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简介：TheJamesM.HarrisonAwardforOutstandingAchievementwasestablishedbytheIUGSExecutiveCommitteein2004tohonorindividualswhohaveservedtheUnioninanextraordinaryfashionforalongperiodoftime,andwhohavenorecognizedpositionasanofficeroftheUnion.TheawardisnamedforthelateJamesM.Harrison,aninternationallyknownanduniversallyrespectedCanadiangeologist(GeologicalSurveyofCanada)whowasoneofthefoundingfathersoftheIUGSanditsfirstPresident(1961-1964).

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简介：Thereisageneralconsensusthatmostophiolitesformedabovesubductionzones(Pearce,2003),particularlyduringforearcextensionatsubductioninitiation(Shervais,2001;Stern,2004;WhattamandStern,2011).'Supra-Subductionzone'(SSZ)ophiolitessuchasthewell-studiedTethyanophiolites,generallydisplayacharacteristicsequentialevolutionfrommid-oceanicridgebasalts(MORBs)toislandarctholeiities(IATs)orbonites(BONs)(Pearce,2003;DilekandFurnes,2009,2011),whichweregeneratedinsequencefromthedecompressionmeltingofasthenosphericmantleandpartialmeltingofsubduction-metasomatizeddepletedmantle(SternandBloomer,1992;DilekandFurnes,2009;WhattamandStern,2011).However,ophioliteswithMORBand/oroceanic-islandbasalt(OIB)affinitiesarerare,andtheiroriginandtectonicnaturearepoorlyunderstood(Boedoetal.,2013;Saccanietal.,2013).ItisinterestingthatthecompositionoftheseophiolitesfromthecentralTibetanPlateau(CTP)isdominatedbyMORBsandminorOIBsandadistinctlackofIATsandBONs,whichisinconsistentwithmostophiolitesworldwide(RobinsonandZhou,2008;Zhangetal.,2008).Butthegenerationandtectonicnatureoftheseophiolitesarestillcontroversial.*Inthisstudy,wepresentnewgeochronological,mineralogicalandSr-NdisotopicdatafortheChayongandXiewumaficcomplexesinthewesternGarzê-Litangsuturezone(GLS),atypicalPaleo-TethyansuturecrossingtheCTP(Fig.1).TheTriassicophioliteinthewesternGLShasbeendescribedbyLietal.(2009),whofoundthatitmainlyconsistsofgabbros,diabases,pillowbasaltsandafewmetamorphicperidotites.TheophiolitehasbeentectonicallydismemberedandcropsoutinTriassicclasticrocksandlimestonesastectonicblocks.TheChayongandXiewumaficcomplexesaregenerallyregardedasimportantfragmentsoftheTriassicophiolites(e.g.,Jin,2006;Lietal.,2009).ZirconLA-ICP-MSU-Pbagesof234±3Maand236±2MacanbeinterpretedasformationtimesoftheChayongandXiewumaficcomplexes,respectively.Thebasalts

简介：TheHuashixiaareaintheMadoiCounty,QinghaiProvince,westernChinaisoneofthemostimportantareasforthestudiesoftheformationandevolutionoftheA’nyemaqenmélangezoneduetothewellexposed,relativelycompletetectonostratigraphicsuccessions.However,thetimingandevolutionaryprocessoftheA’nyemaqenpaleo-oceanhaslongbeenpoorlyunderstood.Recently,weobtainedabundantradiolariansfromthesiliceousrocksoftheMaerzhengFormationofthismélangezoneinHuashixia.Total19speciesin10radiolariangenerahavebeenidentified.TheybelongmainlytotheAlbaillellaria,Spumellaria,Entactinaria,andLatentifistularia.Fourradiolarianassemblagezonesareestablished,including:thePseudoalbaillellarhombothoracata,Pseudoalbaillellascalprata,Ruzhencevispongusuralicus,andFollicucullusbipartitus-Follicucullussp.cf.F.ventricosuszones.RadiolarianfaunalcorrelationssuggestalateArtinskian–earlyKungurianageandlateCapitanian–earlyWuchiapingianageforthefirsttwozonesfromthelowerpartandthelasttwozonesfromtheupperpartsoftheMaerzhengFormation,respectively.AllradiolariansaretypicalofdeepwaterelementslivingindeepoceansinlowlatitudesduringthePermian.Previously,theradiolariansofEarlyCarboniferoustoEarlyPermianageandfusulinidsofEarly–MiddlePermianagehavealsobeenreportedfromtheA’nyemaqenmélangesuccessions.ThecombinationofthenewlyfoundradiolarianswiththepreviouslyreportedfaunalandmicrofloralassemblagesaswellasradiometricagesobtainedfromthesamestratigraphicunitsindicatesthattheA’nyemaqenpaleo-oceanmayhaveopenedinitiallyduringtheEarlyCarboniferous,expandedfromtheEarly–MiddlePermian,reacheditsacmeintheearlyLatePermian,shrunkduringthelatestPermiantoEarlyTriassic,andeventuallywasclosedintheMiddleTriassic.

简介：大别造山带和合肥盆地是紧密相连的两个构造单元，它们在形成和时空演化上具有密切的关系。在大别造山带内发现的可燃天然气和发生燃烧的隧道具有明显的区域性，集中分布于磨子潭-晓天断裂以南的北大别杂岩带和信阳-舒城断裂附近的早石炭世变质石英片岩中，磨子潭-晓天断裂和信阳-舒城断裂是连通深部的气源通道断裂；推覆体之下的寒武系凤台组和北淮阳型石炭系两套海相烃源岩是隧道可燃天然气的主力气源岩，其中下寒武统凤台组烃源岩具有高碳、高“R0”、高Tmax低氯仿“A”的特点，已进入热演化的过成熟阶段；北淮阳型石炭系烃源岩有机质丰度高，以Ⅲ型干酪根为主，热演化程度很高，大量的油气已经生成，最重要的是研究其成烃过程与圈闭配套史的关系。大别造山带隧道可燃天然气的发现展示了合肥盆地区深部海相层系良好的勘探前景，因此下步勘探重心应从“中新生代盆地系统”转移到“深部海相层系”，以寻找“古生古储”或“古生新储”类型油气藏为主。

简介：<正>Theworldpetroleumexplorationsuggeststhat,about70%oftheworld’spotashresourceswerediscoveredduringoilandgasexploration(Zhengetal.,2007).TheKuqadepressionintheTarimbasinisabundantwithpetroleumexplorationdata,and

简介：OurfieldworkandgeochronologicstudiesinnorthernHebeiandwesternLiaoningareasindicatethatthemajorMesozoiccontractionaleventsintheYanshanbeltareof(1)pre-MiddleJurassic(Indosinian?),(2)LateJurassicand(3)EarlyCretaceousage.ThefirstN-SshorteningcouldbeaconsequenceofthecollisionoftheMongolianarcsalongtheSolonsutureagainsttheNorthChinaplate.Siberian-NorthChinaplatecolli-

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简介：在这份报纸，我们集中于在广告1556M~8.5Huaxian地震的震央的区域开发的山崩的特征，并且在SEWeiheGraben讨论他们的关系到活跃正常差错，华中。在有地调查的联合，从分析高分辨率的遥远察觉到的形象和数字举起模型(DEM)的结果表明那：山崩从小规模的碎片/岩石下降在学习区域范围观察了到大规模岩石雪崩的(i)；(ii)山崩主要在30的陡峭的斜坡之上被开发?????????‰???ㄠ吗？？

简介：OnOctober18,2018,theChinaGeologicalSurveylaunchedaprojectoftheNationalKeyResearchandDevelopmentProgramofChina,entitled"PredictionandDeepExplorationDemonstrationofGoldPolymetallicDepositsintheJiaodongandLiaodongAreaswithintheNorthChinaCraton".Forthisproject,WulongandBaiyun-XiaotongjiapuyiinJiaodong,aswellasthenorthernZhaopingbeltsofLiaodong,werechosenasoreprospectingdemonstrationareas(Fig.1).

简介：<正>1IntroductionVirusesarethemostabundantbiologicalentitiesonEarth.Theycaninfluencethesuccessionofindividualmicrobialpopulations,biogeochemicalcyclesofC/Nand,ultimately,microbialcommunitystructurethroughkilling

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：<正>1IntroductionTheundergroundbrineresourcesdistributingwidelyinSichuanBasin,Chinahavedrawnworldwideattentionduetotheirunusualelementabundanceandexcellentquality.

简介：从区域背景出发，根据重矿物分析、砂岩厚度和砂岩百分含量确定沉积物源方向为NNE向．综合利用岩心、测井、粒度分析、沉积构造等资料，对白豹油田三叠系延长组长3、长4＋5沉积微相进行系统研究．结果表明，长3、长4＋5为三角洲前缘沉积，主要发育水下分流河道、河口坝、远砂坝、支流间湾4个微相．在地层划分与对比基础上，根据泥岩颜色、沉积旋回、测井相分析与砂岩厚度、砂岩百分含量，确定沉积微相平面展布特征，并总结出研究区相层序和相模式，为储层特征研究、油田开发提供地质依据．

简介：针对西南岩溶地区水文地质构造及富水性特征,利用EH-4电磁测深剖面的电阻率差异确定在缺水区域的井孔位置;并对典型案例进行介绍;最后对在工作过程中的经验认识进行总结概括,希望对今后类似地区进行找水起到一定的指导作用。

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