiteelectron probe microanalysismetallogenetic specialization
中文关键词: 南岭萤石矿花岗岩地球化学黑云母电子探针成矿专属性
英文摘要: Fluorite deposits in the northern part of the eastern Nanling region are intimately associated with granitic intrusions. To investigate their fluorite-metallogenetic specialization, the chemical compositions of biotites and whole rock of the granites were analyzed. The granites are divided into two groups: fluorite-bearing and fluorite-barren granites. The fluorite-bearing granites are mainly biotite granites, high potassium calc-alkaline, whose accessory minerals commonly include fluorite. The fluorite-bearing granites have higher Mo contents and lower Th/U ratios than those of the fluorite-barren counterparts. Biotite in the fluorite-bearing granites is ferruginous biotite and siderophyllite biotite, which are characterized by higher contents of TiO2, MgO, Cl, and F and lower contents...
中文摘要: 为了探讨花岗岩的萤石成矿专属性特征,在系统搜集前人成果基础上,对南岭东段北部产萤石花岗岩和非产萤石花岗岩开展了元素地球化学测试和黑云母电子探针分析(EPMA)与对比。结果表明:产萤石花岗岩主要为黑云母花岗岩,属于高钾钙碱性系列,副矿物组合中常见萤石;加里东期、印支期和燕山期的花岗岩均具有形成萤石矿床的可能性,以燕山早期花岗岩的潜力最大。与非产萤石花岗岩相比,产萤石花岗岩具较高的Mo含量和较低的Th/U比值;其黑云母主要为铁质黑云母和铁叶云母,比非产萤石花岗岩的黑云母(主要为铁白云母和铁叶云母)更富TiO2、MgO、Cl、F而贫Al2O3、FeO+Fe2O3;黑云母的F与Cl含量呈正相关,而与Al2O3含量呈负相关;产萤石花岗岩形成于相对高温、低压和高氧逸度的环境,岩浆来源主要为地壳,但有少量幔源,与钨多金属矿床关系较为密切。
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