华南早侏罗世花岗质侵入体的岩石成因及构造背景——兼论其关键金属成矿作用贾小辉1,2，李响1,2，杨文强1JIAXiao-Hui1,2,LIXiang1,2,YANGWen-Qiang11.中国地质调查局武汉地质调查中心（中南地质科技创新中心），湖北武汉，430205；2.中国地质调查局花岗岩成岩成矿地质研究中心，湖北武汉，4302051.WuhanCenter,ChinaGeologicalSurvey(GeosciencesInnovationCenterofCentralSouthChina),Wuhan430205,Hubei,China;2.ResearchCenterforPetrogenesisandMineralizationofGranitoidRocks,ChinaGeologicalSurvey,Wuhan430205,Hubei,China摘要：华南早侏罗世花岗岩及其形成的构造背景是备受地质学者关注的焦点问题之一。本文在系统收集华南地区早侏罗世花岗质侵入岩的时空分布、岩体地质和地球化学特征等资料的基础上，探讨它们的岩石成因及幔源基性岩浆在花岗质岩浆形成过程中的贡献。结果显示，华南早侏罗世花岗质侵入岩总体上呈面状展布，在赣南-粤北地区相对密集，其形成时代主要集中于185~190Ma。华南早侏罗世花岗岩以A型花岗岩为主，幔源物质贡献明显，其形成于印支造山运动晚阶段的后造山伸展环境。简要概述了华南与早侏罗世侵入岩有关的铀矿、铁锡矿及REE-Nb-Ta矿等关键金属成矿作用。关键词：早侏罗世；花岗岩；岩石成因；构造背景；关键金属；华南中图分类号：P581文献标识码：A文章编号：2097-0013（2023）02-0186-17JiaXH,LiXandYangWQ.2023.PetrogenesisandTectonicSettingofTheEarlyJurassicGra⁃niticPlutonsinSouthChina:ADiscussiononMineralizationofCriticalMetals.SouthChinaGeology,39(2):186-202.Abstract:OneofthefocusesconcernedbygeologistsistheEarlyJurassicgranitesinSouthChinaandtheirtectonicsetting.Onbasisofsystematicallycollectingthedataofspatiotemporaldistribution,geologicalchar-acteristicsandgeochemicalcompositionsoftheEarlyJurassicgraniticintrusiverocksinSouthChina,wedis-cussthepetrogenesisofthesegranites,andthecontributionofmantle-derivedmaficmagmaintheformationofgraniticmagma.TheresultsindicatethattheEarlyJurassicgraniticintrusiverocksaregenerallydistribut-edinaplaneshape,andarerelativelydenseinsouthernJiangxiandnorthernGuangdong,withthemainlyfor-mationagesof185~190Ma.ThegranitesinSouthChinaaredominatedbyA-typegranites,withobviouscon-tributionsfrommantle-derive...
