首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 15 毫秒
1.
1.IntroductionAnimportantaspectofthestudyoftheGGT(i.e.GlobalGeoscienceTransect)istoreconstructthehistoryoftheterranesthattheGGTrunsacross(Mongeretal.,1985).Becausethesedimentsaretheproductsofvariousgeologicaleffectsinthegeologicalhistory,wecanreconst…  相似文献   

2.
1.IntroductionFig.1. TectonicpositionoftheDabieorogenicbeltandTanLufaultineasternChina  TheDabieorogenicbeltandTanLustrikeslipfaultaresituatedincentralandeasternChina,respectively(Fig.1).Theirevolutionaryprocesses,relatedtotheadjacentgeologicbloc…  相似文献   

3.
No.4Basictechnologyanddevelopmentofgeographicinformationsystem.WuXincai.(4):329-333.Thispaperanalyzesthebasicconceptandresear...  相似文献   

4.
周口店新发现的早更新世哺乳动物群   总被引:3,自引:0,他引:3       下载免费PDF全文
程捷  曹伯勋 《地球科学》1995,20(5):497-504,T001
描述了采自北就周口店地区早更新世洞穴堆积物中的哺乳动物化石,共计5月23属30种,主要有Crocichurasp.,LepusSP.,Hypolaguscf.brachypus,Alilepuszhoukoudianensissp.nov.,SciurotamiasPraecox,SPermophilus?sp.,Allocricetusehi,Cricetinusvarians,Cricetul  相似文献   

5.
1.IntroductionTheelasticsolidandviscousliquidaretwoextremesituationsforidealmechanicalmodels.Thereexistsagreatlywiderangebetw...  相似文献   

6.
1.IntroductionIngeneral,densityflowreservoirshavelowpermeabilitycharacteristics.Therefore,studyingtheirmicrocharacteristics,...  相似文献   

7.
1.Introduction  BecauseeasternChinaliesnearthesubductionbeltwhereoceanplateandcontinentalplatemeet,thediastrophicmovementhereisobviouslyinfluencedbythesubduction,andismanifestedinallkindsofgeologicalphenomena.Therearedifferentblocksformedinthegeolog…  相似文献   

8.
1.IntroductionFig.1. RegionalgeologyoftheeasternLiaoningSouthernJilinarea(AfterZhang,1984)  ThePaleoproterozoicvolcanicsedimentarysequence,i.e.,theSouthLiaoheGroupandNorthLiaoheGroup,extendsbetweentwoArchaeancratons(Fig.1).Abundantmineralresources…  相似文献   

9.
1.IntroductionLandslideisageologicalhazardcausedbynaturalfactorsorhumanengineeringactivities.ItdistributedwidelyinsouthwestCh...  相似文献   

10.
1.IntroductionAnimportantquestioningeomechanicsengineringnumericalanalysisishowtoselecttheparametersofrockorsoil.Experimentda...  相似文献   

11.
1.IntroductionInbeddingslopesofrockmass,whenthestructuralplaneofslopefootisn′tfree,therockmasfailurecontainscolapse.Thecolaps...  相似文献   

12.
1.Introduction  Uptonow,moreandmoregeologistsputemphasisonthefluidgeologyofmetamorphicrocksbecausefluidgeologyisanimportantwaytoanindepthstudyofinteractionbetweenfluidsandrocks.However,amongmanymethodstostudythemetamorphicfluids,therearetwomainmet…  相似文献   

13.
1.IntroductionPetroleumexplorationisaspecialapplicationarea.Normalrelationdatabaseisnotusefulforthisarea.Nestingrelationdatam...  相似文献   

14.
1.IntroductionPuxiareaisanosestructureatwesternpartofDaqingplacantcline.Itisahigherdegreeexplorationareafoundin1963.Therearem...  相似文献   

15.
皖南变质岩中的疑源类,孢粉化石组合及其地质意义   总被引:1,自引:0,他引:1  
陈冠宝  陶正 《地质学报》1996,70(4):374-382,T002
皖南变质岩区地层原被认为属江南古陆的一部分,时代定为中、晚元古代。本文根据其中所含的Asperatopsophosphaera? sp.,Trachysphaeridium sp.,Nucellosphaeridium sp.,Leiosphaeridia sp.,Baltisphaeridium spp.,Micrhystridium spp.和scolecodonts等疑源类和其它微体化石及笔  相似文献   

16.
1.IntroductionThedeformationofrockmasunderappliedloadisveryimportanttopicinengineringgeologyandgeologicalmechanics.Theunloadd...  相似文献   

17.
1.IntroductionThesystematictheoryinRockMasEngineeringGeologyistheRockMasEngineeringGeomechanicsestablishedbyGuDezhen(1979).He...  相似文献   

18.
Barium Anomaly and Its Geochemical Significance   总被引:2,自引:0,他引:2  
1.Introduction  Multielementvariationdiagramsareveryusefulinthegeochemicalstudy.OneofthemisthePearcediagram,theMORBnormalizedmultielementvariationdiagramgivenbyPearce(1983).ThisdiagramshowstherelativedepletionsofHFSelementsNb,TiandP.Inaddition,the…  相似文献   

19.
1.IntroductionVariousmechanicalproblemofundergroundrockmaswhichisnormalywithalargenumberofdefectssuchascracksareofteninvolved...  相似文献   

20.
INTRODUCTIONTheconceptofpressurecompartmentwasdevelopedpri-marilybyD.E.PowleyandJ.S.Bradleyintheearly1970s,whohaveusedthiside...  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号