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192 个结果
  • 简介:FocusingontheYangtzeRivereconomiczone,thepreviousgeologicalresearchesaresystematicallysummarized,resourcesandenvironmentconditionsandmajorgeologicalproblemswhichareneedingtobeconcernedinlandplanningandconstructionarestudied.Theresultsshowthattheresourceconditionsofcultivatedland,shalegas,geotherm,lithiumandsoonaresuperiorintheYangtzeRivereconomiczone,andtheresourcesandenvironmentconditionsareconducivetodevelopthemodernagriculture,cleanenergyindustryandstrategicemergingindustries.3×1013m^2farmlandswithoutheavymetalpollutionareconcentrated;therearethreenationallevelshalegasexplorationanddevelopmentbaseswithexploredreservesof5.441×1011m^3;geothermalavailabilityis2.4×109tofstandardcoaleachyear,equivalentto19%oftheamountofcoalin2014;Asia'slargestenergylithiummetaloredepositisfound.InsomepartsofYangtzeRivereconomiczone,therearesomemajorgeologicalproblemssuchasactivefaults,karstcollapse,groundsubsidence,landslide-collapse-debrisflow,affectingtheriver-crossingchannels,high-speedrailway,urbanagglomerationandgreenecologicalcorridorplanningandconstruction.Thoseproblemsshouldbeconcerned,andtherelevantsuggestionsandcountermeasuresareputforward.Meanwhile,theideastofurthersupportthedevelopmentoftheYangtzeRivereconomiczoneareputforward.

  • 标签: The Yangtze River economic zone Resources
  • 简介:在主要Yishui-Tangtou差错的脚墙的花岗石的碎裂岩withmylontization招待的Longquanzhan金矿床。在液包体的~3He/~4He比率从0。14~0。24R/Ra,近到那些,外壳来源helium.~(40),Ar/~(36)Ar比率被测量是289-1811,比那些稍微高大气的氩。氦和氩同位素的分析的结果建议形成矿石的液体从外壳主要被导出。δ~(18)O每千每千从静脉石英范围from-1.78液包体珍视到4.07,并且δD液包体珍视在-74per之间变化千并且-77每千。氢和氧同位素数据显示了为Longquanzhan金矿床的液体在矿化作用的过程与天落水混合了的那形成theore。这与从氦和氩同位素数据的结论一致。

  • 标签: 沂水县龙泉站金矿 沂沭断裂带 氦同位素成分 氩同位素成分 地质意义
  • 简介:Takingthenortheastseismiczoneasanexampleandbasedonthemagnitude-frequencydistributionprinciplesoftheG-RrelationshipandthestudyonthetemporalandspatialdistributioncharacteristicsoftheminimummagnitudeofcompletenessMCineachtimeinterval,thispapermakesastatisticalanalysisontheseismicityparametersoftheresearchareaandexplorestheinfluenceofthecompletenessofsmallearthquakedataontheseismicityparametersandseismichazardanalysis.Itshowsthatthecompletenessanalysisoftheregionalsmallearthquakesdataprovidesapossiblemeansforobtainingmoreaccurateseismicityparametersthatcanbetterrepresenttheactualregionalseismicitylevelforareasoflowseismicity.Theresearchmethodsofthisarticleanditsconclusioncanbeusedasareferenceforthecompletenessanalysisofearthquakedataandseismicactivityresearch.

  • 标签: 地震活动性参数 完整性分析 地震数据 地震带 东北 地震危险性分析
  • 简介:ThelocationandlateQuaternaryactivityoftheCentral-NorthSegmentoftheTaihangMountainsPiedmontfaultzonehavebeenstudiedbyshallowseismicsurveyandcombineddrillexploration.OurresultsshowthattheBaoding-ShijiazhuangfaultandtheXushuifaultwereactiveinthelatePleistocene,butthesouthXushuifaulthasbeeninactivesincethelatePleistocene.Themaximummagnitudeofpotentialearthquakeofthefaultsis6.0.

  • 标签: 晚第四纪活动 山前断裂带 太行山 浅层地震勘探 更新世晚期 晚更新世
  • 简介:Discriminationsinalocalchemical,fluidal,mechanicalandthermalprocessesinashearzonewillleadtometallogenicdifferentiationinalocalsection.Thispaper,basedonthegeneralgeologicalsettingoftheShibangougolddepositinXixia,Henan,dealswithpetrologicalandpetrochemicalsamplesofalteredrocksinthemetallogenicsectionandofmylonitesinthenon-metallogenicsectionofaselectedshearzone.Thediscriminationsinfluid-rockinteractionandpetrologicalmassbalancebetweenalteredrocksneartheorebodyandmylonitesintheshearzonearediscussedaswell.Theresultsshowthatthepetrologicalvolumeofalteredrocksinthemetallogenicsectionoftheshearzoneisalmostalwaysdilatantandthemylonitevolumeinthenon-metallogenicsectionisalmostalwayslost.Majorelementsinalteredrocksfromthemetallogenicsectionandinmylonitesfromthenon-metallogenicsectionalwaysshowatendencyofbeingenrichedanddepleted,respectively.Fluid-rockratiosinthemylonites(Nu=93.68-468.40)arelargerthanthoseofthealteredrocks(NC(Ⅳ)^s=36.11-216.67).Thegainandlossofmajorandtraceelementsfromthealteredrocksandmylonitesintheshearzoneareacompositeprocesstobeimportedandexportedbypercolatingfluidsaswellasofthelossanddilatancyofrockvolume.

  • 标签: 剪切带 金属矿物 水岩反应 金矿床 非金属矿物 糜棱岩
  • 简介:Shahre-BabakophioliteisapartoftheinnerZagrosophiolitebeltinIran.MajorpartsofintrusivemassesofShare-Babakophiolitearegabbroandplagiogranite.TheSiO2versusNa2O+K2Odiagramshowsthatthepalgiogranitesarerelatedtocalk-alkalineseries.Rareearthelementsexhibitrelativelysimilarpatternthatindicatestheserocksaresyngenetic.Also,REEpatternsdisplayanenrichmentofLREEcomparedtoHREE,andarecharacterizedbyflattoslightlyconcaveuppatternsfromGdtoYb.Suchpatternscontrastsharplywiththoseofplagiogranitesinmorecompleteophiolitesequences,suchastheSemailophiolite,Oman,ortheTroodosophiolite,Cyprus,andNeyriz,wherepatternsaremuchflatterandslightlyLREE-depleted.TheslightlyLREE-enrichedpatternsoftheShahre-Babakplagiogranitessupportapartialmeltingoriginforthem.ThelowTiO2,Nb,TacontentandhighLREEconcentrationsoftheShahre-Babakplagiogranitesindicatethattherockswerelikelyderivedfromtheanatexisofamphibolites,whichwererelatedtohydrothermalalterationofgabbrosinintra-oceanicback-arcbasin.

  • 标签: 斜长花岗岩 蛇绿岩带 大地构造 伊朗 矿物学 山脉
  • 简介:TakingtheHuaihetotheNvshanhusegmentoftheTanlu(Tancheng-Lujiang)faultzoneasthemainresearchtargettoexplorewhethertherehasbeennewactivitysincethelateQuaternary,andbasedontheinterpretationofremotesensingimagesandrepeatedsurfaceinvestigations,weexcavatedtrenchesatthesectionswherethetectoniclandformissignificant,identifiedandrecordedthedeformationpatternsofthefaultandanalyzedtheactivitybehavior.Samplesofnewactivityanddeformationwerecollectedandorientedslicesweregroundbasedonthesamples'originalstatetomakethemicrostructuralanalysisanddemonstration.Alloftheaboveresearchshowsveryclearlineartectonicgeomorphologyalongthefault,threetrenchesacrossthefaultzoneallrevealednewdeformationtracessincelateQuaternary.ThelateststratumdislocatedbythefaultisthelateQuaternaryandHolocene.Themainslipmodeisstickslip,asrepresentedtypicallybyfaultscarps,wedgeaccumulation,thefaultsandthefilledcracksandsoon.Ingeneral,itshowsthecharacteristicsofbrittlehigh-speeddeformationandbelongstotheprehistoricearthquakeruins.Theaboveunderstandingwasconfirmedpartiallybymicroscopicanalysis.Inaddition,thesimilaritiesanddifferencesandthepossiblereasonsforthecharacteristicsofthelatestactivitiesoftheTancheng-LujiangfaultzoneinthenorthandsouthoftheHuaiheRiverregionsarealsodiscussedinthispaper.

  • 标签: 郯庐断裂带 晚第四纪 新活动 淮河 郯城-庐江断裂带 变形模式
  • 简介:Thequantitativeinterpretationofgravityanomaliesduetoshallowstructuresneedsseparationbetweenlongwavelengthanomalies(regionalanomalies)andshortwavelengthanomalies(residualanomalies).Theregional-residualfieldseparationcanbecarriedoutusingthepolynomialmethod.Inthiscase,theso-calledregionalfieldofordernistreatedasapolynomialofdegreen.Thepresentstudyshowsthatthedegreenmustvarybetweenasmallestvaluenminandamaximumvaluenmax.Thisarticlepresentsamethodtoprocessgravitydatathatallowsdeterminationofnminandnmaxforagivenstudyarea.WeapplythemethodtogravitydataoftheSouth-WestCameroonzone.Inthischosenstudyarea,wefindthatregionalanomalymapsofordersrangingfrom1to9andresidualanomalymapsofordersrangingfrom1to8canbeusedforsuitableinterpretation.Theanalysesshowthatonemayneedresidualanomalymapsofseveralorderstoperformsatisfactoryquantitativeinterpretationofthedifferentintrusivebodiesfoundinagivenarea.

  • 标签: gravity REGIONAL ANOMALY RESIDUAL ANOMALY upward
  • 简介:TheGarouaZoneinNorthCameroon,thesubjectofthisstudy,isknowntohaveundergonetectonicmovementsduringtheCretaceous,butthezone’sstructuraldataremainpoorlyknown.ThisstudyexploitstheBougueranomalytoimproveknowledgeofGarouatectonicsstructures.Inordertocharacterizethesestructures,twomethodsareused:Euler’sdeconvolutionmethodandthemethodofthehorizontalgradientoftheverticalderivative.SuperpositionoftheEuler’ssolutionsmapforindexN=1withthemapfromthehorizontalgradientoftheverticalderivativemethodallowsdeterminationofgravimetriclineaments,interpretedasfaultsoraslinearcontacts,fromwhichwededuceastructuralmapofthestudyarea.Basedonthismap,weidentifysixteenlineaments,ofwhichwecounteightaslinearcontactsandeightasfaults.Amongthefaults,wedenoteoneofdepthbetween4and8km,fivefaultsofdepthrangingbetween8and13km,andtwofaultsofdepthsbetween13and36km.Analysisofthesefaultsshowsthatthesevendeepestfaultsmightpresentanaturalriskinourstudyarea.Forpurposesofcivilprotection,suchdeepfaultsshouldbemonitoredandtakenintoconsiderationintheimplementationoflargepublicworks.Thestructuralmap,establishedhereinfromdataonthein-depthextensionofeachfault,thusincreasesscientificknowledgeintheareathatcanbeusedtositepublicworksinwaysthatreducerisk.

  • 标签: Bouguer ANOMALY horizontal DERIVATIVE vertical DERIVATIVE
  • 简介:基于有安培计的察觉(CZE广告)的毛状的地区电气泳动,一个简单、可靠、可再现的方法包括paracetamol,维生素C,咖啡的酸和chlorogenic酸在VcYinqiao药片为四活跃成分的同时的决心被开发了。一个碳磁盘电极被用作工作电极和0.95V(对SCE)作为察觉潜力被选择。CZE实验的最佳的条件是30mmol??Д

  • 标签: 毛细管电泳分析 安培检测 扑热息痛 维生素C 咖啡酸 绿原酸
  • 简介:Yishu差错地区(Tanlu差错地区中间片断)在Presinian被形成。周期的构造活动和强壮的地震事件沿着差错地区发生了。在古苏格兰的运动的起始的阶段期间,与从Yishupaleo隧道海洋的违反继续到西方的山东,不平的厚沉积,主要沙,泥和碳酸盐创作了沿岸,泻湖,和浅海的外形,在Yishu差错地区和西方的山东被扔,并且构造了底部部分Liguan和Zhushadong形成的更低的寒武纪的在于。通过地观察和实验室考试,各种各样的paleoseismic记录在Liguan形成和Yishu差错地区和它的附近的Zhushadong形成被发现了,包括有被强烈地震触发的syn沉积的变丑结构的一些层(即seismite,seismo-olistostrome,和seismo-turbidite)。在Zhushadong形成开发的Paleoseismic记录主要是有软沉积的变丑结构的seismites,例如液化挤入构造,小液化碳酸盐的石灰泥火山,液化静脉,液化角砾岩,旋绕变丑(地震褶层),分级的差错,软硅质的静脉,和变丑stromatolite,象有semiconsolidated沉积的易碎的变丑结构的seismites一样。在Liguan形成保存的Paleoseismic记录是有商业萧条的不仅seismo-olistostrome褶层,负担结构,和ball-and-pillows,而且有卷绕旋转床上用品的seismo-turbidite,分级的床上用品并且起浪床上用品。然而在西方的山东区域,越离Yishu差错地区靠近,越greaterLiguan形成的厚度和Zhushadong形成,越多更大有paleoseismic的层的数字和类型记录,并且更高,地震紧张由地震记录的协会思考了。这条证据显示强烈地震事件伴随的构造taphrogenesis在古苏格兰的运动的起始的阶段期间发生在Yishu差错地区,它在那时间沿着Paleo-Tanlu差错地区表达了中国朝鲜语的板的分散。

  • 标签: 沂沭断裂带 加里东运动 地震记录 构造活动 地裂运动 郯庐断裂带
  • 简介:Longquanguan剪碎带是在NorthChina古地台的一条重要的结构的带,把内在的Fuping建筑群与overlyingWutai建筑群分开。这条剪碎带经历了变丑的三个事件:第一并且主要事件是ductiletop-to-ESE砍轻轻地西北西方蘸生叶,当另外的二个事件是以后的时,崩溃滑动。与shear生叶平行的延长花岗石做Longquanguan剪碎带的主要作文之一。这些花岗石经历了变丑到formmylonitic岩石什么时候他们emplaced在变丑的第一个事件期间。到围岩的花岗石和他们的接触的结构的人物显示这些花岗石可能由砍源于在原处偏爱的re-melting,即,他们是syn-deformational花岗石。这些mylonitic花岗石是的Monazitesinmagmatic矿物质和他们的结晶化年龄可以代表magmatic事件的年龄,并且另外为Longquanguan剪碎带的主要变丑的年龄。标明日期的独居石电子微探查被继续1,846妈和1,877妈在之中是为二件样品的主要山峰年龄的花岗石的二件样品,给多重山峰年龄,。这些年龄代表Longquanguan剪碎带的主要变丑,它与在碰撞在之间引起的大约1,850妈的主要地区性的地质的事件一致东方并且在诺思中国的WesternBlocks。在独居石年龄和相应regionaltectono热的事件之间的好火柴显示出独居石的可行性和可靠性电子microprobedating。

  • 标签: 独居石 克拉通 花岗岩 剪切结构
  • 简介:Pull-apartbasinsofthreescaleswerefoundalongtheHaiyuanfaultzone.Thelargestoneismorethan50kmlong,namedLaolongwanbasindevelopedinMiocene.Amodelwasbuilttocalculatetheamountofpull-apartofanextensionalbasin.Parametersusedincalculationincludethicknessandlengthofdepositionanddepthofdetachment.Theresultsofcalculationshowthattheamountofpull-apartoftheLaolongwanBasinisabout30km.Basedonpreviousstudiesandcalculatingbyusingtheaverageslipratemethod,amountofpull-apartoftheothertwosmallerbasinsare22kmand8km,respectively.Thus,thetotaldisplacementofstrikeslipalongtheHaiynanfaultzoneisabout60kin,whichisclosetotheoffsetoftheYellowRiverfromJingtaitoJingynan.

  • 标签: LATERAL DISPLACEMENT PULL-APART basin HAIYUAN FAULT
  • 简介:为木质的植物差异,结构和新生上的读经台州的福雷斯特里的这研究,70空铅,每25?在25的m?m,用一种系统的随机的采样技术和100的间隔被选择?沿着一根横断线的m。为估计幼苗和树苗,二2??楷桴?

  • 标签: 森林结构 植物多样性 木本植物 埃塞俄比亚 再生 西北部
  • 简介:EarthquakeeventsfromtheIndonesiansubductionzonerecordedinnorthernAustraliashowalongandhigh-frequencycodaassociatedwithbothPandSwaves.RegionaleventsrecordedbyWarramungaarrayinnorthernAustraliacanseparateoutwavepropagationthroughthemantlebyfocusingonthecoherentsignalacrossthemedium-aperturearray.Mostoftheincoherentwavecomponentsresultfromstructuresinthevicinityofthearraywithsmall-scalelengthsof1–2kmorsmaller.Thecoherentphaseswithrelativelyrapidchangesinwaveformsareassociatedwiththescatteringofseismicwavesbycrustalandmantleheterogeneity,butinsomecasecanberelatedtostructuraleffectsnearthesource.Asthedepthofthesourceincreases,thecoherentportionoftheseismicwavefieldtendstobecomemuchsimpler,whichsuggeststhattheheterogeneitytendstoweakenatdepthwithlarger-scalelength.WecomparethecoherentsignalfeaturesofearthquakesfromtheIndonesiansubductionzonethathaveoccurredinrecentyearswiththoseintheearly1980s,firststudiedbyKennett(PhysEarthPlanetInter47:319–332,1987).Thegeneralcharacteristicsofthecoherentsignalvariationwithdepthinrecentyearsarethesameasthoseobservedin1980s,butthevariationsarelarger.Thischangesuggestsastringervariationinheterogeneitywithdepththanbefore,whichmaybearimportantinformationaboutthedynamicprocessesandevolutionofthecrustanduppermantle.

  • 标签: 异质性 俯冲带 上地幔 印尼 地壳 相干信号