简介：

简介：

简介：TheMayangCudeposit,westernHunanisamiddle-scalesandstone-typeCudepositpredominantofnativecopper.Fromanangleofgeologicalintegrativefield,fracturegeochemicalfeaturesarestudidedanddiscussedinthispaper.Infracturestructure,variantregularityandtheratiosofelementcouplesparticipatinginmetallogensisthattheirgeochemicalnaturesaresimilarorstronglycorrelative,revealchanginglawsofmetallogenictemperatureandpressurefieldsandmigratingdirectionofmetallogenicelements.Thetheoreticalstudytalliesmuchbetterwithproductivepractice.Theyaremeaningfultoconductprospectingandexployation.

简介：<正>Nowtheminingofhighsaltundergroundbrinehasbeenanimportantaspectofsaltlakemining,whichisthenecessarysupporttothedevelopmentofnationaleconomy.Withthechangeofundergroundgeological

简介：Inthepasttwentyyears,theproportionofcoalinprimary-energyconsumptioninChinaisgenerallybetween71.3%and76.5%.Theoutputofcoalwas1.374billiontonsin19%,and1.21tonsin1998,whichrankedfirstintheworld.NowcoalisminedmainlywithmechanizationinChina,whichisplannedtoreach80%inmajorState-ownedcoalminesin2000accordingtotheplanningofthegovernment(Lietal.,1998;TangDejin,1998).ComparedwiththeUSAandAustralia,Chinahasmorecomplexcoalgeologicalstructures.Basedonhigh-resolutionseismictechniqueincoalexploration,anewseismictechniquewithhigh-precisionandhigh-resolution(2-Dand3-D)hasbeendevelopedforthepurposeofdetectingsmallgeologicalstructuresincoalmineconstructionandproductiontomeettheneedsoflarge-scalepopularizationofmechanizedcoalmininginChina.Thetechniqueislowincostandrequiresarelativelyshortperiodofexploration,withhighprecisionandwide-rangeapplications.Inthemiddleoft

简介：

简介：

简介：Thestructuralpropertiesofjadeiteathighpressures(0.0001-30GPa)areinvestigatedusingplane-wavepseudopotentialdensityfunctionaltheorymethod.Asafunctionofpressure,themonocliniccellparameterswerecalculatedandthecompressibilitycoefficientsare0.0026,0.0023and0.0026GPa-1,respectively.Thebondlength,bondangleanddistortionvariationwerestudiedinordertoobtaintheinformationofpolyhedralcompression.Thepressure-volumeequationofstatewasconsideredinordertoobtainthebulkmodulusK0.ComparisonbetweenthecalculatedK0valuesandtheexperimentaldatasuggestedthatthemodelprovidesreasonableinsightsintocrystallographicandphysicalpropertiesofjadeite.

简介：

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

简介：

简介：Naturalgascontaininghydrogensulphide(H2S)hasbeenfoundinseveralpetroliferousbasinsinChina,suchastheSichuanBasin,BohaiBayBasin,OrdosBasin,TarimBasin,etc.NaturalgaswithhigherH2Scontents(H2S＞5%mol.)ismostlydistributedinboththegasreservoirsofDukouhe,Luojiazhai,PuguangandTieshanpo,whichbelongtotheTriassicFeixianguanFormationinthenortheasternSichuanBasinandthoseoftheKongdian-ShahejieformationsinthenortheasternJinxianSagoftheJizhongDepression,BohaiBayBasin.IntheSichuanBasin,theH2Scontentsofnaturalgasaverageover9%andsomecanbe17%,whilethoseoftheBohaiBayBasinrangefrom40%to92%,beingthenoneofthegasreservoirswiththehighestH2Scontentsintheworld.Basedondetailedobservationandsampleanalysisresultsofatotal5000mofcorefromover70wellsintheabove-mentionedtwobasins,especiallysulfurisotopicanalysisofgypsum,brimstone,pyriteandnaturalgas,alsowithintegratedstudyofthegeochemicalcharacteristicsofhydrocarbons,itisthoughtthatthenaturalgaswithhighH2Scontentsresultedfromthermochemicalsulfatereduction(TSR)reactions.Amongthem,thenaturalgasintheFeixianguanFormationresultedfromTSRreactionsparticipatedbyhydrocarbongas,whilethatintheZhaolanzhuangoftheJinxianSagbeingtheproductofTSRparticipatedbycrudeoil.DuringtheconsumptionprocessofhydrocarbonsduetoTSR,theheavyhydrocarbonswereapttoreactwithsulfate,whichaccordinglyresultedinthedrycoefficientofnaturalgasincreasingandthecarbonisotopesbecomingheavier.

简介：Thepetrologicalresearchontheultra-highpressuremetamorphism(UHP)ofcollisionalorogenindicatesthattheupper-crustalrocksissubductedtodepthsexceeding100km,andreturnedtothesurfacerapidly.Inthisstudy,weinvestigatethethermalstructureofcollisionalorogenasaslabofcontinentallithospherebeingsubductedbeneathanoverridingwedgeofcontinentallithospherebythe2-Dfiniteelementmethod.Theadvectionheattransferduetotheaccretionoforogenicwedgeisconsidered.

简介：在从Libixia节的Jialingjiang形成的破裂的大多数静脉mineralsdeposited，Hechan区域包括大量僵绳白云石和伴随的天青石，方解石和荧石。这研究分析了性质，来源，由飞机光岩相学的液体的进化，液体包括方法，阴极射线发光图象，和稳定的同位素的作文。在白云石的二阶段的水的液体包括的homogenization温度在100和270°C之间变化。与δ18O数据，为破裂屑的降水负责的液体有δ18在10‰之间的O值并且18‰(相对降雪)。僵绳白云石和伴随的矿物质是在提高的温度的稠密的盐水的活动的结果。而且，液体从导出水兵的盐水的混合物被导出并且更深传播的分析表演流动。这液体在成岩作用期间在Sr被充实并且在骨折并且为地区性的矿化作用形成了天青石。僵绳白云石的溶解被归因于冷却Mg/Ca-decreased液体，它可以联系到一在包围碳酸盐石膏沥滤到天青石。

简介：领域分析和微分interferometry源于2008年5月12日Mw的震央的区域的合成的孔雷达(PALSAR)8.0Wenchuan()地震地区关于差错破裂和地面排水量披露详情与沿着主要差错破裂的踪迹到达12m的记录地的垂直偏移量，并且测量PALSAR的水平排水量到达12.3m。我们记录在差错陡坡上滑动指示物然后开始显示出亚horizontal日益增多地更陡峭在2min地震期间沿着一样的差错与时间滑动增长，建议作为混合模式IIIII宣传的破裂断裂，与在震中向北从起始的破裂指导精力到点的尖端的罢工滑倒运动，在滑动区域的内部由垂直排水量列在后面。地，地震、测量PALSAR的排水量主导地在震央的区域附近被插入，并且在右在东北区域，显示出那滑倒在地震期间在空间和时间沿着差错被划分。变化滑动方向有精力的三主要脉搏的相互关联可以在由震动图记录了的地震期间在0，23，和57s释放。地震产生了巨大的山崩>沿着差错的踪迹的震中的100km北方。在全部山腹下面在高速度崩溃了并且移动的地方，形成的这些巨大的sturzstroms占据了山山谷，跳更小的山和ricocheting离开陡峭的峡谷墙。这些雪崩骑了水的垫子并且压缩了从在碎片下面产生了空气强风的空气，高在反对山斜坡上将树击倒。巨大的山崩和地面变丑的集中到目前为止向北震中与向北方沿着差错集中地震精力的模式II-III破裂繁殖有关，解释破坏为什么如此发生了>从震中的100km，例如在Beichuan的破坏城市里()。理解在占据多山的区域与巨大的地震联系的近表面的地震过程和地质的危险有潜力以后救许多命。

简介：HighcutslopeshavebeenwidelyformedduetoexcavationactivitiesduringtheperiodofimmigrantrelocationinthereservoirareaoftheThreeGorges,China.Effectivereinforcementmeas-uresmustbetakentoguaranteethestabilityoftheslopesandthesafetyofresidents.Thisarticlepre-sentsacomprehensivemethodforintegratingparticleswarmoptimization(PSO)andsupportvectormachines(SVMs),combinedwithnumericalanalysis,tohandlethedeterminationofappropriaterein-forcementparameters,whichguaranteebothslopestabilityandlowerconstructioncosts.Therelation-shipbetweenreinforcementparametersandslopefactorofsafety(FOS)andconstructioncostsisin-vestigatedbynumericalanalysisandSVMs,PSOisadoptedtodeterminethebestSVMperformanceresultinginthelowestconstructioncostsforagivenFOS.Thismethodologyisdemonstratedbyaprac-ticalreservoirhighcutslopestabilisedwithanti-slidingpiles,whichislocatedattheXingshan(兴山)CountyofHubei(湖北)Province,China.Thedeterminationprocessofreinforcementparametersisdiscussedprofoundly,andthepilespacing,length,andsectiondimensionareobtained.Theresultspro-videasatisfactoryreinforcementdesign,makingitpossibleasignficantreductioninconstructioncosts.

简介：同位素在在地球科学跟踪并且标明日期起一个重要作用，特别87Rb-86Sr系统。与地球科学的发展，整个岩石的分析斜面足够地满足要求因为科学研究和微量分析变得越来越重要。激光脱离多收集者诱导地联合的血浆mass-spectrometry(LA-MC-ICP-MS)广泛地由于它的低样品消费在微地区的分析被使用了，高精确性在矩阵上的situ和低要求，但是当它被严重优秀辨别和集体光谱干扰的各种各样的类型限制，精确地与高Rb/Sr比率和低Sr内容特别为样品测量Sr同位素作文仍然是困难的。因而，热电离mass-spectrometry(提姆)分析同位素的比率的最精确、精确的方法，仍然是分析Sr比率的最流行的方法，特别为有低Sr内容的样品。这篇论文在low-Sr的高精确的Sr同位素分析上做系统的评论地质的样品包括微采样的技术，极端低的程序的空白的化学方法和提姆测量技术。极端低的程序的空白和提姆的联合能被用来与ng大小执行样品的高精确的微量分析，它将无疑是为Rb-Sr地球年代学，地球化学和环境研究的一个重要方向。

简介：Therearefourunitsofhigh-pressuretoultrahigh-pressuremetamorphismextendingfromsouthtonorthacrosstheTongbai-DabieMountains:theepidote-blueschist-faciesunit,thelow-temperatureeclogitefaciesunit,theultrahigh-pressureeclngitefaciesunitandthemedium-temperatureeclogitefaciesunit.ThelatertwounitswereformedduringtheCaledoniansubductionbetweentheTongbai-DabiemicroplateandtheNorthChinaplate,theformertwounitsaretheproductsofIndosiniancontinental-continentalsubductionandcollisionbetweentheYangtzeandtheNorthChinaplates.

简介：摘要：体积与在SuluUHP岩石上套印的Tan-LuHP糜棱岩porphyroclasticphengite，neoformedphengite和他们的混合物分开与40Ar/39Ar被分析步加热方法。从ultramylonite的neoformedphengite的二件样品给40Ar/39Ar209.9的高原年龄吗？

简介：Thermalmaturationandpetroleumgenerationmodelingofshalesisessentialforsuccessfulexplorationandexploitationofconventionalandunconventionaloilandgasplays.Forbasinwideunconventionalresourceplayssuchmodeling,whenwellcalibratedwithdirectmaturitymeasurementsfromwells,cancharacterizeandlocateproductionsweetspotsforoil,wetgasanddrygas.Thetransformationofkerogentopetroleumisassociatedwithmanychemicalreactions,butmodelstypicallyfocusonfirst-orderreactionswithratesdeterminedbytheArrheniusEquation.AmisconceptionhasbeenperpetuatedformanyyearsthataccuratethermalmaturitymodelingofvitrinitereflectanceusingtheArrheniusEquationandasingleactivationenergy,toderiveatime-temperatureindex(∑TTIARR),asproposedbyWood(1988),isflawed.ThisclaimwasinitiallymadebySweeneyandBurnham(1990)inpromotingtheir'EasyRo'method,andrepeatedbyothers.Thispaperdemonstratesthroughdetailedmulti-dimensionalburialandthermalmodelinganddirectcomparisonofthe∑TTIARRand'EasyRo'methodsthatthisisnotthecase.The∑TTIARRmethodnotonlyprovidesaveryusefulandsensitivematurityindex,itcanreproducethecalculatedvitrinitereflectancevaluesderivedfrommodelsbasedonmultipleactivationenergies(e.g.,'EasyRo').Throughsimpleexpressionsthe∑TTIARRmethodcanalsoprovideoilandgastransformationfactorsthatcanbeflexiblyscaledandcalibratedtomatchtheoil,wetgasanddrygasgenerationwindows.Thisisachievedinamore-computationally-efficient,flexibleandtransparentwaybythe∑TTIARRmethodthanthe'EasyRo'method.Analysisindicatesthatthe'EasyRo'method,usingtwentyactivationenergiesandaconstantfrequencyfactor,generatesreactionratesandtransformationfactorsthatdonotrealisticallymodelobservedkerogenbehaviourandtransformationfactorsovergeologictimescales.