简介：HistoricaldataregardingZhangHeng'sseismoscopeisnotsingularproof.Actually,thefourearliesthistoricaldocuments,i.e.,ContinuationofHistoriographyofHanDynasty,HistoriographyoftheLaterHan,BookoftheLaterHanandDingRecordallhaverelevantrecordsofitsstructure,size,principle,responsetoearthquakeandactualapplications.Thesefiveaspectsaresupportedbyarchaeologicalresearch,unearthedculturalrelics,historicalearthquakesandmodernseismologicalstudy.Thesehistoricalmaterialscontainagreatdealofspecificinformationaboutthisancientseismoscope.Inconclusion,theauthenticityandreliabilityofZhangHeng'sseismoscopeareverified.

简介：垫子是在木排和地面之间的小粒的材料的层。在垫子和木排之间的接口的shear行为可以影响上层建筑的地震表演。为了确定，这影响，水平砍在在monotonic并且周期的装载下面的不同垫子材料和具体木排之间的接口上的测试被执行。垂直压力Pv,材料类型和垫子厚度hc作为变量被拿。结论包括：1)在装载的monotonic下面，Pv是最重要的因素；shear抵抗Phmax作为Pv增加，而是抵抗n有一个相反的趋势；2)因为材料在这研究使用了，n从0.40～0.70变化，接口磨擦角度s从20变化

简介：Twoveryimportanthistoricalareashavebeenconsid-eredinthiswork.PiazzadellaSignoriawiththePalazzoVecchioandmanyotheroutstandingbuildings,isatypi-calexampleoftheuseofsandstonematerialscharacter-isticoftheFlorentinearea;PiazzadelDuomowiththeCathedralofSantaMariadelFiorestandinginthemid-dleis,ontheotherhand,anexampleofotherequallytypicallithotypessuchasthe"white"marbleandthe"red"and"greenmarbles"thatdecoratetheCathe-dral.Adetailedstudyaswellasthereliefandthemap-pingofthehistoricalbuildingsinPiazzadellaSignoriaandoftheCathedralofSantaMariadelFiore,haveledtothedescriptionofthematerialsthatmakethemupaswellastotheestablishmentoftheirquarryprovenance.

简介：Theparticlesizedistributionofbedmaterialsinthesandyriverbedofalluvialriversisimportantinthestudyoftopicssuchasfriction,riverbedevolution,erosion,andsiltation.Italsocanreflectthedependencyrelationbetweenriverbedsedimentandflowintensity.Inthispaper,thecriticalpatternofsedimentmovementinthenear-wallregionofasandyriverbedwasanalyzed.Accordingtotheprincipleofmomentumbalance,thecriticalsettling-risingconditionofbedmaterialinasandyriverbedwasfoundtobeinstantaneousturbulentvelocityequalto2.7timesthesedimentsettlingvelocityinquiescentwater.BasedonaverticalinstantaneousturbulentvelocitywithaGaussiandistribution,atheoreticalrelationforcalculatingtheparticlesizedistributionofbedmaterialsinasandyriverbedwithoutpre-knowncharacteristicgrainsizeswasdevelopedbysolvingastochasticequation.Theformulaisverifiedusingmeasureddata,andtheresultsshowthattheproposedformulawasinaccordancewiththemeasureddata.Thisstudyhastheoreticalsignificanceandpracticalvaluefordeterminingthebedmaterialparticlesizedistributionofthesandybedofalluvialrivers.

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简介：Seismicruptureproducedbyactivefaultingcausesgroundsurfacefracturingandseriouslydamagesbuildings.However,thefracturetracesareusuallyindistinctornon-visiblebecauseofcomplicateddeformationsinQuaternaryunconsolidatedmaterials,sotheirupperpartscanhardlybediscoveredonexploratorytrenches.Theaimofthispaperistostudythetypesoffaultruptureanddisplacementindifferentloosedepositbedsfromajointviewofmega-,meso-,andmicroscopicscales,andtofindthemarkandmethodfortimingthepalaeoseismicruptureonexploratorytrenches.

简介：Thenotableauthorityontectonicsandthehistoryofgeosciences,ProfessorCelalSengorfromIstanbul,hasproducedanotherremarkablebook-which,ashetellsthereader,grewrapidlyfromaninitialpaperintoamassivetome.JustasGeorgesCuvierlikedtheideaof‘burstingthelimitsoftime',soProfessorSengorhasagain‘burstthelimitsofapaper'!

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简介：Thesourceofore-formingmaterialshaslongbeenacontroversialfocusbothinmetallogenictheoryandinore-searchingpractice.Thisstudydealswiththeheliumandargonisotopiccharacteristicsofpyritesfrom11golddepositsandsomecountryrocksinthegoldmineralizationconcentratedareaswithinthethreemantle-branchstructuresintheregionofNorthHebeiProvince.Itisindicatedthat3He/4Heratiosinthegolddepositsarewithintherangeof0.93×10-6-7.3×10-6,withanaverageof3.55×10-6;R/Ra=0.66-4.93,averaging2.53;40Ar/39Arratiosvarybetween426and2073,withtheaveragevalueof40Arbeing8.32;andtheaverageof4He/40Arratiosis2.17.3He/4Heratiosingneissandgraniteintheperipheryoftheminingdistrictarewithintherangeof0.001×10-6_0.55×10-6,reflectingsignificantdifferencesintheirsources.3Heand4Hefallnearthemantle,asisshownintheHeconcentrationdiagram.Studieshaveshownthattheore-formingmaterialsinthisregionshouldcomefromthedeepinterioroftheEarth.Withthemulti-stageevolutionofmantleplume,ore-formingfluidsinthedeepinteriorweremovingupwardstoshallowlevels(crust).Undersuchcircumstances,therewouldbeinevitablyoccurcrust/mantlefluidmixing,sotheirnoblegasisotopiccharacteristicsareintermediatebetweenthemantleandthecrust.

简介：Ithaslongbeenacontroversyaboutthesourceofore-formingmaterialsofAu-Agpolymetallicdepositsbothinmetallogenictheoryandinore-searchingpractice.IntermsofalargewealthoftheisotopicstatisticsdatafromIndosinian-YanshanianendogenicoredepositsinnorthernHebei(generallyreferringtotheareasalongthenorthernpartofTaihangMountainsandnorthernHebei,thesamebelow),itisconsideredthattheore-formingmaterialscamefromthedeepinterioroftheEarth,whichhadmigratedthroughplumestotheEarthsurfacewhileex-periencedmulti-stageevolutionandthenemplacedprogressivelyinfavorablestructurallocitoformores.Theirisotopedatashowthat559sulfurisotopicdatafrom40oredepositsare,forthemostpart,withintherangeof-5‰-5‰,withahighdegreeofhomogenization,indicatingthatthesulfurisderivedmainlyfrommagma;200leadisotopedatafrom37oredepositsindi-catethattheore-formingmaterialsareprincipallyofmantlesourcethoughsomecrust-sourcema-terialwasinvolved;96oxygen,hydrogenandcarbonisotopedatafrom34oredepositsillustratethattheore-formingfluidsaredominatedbymagmaticwaterwhileothersourcesofwaterwouldbeinvolved.Itmaythereforebeseenthattheformationofendogenicdepositshasnothingtodowiththestrata.

简介：NumerousdarkenclaveswithdifferentshapesarefoundinJiulingNeoproterozoicgranitoids.PreciseLAICP-MSU-Pbdatingwasconductedonzirconsextractedfromtwomicrocrystallineenclavesamples,yieldingcrystallizationagesof822.6±5.8Maand822.2±6.2Ma,respectively.Theconsistentageswithinanalyticalerrorswiththehostgranitoidssuggestedthattheyweretheproductsofthesamemagmatism.Themicrocrystalline-dioriticenclavescommonlyshowplasticformsandcontainsimilarplagioclasemegacryststothehostrocks,andbothoftheenclavesandhostgranitoidsshowedacomplexcompositionandstructuralimbalanceinplagioclases.Furthermore,theapatiteswithaeuhedralacicularshapeoccurredwidelyinthemicrocrystalline-dioriticenclaves.Allofthesepetrographicfeaturesaboveimplymagmamixingisinvolvedintheirdiagenesis.TheenclavesandhostgranitoidsshowamarkedzircontraceelementdifferenceandHfisotopicsignatureswithoutcorrelationinzircontraceelementpairsbutformtheirownsystembetweenenclavesandhostgranitoids.Additionally,mostofthezirconsshowextremelyhighεHf(t)withεHf(t)=3.54?11.94fromthesouthernsamples,andεHf(t)=1.0?9.09fromthecentralregion.SomezirconswiththehigherεHf(t)aresimilartothezirconsfromthejuvenileislandarcintheeasternsegmentofJiangnanOrogen.IntegratedgeologicalandHfisotopiccharacteristicssuggestmicrocrystalline-dioriticenclaveswerederivedfromthepartialmeltingprocessoftheMesoproterozoiccrustwhichenrichedjuvenileislandarcmaterialsandmixedwiththegraniticmagmathatremeltedfromtheMesoproterozoiccontinentalcrustwhichrelativelyenrichedancientsedimentsandmixedwiththehostgranitoidindiagenesis.

简介：氦，铅和硫同位素组成上的研究Gejiu超级大的Sn-polymetallic矿床被执行。结果显示形成矿石的材料来自不同来源和存款是附加矿化作用的一个产品。存款被多来源和多时期矿化作用描绘，它经历了海底的热水的免职和迟了的Yanshanianmagmatic热水的矿化作用。Gejiu超级大的Sn-polymetallic矿床是多开始存款，这被保持。

简介：Pressuresolutionisacommonphenomenoninmassivesulphidezinc-leaddepositsofwesternCanadaandmayhavebeenanimportantfactorleadingtothemobilizationofore-formingmaterialsduringdiagenesis,deformationandmetamorphismofsedimentaryores.Thecontrolofductileshearzonesovergoldmineralizationcouldbeexplainedinviewofpressuresolutionofgold-bearingminer-alsundershearingstressandthetesultantmobilizationofthismetal.