简介：TheCommissionfortheGeologicalMapoftheWorld(CGMW),anIUGSaffiliatedbody,hasjustissuedthefirsteditionoftheStructuralMapoftheIndianOceanwhichwaspresentedduringthe32ndIGC(Florence).Duringthe1980's,theCommissionpublishedtheGeologicalAtlasoftheWorld,whichincludedthemapsofthe5oceansoftheglobe.Twodecadeshaveelapsedandtheknowledgeofthesea-floorexperiencedverysignificantprogress;thereforesome5yearsago,theCommissiondecidedtolaunchanewtypeofoceanmapping.TheStructuralMapoftheIndianOceanisthefirstofthisnewseriesofmaps.

简介：白垩纪碳酸盐存款在伊朗的西北是更加广泛地分布式的并且形成大多数沉积单位与尖不顺从在这些单位上扔了的区域和不同新生代的paleohighs。西北的伊朗的白垩纪stratigraphic单位能被划分成三个主要范畴：碎屑状的、浅碳酸盐并且远洋。碎屑状的外形包括集团企业，角砾岩和有细密纹理的碎屑状的组和碳酸盐外形由公海(A)，酒吧(B)，泻湖(C)，和潮汐的公寓的microfacies的系列组成。有不同踪迹石块的相对深的碳酸盐存款也是在伊朗的西北的白垩纪沉积环境的更深的部分的指示。与狭窄的Neotethys海洋(Khoy-Zanjan)的扩大的参考，架边缘Neotethys海洋的沉积环境能为Azarshahr大不里士区域被假定，在Varaghan的海岸的flysch和clastics外形在此随深度的增加向北部分扔了。由在现在的学习期间使用不同沉积外形的狭窄的Neotethys海洋的扩大上的调查被看作在伊朗和中东的西北的区域完成白垩纪时间的paleogeographic数据的重要的步。

简介：我们检验了为锰小瘤和外壳在收集的功课期间从中央印度洋盆(CIOB)恢复的超过五十使硬化的沉积。样品与palagonite一起或在锰小瘤的原子核以内作为铁锰合金氧化物在上或在改变的海洋的暗岩的底层上是在场的或在改变的海洋的暗岩的底层上的平板发生。矿物学上和作文联盟者，样品显示出phillipsite，palagonite和montmorillonite的混合物。我们建议火山发生在CIOB的遗传因子的先锋受到在低温度条件的影响下面改变改变的度，导致zeolitic泥土石头的形成。CIOB样品有类似到在世界海洋从各种各样的地点报导的那些。

简介：ManganesenodulesinareasCPandCCofthecentralPacificarerichinREE.Comparativelyspeaking,theREEcontentsofnodulesinareaCParehihgerthanthoseinareaCC;andtheREEcontentsofnodulesfromseamountsarehigherthanthoseofnodulesfromsea-floorplainsandhills.Withinthenodules,theREEshowazonaldistribution.TheREEdistributionpatternsofthenodulesaresimilartothoseofthesedimentsandhaveamirrorimagerelationshipwiththoseoftheseawater.TrivalentREEwerenotobviouslydifferenti-atedwhentheyenteredintothenodulesfromtheseawater.AmajorfactorcausingthedifferenceofREEabundancesbetweennodulesandsedimentsistheredoxconditions.TheredoxintensityoftheoceanfloorofthePacificiscontrolledmainlybyAntarcticBottomWat-er(AABW),Theiron-bearingfaciesinthenodulesisthemaincarrierofREE.

简介：Three-componentOceanBottomSeismometers,portablelandstationsandmarineairgunseismicsourceswereusedtocarryoutanonshore-offshoredeepseismicprofileinnortheasternSouthChinaSea.Thisprofile,orientatedinNNW-SSE,wasaslongas500kmandperpendiculartothestrikeofregionaltectonics.TheoffshoredatawereprocessedinTaiwanOceanUniversityusinganumberofavailablesoftwareandtheonshoredatawereanalyzedinSouthChinaSeaInstituteofOceanologybynew-writtenprogramsandpublicsoftware.Preliminaryresultsshowthattheseismicdataareingoodqualityandcontainrichinformationofdeepstructure.Seismicphases,e.g.Pg,PmPandPn,areidentifiedintheoffsetrange5～220kin,whichwillprovideanimportantdatasetforthedeepcrustalstructureandoil-gasbasinevolutionstudiesofthisregion.

简介：Mantleperidotiteswereearlyexposedatthesea-flooroftheJurassicTethysderivedfromthesubcontinentalmantleoftheEurope-Adriasystem.Duringcontinentalriftingandoceanicspreading,theselithosphericperi-dotiteswerepercolatedviadiffusereactiveporousflowbymeltfractionsproducedbynear-fractionalmeltingoftheupwellingasthenosphere.Ascendingmeltsinter-actedwiththelowerlithosphere,dissolvingpyroxenesandprecipitatingolivine,andcrystallizedatshallowerlevelsinthemantlecolumncausingmeltimpregnation.Subsequentfocusedporousflowformedreplacivedunitechannels,cuttingtheimpregnatedoeridotites,whichwereconduitsforupwardmigrationofMORB-typeliq-uids.Meltmigrationproduceddepletionlrefertilizationandsignificantheatingofthepercolatedlimpregnatedmantle,i.ethethermochemicalerosionofthelitho-sphere.Impregnatedandthermallymodifiedlithos-phericmantlewascooledbyconductiveheatlossdur-ingprogressivelithospherethinningandwasintrudeabyMORBmagmas,whichformedMg-richandFe-richgabbroicdykesandbodies.Alpine-Apennineophioliticperidotitesrecordthedeep-seatedmigrationofmeltswhichchangedtheircompositionsanddynamicsduringtheriftevolution.Thethermochemicalerosionofthelithosphericmantlebytheascendingasthenosphericmelts,whichinducessignificantcompositionalandrhe-ologicalchangesinthelowerlithosphere,isamajorprocessintheevolutionofthecontinent-oceantransi-tiontowardsaslowspreadingoceanicsystem.

简介：在Shennongjia区域的Doushantuo继任的地球化学和paleogeography不足地被学习了。这里，我们在碳上报导，EdiacaranDoushantuo的氧同位素作文在Shennongjia区域从四节(Longxi，Muyu，Yazikou和Songluo)盖住碳酸盐。一个大C同位素的坡度(~5)在Longxi和Songluo节之间，这里第一次识别了，被推断到被光合作用动态地在深水里在表面水和溶解的器官的碳(文档)的厌氧的氧化里维持了。在在四节之中的C同位素chemostratigraphy的空间变化与Marinoan冰期后的海平面的举起变化有关。在Longxi，积极13C在包含像圆锥形帐蓬的结构的地平线下面的carb移动在早回归期间源于强烈光合作用。否定13C在圆锥形帐蓬地平线以内的carb移动被与13弄空C的溶解的无机的碳(DIC)在迟了的回归期间。积极13Ccarb旅行在最高帽子碳酸盐的部分与有关在早违反期间提高主要生产率和有机物埋葬。在Muyu，碳同位素的变化趋势，在Longxi类似于那，可能被表面水环境温和地影响了。在Songluo，积极13C直到在帽子碳酸盐的更低的部分的-4，carb旅行可能在深水里与methanogenesis被联系在期间晚，到早回归并且随后的违反在迟了的回归期间由于甲烷水合物的分解消失了。在Yazikou，一致地稳定的13C在-4附近的carb价值显示帽子碳酸盐可能在中间的水深度扔了。是由学习节的诊断沉积特征证实了，Shennongjia区域的palaeogeographic框架展出了在雪球土的余殃在早Ediacaran时期期间从SE加深到NW。

简介：Thehigh-pressuremetamorphosedGridinodykeswarmcomprisesamajorgroupofMesoarchean2.87-2.82GamaficdykesintrudedwithintheMesoarcheancontinentalcrustoftheKolacraton(theBelomoriantectonicprovince

简介：Remnantoceanbasinisakeytounderstandtheplatesuturingandsubsequentupliftanderosionoforogen.TheBayofBengalBasin(BOBB)providesatypicalexampletoanalyzetheremnantoceanbasinstructures,evolution,andrelationshipsbetweendepositionalfillingandupliftingoftheHimalayanOrogen.Thirty-nineseismicprofilesaswellasintervalvelocitiesofwellBODC3wereusedtocompileisopachmapsofthebasin.Amongtheseismicdata,26seismicprofileswereappliedtoestablish8crosssections.Thecrosssectionssuggestthebasinisasymmetric,boundedtothewestbytheeasterncontinentalmarginofIndia(ECMI)withgraben-horstandtotheeastbytheSundaconvergencemargindominatedbytrench-arcsystem.TheBOBBischaracterizedbyaprominentdownflexurestructurescausedbyhugeamountofBengalfanturbiditesedimentsaccumulation.OurisopachmapsandchronologydatacollectedfromadjacentregionsrevealtheinitialdevelopmentandfastsouthwardgrowthoftheBengalfanwererelatedtotheearlyandmajorstageupliftanderosionoftheHimalayanOrogen,respectively.TheBOBBhasexperiencedacriticaltransitionfromanoceanbasintoaremnantoceanbasinatLateOligocene.SuchbasinstructuresandevolutionfeaturesindicatetheBOBBprovideswholerecordsofobliqueconvergenceoftheIndiaandAsiaplates,andtheearlyandmajorstageevolutionoftheHimalayanOrogen.

简介：处于海洋的氧化还原作用条件的一个重要变化发生在Ediacaran寒武纪的转变期间，这通常被考虑。然而，当前有二个学生，在深水的氧化的度上冲突看法(oxic对铁)在这间隔期间。迄今为止，早寒武纪的海洋的氧化条件一直不是抑制的井。早寒武纪的海洋的氧化大小和机制能对寒武纪的爆炸的重要生物进化批评。抑制早寒武纪的海洋的氧化还原作用环境，我们在铁和硫同位素和氧化还原作用敏感的元素上进行了综合研究(瞬间，U，并且V)从二浅节(Meishucun和Gezhongwu)和从Yangtze站台的更深的水节(Zunyi)的更低的寒武纪的磷钙土存款，华南。近零56从这里学习的二浅节的Fe价值在更低的磷钙土免职反映oxic条件。在56Fe和氧化还原作用敏感的元素内容在二浅水节的中间的部分被观察，它可能在suboxic下面在早成岩作用期间由dissimilatory铁减小反映轻铁的损失在站台的浅水。然而，高度积极的56在深节的Fe价值能在缺氧的深水下面反映溶解Fe(II)的更低的氧化度。数据建议成层氧化还原作用的海洋的条件在期间早寒武纪，在哪个完全氧化的浅水(平台)与缺氧的深水(斜坡)共存了。我们建议溶解的器官的碳(文档)的那延长upwelling，Fe(II)-并且在成层氧化还原作用的海洋的充满磷的缺氧的深水能与开的海洋增加了交换，在oxic-suboxic导致主要磷钙土免职调节。海洋的进步氧化可能便于早寒武纪的关於生命的多样化。

简介：在我们讨论基于含碳二叠的stratigraphic的领域调查预定Paleo亚洲的海洋的最后的闭合的这份报纸，在东南的内部蒙古的序列和沉积环境与它的附近的区域的地质学结合了。研究显示出那在期间在Tianshan-HingganOrogenic系统的东方片断含碳二叠，有对大陆人沿岸浅海的巨大的ENE-NE-trending沉积的盆，通过东南的内部蒙古向东从Ejinqi在西方开始进吉林和Heilongjiang。分发更低在广阔区域含碳是稀少的。晚含碳或二叠的暴烈沉积的岩石unconformably总是躺泥盆纪以上单位。上面含碳中间二叠被沿岸浅海的存款统治并且上面二叠，由大陆人存款。晚含碳二叠没有subduction碰撞造山运动的踪迹，逐渐地暗示盆由缩小和shallowing消失了。另外，是笔记感兴趣Ondor和和Hegenshanophioliticm戠獩畣瑩Τ

简介：暴露得好的Lijiatuo节被选择探索州的、主要生产率和海水硫酸盐在寒武纪的系列1-2期间铺平的海洋的氧化还原作用的时间的进化和控制，华南。这节由Xiaoyanxi形成(Fm)mudstones和LiuchapoFm组成。在斜坡和盆环境扔了的燧石。五个oxic缺氧的周期基于V/Sc，Th/U和瞬间，U，V，Ni和Cu的丰富因素被识别。中间上面的LiuchapoFm。并且中间的XiaoyanxiFm。在oxic-suboxic条件下面被扔，并且阶层的其余部分在缺氧的条件下面。Re/Mo比率证明oxic-suboxic在中间的XiaoyanxiFm调节。被短暂sulfidic条件伴随，并且节的其余部分是underanoxic和non-sulfidic条件。所有TOC和Ba，Ni，Cu，Zn和Cd的丰富因素表明了那在LiuchapoFm下沉和有机物(OM)的埋葬流动。在overlyingXiaoyanxiFm是比那低的。在XiaoyanxiFm的最高的下沉和OM的埋葬流动。出现在它的更低的部分；然而，在XiaoyanxiFm的最低下沉和OM的埋葬流动。出现在它的中间的部分。TOC/TS，TS和34间谍证明海水被低海洋的硫酸盐层次统治，它当免费H2S。大气的氧内容的上升可以是为联系、短暂suboxic-oxic并且将近的主要司机在中间的XiaoyanxiFm的sulfidic环境。

简介：

简介：InordertoinvestigatetheevolutionofShiquanhe-Yongzhu-Jialiophioliticmélangebelt,thegabbrosfromnewdiscoveredZhongcangophioliticmélangearestudiedthroughpetrology,whole-rockgeochemistry,zirconU-PbdatingandLu-Hfisotope.Thegabbrosinvestigatedinthispapercontaincumulategabbroandgabbrodike,andtheyhaveundergonegreenschist-amphibolitefaciesmetamorphism.Thechondritenormalizedrareearthelement(REE)patternsofmostoftheserocksshowflattypeswithslightlylightREE(LREE)depletionandtheN-MORBnormalizedincompatibleelementsdiagramsindicatedepletioninhighfieldstrengthelements(HFSE)(Nb,Ta)andenrichmentinlargeionlithophileelements(LILE).Thesegabbroshaveislandarcandmid-oceanridgebasaltaffinities,suggestingthattheywereoriginatedinanoceanicbackarcbasin.WholerockgeochemistryandhighpositiveεNd(t)valuesshowthatthesegabbroswerederivedfrom~30%partialmeltingofaspinellherzolitemantle,whichwasenrichedbyinteractionwithslab-derivedfluidsandmeltsfromsediment.U-Pbanalysesofzirconsfromcumulategabbroyieldaweightedmeanageof114.3±1.4Ma.Basedonourdataandpreviousstudies,weproposethatanintra-oceanicsubductionsystemandbackarcbasinoperatedintheNeo-TethyOceanofcentralTibetduringMiddleJurassicandEarlyCretaceous,resemblingmodernactiveintra-oceanicsubductionsystemsinthewesternPacific.

简介：EarlyPaleozoicgranodioritehasbeenidentifiedonthenorthernmarginoftheNorthChinacratonintheeastsectionofthecentral-Asianorogenicbelt,whichwaspreviouslyknownasearlyIndosinianinage.ByusingtheLA-ICP-MSmethod,theobtainedzirconU-Pbageis445.62.7Ma,whichrepresentsthecrystallizationageofthegranodiorite.Thegranodioriteneartheeastofthelarge-sizedBilihegolddepositisofthetholeiiteserieswithlowpotassium.Itisquasi-aluminousI-typegranite,enrichedinsodium(Na2O/K2O=7.299.77)andmagnesium(Mg#=0.510.67).TheΣREEvalueisrelativelylow,obviousdifferentiationisshownbetweenLREEandHREEandwithinLREE,andtheEuanomalyislowandnegative(δEu=0.740.91).Intheprimitive-mantlenormalizedspiderdiagramsoftraceelements,thegranodioriteisrelativelyrichinLREEandLILE(Ba,Sr,Th),andstronglydepletedinHFSE(Nb,Ta,TiandP),whichshowsfeaturesofsubductionzonecomponents(SZC).InthediscriminationdiagramsoftectonicsettingsofgraniteforRbvs.(Nb+Y),Rbvs.(Ya+Ta),La/Nbvs.Ba/NbandTh/Nbvs.Ba/Nb,thegranodioriteexhibitstypicalfeaturesofislandarcgranite.ThenormalizedvaluesofKandRbareextremelylow,whilethevaluesofSrandEuareveryhigh,whicharesimilartothoseofislandarcmagmathathasundergonemetasomatismoffluidfromtheoceaniccrust.ThegranodioriteisrelativelydepletedinεHf(t)(5.17.1)andlowinεHf(t)modelages(1089921Ma).IntheεHf(t)vs.age(T)diagram,thedistributionareaofthegranodioriteisaccordantwiththefieldoftheXing'anling-Mongoliaorogenicbelt,whichindicatesthatthemagmaticsourcesaremainlythemixtureofpartialmeltingofwedgedmantlesubjectedtometasomatismoffluidfromtheoceaniccrustandyoungsubstancefromthecrust.ThegranodioriteissimilartothefelsicarcmagmaintheDamaoBanner,BateObon,BoinSumandOrdorSumregions,andtheyaltogetherconstituteanearlyPaleozoicaccretionaryislandarcma

简介：ObjectiveTwoimportantgeologicalissueshavelongbeencontroversialintheXing–MengareaofNorthChina.ThefirstconcernsthefinalclosureofPaleo-AsianOceaninXing–Mengarea,andtheotherconcernsthefoldingandliftingoftheXing-MengTrough.ThefocusofthsesissuesistheLatePermiansedimentaryenvironment,whichis