学科分类
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459 个结果
  • 简介:<正>ThenorthChinablockisborderedonthenorthbytheYinShan,onthewestbytheHelanShan,onthesouthbytheQinLing-DabieShan,andtotheeastbythesea.ThesouthChinablockisborderedonthenorthbytheDabaShan(QinLing)-DabieShah,onthewestbytheLongmenShan-DaliangShan,onthesouthwestbythegreatfaultalongtheRedRiver,andtotheeastandsoutheastbythesea.Thetopographyofthenorthissimpleandeven,likeatwo-stagedterracehigherinthewest.Thoughthatofthesouthisalsohigherinthewest,itisveryunevenwithaboundantlowerandmiddlemountainsandhills.TheQinLing-DabieShanisanarrowbeltwiththe

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  • 简介:Nanogeologyisasubjectthatisacombinationofgeologyandnanoscalescience,andithasbeenafrontierfieldinrecentyears.Itisalsoanewsubjectwiththefeaturesofintersectionalityandmultidisciplinary.Diggingdeeperintogeologicalproblemsandnanoscalephenomenahelpsbetterrevealingthemoreessentialmechanismsandprocessesingeologicalscience,whichisalsoanevitablepathinthedevelopmentofgeology.Inthispaper,weelaboratetheconcept,featureandmainsubdisciplines,andsummarizethreestagesofnanogeologydevelopmentfrompreliminaryresearchinthe1990stosubjectformationinChina.Aftersummarizingtheresearchers'achievementsinthisfield,weillustratesomeprimaryresearchprogressesofnanogeologyinChinaaseightsubdiseiplines.Onthebasisoftheabovecontent,weproposethedevelopmentprospectofnanogeologyinChina.Therearemanygeologicproblemswithscientificvaluesandeconomicbenefits,suchasresearchofgeologicfundamentalproblems,resourceexplorationanddevelopment,mechanismstudyandpredictionofgeologicalactivities(disasters),mechanismresearchandmanagementofenvironmentalpollutionandothers.NanogeologyhasagreatpotentialinChinatosolvealloftheseproblems.Asaresult,thetheoriesandmethodsofnanogeologywillbecomeenrichingandadvanced.Itoffersimportanttheoreticalbasisandtechnologicalmethodstodealwithmajorissuesconcerningthenationaleconomyandthepeople'slivelihoods,suchasthepredictionofgeologicalactivities,aswellasresourcedislributionanditsexplorationandutilization.

  • 标签: Nanogeology NANOPARTICLE NANOSTRUCTURE SCIENTIFIC FRONTIER RESEARCH
  • 简介:Asanimportantpartofanepidermicsystem,terrestrialdepositscanprovideagoodrecordofmajorgeologicaleventsintheCretaceousepidemicsystem.Thisarticleisareviewofthegeologicalbackground,paleogeography,paleoclimate,basinevolutionandsedimentarycharacteristicsinChinathroughtheCretaceousperiod,inordertoprovideacomprehensiveunderstandingforinterestedresearchers.DuringtheBerriasian-Hauterivianage,red-mainlyfluvialandshallowlacustrinedepositiondevelopedunderaridandsemi-aridclimatesinwestenChinawheneasternChinahadbeenoccupiedbythe"EastPlateau”.DuringtheBarremian-Albian,agecoal-bearingdepositionsoccurredtothenorthoftheYanshanMountainunderthewetandwarmclimate.However,mainlyredfluvialandshallowlacustrinedepositionsprevailedinmostofthesouthtotheYanshanMountainexceptbasinswhereseawatercouldenterandcausedmostlygreendepositions.DuringtheCenomanian-Santonianage,highlanduplifttookplaceinnorthwesternChina.MainlyreddepositionwithdevelopedalluvialplainsoccupiedsouthwesternChinaandSouthChinawhentheSongliaoBasinwasfilledbyblackdeeplacustrinemudshalecausedbytransgression.Mainlyreddepositionunderanaridandsemi-aridclimateoccupiedallbasinsinChinaduringtheCampanian-Maastrichtianage.

  • 标签: CRETACEOUS BASIN TERRESTRIAL DEPOSITS
  • 简介:ChineseAchaeangreenstonebeltsaremainlydistributedalongthenorthernandsouthwesternmarginsoftheNorthChinaplatform.Intermsoftheirgeologicalcharacteristics,thegreenstonebeltsinChinaarecomparabletothoseinothercountriesbutatthesametimehaveuniquefeaturesoftheirown.Inviewoftheirgeochemistry,theChinesegreenstonebeltsmaybegroupedintothreetypes:theJiapigoutype,QingyuantypeandXiaoqinlingtype.Thegreenstonebeltswereformedpossiblyinarift-typepalaeo-tectonicsetting,similartothatofthemodernislandare-continentalmarginmobilebelts.

  • 标签: ARCHAEAN GREENSTONE BELTS types of GREENSTONE
  • 简介:CopperdepositisoneofthemostimportantandwidespreadoresinChina.ThecoppermetalogenyinChinarevealsacomplicatedtectonicevolutionhi...

  • 标签: COPPER DEPOSIT CHARACTERISTICS China.
  • 简介:Chinacelebratedthe30thanniversaryofitsparticipationintheInternationalGeologicalCorrelationProgramme(IGCP)onNovember11,2003inBeijing.About200peoplefromtheMinistryofLandandResources.MinistryofScienceandTechnology,ChinaSeismologyBureau,NSFC,CNPC.SINOPECCORP.,ChinaGeologicalSurvey,ChineseAcademyofGeologicalSci-

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  • 简介:ThispaperdealswithafossiltaxonofBittacidae(Mecoptera,Insecta)collectedfromtheMiddleJurassicHaifanggouFormationinBeipiaocounty>Liaoningprovince,andconsideredtobeadiscoveryinChina.Basedmainlyonitssalientfeatures,anewgenus-Liaobittacusgen.nov-iserectedanditsaffinityandmigrationarealsodiscussed.

  • 标签: MIDDLE JURASSIC INSECTA MECOPTERA Liaobittacus gen.
  • 简介:源自陆地的siliciclastic的一个序列在Baxiandun外面摇庄稼,Qingdao,在在诺思中国之间的中生代collisional边界附近,块(网络控制块)和华南堵住(SCB)。这些低档变形了siliciclastic岩石被greywacke与页岩统治,manganiferous有细密纹理的沙岩,arkose和集团企业层。关于这些岩石的形成有二基本解释。一个人认为这个序列在网络控制块以内被形成,并且是白垩纪Laiyang组和Qingshan组的部分河的外形和暴烈的碎片外形出现在山东地区性的地质的地图上。另一条意见建议这些岩石表示在斜坡和盆外形的混浊depositional系统主要在奥陶纪被扔。重要地基于地观察,petrological分析,和大多数,在这的geochemical结果学习,在Baxiandun节的沉积阶层主要由siltstone,沙岩和mudstone岩性学组成。他们被深海的碎片和混浊存款在一个湖的斜坡和底统治。在Baxiandun节岩石标明日期的U-Pb由岩屑形成的锆石显示来源岩石是很复杂的,他们的年龄被改变从对早白垩纪太古代。源自陆地的岩屑的最年轻的年龄能代表沉积阶层的年龄。因此,我们推断沉积岩石属于早白垩纪深海的湖的沉积序列并且从SuluUHPorogen和华南块边缘的侵蚀有多重来源origined。

  • 标签: 中国南方 深水湖泊 白垩纪 青岛 序列 陆源碎屑岩
  • 简介:ThedevelopmentofmetamorphicpetrologytometamorphicgeologyinChinahasalonghistory.AncientbasementmetamorphicrocksaredistributedprimarilyintheNorthChinaCraton,theYangtzeBlockandTarimCraton.Theyaremainlymadeupofplutonicgneissandmetamorphosedsupercrustrock,transformedtogranulitefaciesthroughArcheanPaleoproterozoic.ManyofthePaleoproterozoicmetamorphicrockshaveundergonehigh-pressuregranulitefaciesmetamorphismwithaclockwisemetamorphicevolutionpath.Theultrahightemperature(UHT)granulitesfromtheLatePaleoproterozoicarefoundinNorthChinaCraton.Manyhigh-precisionchronologicaldatahaveallowedpreliminaryconstructionoftheformationandevolutionaryframeworkofdifferentmetamorphicbasements.Primarilytherearelow-temperatureandhigh-pressureblueschist,high-temperatureandhigh-pressuregranuliteandultrahigh-pressure(UHP)eclogitefaciesmetamorphicrocksinthePhanerozoicorogenicbelt.ThediscoveryofeclogiteintheSuluorogenandalargequantityofcoesiteinitscountryrocksshowthattherewasadeepsubductionofvoluminouscontinentalmaterialsduringthecollisionprocessbetweentheYangtzeblockandtheNorthChinaCratonintheEarlyMesozoicphase.Fromthestudiesof,forinstance,organicmattervitrinitereflectance,illitecrystallinity,illite(muscovite)polytypeandillite(muscovite)bdimension,theLatePaleozoicstrataintheeasternregionofInnerMongoliaandthenorth-centralregionofNEChinahaveonlyexperienceddiagenesistoanextremelylow-grademetamorphism.Thediscoveryofimpact-metamorphosedrocksinXiuyanareaofLiaoningprovincehasenrichedthetypeandcategoryofmetamorphicrocksinChina.Thephaseequilibriummethodhasbeenwidelyusedinthestudyofmetamorphismofmiddleandhigh-grademetamorphicrocks.Onthebasisofexistinggeologicsurveysandmonographicstudyresults,differentscholarshaverespectivelycompiled1:1500000MetamorphicGeologicalMapandSpecificationsofQinghaiTibetPla

  • 标签: METAMORPHIC PETROLOGY METAMORPHIC GEOLOGY METAMORPHIC P-T-t
  • 简介:TheoriginallocationsandrelationshipsoffourplateswithinthemainlandofChinafrom800to600MaduringtheterminalPrecambrianwerereconstructedbasedonthepalaeomagneticandgeologicaldata.TheTarim,YangtzeandCathaysianplateswereoncelinked(in800-700Ma)andlocatedinthesamelow-latitudezoneofthenorthernhemisphere.Butlater,in700-600Ma,theTarimplatewasseparatedfromtheYangtze-Cathaysianplate.TheSino-KoreanplatewasalwaysfarawayfromtheYangtzeplate,bothbeingseparatedbyoceaniccrust,andlayinthehigh-latitudezoneofthenorthernhemisphere.Theabove-mentionedpalaeogeographicframeworkdirectlyledtocompletedifferencesinrespecttodistributionoflow-latitudeglaciation,sedimentaryfacies,palaeoclimate,palaeobiogeographyandstratigraphicsectionsbetweentheNorthandSouthChinadomainsduringtheterminalPrecambrian.

  • 标签: Yangtze LATITUDE OCEANIC CRUST southeastern STRATIGRAPHIC
  • 简介:Tunggurian年龄在1984被提名,并且中国的地层学上的第二个国家委员会正式建议了建立相应chronostratigraphic单位,Tunggurian阶段,基于在1999的Tunggurian年龄。这个阶段的名字来自一个岩石层位学的单位,Tunggur形成,和stratotype节在Tunggur台地被定位,SaihanGobi镇区的15km东南,Sonid左旗帜,内部蒙古。Tunggurian年龄被相关到欧洲陆地哺乳动物年龄的Astaracian,并且他们与15.0妈的年龄在paleomagneticChronC5Bn.lr的底分享更低的边界的一样的定义。在Tunggur台地的东南的边上的Tairum也不节,这条边界在红褐色的连续存款以内是位于的Tunggur形成的更低的部分的巨大的泥石头,与从在节的中间的部分的浅灰色白人的沙岩的底的7.6m的距离。Tunggurian近似在国际地层学的图表被相关到海洋的Langhian和海洋的Serravallian的上面的部分。Tunggurian阶段包括二个晚第三纪哺乳动物动物区系的单位,即NMU6(MN6)和NMU7(MN7/8)。从Tairum也不节的Tairum也不动物志在Tunggur台地的西北的边上从地区对应于NMU6,和Tunggur动物志(sensostricto),例如Platybelodon石场,狼营地和Moergen,对应于NMU7。在在中国,从Linxia盆的Laogou动物志,Gansu,从Lanzhou盆的Quantougou动物志,Gansu,从北Junggar盆的Halamagai动物志,Xinjiang,和Dingjiaergou的中间的中新世的哺乳动物的动物志之中从Tongxin的动物志,Ningxia对应于NMU6。

  • 标签: 中新世 层型 古生物地层 古地磁地层学 中国
  • 简介:1.Examplcsofbauxitedeposits1.1.TheZhangpu,FujianProvince,andPenglai,HenanProvince,bauxitedepositstakebasaltaspar-entrock.TheparentrockoftheZhangpubauxitedepositisPliocenebasalt’Orcbodiesateintheformofplane,havingaspotadicdistributiona11dasmallarca.Accordingtothepositionofoccurrcnccofore-bodics,theyf

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  • 简介:这份报纸简短涉及中国的铀metallogenic类型,省,区域和带的分布。八个目标区域被指出了值得为铀资源勘探。地区性的铀metallogeny被讨论,大铀潜力从许多方面指出了。一般来说,有有利条件让铀矿化作用和好观点为铀资源探索。

  • 标签: 区域性矿床成因论 储量 中国
  • 简介:Dalingheornisliweii情报。etsp。nov,一只新enantiornithine鸟在东北中国从早白垩纪Yixian形成被收集。它是在中生代鸟中的一只高度专业化的异种扬抑抑格脚的第一个记录。有shorthypocleidum的塑造Y的叉突与另外的enantiornithines的不同。未成年者掌部比专业柔韧、长掌部。一条长多骨的尾巴与dromaeosaurids并且这样类似于那些的V形臂章20尾的vertebrae创作了,再加亮在鸟和非鸟的theropods之间的进化关系。保存得很好的小翼羽毛和一只异种扬抑抑格脚为Dalingheornis的树木的习惯提供充分证据。

  • 标签: 白垩纪 古生物学 鸟类 中生代
  • 简介:Sponsoredby:ChineseAcademyofSciencesNationalNaturalScienceFoundationofChinaPublishedby:ScienceinChinaPressChairman:ZHOUGuangzhao(ZhouGuangZhao)Editor-in-Chief:SUNShuExecutiveEditors:CHENYongMAZongjinOUYANGZiyuanSUJilanSUNHonglieWANGPinxianZHOUXiuii

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  • 简介:TherearethreetypesofshalegasresourcesinChina.Theresourcesarepresentinlargeamountsandarewidelydistributed.Marinefacies,transitionalfaciesandcontinentalfaciesresourceseachaccountforathird.Basedonresourcedistributions,therearemanywellspenetratedintotheSinian,Cambrian,Ordovieian,Silurian,Devonian,CarboniferousandPermianstrataoftheYangtzeplateanditsperiphery,theNorthChinaCratonandtheTarimBasin.ManyyearsofexplorationhaveindicatedthatthemarineSilurianLongmaxishalegasiswidelydistributedinsouthChinaandhasbeenindustrializedinitsproductionintheSiehuanbasin.TheshalegasfromtheCambrianNiutitangFormationandtheSinianDoushantuoFormationareimportantdiscoveriesinYichang,HubeiandZhenba,Shanxi.TherearealsoshalegasresourcesfoundwithintransitionalfaciesandcontinentalfaciesindifferentareasinChina.The"twoelementenrichmenttheory"hasbeensummarizedduringtheexplorationprocessofSilurianmarineshalegasintheSichuanBasin.Inaddition,horizontaldrillingandfracturingtechnologiesupto3500mindepthhavebeendeveloped.BasedontheunderstandingofshalegasaccumulationinacomplextectoniczoneoutsidetheSichnanbasin,apreliminarysummaryoftheformationofthe"conversefaultsynelinecontrolreservoir"and"paleoupliftcontrolreservoir"modelhasbeenconstructed.Thedominanttheoryof"Trinity"shalegasenrichmentandthehighyieldofthe"deepwaterLuPengxiangsedimentaryfaciesbelt,structuralpreservationconditionsandoverpressure"issummarized.Guidedbytheabovetheories.AnyelwellinGuizhouandEyangyelwellinHubeiweredrilled."Fourstorey"oilandshale"gasisfoundinthePermianQixiagroup,theSilurianShiniulanFormation,theLongmaxiFormationandtheOrdovicianBaotaFormationinAnyelwell.GoodshalegashasbeengoundintheCambrianNiutitangformationinianDoushantuoformationinEyangyelwell.Thispaperaimstosummarizeandreviewthemainprogress,theoreticaltech

  • 标签: SHALE GAS EXPLORATION ENRICHMENT ACCUMULATION THEORETICAL