文档介绍：哈萨克斯坦北东天山浅成低温热液型金矿床成矿时代及构造背景* 武广 1,2,3?陈毓川 4?陈衍景 5 WUGuang 1,2,3,CHENYuChuan 4andCHENYanJing 5 1?中国地质科学院矿产资源研究所,北京?100037 2?中国科学院广州地球化学研究所成矿动力学重点实验室,广州?510640 3?河南省灵宝市金源矿业有限责任公司,灵宝?472500 4?中国地质科学院,北京?100037 5?北京大学造山带与地壳演化教育部重点实验室,北京?100871 1?InstituteofMineralResources,ChineseAcademyofGeologicalSciences,Beijing100037,China 2?KeyLaboratoryofMetallogenicDynamics,GuangzhouInstituteofGeochemistry,ChineseAcademyofSciences,Guangzhou510640,China 3?pany,HenanProvince,Lingbao472500,China 4?ChineseAcademyofGeologicalSciences,Beijing100037,China 5?KeyLaboratoryofOrogenandCrustEvolution,MinistryofEducation,PekingUniversity,Beijing100871,China 2010?10?01收稿,2010?11?16改回? WuG,ChenYCandChenYJ?2010?Metallogenicepochandtectonicsettingofepithermalgolddepositsinthenortheastern KazakhstanTianshan?ActaPetrologicaSinica,26(12):3683-3695 Abstract??urrences,suchasArharleiandWurenkebulakedeposits,havebeenfoundinthe northeasternKazakhstanTianshan,whichisoneoftheimportantepithermalgoldmetallogenicbeltsintheCentralAsianOrogenicBelt? Whereas,hronologystudyofthegolddepositsispoor?Totimethemineralization,theauthorsdatedandesiteand andesiticbasaltfromthehostrocksoftheArharleiandWurenkebulakedeposits, respectively,usinghigh?resolutionlaser?ablation 40Ar/ 39Armethod?TwentyanalysesofandesitesfromtheArharleideposityieldeda 40Ar/ 39Arisochronageof304?7Ma (MSWD=6),and21ofandesiticbasaltsfromtheWurenkebulakedepositdeposityieldeda 40Ar/ 39Arisochronageof280?6Ma (MSWD=2?4)?ThisshowsthatthegolddepositsinthenortheasternKazakhstanTianshanhavebeenformedbetweenendLate CarboniferousandEarlyPermian?Petrologyandgeochemistryprimarilystudiedbytheauthorsshowthatthevolcanicrocksrelatedto theseepithermalgolddepositsinthisregionaremainlyofhigh?Kcalc?alkalineandshoshoniteseries,prisemainlyrhyolite, trachyandesite,basaltictrachyandesite,basalticandesite,trachybasaltandbasalt,withbimodalfeatures?Theepithermalgolddeposits oftheendLateCarboniferousmightbeformedinatransitionalperiodfromcontinent?continentcollisiontoriftenviro