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时间:2020-03-25
《广东凡口铅锌矿床赋矿地层稳定同位素研究.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、2(】142J]矿床地质第33卷第1划February,2()14MINERALDEPOSITS33(1):190~200文章编号:(/2587106(2014)01—0190—1l广东凡口铅锌矿床赋矿地层稳定同位素研究韩英,王京彬,祝新友2一,甄世民(1何色金属矿产地质调查,北京100012;2中色地科矿产勘查股份有限公司,北京100012;3中围地质调查局发展研究中心,北京100037)摘要J尔凡口铅锌矿_【术是,1J国著名的大型铅锌矿床。在凡口矿区新发现有类似奥陶系岩性的地层,与寒系起构成矿的浅变质基底,其6Cv_lⅧ{值
2、为一6.5%6(sM()w值为14.9‰,在矿区各地层中最小,受热液作JlJ影响最弱,上要受岩性影响。南深浅,泥盆系地层的艿(眦、81sOVSMOW值逐渐增高、Sr/Sr值逐渐减小,该段的l腻矿化(1hd和I)cv_PI)H接近零,8OvsM()W在18%。左右,稳定同位素的变化除受岩性影响外,主要受后划热液蚀变作_【}j的影u为成矿提供了‘定的前提条件。石炭系(C1ht)白云岩的813C平均值为2.17%。,8180、I均值为21.9‰,与其他层位性质明不,为矿区的盖层。关键词地球化学;沉积旋【口J;稳定同位素;热液蚀变;凡口
3、铅锌矿中图分类号:P618.42;P618.43文献标志码:AStableisotopestudyofore-bearingstrataofFankoulead-zincdeposit,GuangdongProvinceHANYing,WANGJingBin,ZHUXinYou2andZHENShiMin3(1ChinaNonferrousMetalsResource(k~ologicalSurvey,Beijing100012,China;2ChinaNon—ferrousMetalsResource(k<)k)gicalSu
4、rvey,BeijingInstituteofGeologyandMineralRemurces,Beijing100012,China;3DevelopmentResearch(_?enterofChinaGeologicalSurvey,Beijing100037,China)AbstractFheFankoulead—zincdepositisafamouslead—zincdepositinGuangdongProvince.TheOrdovician(?)stratafoundintheFankounew()redis
5、trictandtheCambrianstrataconsistoftheepimetamorphicbas.ementofthe()rcdistrict.Thecarbonandoxygenarebothlowest(乃Cv—PDB=一6.5%(】,818o()w=l4.9%。)inthestrataoftheoredistrict,mainlyinfluencedbythestratabut1eastinfluencedbythehydrothermalprocess.Fhevaluesof313CvI,I318ovsM()
6、wand87Sr/86SroftheDevonianstrataincreaseanddecreasewiththedepthrespec-,lively.The313(、-Vlfand318sM()wvaluesofthemainore—bearingstrata(Devonian)are0and18%,respec—tively.Thevariationofstableimtopesismainlyinfluencedbylithologyandthelatehydrothermalalteration,bothofwhic
7、hcontributedtomineralization.Theaveragevaluesof60Cand0forCarboniferousdolomiteare2.17‰and21.90respectively,significantlydifferentfromthedataofotherstrata.ItiSthusheldthattheCarboniferousdolomiteisthecappingbedoftheoredistrict.Keywords:geochemistry,sedimentarycycle,st
8、ableimtope,hydrothermalalteration,Fankoulead—zincdeposit水文得到伞危机矿⋯找矿专J;!j!科研课题“湘南粤北地区锡钨多金属矿床成矿规律总结研究”(20089927)的资助第‘作者简介韩英,女,1983年生,
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