简介：揭示发生到在Bangong-Nujiang缝术地区之中被抓紧的Nyainrongmicrocontinent的侏罗记tectonothermal事件，标明日期的40Ar/39Ar在microcontinent在地下室orthogneiss和侏罗记granitc片麻岩上被执行。在加热阶段，四件样品展出了扁平的高原年龄，与Tp在166176妈的范围集中了的价值；isochron年龄Ti在165175妈的范围被集中，并且他们的相应年龄是在许可的范围以内一致。年龄应该Amdo片麻岩和在侏罗记的magmatic岩石的冷却炮兵阵地的最后的变丑的时代是代表性的。geochronological研究证明了microcontinent的最后的变丑水晶的地下室并且冷却中生代大规模tectonothermal事件发生在晚中间的侏罗记。在中间的侏罗记，Nyainrongmicrocontinent经历了强壮的构造运动。为microcontinent与同位素地球化学与geochronological结合，tectonothermal事件的原因应该被归因于在Nyainrongmicrocontinent和南方卡恩格唐·布洛克追随者之间的碰撞向北方Bangong-Nujiang的subduction海洋的外壳。

简介：

简介：TheBaimazhainickeldeposit,YunnanProvince,China,islocatedinthesouthernpartoftheSanjiang(Tri-river)alkali-richintrusiverockbelt(SanjiangARIR).Inthispaperwasconducted40Ar-39Ardatingoftwophlogopitesinlamprophyreswhichare,asdikes,widelydistributedintheorefield,andtwoplateauageswereac-quired,i.e.,32.46±0.62Maand32.01±0.60Ma,respectively(averaging32.23±0.60Ma).Theagesareobviouslyyoungerthanthoseoftheore-hostedcomplexandmineralizationoftheBaimazhainickeldeposit.Incombinationwiththecharacteristics,itisindicatedthatlamprophyresintheorefieldandthoseintheSanjiangARIRaresimilarintectonicsetting,mineralassemblageandgeochemistry.Itisconsideredthatlamprophyresintheorefieldaretheim-portantcomponentoftheSanjiangARIR,andthelamprophyresandore-hostedcomplexintheorefieldrepresenttheproductsoftwotimesofdifferentmagmaticactivityfromdifferentmantlesources.Ontheotherhand,theageoflamprophyresintheorefieldisolderthanthatofthestrike-slipshearingoftheAilaoshan-Honghefaultbelt,sug-gestingthatthestrike-slipshearingoftheAilaoshan-Honghefaultbeltisnotthefactorleadingtomagmaticactivityoflamprophyresintheorefield,whileitismorepossiblethatmagmaticactivityoftheSanjiangARIRpromotedstrike-slipshearingofthefaultbelt.

简介：

简介：40Ar-39ArdatingofalbitefromtheMeishanandTaocunirondepositsyieldsplateauagesof122.90±0.16Maand124.89±0.30Ma,andisochronagesof122.60±0.16Maand124.90±0.29Ma,respectively.PhlogopitefromtheZhongshan-Gushanorefieldhasaplateauageof126.7±0.17Maandanisochronageof127.21±1.63Ma.Analysisofregionalgeodynamicevolutionofthemiddle-lowerYangtzeRiverregionsuggeststhattheporphyryirondepositswereformedasaresultoflarge-scalelithospheredelaminationandstrongsinistralstrike-slipmovementoftheTanchengLujiangfaultzone.Thecopper,molybdenumandgolddepositsysteminthemiddle-lowerYangtzeRiverregionwasformedduringthestresstransitionperiodoftheeasternChinacontinent.

简介：Byusingthe40Ar-39ArchronologicalmethodtodateK-feldsparfromK-feldspargraniteintheQiaohuotecopperdistrict,theauthorsobtainedaplateauageof274.78±0.44Maandanisochronageof272.7±3.0Ma.BecausethereisnotectonicdeformationoverprintedorhydrothermalalterationintheK-feldspargraniteintrusionafteritsemplacement,the40Ar-39AragerepresentsthecrystallizationageofK-feldsparinK-feldspargranite,i.e.thelatecrystallizationageoftheK-feldspargraniteintrusion,whichindicatesthattheK-feldspargraniteformedintheintraplateextensionalstageduringtheEarlyPermian.Moreover,basedonthespatialrelationshipbetweentheK-feldspargraniteintrusionandcopperorebodies,variationsofcopperoregrade,REEcharacteristicsofK-feldspargraniteandcopperores,andHandOisotopiccompositionsoffluidinclusionsincopperores,themetallogenesisoftheQiaohuotecopperdepositisdirectlyrelatedtointrusiveactivitiesoftheK-feldspargranite,andthusthecrystallizationageofK-feldsparinthegraniteapproximatelyapproachesthemetallogenicepochoftheQiaohuotecopperdeposit.

简介：Ｓｔａｔｉｓｔｉｃａｌ　Ｔｈｒｅｅｆｏｌｄ　ｎａｇｍｅｎｔａｔｉｏｎ　ｉｎ　２５　ＭｅＶ／ｕ　４０Ａｒ　Ｉｎｄｕｃｅｄ　ＲｅａｃｔｉｏｎｓＳｔａｔｉｓｔｉｃａｌＴｈｒｅｅｆｏｌｄｎａｇｍｅｎｔａｔｉｏｎｉｎ２５ＭｅＶ／ｕ４０ＡｒＩｎｄｕｃｅ...

简介：６０年代中叶建立的４０Ａｒ３９Ａｒ计时技术，已被广泛应用于测定各种矿物岩石的年龄，探讨区域性乃至全球性的重要地质问题。高精度４０Ａｒ３９Ａｒ计时技术的建立，使微钾矿物、流体包裹体４０Ａｒ３９Ａｒ定年成为可能。本文综合了笔者十多年来从事流体包裹体...

简介：ＳｔｕｄｙｏｎＤｉｓｓｉｐａｔｉｖｅＣｏｌｌｉｓｉｏｎｓｉｎ２５ＭｅＶ／ｕ４０ＡｒＩｎｄｕｃｅｄＲｅａｃｔｉｏｎｓ￥ＺｈｕＹｏｎｇｔａｉ；ＸｕＨｕｓｈａｎ；ＬｕＪｕｎ；ＺｈａｎｇＹｕｈｕ；ＦａｎＥｎｊｉｅ；ＧｕｏＺｈｏｎｇｙａｎ；?..

简介：ＴａｒｇｅｔＲｅｓｉｄｕｅｓｆｒｏｍＩｎｔｅｒａｃｔｉｏｎｏｆＵｒａｎｉｕｍｗｉｔｈ２０ＭｅＶ／ｕ４０ＡｒＩｏｎｓ￥ＱｉｎＺｈｉ；ＬｉＷｅｎｘｉｎ；ＳｕｎＴｏｎｇｙｕ；ＺｈａｏＬｉｎ；ＺｈａｎｇＸｉａｎｇ；ＹｉｎＸｉｎｍｉｎｇ；?..

简介：Ｅｘｃｉｔａｔｉｏｎ　Ｆｕｎｃｔｉｏｎ　ｏｆ　Ｆｉｓｓｉｏｎ　ａｎｄ　Ｔｒａｎｓｆｅｒ　Ｒｅａｃｔｉｏｎ　ｉｎ　Ｂｏｍｂａｒｄｍｅｎｔ　ｏｆ　４０Ａｒ　ｏｎ　１５９Ｔｂ　ＮｕｃｌｅｉＥｘｃｉｔａｔｉｏｎＦｕｎｃｔｉｏｎｏｆＦｉｓｓｉｏｎａｎ...

简介：ＭａｓｓＹｉｅｌｄＤｉｓｔｒｉｂｕｔｉｏｎｏｆＴａｒｇｅｔＲｅｓｉｄｕｅｓｆｒｏｍＩｎｔｅｒａｃｔｉｏｎｏｆＣｏｐｐｅｒｗｉｔｈ４０ＭｅＶ／ｕ４０ＡｒＩｏｎｓ￥ＹｉｎＸｉｎｍｉｎ；ＬｉＷｅｎｘｉｎ；ＺｈａｎｇＸｉａｎｇ?..

简介：通过国内外花岗岩体的412对角闪石-黑云母40Ar-39Ar年龄（tAr）与锆石U-Pb年龄（tZr）之间差值ΔtZr-Ar（tZr-tAr）进行的频数统计分析表明：ΔtZr-Ar呈对称正态分布（偏度系数CSK==-0.276,峰度系数CKU=16.52）;ΔtZr-Ar既呈正值又有负值,其众数值为0.70Ma,均值为1.15Ma。采用最小二乘法计算,花岗岩体锆石U-Pb年龄与花岗岩角闪石-黑云母40Ar-39Ar年龄拟合出相关系数很高（R=0.996）,回归系数接近l的线性回归方程（tAr=1.00453×tZr-1.932）。这些统计特征表明花岗岩角闪石-黑云母40Ar-39Ar定年测定结果与锆石U-Pb定年测定结果在允许的误差范围内是一致的,不存在花岗岩锆石U-Pb年龄〉角闪石40Ar-39Ar年龄〉黑云母40Ar-39Ar年龄的规律。结合Dodson＇s矿物封闭温度计算公式中存在问题的剖析,本文得出结论,按Dodson＇s公式计算得出的花岗岩矿物40Ar-39Ar封闭温度不能代表从花岗岩浆晶出造岩矿物40Ar-39Ar体系的封闭温度。

简介：Ｌｉｇｈｔ　Ｃｈａｒｇｅｄ　Ｐａｒｔｉｃｌｅｓ　Ｅｍｉｔｔｅｄ　ｆｒｏｍ　Ｃｅｎｔｒａｌ　Ｃｏｌｌｉｓｉｏｎ　ｉｎ　Ｒｅａｃｔｉｏｎ　ｏｆ　２５ＭｅＶ／ｕ　４０Ａｒ　ｏｎ　ｎａｔＡｇＬｉｇｈｔＣｈａｒｇｅｄＰａｒｔｉｃｌｅｓＥｍｉｔｔｅｄｆ...

简介：ＣｅｎｔｒａｌＣｏｌｌｉｓｉｏｎｓｉｎ４０ＡｒＩｎｄｕｃｅｄＦｉｓｓｉｏｎｏｎ２０９ＢｉａｎｄｎａｔＡｇＴａｒｇｅｔｓａｔ２５ＭｅＶ／ｕ￥ＹｉｎＳｈｕｚｈｉ；ＺｈｅｎｇＪｉｗｅｎ；ＪｉｎＧｅｎｍｉｎｇ；ＴａｎＪｉｌｉ?..

简介：ＭａｓｓＹｉｅｌｄＤｉｓｔｒｉｂｕｔｉｏｎｏｆＴａｒｇｅｔＲｅｓｉｄｕｅｓｆｒｏｍＩｎｔｅｒａｃｔｉｏｎｏｆ１９７Ａｎｗｉｔｈ２０ＭｅＶ／ｕ４０ＡｒＩｏｎｓ￥ＳｕｎＴｏｎｇｙｕ；ＬｉＷｅｎｘｉｎ；ＱｉｎＺｈｉ；Ｚｈａ...

简介：Ｈｏｔ　Ｎｕｃｌｅｉ　Ｆｏｒｍａｔｉｏｎ　ａｎｄ　Ｄｅｃａｙ　ｏｆ　４０Ａｒ＋２０９Ｂｉ　ａｎｄ　４０Ａｒ＋１９７Ａｕ　Ｓｙｓｔｅｍ　ａｔ　３０ＭｅＶ／ｕＨｏｔＮｕｃｌｅｉＦｏｒｍａｔｉｏｎａｎｄＤｅｃａｙｏｆ４０Ａｒ＋(２...

简介：Ａｎａｌｙｓｉｓ　ｏｆ　Ｆｉｓｓｉｏｎ　ｉｎ　Ｒｅａｃｔｉｏｎ　４０Ａｒ＋２０９ＢｉＡｎａｌｙｓｉｓｏｆＦｉｓｓｉｏｎｉｎＲｅａｃｔｉｏｎ４０Ａｒ＋２０９Ｂｉ￥ＺｈａｎｇＣｈｕｎ；ＺｈｅｎｇＪｉｗｅｎ；ＷｕＥｎｊｉｕ；ＹｉｎＳｈｕ...

简介：　　0引言　　世界上第一个Ar-Ar法实验室于1965年在美国加州伯克利年代学实验室建成[1].我国最早的Ar-Ar法实验室于1982年分别在北京中国科学院地质研究所和贵阳中国科学院地球化学研究所建成.到目前为止,国际上用于K-Ar和Ar-Ar法定年的标准物质约30个左右,绝大部分年龄为第三纪至寒武纪.大于6亿a的K-Ar法年龄标准物质只有英国标准Hb3gr角闪石(年龄1072Ma)和中国标准BSP-1角闪石(年龄2060Ma),这两个老年龄标准也是国际标准物质.　　……

简介：ＥｖａｐｏｒａｔｉｏｎｏｆＩｎｔｅｒｍｅｄｉａｔｅ－ｍａｓｓＦｒａｇｍｅｎｔｓｆｒｏｍＨｏｔ－ｎｕｃｌｅｉＰｒｏｄｕｃｅｄｂｙ２５ＭｅＶ／ｕ４０ＡｒＢｏｍｂａｒｄｉｎｇ１５９ＴｂＴａｒｇｅｔ￥ＪｉａｎｇＤｏｎｇｘｉｎｇ；...