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时间:2020-03-23
《南非维特沃特斯兰德盆地绍斯迪普金矿床地质特征、成矿模式和找矿模型.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第34卷第6期地质通报Vo1.34.No.62015年6月GEoLoGICALBULLETINOFCHINAJun.,2015南非维特沃特斯兰德盆地绍斯迪普金矿床地质特征、成矿模式和找矿模型任军平,许康康,相振群,左立波,王杰,刘晓阳,何胜飞,刘宇,贺福清RENJunping,XUKangkang,XIANGZhenqun,ZUOLibo,WANGJie,LIUXiaoyang,HEShengfei,LIUYu,HEFuqing天津地质矿产研究所,天津300170TianfinInstituteofGeology
2、andMineralResources,Tianjin300170,China摘要:对南非兰德砾岩型金矿床的研究成果进行总结,概括了绍斯迪普金矿床的区域地质背景、岩石地层划分,较为系统地分析了矿床的地质特征和矿床成因。得出如下结论:①金的主要来源可能与太古宙含金花岗绿岩带有密切关系;②金矿体主要受太古宙文特斯多普砾岩地层和中兰德群中的Turfontein亚群埃尔斯伯格组砾岩地层控制;③金矿床可能经历了早期沉积成岩成矿阶段一后期改造富集多个(Klipriviersberg火山活动作用时期和与2050Ma布什维尔德杂
3、岩体有关的变质作用高峰时期)阶段,为复合成因的层控改造型矿床。研究结果对该类矿床的深入研究和走出去的中国企业有重要的参考价值。关键词:兰德砾岩型金矿床;绍斯迪普金矿床;矿床成因;兰德盆地;南非中图分类号:P618.51;P611文献标志码:A文章编号:1671—2552(2015)06—1217—10RenJP,XuKK,XiangZQ,ZuoLB,WangJ,LiuXY,HeSF,LiuY,HeFuQ.Geologicalcharacteristics,metallogenicmodelandprospecti
4、ngcriteriaoftheSouthDeepgolddepositinWitwatersrandBasin,SouthAfrica.GeologicalBulletinofChina,2015,34(6):1217—1226Abstract:Inthispaper,theauthorshavesummarizedalotofpreviousresearchresultsofWitwatersrandconglomeratetypegoldde-positsinSouthAfrica,summedupregio
5、nalgeologicalbackgroundandlithostratigraphicclassificationoftheSouthDeepgolddeposit,andmadeasystematicanalysisofthegeologicalcharacteristicsandgeneticfeaturesofthisoredeposit.Basedonalotofevidence,theauthorshavereachedthefollowingconclusions:Themainsourceofgo
6、ldwasprobablycloselyrelatedtOArcheangold—beatinggranite—greenstone;②GoldorebodiesaremainlycontrolledbyArchaeozoicVentersdorpContactReefandElsburgFormationofTurfonteinSubgroupinCentralRandGroupconglomeratestrata;~Thegolddepositmighthaveexperiencedearlysediment
7、arydia—geneticore—formingstageandlatemultiplestage(Klipriviersbergvolcanicactivityperiodand2050MametamorphismpeakperiodofBushveldIgneousComplex)andhenceshouldbelongtOthestrataboundmodificationdepositwichcomplexgenesis.Theresultsob—tainedbytheauthorsareofimpor
8、tantreferencevalueforin—depthStUdyoforedepositsandimplementationof‘goingOUt’policyofChineseenterprises.Keywords:Witwatersrandconglomeratetypegolddeposit;SouthDeepgolddeposit;oregenesis;Wi
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