简介：Rheologicalpropertiesofpolyphaserocksplayanimportantroleinthedynamicsofthelithosphereandasthenosphere.However,suchfundamentalissueshavenotbeenwellresolved.Atheoreticalanalysishasbeenmadetodevelopexpressionsfortheflowlawsofpolyphaserocksintermsofthevolumefractionsandflowlawsoftheirconstituentphases.Theflowstrengthspredictedbytheproposedmodelforcommoncrustalanduppermantlerockssuchasgranite,diorite,diabaseandlherzolite,andforsynthetictwo-phasecompositessuchasforsterite-enstatiteandwaterice-ammoniadehydrateaggregatesareingoodagreementwithpreviouslydeterminedexperimentalvalues.Theproposedtheoreticalmodelallowsonetocalculate,tothefirstapproximation,theflowlawsofalargenumberofpolyphaserocksatgeologicconditionsbasedontheexperimentallydeterminedflowlawsofarelativelysmallnumberofmonomineralicaggregates.

简介：Recently,wecarriedouttheNationalNatureScienceFoundationofChina(No.41273033)andSpecialFundforBasicScientificResearchofCentralColleges(No.310827153407)andmadesomeadvancesasfollows.ThemainresearchachievementsofthePaleozoicvolcanicrocksinnorthwestChinaincludetwoaspects:

简介：Neoarchean变形mafic岩石在更低并且中间的WutaiComplexmainly包括变形斑粝岩，角闪岩和绿泥片岩。他们能根据球粒状陨石被细分进三个组规范的REE模式。在组#1的岩石被将近扁平的REE模式(La_n/Yb_n=0.86-1.3)描绘，最低全部的REE(29-52ppm)，并且弱对积极Eu异例否定(Eu_n/Eu_n~*=0.84-1.02)，将近完全原始的披风使模式和强壮的否定Zr(Hf)正常化异例。他们在REE和痕量元素的geochemical特征类似于海洋高原拉斑玄武岩的那些，它暗示这组岩石能表示太古代的海洋的外壳的残余源于一根披风羽毛。在组#2的岩石被中等全部的REE(34-116ppm)描绘，充实LREE(La_n/b_n=1.76-4.34)球粒状陨石与弱Eu异例使REEpatterns正常化(Eu_n/Eu_n~*=0.76-1.16)，并且否定Nb，Ta，Zr(Hf)，在使正常化的原始披风的Ti异例搜寻图。REE和痕量元素特征显示他们表示从一个亚弧披风发源的弧岩浆挤metasomatized导出byslab的液体。在组#3的岩石被最高全部的REE(61-192ppm)描绘，有稍微否定的Eu异例的最强壮的LREE丰富(La_n/Yb_n=7.12-16)(Eu_n/Eu_n~*=0.81-0.95)在球粒状陨石规范的图。在原语，披风使图正常化，这些岩石被大负异常在Nb描绘，Ta，Ti，对没有Zranomalies否定。他们代表从充实的亚弧披风楔发源的弧岩浆导出inslab融化。三组岩石暗示NeoarcheanWutaiComplex的形成与披风羽毛和岛弧相互作用有关。

简介：AnintegratedstudyofzirconU-Pbgeochronologyandpetrochemistry,togetherwithzirconLu-Hfisotopes,hasbeencarriedoutonthebasaltic-andesitictuffandvolcanicbrecciafromtheNamHangFormationandandesitictufffromtheMuang-NanFormationintheXaignabouliarea,whichhadbeenmappedasthePermian–EarlyTriassiconthe1:1000000geologicalmaporLateCarboniferousonthe1:200000geologicalmaps.ZirconU-Pbdatingofthreesamplesyieldedweightedmeanagesof235±2.6,232±1.4and278±2.8Ma,respectively,suggestingaLateTriassicoriginfortheNamHangFormationandanEarlyPermianoriginfortheMuang-NanFormation.Geochemically,theyarecharacterizedbydepletionsinHFSEs(e.g.,Nb,Ta,Ti)andhighLILE/HFSEratios,andtheyhavepositivezirconεHf(t)valuesof8.7–15.9,whichexhibitsthecontinentalarcvolcanicaffinityandpartialmeltingofsubductingoceanicslabinthemagmasource.Combinedwithspatialoccurrenceofthevolcanicrockandexistinggeochronologicalandgeochemicaldata,wesuggestthattheXaignabouli-LuangPrabangvolcanicbeltcanbelinkedtotheLoei-Phetchabunbelt.ThePermian–TriassicvolcanicrocksinthisbeltmightbeaproductoftheNanback-arcbasineastwardsubduction.

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简介：BasedonthediscussionontheintracontinentalorogenicigneousrocksformedafterIndia-Asiacollision(40or45Ma),theintracontinemalorogenicprocessesofQinghai-Xizang(Tibet)-Himalayaaretraced.Muscovite/twomicagraniteisconsideredasapetrologicalrecordofintracontinentalsubduction.Volcanicrocksofshoshoniteseriesarebelievedtobetheproductsoftheorogenicandoutsidecratoniclithosphereconvergence.Theintracontinentalorogenicigneousrocksaredevelopedonlyonthemarginsoftheorogenicbelt.Thepairingphenomenonoftheigneousrockzonesisregardedasoneofthebestsignstorecognizethespecialrangeoforogenicbelt.Thestageofmagmaticactivityisarepresentationandindicatoroforogenicepisode.ThreepairsoftheigneouseventsinOligocene,MioceneandPleistoceneandtheirspacedistributionindicatethreecorrespondingorogenicepisodesandthehorizontalexpansionacrosstheorogenicbelt,respectively,Onthenorthernandsouthernmarginsof

简介：Wudalianchi(五大连池)火山是有在东北中国的相当好的暴烈的风景的著名的第四级的。暴烈的岩石是有47.3wt.%的SiO2内容的电唱机碱玄岩，tephri响岩，trachyandesite，和玄武岩的trachyandesite54.2wt.%。高K2在Wudalianchi暴烈的岩石中的O内容建议他们可能分享普通钾的岩浆来源。，Wudalianchi暴烈的岩石的岩浆进化是类似的Laoheishan的新爆发产品(老黑山)和Huoshaoshan(火烧山)火山是稍微，更多比旧爆发材料演变，即，新爆发在的岩浆17191721从上述二座火山是在地下的房间的发展岩浆。Wudalianchi暴烈的岩石的主要斑晶是橄榄石，clinopyroxenes，和一些典型K富有的白榴石。各种各样形状融化包括从Laoheishan和Huoshaoshan火山的新爆发产品在橄榄石斑晶被发现。由电子，分析的微探查(EMP)，SiO2的内容和全部的碱显示出一个宽范围，建议pre暴发的岩浆可能是更复杂的，或melt包括是unhomogeneous。根据EMP结果，排除的硫从这评价，这被相信新爆发比Tianchi的千年爆发的高得多(天池)火山，当时排除的氯率是比Tianchi的低的大小火山。

简介：IfoundhighQvalues(Q-ratio=Jn/Ji,Jn,Jiareremanentmagnetizationandinducedmagnetization)intheSuluultrahighpressure(UHP)metamorphicrocks,easternChinawhichistheworld’slargestUHP

简介：ObjectiveThedistributionofrearrangedhopanesinhydrocarbonsourcerocksisinfluencedbythermalmaturityandoriginalsourceinput,andisalsocontrolledbydepositionalconditions.Throughcomparisonoflacustrineandcoal-bearingsourcerocks,thisworkattemptedtoanalyzethecompositionandoriginofrearrangedhopanesinhydrocarbonsourcerocks.Takenthesourcerocksfrom

简介：作为一个参数，那把岩石的热传播性质描述，热电导率为学习沉积的盆的热政体是不可缺少的，并且检索热电导率的高质量的数据是地热的相关研究的基础。光扫描方法这里被使用从Tarim盆，有在中国的丰富的烃潜力的最大的intermontane盆，和修正为可变的孔的碎屑状的岩石样品被做的水浸透测量745件练习核心样品的热传导性。所有测量的值，在这个区域与以前出版的数据结合了，是综合的讨论控制在盆影响岩石的热传导性的因素的分发特征和专业。我们的结果证明岩石的热电导率的价值通常从1.500～3.000W/m?8

简介：共存的作文，比例，和平衡温度在水晶的岩石中二长石对在petrogenesis的岩相学和解释的分类很重要。水晶的岩石通常由4-6矿物质(阶段)组成，取决于他们的独立化学部件和结晶化的平衡温度。一般来说，矿物质阶段的数字能被阶段规则决定。根据集体平衡原则，共存的体积作文二长石如果包含钙，钠，和钾氧化物的共存的mafic矿物质阶段的作文是坚定的，能从岩石的体积化学被评估，例如，由microprobe分析。作文，比例，和温度在平衡罐头二长石同时因此从岩石的体积作文数字地被解决，由合并这篇活动/作文，有团的第三的长石的关系平衡限制。在在这份报纸介绍的数字近似方法之上，长石组上的更好质量的、内部一致的数据能通常被获得，它将被期望在在岩石和创作矿物质的水晶的岩石，以及体积化学的系统的热力学的equilibria的考虑更现实主义、精确。

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简介：基于关于的详细研究岩石学并且免职的geochemical特征和Oxfordian碳酸盐的成岩作用在原子量Darya摇盆，土库曼斯坦，碳和氧同位素被分析。paleoenvironmental进化与保存得很好的原来的碳同位素由样品反映了的结果表演与碳同位素stratigraphic曲线与一致并且与全球海平面的曲线，Mid-Oxfordian宽违反，和积极碳同位素旅行事件几乎一致。继续违反的Mid-Oxfordian不仅在原子量Darya盆为Oxfordian礁石和浅水库的发展打了基础而且为Oxfordian全球违反和礁石和银行和高速度的器官的碳埋葬事件的产生发展提供了一个例子。在diagenetic环境的氧同位素的反应证明micrite石灰石和小粒的石灰石经历了弱diagenetic改变，并且样品大部分保留了原来的海水特征。化成白云石和在烃累积前充满溶液vugs和破裂的热水的方解石的降水在主要控制因素是温度的关上的diagenetic环境发生了，并且diagenetic液体从深热的盐水。在烃累积以后的石灰石的chalkification发生在油矿水系统。

简介：FivenearlyE-W-trendingalkali-richigneousrockbeltsaredistributedfromnorthtosouthinnorthernXinjiang,andtheyarecomposedmainlyofriebeckite,K-feldspargraniteandhigh-Kandmedium-Kcalc-alkalinevolcanicrocksandshoshonite.TheyweremainlyemplacedoreruptedbetweentheCarboniferousandPermian.ThecompositionsofSr,Nd,Pb,andOisotopesimplythattheirprincipalresourcematerialsarederivedfromtheuppermantleorjuvenilecrust,indicatingobviouscontinentalgrowthinthePhanerozoic.Thetraceelementassociationimpliesthattheirtectonicsettingsarewithinplateandvolcanicarcforalkali-richgranites,andpost-collisionalarc,lateoceanicarcandcontinentalarcforalkali-richvolcanicrocks.AnarchipelagomodelwassuggestedforthetectonicevolutioninnorthernXinjiang.Itcanbenamedthecentral-Asia-typeorogeny,whichisdifferentfromthesocalledcircum-Pacificocean-continent-typetectonicsortheAlpine-Himalayancontinent-continent-collisional

简介：1.ObjectiveAgraphitedeposithasbeendiscoveredinSujiquan,Xinjiangin1980s,whichprovidesdetailedgeologicalsettingsforthesuper-largegraphitedepositdiscoveredinHuangyangshanplutonwithtotalreservesupto7.264×10^9tin2017.OutcropsofigneousrocksinthestudyareaincludeMiddleDevonianplagioclasegraniteandLateCarboniferousalkalifeldspargranitethatisreferredtotheHuangyangshanpluton,whichincludestheLowerCarboniferousHeishantouFormationandJiangbasiFormation,bothofwhichconsistofvolcanic-sedimentaryrocks(Fig.1).Sujiquanfaultprovidedpassageforthemigrationofvolcanicintrusions.Graphitedepositsareusuallyhostedbymetamorphicrocks,butHuangyanshandepositsarehostedbygraniterocks,whicharerarelyknown.TheHuangyangshangraphitedeposithostedbygraniteplutonatHuangyangshanareawasdiscoveredbyXinjiangBranchofChinaNationalGeologicalExplorationCenterofBuildingMaterialsIndustrysince2015.

简介：Porestructurecharacteristicsofrockareagreatconcernforresearchersandpractitionersinrockmechanicsandrockengineeringfields.Inthisstudy,mercuryintrusionporosimetry（MIP）wasusedtomeasureporesizedistribution,aswellasseveralimportantindexparametersofporestructure,forsevencommontypesofdeepsedimentaryrockswithatotaloffiftyrocksamples.Resultsshowasimilarporesizedistributionpatternoftherocksamplesinthesamelithologicalgroup,butremarkabledifferencesamongdifferentlithologicalgroups.Amongseveninvestigatedrocktypes,mudstonehasthesmallestporosityof3.37%,whileconglomeratehasthelargestvalueof18.8%.Itisalsofoundthattheporosityofrocktypeswithfinergrainsizeislowerthanthosewithcoarsergrainsize.Meanwhile,acomparisonoffrequencydistributionattenintervalsofpore-throatdiameteramongseventypesofsedimentaryrocksrevealsthatdifferentrocktypeshavedifferentdominantpore-sizeranges.Furthermore,permeabilityoftheinvestigatedsedimentaryrocksampleswasderivedbasedonMIPdatausingreportedtheoreticalequations.Amongsevenrocktypes,mudstonehasthelowestaveragedpermeability(3.64×10-6mD)whileconglomeratehasthehighestone(8.59×10-4mD).Frommudstonetoconglomerate,rockpermeabilityincreaseswithanincreaseofgrainsize,withonlyanexceptionofsiltstonewhichhasarelativelylargerporosityvalue.Finally,regressionanalysisshowthatthereisagoodfitting（R2=0.95）betweenpermeabilityandporositywhichcouldbeeasilyusedtoderivereliablepermeabilityvaluesofsimilarkindsofengineeringrocks.