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时间:2020-03-26
《赣南荡坪石英脉型黑钨矿床成矿流体研究.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、矿物岩石地球化学通报·研究成果·BulletinofMineralogy,PetrologyandGeochemistryVo1.35No.3,May,2016赣南荡坪石英脉型黑钨矿床成矿流体研究王璇,王旭东,,袁顺达2,江雨彤,何薇1.东北大学秦皇岛分校资源与材料学院,河北秦皇岛066004;2.中国地质科学院矿产资源研究所,国土资源部成矿作用和资源评价重点实验室,北京100037摘要:为揭示赣南荡坪钨矿的成矿流体特征及矿床成因,采用流体包裹体组合的研究方法,利用红外显微镜、冷热台和激光拉曼等测试手段,对黑钨矿和与其共生的石英中流体包裹体进行了系统的岩相学观察、
2、显微测温及成分分析。结果表明,与黑钨矿形成相关的流体为中高温、中低盐度的NaC1一HO流体体系,与石英中流体包裹体相比,黑钨矿中包裹体的总体均一温度及盐度较高,分布范围狭窄,表明黑钨矿与共生石英中的流体包裹体形成的P—t—条件不同。成矿流体在演化过程中的冷却作用是本矿床黑钨矿沉淀成矿的主要因素。关键词:红外显微测温;流体包裹体;黑钨矿;荡坪钨矿;赣南中图分类号:P619.233文章编号:1007—2802(2016)03—0534-06doi:tO.3969/j.issn.1007—2802.2016.03.017StudyontheOre-FormingFlui
3、doftheDangpingQuartz-TypeTungstenDepositinSouthernJiangxi,ChinaWANGXuan。WANGXu.dong',YUANShun.da,JIANGYu.tong。HEWei,,1.SchoolofNaturalResources&MaterialsSciences,NortheasternUniversityatQinhuangdao,Qinhuangdao,Hebei066004,China;2.MLRKeyLaboratoryofMetallogenyandMineralAssessment,Insti
4、tuteofMineralResources,ChineseAcademyofGeologicalSciences,Beqing100037,ChinaAbstract:Inordertorevealcharacteristicsoftheore—formingfluidandgenesisoftheDangpingquartz—typetungstende—positinsouthernJiangxi,thisstudyhasadoptedtheconceptofFluidInclusionAssemblage(FIA)andperformedsystemat-
5、icallydetailedpetrographicobservation,mierothermometryandcomponentanalysisoffluidinclusionsinwolframiteandin—tergrownquartzinquartzveinsbyusinginfraredmicroscope,cooling—heatingstageandlaserRamanspectroscopy.WefoundthatthefluidinassociationwiththetungstenmineralizationisaNaC1-H2Ofluid
6、withmediumtohighhomogenizationtemperaturesandmediumtolowsalinities.Comparedtothefluidinclusionsinquartz,thoseinwolframitehaverelativelyhighhomogenizationtemperaturesandsalinitiesvaryinginverynarrowrange.ItshowsthattheP·T—Xconditionsfortheformationofwolframitearedifferenttothatoftheint
7、ergrownquartz.Inaddition,itisproposedthatthatthecoolingofflu—idsismainlycausedtheprecipitationoftungstenintheevolutionprocessoftheore—formingfluid.Keywords:infraredmicroscopy;fluidinclusion;wolframite;Dangpingtungstendeposit;southernJiangxi流体包裹体是矿床学研究中获取成矿流体特与其共生的脉石矿物中流体包裹体间接获得,其前征、揭示
8、成矿条件最
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