简介：Thispaperproposesanewtectonicpatternofthedeep-seatedstructuresinChinaanditsadjacentareas(includingtheT-A-BsystemoftheRyukyuIslands).Thisisbasedonstudiesofthegravityfieldandgravityinversioncoupledwiththesummationofthemostrecentachievementsingeophysicalstudies.Fromaplate-tectonicpointofview,themetallogeniccharacteristicsandtheirindicationsatdepth,aswellasrelevantgeophysical-geologicalcharacteristicsoffourtectonicenvironmentsoftheChinesecontinentareanalysed,andaclassificationofcompositemetallogenicprovincesandbeltsandpredictionofmetallogenicprospectsaremade.TheauthorextendstheKunlun-Qilian-QinlingtectonicbelttotheT-A-BsystemoftheRyukyuIslandsthroughtheNWdeepboundaryoftheHangzhouBay,andalsoproposesthefollowingbasicviews’themigrationandsuperpositionoftectonicenvironmentsledtotheformationofacompositemetallogenicsystem;thechangeinthetectonicenvironmentresulted

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简介：Thisstudyshowscrossholeseismictechnologycanoffernotonlyimagesofcrossholetomography,butalsoreflectsectionsofhighresolution.Properprocessingofcrossholeseismicreflectdataproducesahighqualitysectionbetweentwowells.Thinbeds,faultsandothergeologicphenomenacanbefoundclearlyinthissection.Sodetailedreservoirdescriptioncouldbeformedtoguidetheoilfielddevelopmentplan.Meanwhile,crossholetechnologycanbedirectlyusedtomonitortheprocessofoilfieldinjectionandenhancedoilrecovery,soithasawidescopeofusageinoilfielddevelopment.

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简介：<正>CENTRALCHINAARCSERIESANDITSMETALLOGENYJiangZhenya(HubeiInstituteofGeoscience,Wuhan,430022,Hubei,P.R.China)arc,metailogeny,CentralChinaThecentralChinaarcseriesliesacrossthewholecentralChina,embodyingQinghuaiarc,Esuarc,Changjiangarc,Chuzhearc,andXianggangarc.Itisagigantictecton-icarcseries.TheseriesistheresultofnorthandsouththrustingofhorizontaldiferrentialbucklingundertheuniversalnorthandsouthcompressingineasternChina.ItbeganatYingzhimovement,formedatthefirststageofYanshanmovement,andsolidifiedatthesceondstageofYanshanmovement.Theseriescontrollssedimentation,exogenicdeposits,magmatism,andendogenicdeposits.Menawhileitaffectsmordentopography,alluvialsystem,andclimate.

简介：Forskarntypedeposits,therearetwokindsofskarns,skarnformedbyfiltrating-diffusingmetasomatismandveinskarnformedbyfilling.Theveinskarn,discussedthispaperandconsideredtobemagmaticgenesis,ischaracterizedby:(1)occurringasveinwithdistinctboundarieswithcountryrocks,yetjustthesameeveninmarbleeasytobereplaced;(2)composedofamineralassemblagesimi-lartothatofgranite,containingpegmatiteaswellascoarseskarnmineralpockets,andsometimestran-sitedwithdikerocks;(3)clearcrystallinefeatureofdeposition;(4)sideronintietexture;(5)showingvesicular,bean-likeandflowstructures;(6)verycommonliquidimmiscibility;(7)verticalzoningofgravitationaldifferentiationcausedbyvolatileconcentrationupwards;(8)associatedandtransitedwithiron-copperorebodiesofmagmaticgenesisandtungsten-bearingquartzveinsofsilicatemagmaticgene-sisrichinvolatile;(9)meltinclusions.Twooriginsofskammagma,originatedbyassimilationofsilicatemagmaatitsemplacem

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简介：TheNanlingMountains,atlatitude23.5"-25.5"N,isafamousnonfcrrousmctalzoneinChina’ItissituatedatthejuncturcofGuangdong,GuangalandHunan,runningcasttowestingencral.TlicrcarefourclcmentsformingthcNanlingMountains’Extcndingfromeasttowcst,oneisgranitcformedfromtlieIndosiniantothcYansbanianorogcny,andespecia

简介：Twohypothescsonoredepositshavcbeendevelopedinalmostthesamietimesince1970’s,inthetideoftheearthseiencerevolutionontheleadshipofcontinentdrift,occansprcadingandplatetceton-ics.Oneisstrataformandstrataboundorcdeposits,theanotherispolygcncticcompoundorcdcposits.K.H.Wolfisapionecrfortheformcr,andChcnGuod

简介：X-raydiffraction(XRD)peaksinalow-anglediffractionsectionofclayminerals,especiallythoseofauthigenicorigin,havebroadeningandtailingfeaturesinshape.Usingthefivebasicparameters,peakposition,peakheight,width,shapecoefficientandasymmetry,todescribeanXRDpeakismoreaccurate,comprehensiveandintegratedthanusingonly3ofthem,position,heightandwidth.FollowingtheconceptofthefivebasicparametersofanXRDpeak,theprogramDecoformproposedinthisstudyprovidesmoreinformationinmineralogicalanalysesbyfittingactualXRDprofiles.IncombinationwiththeHW-IRplot,Decoformcanbesystematicallyandaccuratelyusedinthecomprehensiveanalysesofcrystallinity,domainsize,latticestrainandquantitativephase.Itisalsoofvalueforthegeologicalinvestigationsofdiagenesis,metamorphism,basinmaturity,structuralstressfieldandsoon.

简介：ApreliminaryorganicgeochemicalstudyshowsthatthesulphideoresfromthehydrothermaldepositoftheOkinawaTrougharegenerallylowinthetotalorganiccarbonandextremelylowinthesolubleorganicmatter.Inthealiphatichydrocarbonfraction,then-alkanesrangefromC15toC35,withusualmaximainthemiddlen-C20regionandstrongodd-carbonnumberpredominancewhenn>C25(CPI=1.2).Thedominantanaloginthearomaticfractionisphenanthrene,apolynucleararomatichydrocarbon,whichprovidesevidenceforhydrothermalactivity.Theorganicmatterderivedmainlyfrommarineplanktonicandterrigenousvascularplantsisentrappedinahigh-temperatureregimesuchasanactivechimneyandcooledquicklyinthesulphideoresontheseafloor.Organicmatterandsulphidesaredefinitelyproductsofahigh-temperaturealteration.ThebiomarkercompoundsindicatethattheoresareformedunderlowEhandpHconditions梐reducingtoanoxicenvironment,whichisfavourableforsulphatestobereducedintosulphidesbybiogenic(bacterial)orabiogenicactivity.

简介：索尔顿湖是在东南的加利福尼亚位于地形的关上的Salton马槽的最深的点的一个终端湖。它当前是在处于状态的区域的最大的湖。它被一个泛滥的事件在19051907沿着克罗拉多河创造，类似于在过去的世纪的历史的洪水在一样的地点创造了古老的卡休拉湖的短暂化身的方法。它在今天的中心的位置帝国山谷，一个热、干旱的地点家到一些在美国的最高效的灌溉农业陆地，通过在农业流量，它输入的主要形式，和广阔蒸发损失之间的精细的平衡保证了它的进行中的幸存。不过，它是的平行角色一个娱乐资源和重要野生动物产地，在它存在的第一个世纪建立了，被增加咸度减少威胁水质量，和从喂山谷农业的克罗拉多河的减少的水分配。将被影响由的逐渐地不明确的未来减少了的索尔顿湖脸从克罗拉多河，对到在山谷的支持耕作和能量工业的另外的水来源的要求，和稳定湖咸度的需要浇进口，维持娱乐资源，并且保存什么成为了重要生态系统和野生动物产地。

简介：Inshallowcrust,faultsoftenconsistofaseriesofsecondaryfractures.Basedonexperimentalmicro-featuresinrockmechanicsandmacro-structuresinfield,theprogressivecoalescencemodel,inwhichabrittlefaultevolvedfrommicro-crack,styloliticfracture,largefaulttosuper-largefault,isfounded,anditsformingmechanismisdiscussedbyvariationofstressfield.Atlasttheundulation,branchesoffaultsandthephenomenonthattheanglebetweenfracturesandtheprincipalstressaxisdecreasesgraduallyareexplainedbytheG.C.Sihmodel.

简介：SequenceboundaryisstudiedindetailinreferencetothePermianGuadalupianLopingianboundary,basedonhighresolutioncorrelationofconodootzones.Aconceptualsynchronousstratigraphicboundary,correspondingtotheageofthesequenceboundarydatedintheconformableportionofthesequenceboundary,isdefinedasthesequencechronostratigraphicboundary(SCB).Thesequenceboundaryisprovedtobedualinnatureinregardstothesynchronyanddiachroneityofstratigraphicboundaries.Themeritsofthesequenceboundaryinstratigraphicsubdivision,correlationandclassificationareelucidatedincomparisonwiththelithostratigraphicboundary,thebiostratigraphicboundaryandthetraditionalapproachoftheglobalstratotypesectionandpoint(GSSP).ByintegratingthevirtuesofthesequenceboundaryandtheGSSP,itisproposedthattheGSSPshouldbeestablishedintheconformableportionoftherelatedsequenceboundary.Theboundaryestablishedinlightofthisapproachisdefinedas

简介：基于中国908工程的最近的海底的地形学数据(中国近海海洋的环境全面调查和评价)，我们分析了一般中国近海影响它的发展的海底的地形学的特征和因素。离开中国的海岸的海底的地形学跟随陆地地形学的NW-SE趋势。海底的地形学的坡度与大约0.8%的一个平均坡度从0.2%～1.6%。深度轮廓与海岸变主要平行，并且在河口区域伸出到海。海底的地形学被地质的结构统治，它证明二的典型特征高举并且从北方的二个沉淀事件到向南。与不同沉积环境和复杂水动力学条件相结合的地质的结构生产了能被三种类型描绘的地形学：沉积的盆，压缩高举，和转变形式。在沉积的盆和压缩高举区域，地形学的波动是小的，沉积是有细密纹理的，并且水流流动在一个单个方向，导致有沉积平原的海湾并且在水下累积倾斜，它具有一样的构造起源。转变类型地形学被强壮的波动和混合尺寸沉积描绘粒子，平台和沿海的陡坡和架平原和侵蚀免职地形近海。这是不完全的差错块开发的结果并且重复违反。在免职改革区域(转变形式类型)，地形学有强壮的波动，沉积是粗糙的，潮汐的沙山脉在源自陆地供应的河口和集中地区是开发得好的，并且Holocene沉积是厚的，由潮，河流量，和水流转变了。

简介：长石和Pb(NO_3)_2在TAU=380degC被混合并且反应到synthesizePb长石。在XRD(X光检查衍射)产品的模式，五座山峰的d价值(踱步的晶体点阵)是0.654,0.342,0.332,0.327和0.257nm。XPS分析结果证明在长石的Pb4f_(7/2)的有约束力的精力在137.81之间-138.03eV。Pb~(2+)能通过离子交换反应在长石结构代替碱和碱地球阳离子形成Pb长石。

简介：Inrecentyears,aconsiderableamountofmicroscopicspheruleshavebeenfoundinconcentratesrecoveredfromsomestrataboundgolddepositsoccurringinMiddle-UpperTriassicturbiditeseriesinnorthwesternSichuan.Studyindicatesthatthesespherulesarecosmicdust.ItisthefirsttimethatcosmicdustofextraterrestrialoriginhasbeenfoundinhydrothermalgolddepositsinChina.Thespherulesaresteel-greyincolourandshowmetallicluster.Theirgrainsizeiscommonlylessthan100μm.Accordingtotheircomposition,theybelongtochromium-richironcosmicdust.Thespheruleshavecomplexanddiversemicroscopicstructuresandtextures,i.e.theyshowaverydistinctWidmanstatenstructure.Thevariationofcosmicdustcontentingolddepositsexhibitsapositivecorrelationwiththemineralizationintensitiesandhydrothermalalteration.Sucharelationindicatesthattheoresub-stancesmaytransportnotonlymechanicallybutalsomaychemicallyinhydrothermalsolutions.

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