简介：<正>1IntroductionTheundergroundbrineresourcesdistributingwidelyinSichuanBasin,Chinahavedrawnworldwideattentionduetotheirunusualelementabundanceandexcellentquality.

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简介：Suoerkuduke()Cu(瞬间)沉积物，在有Xilekuduke的一样的metallogenic带()Cu瞬间沉积物，位于Armantai()东方Junggar的北边缘上的岛弧带，西北中国。七个辉钼矿的同位素的分析从存款取样的金来和锇被用来决定矿化作用的年龄。317.7的七点的isochron年龄

简介：铂组元素(PGE)的集中从Zhireken，Shakhtama和Aksug斑岩Cu瞬间存款在主要magmatic磁铁矿样品被分析了(西伯利亚，俄国)由激光，决定PGE的范围的脱离诱导地联合的血浆团spectrometry在磁铁矿并且到支票满足从二间主要岩石套房(贫瘠Pluto的套房和使矿物化的斑岩套房)的磁铁矿是否有不同PGE作文。这里介绍的结果显示磁铁矿在PGE被充实相对整个岩石。矿石相关的斑岩和贫瘠Pluto的套房的比较证明磁铁矿在两间套房展出相对类似的PGE分发模式。在Rh和Ru内容的变化被氧易逃逸在岩浆结晶化期间控制。

简介：Byusingthe40Ar-39ArchronologicalmethodtodateK-feldsparfromK-feldspargraniteintheQiaohuotecopperdistrict,theauthorsobtainedaplateauageof274.78±0.44Maandanisochronageof272.7±3.0Ma.BecausethereisnotectonicdeformationoverprintedorhydrothermalalterationintheK-feldspargraniteintrusionafteritsemplacement,the40Ar-39AragerepresentsthecrystallizationageofK-feldsparinK-feldspargranite,i.e.thelatecrystallizationageoftheK-feldspargraniteintrusion,whichindicatesthattheK-feldspargraniteformedintheintraplateextensionalstageduringtheEarlyPermian.Moreover,basedonthespatialrelationshipbetweentheK-feldspargraniteintrusionandcopperorebodies,variationsofcopperoregrade,REEcharacteristicsofK-feldspargraniteandcopperores,andHandOisotopiccompositionsoffluidinclusionsincopperores,themetallogenesisoftheQiaohuotecopperdepositisdirectlyrelatedtointrusiveactivitiesoftheK-feldspargranite,andthusthecrystallizationageofK-feldsparinthegraniteapproximatelyapproachesthemetallogenicepochoftheQiaohuotecopperdeposit.

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简介：Thevolcano-sedimentarysuccessionaroundWadiZaghrainSinai,atthenorthernmostsegmentoftheArabianNubianShield,comprisesvolcanicrocksinterbeddedwithratherimmaturesediments.Thesuccessionisdominatedbyintermediatetosilicicvolcanicsofmedium-tohigh-Kcalc-alkalineaffinity.Itisdividedintotwounits,thelowerunitincludesintermediaterocksanddacitesinterbeddedwithgraywackes,semi-pelitesandpelitesandtoppedbypolymictconglomerates.Thisunitissubjectedtofoldingandregionalmetamorphism(uptogarnetzone)andisintrudedbyquartzdiorite-granodioriteinducing,locally,low-pressurecontactthermalmetamorphism.Theunmetamorphosedupperunitencompassesacidvolcanicsintercalatedwithlitharenite,sublithareniteandminorarenite.Therhyolitesofthisunitpertaintothehighlyfractionatedgranitesandarecharacterizedbyanagpaiticindex(NK/A)rangingfrom0.87to0.96.Theymayreflecteitherextensiveinteractionofsubduction-relatedmagmaswiththecontinentalcrustorachangeinthetectonicregime.Thepresentlithologicalandgeochemicalcharacteristicsofthestudiedsedimentstogetherwithavailablezirconagesindicateratherdistalprovenanceoftheirdetritus.Thisdetrituscomprisesfluvial-alluvialsedimentsaccumulatedintheintermontanebasins,whicharehalf-grabensortiltedfaultblocks.Thetectonicsettingofthedepositionalbasinsisactivecontinentalmarginandcontinentalislandarcs.GeochemicalpatternsoftheZaghravolcano-sedimentarysuccessionindicatetheircorrelationwiththeDokhanVolcanics-HammamatClasticssequenceoftheEasternDesertofEgypt.Also,theZaghravolcanicsdisplaygeochemicalsimilaritieswiththoseexposedinSinai,attheRutig,FeraniandIqnaShar’aareas.TheZaghrasuccessionisdatedasEdiacaranbutisnotrelatedeithertotheensimaticislandarcassemblageortotherift-relatedassemblageformedduringtheearlystagesofthebreak-upofRodiniaaspreviouslythought.

简介：最新发现的Zhunuo斑岩Cu-Mo-Au存款在南部的西藏位于Gangdese斑岩铜带的西方的部分，SW中国。在Zhunuo区域的granitoidplutons由石英闪长岩斑岩，闪长岩斑岩，granodiorite斑岩，黑云母monzogranite和石英斑岩组成。石英闪长岩斑岩产出51.9愠摮戠潩敭楤慣?灡汰捩瑡潩獮戠'坍剶茶?湥'L敬?敲潣湧瑩潩?景愠瑣癩?湡?湩捡楴敶猠敷瑡瀠牯獥漠?畣癲摥猠楫??晲捡獥眠敨敲爠杩摩漠?慰数?祴数猠敷瑡瀠牯?敳獮牯?的锆石U-Pb年龄牡?湩晥敦瑣癩e

简介：AccordingtoVeningMeinesz-Moritz(VMM)globalinverseisostaticproblem,eithertheMohodensitycontrast(crust-mantledensitycontrast)ortheMohogeometrycanbeestimatedbysolvinganon-linearFredholmintegralequationofthefirstkind.HeresolutionstothetwoMohoparametersarepresentedbycombiningtheglobalgeopotentialmodel(GOCO-03S),topography(DTM2006)andaseismiccrustmodel,thelatterbeingtherecentdigitalglobalcrustalmodel(CRUST1.0)witharesolutionof1o×1o.ThenumericalresultsshowthattheestimatedMohodensitycontrastvariesfrom21to637kg/m3,withaglobalaverageof321kg/m3,andtheestimatedMohodepthvariesfrom6to86kmwithaglobalaverageof24km.ComparingtheMohodensitycontrastsestimatedusingourleastsquaresmethodandthosederivedbytheCRUST1.0,CRUST2.0,andPREMmodelsshowsthatourestimateagreesfairlywellwithCRUST1.0modelandratherpoorwithothermodels.TheestimatedMohodepthsbyourleast-squaresmethodandtheCRUST1.0modelagreeto4.8kminRMSandwiththeGEMMA1.0basedmodelto6.3km.

简介：CryogenianDatangpo形成在在Sturtian和Marinoan冰川期之间的间冰期的时间期间被扔。我们在东北贵州从基础Datangpo形成学习了氮同位素作文和黑页岩的瞬间的内容，华南，海洋的氧化还原作用变化和氮在间冰期的时间期间骑车一次尝试重建。象geochemical侧面一样基于岩石层位学，基础黑页岩能被划分成四间隔：间隔1有最低15N价值(+5.0)；在间隔2，15N价值在+6.4和+7.4(第一座山峰)之间变化；15在+6附近的N；并且间隔4被它的更高的15N价值，在+6.7和+7.8(第二座山峰)之间。瞬间的丰富因素的价值与上升stratigraphic趋势从56.8～2.6减少。它在Sturtian冻结成冰以后立即显示了那，在在到Yangtze站台的南部的边缘的斜坡的架之间的过渡地区上面的海洋的海水被成层，与浅海水是oxic，但是深水beingsulfidic。随后，尽管有一个oxic条件的短出现，高denitrification率在表面海水在扩展suboxic区域占优势，并且深海水仍然是缺氧或平的euxinic。

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简介：KarstrocksfromtheHuanglongFormationexposedatthemarginoftheEasternSichuanBasincanbedividedintofourtypes:slightlycorroded,moderatelycorrodedporous,intenselycorrodedbrecciatedandintenselycorrodedandreplacedsecondarycalcickarsticrocks.Thecarbon,oxygenandstrontiumisotopecompositionsofthevariouskarstrocksareanalyzedsystematicallyandcomparedtorockswithoutkarstcorrosion.Theresultsindicatethat(1)theHuanglongFormationintheeasternSichuanBasinwasarestrictedbaysuppliedandcontrolledbyfreshwaterinwhichmudmicriteandmud-dolomicriteexhibitlowδ13Candδ18Ovaluesandhigh87Sr/86Srratios;(2)alltypesofkarsticrocksinthepaleokarstreservoirsoftheHuanglongFormationintheresearchareaareaffectedbyatmosphericfreshwaterwiththeδ13Candδ18Ovaluesand87Sr/86Srratiosintheoriginalformationapproachingthoseofatmosphericfreshwater,whichreflectsancienthydrologicalconditions,fluidproperties,isotopicsourceandthefractionationeffect;(3)theintenselycorrodedandreplacedsecondarylimestoneisaffectedbyavarietyofdiageneticfluids,oftenreflectedbyδ13Candδ18Ovalues,whilethe87Sr/86Srratiosexhibitthestrongdegreeofthecorrosion;(4)aftercomparingthe87Sr/86Srratiosofeachtypeofkarstrock,thediageneticfluidsaredeterminedtobemainlyatmosphericfreshwater,anddependingonthestrengthofcorrosion,andthelow87Sr/86Srratiofluidsinthelayerwillparticipateinthekarstprocess.Thecarbon,oxygen,andstrontiumisotopesofdifferentkarsticreservoirscanprovidemeaningfulgeochemicalinformationforforecastingandevaluatingthedevelopmentanddistributionrulesoftheHuanglongFormationatthemarginoftheeasternSichuanBasinintimeandspace.更多还原

简介：Themulti-stageintrusionsofintermediate-acidmagmaoccurintheBangpuminingdistrict,thepetrogenicagesofwhichhavebeenidentified.Thetimesandsequencesoftheiremplacementhavebeencollatedandstipulatedindetailinthispaperbyusingthelaserablation-inductivelycoupledplasma-massspectrometry(LA-ICP-MS)zirconU-Pbdatingmethod.Theagesofbiotitemonzogranitethatwereformedbeforemineralizationinthesouthwestofthisminingdistrictare70±1Ma(meansquareofweighteddeviates(MSWD)=9.5,n=8)and60.60±0.31Ma(MSWD=3.8,n=16),whichbelongtothelateCretaceous-earlyPaleoceneinage.Thatmeans,theyareproductsofanearlytectonicmagmaticeventofthecollisionbetweentheIndianandAsiancontinentals.Theagesofore-bearingmonzograniteporphyryandore-bearingdioriteporphyriteare16.23±0.19Ma(MSWD=2.0,n=26)and15.16±0.09Ma(MSWD=3.9,n=5)separately,whichbelongtothemiddleMioceneinage;namely,theyareproductsoftheGangdesepost-collisionextensionalstagewhencrust-mantlematerialsmeltedandmixedaswellasmagmaticintrusionsimultaneouslyoccurred.Somezirconswithagesof203.6±2.2Ma(MSWD=1.18,n=7)werecapturedintheore-bearingdioriteporphyrite,whichshowsthattherehadbeentectono-magmaticeventsinthelateTriassic-earlyJurassic.Molybdenum(copper)ore-bodiesproducedinthemonzograniteporphyryandcopper(molybdenum)ore-bodiesproducedinthedioriteporphyritearethemainoretypesinthisoredeposit.ThemodelagesofRe-Osisotopicdatingforthe11molybdeniteare13.97-15.84Ma,whileisochronagesare14.09±0.49Ma(MSWD=26).Theisochronagesofsevenmolybdenitefrommolybdenum(copper)orewithmonzograniteporphyrytypeare14.11±0.31Ma(MSWD=5.2).Thereisgreaterrorintheisochronagesoffourmolybdenitefromcopper(molybdenum)orewithdioriteporphyritetype,andtheirweightedaveragemodelagesof14.6±1.2Ma(MSWD=41),whichgenerallyrepresentthemineralizationage.TheresultsabouttheR

简介：欧洲建成32家世界地质公园,中国建成20家世界地质公园,地质公园建设已经成为世界关注的热点。第1届世界地质公园大会在北京召开,第2届世界地质公园大会在英国北爱尔兰的贝尔法斯特召开,第3届世界地质公园大会于2008年6月22～26日在德国的奥斯纳布吕克市召开。

简介：由露头，日志和核心数据识别古老的河的词法类型是容易的。然而，隧道的水平分发和几何学能被依靠3-D仅仅鉴别并且预言地震数据。特别，地震地平线切的3-D能在蜿蜒地流的河，支流隧道和低蜿蜒的隧道的沙岩预言起一个重要作用。每个微外形单位包括主要隧道，例如蜿蜒或分叉的隧道，早朝，裂缝隧道，叶舌裂缝展开，泛滥平原等等能被识别。编织隧道沙岩是平面平坦侧面连接沙身体和厚主要隧道带的分发能仅仅从3-D被识别地震数据。因为编织沙岩是无所不在的，他们的出现和分发不需要被预言。通常，煤速度是那么低的它能在煤阶层创造强壮的振幅思考。它因而隐藏振幅作答到吻合能从3-D被识别的隧道沙岩地震倒置数据有时。充满泥的低蜿蜒的河的案例研究与3-D识别了地震数据显示如此的沙身体的规模和width-to-thickness比率是小的，旁边地不连接，并且通常在干燥气候条件下面发生在一把冲积扇子的远或进一步的部分上。有时，沿着地平线的每个思考事件的地震属性的抽取被期望最大化古老的隧道的空间进化的表示。

简介：The2ndMid-EuropeanClayConference(MECC'04)washeldbetween20-24thSeptember2004,inMiskolc,Hungary.Theideatoholdcommonconferenceswasacceptedbythenationalclaygroupsoffourneighbouringcountries,Poland,Slovakia,HungaryandCroatia,duringtheEUROCLAYMeetinginCracow,Poland,in1999.Thefirstconferencewasheldin2001atStaráLesná,intheHighTatraMts.inSlovakia.

简介：本刊讯（李亚楠）河北省张家口市国土资源局积极组织申报下花园矿山地质环境治理项目,获得国务院审批。日前,该项目3亿元专项治理资金,已到位1亿元,近期即可开工建设。近年来,为加快我国重点区域矿山地质环境治理,财政部、国土资源部计划用3年时间,重点支持资源枯竭城市的矿山地质环境治理。