简介：ThemetasedimentaryLujiapuziFormationcropsoutalongthenortheasternmarginoftheNorthChinaCraton,closetotheYan-LiaoRift.Theageandtectonicsettingoftheformation,anditsrelationshipwiththeYan-LiaoRiftarecurrentlyunclear.HerewepresentdetritalzirconU-Pbages,andHfisotopicandgeochemicaldatafortheLujiapuziFormationtoconstrainthetimingofdeposition,theprovenanceoftheformation,andtheregionalstratigraphyrelationship.ZirconU-PbdatingconstrainsthetimingofdepositionoftheLujiapuziFormationtoyoungerthan1780Ma,andindicatesthatmostgrainsweresourcedfromtheLonggangBlockandthePaleoproterozoicLiao-JiBelt.DetailedfieldinvestigationsandacorrelationoftheregionalstratigraphyrevealthatmuchoftheLujiapuziFormationisequivalenttotheTuanshanziFormationintheYan-LiaoRift;thelowersectionmayrepresenttheearliestsedimentsdepositedwithintheFanheBasin.Basedontheseresultsandthefindingsofpreviousstudies,wesuggestthatthebaseoftheChangchengSystemhasanageof1.80Ga.ZirconHfisotopicdataindicatethatthemainperiodofcrustalgrowthalongthenortheasternmarginoftheNorthChinaCratonoccurredat3.2-2.5Ga,withapeakat2.9-2.7Ga.

简介：TheTruongSonFoldBelt,locatedatthenortheasternmarginoftheIndochinaBlock,isconsideredtobetectonicallylinkedtothesubductionofthePaleotethysOceanandsubsequentcollision.SeponisoneofthemostimportantsuperlargedepositsoftheTruongSonFoldBelt.OurLA-ICP-MSzirconU-PbdatingresultsshowthatgranodioriteporphyrysamplesfromtheSepondeposithaveagesof302.1-4-2.9Ma,whichisacrucialphaseformagmatic-tectonicalactivitiesfromtheLateCarboniferoustoEarlyPermianandhasavitalinfluenceonthemineralizationofcopperandgold.ZirconfromgranodioriteporphyryyieldsεHf(t)valuesof4.32to9.64,andTDM2hasanaverageageof914Ma,suggestingthatthesourceofthegranodioriteporphyryintheregionweremainlymantlecomponentsbutunderwentmixingandcontaminationofcrustmaterials.TheCe^4+/Ce^3+valueofzirconinthegranodioriteporphyryvarysgreatlyfrom2.4to1438.29,whichshowsmagmamixingmightoccur.Consideringthecharacteristicsoftraceelementsinthezirconandthewholerockgeochemicalcharacteristicsofintrusionrocksaswellasthecharacteristicsofregionalvolcanic-sedimentaryassociation,itisindicatedthatthetectonicsettingmaybethecontinentalarcenvironment.TheSeponAu-Cudepositisderivedfromemplacementofcalc-alkalineintermediate-acidmagmawithcomingfromdeepsourcesinthesubductionprocessofthePaleotethysOcean,formingporphyryMo-Cu,skamCu-Aumineralizationandahydrothermalsedimentary-hostedAumineralizationinthewallrocks.

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简介：Shadong沉积物是在东方Tianshanorogenic带，和存款的地质的特征发现的第一大规模钨存款显示深深地隐藏的花岗石身体与矿化作用是遗传上相关的。从Shadong的锆石的LA-ICPMSU-Pb年龄隐藏了在这获得的花岗石研究是239湡瑩楯獤吗？？

简介：在Huangling背斜位于YangtzeCraton以内的olivine-gabbroic岩石被标明日期在大约由LA-ICP-MS的857-854妈方法。岩石属于亚alkaline系列并且由辉石(35%-40%)组成，斜长石(40%-45%)，橄榄石(8%-10%)和尖晶石(3%-5%)。橄榄石有作为贵橄榄石被分类的73-83的Fo价值。辉石有FeO(6.60wt.%-8.23wt.%)的相对低内容，但是然而，高CaO(20.23wt.%-21.25wt.%)满足斜长石有高级艾尔2O3(31.78wt.%-32.37wt.%)，CaO(16.08wt.%-16.25wt.%)并且一(79-80)价值，但是低Na2O内容(1.95wt.%-2.11wt.%)。尖晶石是有MgO(13.65wt.%-13.68wt.%)的高内容的特征的magnesioferrite，FeO(23.27wt.%-23.40wt.%)和艾尔2O3(62.43wt.%-62.74wt.%)。这些矿物质的化学作文类似于在造山运动以后的环境被形成的斑粝岩岩石的那些。橄榄石斑粝岩样品有否定锆石Hf价值(-16.57吗？？

简介：为探讨赣东北景德镇地区双桥山群的沉积时代与物质来源,对该区双桥山群安乐林组地层中发育的一套变火山碎屑凝灰岩夹层进行了年代学、地球化学及锆石Lu-Hf同位素研究。结果显示,该套火山碎屑凝灰岩的岩性主要为英安岩、安山岩,凝灰岩的LA-ICP-MS锆石U-Pb年龄为（809±2）Ma,表明该套岩石形成于新元古代。凝灰岩锆石的Hf同位素组成变化范围较广,其中二阶模式年龄为1426~2313Ma,主要集中于1.7~2.3Ga之间,其ε_（Hf）（t）均为负值-2.6~-16.5,t_（DM2）模式年龄远大于U-Pb年龄,表明该组岩石的岩浆来源于元古代地壳物质的再循环。

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简介：安徽北淮阳构造带鲜花岭找矿远景区发育中酸性侵入岩相关的铜铅锌矿化,本次研究选取铜铅锌矿化相关的鲍冲二长岩开展锆石LA-ICP-MSU-Pb年代学及LA-MC-ICP-MS锆石Lu-Hf同位素分析。结果显示锆石Th/U比值为0.54-1.33,属于典型岩浆成因锆石。鲍冲二长岩锆石U-Pb年龄加权平均值为(124±2)Ma(n=10,MSWD=3.2);结合锆石自形、发育岩浆环带等特点,该年龄是鲍冲二长岩的结晶年龄。这一形成年龄对应于大别造山带构造垮塌事件,因此,北淮阳构造带鲜花岭地区铜铅锌矿化可能形成于早白垩世后岩石圈减薄环境。原位锆石Lu-Hf同位素研究显示,鲍冲二长岩的εHf(t)在-15.7~-10.2之间,两阶段锆石Hf模式年龄为1.82~2.17Ga,指示岩浆源区为古元古代的基底。结合前人资料,安徽北淮阳构造带成矿作用可以划分为三期:第一期晓天盆地的火山热液型金矿化(130Ma),第二期鲍冲岩体有关的铜铅锌矿化(124Ma)和第三期的斑岩型钼矿化(114Ma)。