简介：在河口，人的活动的影响和河口规定基于推迟的沉积元素的分析混浊最大值地区上的工程根据在1959和2011之间的测量数据被学习。当在流量的沉积体积和集中的锋利的减少在河口导致了混浊最大值地区的锋利的减少时，人的活动在朝海的方向水上有小效果，这被发现当在流量的沉积体积和集中的锋利的减少在河口导致了混浊最大值地区的锋利的减少时。集中在外面，海和Hangzhou海湾没变化，并且那也有点沿着Subei海岸减少，它没在混浊最大值地区上有影响。与在1959和1999之间的集中相比，在河口在上游的移动的集中的山峰，和在20002009的集中沿着河与一个更狭窄的变化范围在大约24.73%减少了到海。在诺思经过的推迟的沉积集中是低的在因为朝海的方向沉积的减少在上游、下游、床材料变粗，当它由于沉积的影响在中间相对高时，穿过北方突堤。

简介：Miaowan()ophiolite是在Yangtzecraton的北边缘附近外面收割的高度割下的ophiolitic建筑群。这建筑群的岩石由组成，从底部到顶，局部地包含podiform铬铁矿的harzburgitetectonite，纯橄榄岩，分层、各向同性的斑粝岩，sheeted堤建筑群(SDC)，有燧石豆荚和层的元枕头熔岩，和构造地设置的大理石。SDC向下是Miaowanophiolitic顺序，和等级的很重要、重要的部分进斑粝岩和ultramafic岩石，并且进元枕头熔岩向上。一些堤保存单程的chilled边缘，典型地代表extensionalophiolitic背景而大多数保存两倍chilled边缘，在寒心的方向能的情况中决定了。SDC主要由元辉绿岩(粗玄岩)组成，元斑粝岩和ultramafic的meta-plagiogranite，和小数量摇。LA-ICP-MS锆石标明日期收益一上面拦截年龄1026?????????????????????慩睯湡??灯楨汯瑩??丠潥牰瑯牥穯楯??慵杮楬杮？

简介：在在中间之间的过渡时期并且晚三叠纪，印度支那造山运动在华南引起了二构造事件：(1)形成并且沿着华南板的北边缘Qinling-Dabieorogenic带高举，由于它有北方中国板的碰撞；并且2)在华南板的东南的部分的1300-km-wideintra大陆人orogen的发展，它导致了低岬戳褶层地区的一个向西北的运动。这些构造事件结果Yangtze站台的intheending，并且是从Eidacaran的一个稳定的paleogeographic因素到中间的目的三叠纪。这个平台被浅水的碳酸盐的普遍发展描绘。在Yangtze站台的结束以后，上面的Yangtze低岬盆(或四川低岬盆)被形成在期间晚三叠纪并且成为了由Xujiahe形成的相关阶层构成的河的存款的一个累积地点。在西方的四川省，Xujiahe形成躺形成浅水的碳酸盐Xiaotangzi形成siliciclastic岩石摇的Maantang(从架页岩到沿岸的外形)。sequence-stratigraphic框架上面在上面的Yangtze低岬盆三叠纪显示特别冲积体系结构，由创作的序列描绘了(1)高住所的阶段的低精力的河的存款的继任包括煤缝接，并且(2)低住所的阶段的高精力的河的存款，包括混合河隧道沙岩。属于Xujiahe形成和它的相对阶层的这些河的存款的空间分发被渐渐的变瘦外面描绘，重叠，并且向东方和南方的拧外面。这个沉积记录因此在低岬盆的充满的继任以内表示河的存款的特别sequence-stratigraphic继任。sequence-stratigraphic框架为上面在上面的Yangtze区域三叠纪提供Yangtze站台和上面的Yangtze低岬盆的形成的结束的一个记录。

简介：与潜在的涡度(PV)在这篇论文，潜在的涡度结构和在在212003年6月23日期间的长江和Huaihe河山谷上的风暴之发展形成的倒置被调查框架。风暴之发展形成被一个lower-troposphericPV异例主要由于潜伏的热版本在早阶段在长江和Huaihe河山谷上表明，它极大地影响由片表明了明智的PV倒置的联系lower-tropospheric重力势高度和风领域的进化。在以后的阶段，一个upper-troposphericPV异例发展，导致在在两个的气旋上的垅的生长在上游、下游，它为低级气旋发展提供一块有利背景地。但是表面热反常的效果总是在这风暴之发展形成期间阻碍气旋的发展到不同程度。位置和PV异例的力量是，这进一步被表明仔细，与低级气旋有关，开发，和lower-troposphericPV异例似乎例如，组成最重要的特征贡献大约60%到低级喷气(LLJ)。

简介：Withtheenhancedwarmingandacidificationofglobalocean,whetherandtowhatextentthenaturally-weatheredfluvialsedimentintotheseacanreleaseelementsandthusinfluencethegeochemicalprocessandecosystemofglobaloceanremaintoberesolved.Inthiscontribution,anexperimentalstudywascarriedouttoexaminethereleaseratesofmajorelements(Ca,K,MgandAl)fromthesurfacesedimentsintheChangjiang(YangtzeRiver)EstuaryunderthepHvaluesof4.0,6.0and7.0.Thetwostudiedsedimentsconsistprimarilyofquartz,plagioclase,calciteandclayminerals,withtheBET(Brunauer,EmmettandTeller)surfaceareasof61.7m2g-1and23.1m2g-1.MajorelementsofCa,K,MgandAlshowdifferentreleaseratesunderdifferentsolutionpHvalues.WiththedecreasingsolutionpH,thereleaseratesofCaandKincreaseobviously,whilethereleaseratesofMgandAlincreasewiththeinitialsolutionpHvaryingfrom6.0to7.0.Thedifferentreleaseratesoftheseelementsarecloselyrelatedtotheoriginalmineralcompositionofthesedimentsandthereactionkinetics.Basedontheexperimentalobservation,quartzandclaymineralsthathavelowdissolutionratesmaydominatethemajorelementreleasetotheaqueousphase.Thisstudyrevealsthattheenhancingoceanacidificationcouldcauseconsiderablereleaseofmajorelementsfromnaturalterrigenoussedimentsintotheambientmarineenvironment,whichhastobeconsideredcarefullyinthefuturestudyonglobalchange.更多还原

简介：SeismictomographyfromthePgwavedataalongthenon-longitudinalprofileintheThreeGorgesRegionispresentedinthispaper.Theseismictomographymethod,andtheacquisitionandanalysisofseismictraveltimearebroadlyoutlined.Thetomographyofbasementrevealsagreatamountofsignificantinformationandshowsthatthelow-velocityzoneisduetothelithologicdifferenceandthefaultfracturezone.Italsodemonstratesthatthereexistthreehigh-velocityzoneswithv>6.4km/satthebasement;thelargestofzoneswhichstrikesnorth-southislocatedatthesouthwesternsideofHuanglingAnticlinoriumandextendsintotheanticlinoriumnorthward.Theothertwohigh-velocityzonesare,respectively,situatedattheeasternsideoftheanticlinoriumandthewesternsideoftheprofile.Thehigh-velocityzonesareinferredtooriginatefromtheupwellingofmaterialwithhigh-velocityfromdeepcrust.

简介：ThereasonsfortheYangtzeRiverfloodcalamityin1998arebrieflyintroduced.Theauthorsbelievethatusinga'soilreservoir'conceptisanimportantmeanstohelpcontrolfloodingoftheYangtzeRiver.A'soilreservoir'hasalargepotentialstoragecapacityanditswatercanberapidly'discharged'intotheundergroundwaterinatimelyfashion.Theeroded,infertilesoilsoftheYangtzeRiverWatershedarecurrentlyanobstacletoefficientoperationofthe'soilreservoir'.Thestoragecapacityofthis'soilreservoir'hasbeenseverelyhamperedduetointensivesoilerosionandtheformationofsoilcrusts.Therefore,possiblemeasurestocontrolfloodsintheYangtzeRiverWatershedinclude:rehabilitatingthevegetationtopreservesoilandwaterontheerodedinfertilesoils,enhancinginfiltrationofthedifferentsoiltypes,andutilizingthelarge'soilreservoir'oftheupperreachesoftheYangtzeRiver.

简介：TheprecisecorrelationoftheOrdoviciansuccessionsindifferentfaciesisdifficultduetothecomplexchangesofthetecto-paleogeographyinSouthChina.Basedonpreviousstudies,theauthorsrecognized103rdgradesequences,i.e.,Osq1toOsq10inascendingorder,bytheintegratedstudyofchronostratigraphy,biostratigraphyaswellastheanalysisonthesedimentaryfacies.TheauthorsareconfidenttocorrelatetheOrdoviciansuccessionspreciselyindifferentfaciesinanisochronousstratigraphicframeworkwiththeapplicationofthemethodofsequencestratigraphyandcorrelation.

简介：ThereisabeltofmetamorphiccorecomplexesinthewesternmarginoftheYangtzecraton.ThegeologicalsettingofthebeltissimilartothatoftheCordilleranmetamorphiccorecomplexes.AtypicaloneinthisbeltistheJianglangmetamorphiccorecomplex,whichhasaconfigurationconsistingofthreelayers:acorecomplexconsistingofMesoproterozoicschistsequence,aductilemiddleslabconsistingofPaleozoicmeta-sedimentary-basaltcharacterizedbythedevelopmentof"foldinglayer"andanuppercoverconsistingofXikangGroupwhichhassufferedbothbucklingandflattening.AdetachmentfaultdevelopedalongthecontactboundarybetweenthecoverandbasementcausestheomissionofUpperSinianandCambrianatthebaseofcover.Alotofnormalductileshearzonesdevelopedinthecovercausesthethinningofit.Allthefeaturesshowthattheearlyextensionresultsinthethinningofcrust,buttheformationofthedomeandexposureofbasementrocksmaybetheresultsofsuperimp

简介：BeddedchertsoccurringintheEarlyPermianGufengFormationintheLowerYangtzeregion,easternChina,arenearly20-80minthicknessandcontainvaryingamountsofradiolariansandspongespicules.TherearethreetypesofsectionfortheGufengFormation:chert,carbonateandchert-carbonatemixingtypes.Beddedchertsmainlyoccurinthefirstandthirdtypesofsection.Thedepocentresofsilicaaremarkedbysomesmall(notlargerthanafewthousandsquarekilometresinarea)rhombicorelliptichollowsandtheirformationwascontrolledbyfaults.Argillaceousvolcanicrocksinchertsoccurasnumerousthinlayers.BeddedchertsarecharacterizedbyhigherFeandlowerAlcontents,enrichmentinsuchtraceelementsasAs,Sb,Bi,Ga,Au,AgandCr,lowertotalREEabundance,negativeCeanomalyandvaryingdegreesofHREEenrichment.Thesecharacteristicsareimportantevidenceforhydrothermalcherts.Minoramountsofsubstancesofnon-hydrothermaloriginaremixedinthecherts.Thetempera

简介：PCBspollutantsaremeasuredontidal-flatsedimentsofYangtzeestuarybyahighresolutioncapillarycolumngaschromatography(HP6890)equippedwithan63Nielectroncapturedetector(ECD).TheconcentrationtendencyofPCBsisPhragmiteszone＞Scirpuszone＞baremudflats.TherearelinearrelationsbetweenPCBsandTOCand＞63μmgrainsizepercentage(involume).Thelowchlorinatedcongenersmaybemoreimportantthanthehighchlorinatedcongenersinthisarea.PCBsprefertoaccumulateinthesedimentsnearsewageoutletsandPhragmiteszone.Thesediments′PCBspollution(10.7～28.6ng/g,dryweight)intheYangtzeestuarytidal-flatislessseriousthanthatofthemostofotherareasintheworld.Butthedetectedratiois100%,eventheJiuduanshashoalhasdetectedPCBs,somuchattentionshouldbepaidtothisareaforPCBs.

简介：FocusingontheYangtzeRivereconomiczone,thepreviousgeologicalresearchesaresystematicallysummarized,resourcesandenvironmentconditionsandmajorgeologicalproblemswhichareneedingtobeconcernedinlandplanningandconstructionarestudied.Theresultsshowthattheresourceconditionsofcultivatedland,shalegas,geotherm,lithiumandsoonaresuperiorintheYangtzeRivereconomiczone,andtheresourcesandenvironmentconditionsareconducivetodevelopthemodernagriculture,cleanenergyindustryandstrategicemergingindustries.3×1013m^2farmlandswithoutheavymetalpollutionareconcentrated;therearethreenationallevelshalegasexplorationanddevelopmentbaseswithexploredreservesof5.441×1011m^3;geothermalavailabilityis2.4×109tofstandardcoaleachyear,equivalentto19%oftheamountofcoalin2014;Asia'slargestenergylithiummetaloredepositisfound.InsomepartsofYangtzeRivereconomiczone,therearesomemajorgeologicalproblemssuchasactivefaults,karstcollapse,groundsubsidence,landslide-collapse-debrisflow,affectingtheriver-crossingchannels,high-speedrailway,urbanagglomerationandgreenecologicalcorridorplanningandconstruction.Thoseproblemsshouldbeconcerned,andtherelevantsuggestionsandcountermeasuresareputforward.Meanwhile,theideastofurthersupportthedevelopmentoftheYangtzeRivereconomiczoneareputforward.

简介：TheThreeGorgesProject(TGP)isaworldknownprojecttoutilizeandmanagethewaterresourcesoftheYangtzeRiver.Thereservoirstoreswaterattheendofthefloodseason,andreplenishesdownstreamreacheswithwaterindryseasons.Inadditiontosuchbenefits,theTGPhasirreversiblychangedthehydrologicalprocessandtheriver-lakerelationofthemiddleandlowerreaches.Inthispaper,ahydrodynamicmodelwasestablishedtoquantifytheimpactoftheTGP'soperationonthewaterexchangebetweenDongtingLakeandtheYangtzeRiverduring2009–2013.Theresultsindicatedthat:theoperationoftheTGPhasconsiderablyreducedthepeakdischargeandthefloodvolumeofthemainstreamandtheDongtingLakearea.TheinflowvolumefromtheYangtzeRivertoDongtingLakeviathreeoutletsdecreasedby1.9–3.5billionm3/yr,whiletheoutflowvolumefromDongtingLaketotheYangtzeRiveratChenglingjiincreasedby0.3–1.6billionm3inSeptemberand0.4–0.6billionm3inOctober,respectively.Thisresearchprovidesvaluableinformationforfloodcontrol,irrigation,andwaterallocationinthemiddleandlowerreachesoftheYangtzeRiver,andservesasatypicalcaseforinvestigatingtheimpactofotherhydropowerprojectsaroundtheworld.&2017InternationalResearchandTrainingCentreonErosionandSedimentation/theWorldAssociationforSedimentationandErosionResearch.PublishedbyElsevierB.V.Allrightsreserved.

简介：Thirteensedimentcoresamples(0-10cm)weretakenfromthesevenlakesinthemiddleandlowerreachesoftheYangtzeRivertodeterminethecontentsanddistributionsoforganicphosphorus(P)fractionsinthesedimentsoftheshallowlakesinthearea.TheorganicPfractionsinthesedimentswereintheorderofmoderatelylabileorganicP(MLOP)>moderatelyresistantorganicP(MROP)>highlyresistantorganicP(HROP)>labileorganicP(LOP),withaverageproportionalratiosof13.2:2.8:1.3:1.0.LOP,MLOP,andMROPweresignificantlyrelatedtothecontentsoftotalorganiccarbon(TOC),water-solubleP(WSP),algal-availableP(AAP),NaHCO3-extractableP(Olsen-P),totalP(TP),organicP(OP),andinorganicP(IP).However,HROPwassignificantlyrelatedtoOPandweaklycorrelatedwithTOC,WSP,AAP,Olsen-P,TPorIP.ThissuggestedthatorganicP,especiallyLOPandMLOPinsediments,deservedevengreaterattentionthanIPinregardstolakeeutrophication.IntermsoforganicP,sedimentsweremorehazardousthansoilsinlakeeutrophication.AlthoughOPconcentrationswerehigherinmoderatelypollutedsedimentthanthoseinheavilypollutedsediment,LOPandMLOPwerehigherintheheavilypollutedsediment,whichindicatedthatheavilypollutedsedimentwasmorehazardousthanmoderatelypollutedsedimentinlakeeutrophication.

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简介：<正>AfterstudyingsystematicallyPetrology,Mineralogy,Petrochemistry,REEgeochemistryandstrontium,sulphur,leadisotopeofthealkali-richgraniteprophyrydistribuledextensivelytheYangtzeplatfromwesternmargin’salkali-richgraniteporphyrywepointoutthatthealkali-richgraniteporphyryhavethepropertiesofnewintrusiveages,Rangeoftheisotopeageisform36Mato51Ma,theybelongtotheHimalayadate,Mainmineralcomponetsofthealkali-richgraniteporphyryconsistofk-fcldspar(35~45x),quartz(36x±)plagioclase(15x±)andbiotitc(10x±).Accessorymineralsoftherockbelongtotypeof

简介：溶解无机的滋养的元素从在2003年3月在Changjiang(长江)河口的南方经过收集的样品被分析，includingNH_4~+，NO_3~-，NO_2~--)并且PO_4~(3-)。水样品在三个车站在近表面、中间、近底部的深度时时与一个Niskin刺绣花样被收集—A1，A2和A3—在小潮和大潮的二个完全的潮汐的周期期间。结果显示出那1)当PO_4~(3-)显示出一个相反的趋势时，集中ofNH_4~+，NO_3~-和NO_2~-在大潮期间比那些在小潮期间分别地是高一些的，并且各比在涨潮在落潮是更高的，为小潮的任何一个潮汐的周期或春天潮汐的周期；2)营养素的更高的层化在这个区域显然存在与哪个从底部增加了到表面的集中，特别为NH_4~+和NO_3~-；3)所有溶解无机的营养素的变差系数(C.V)价值在潮流和Changjiang流量的不同影响以外从4.06%～36.8%变化了；4)与在水列增加浮游物，PO_4~(3-)的集中在过滤的水里变得更低；并且5)每个潮汐的周期的全部的运输是更，在大潮，比在小潮，和positive，价值显示营养素被出口了到华东海。研究在变化和在theChangjiang河口的南方经过的溶解无机的营养素的网运输将在华东海为红潮的机制的学习提供科学基础。

简介：Thispaperextendstheresourcedragstudiesbyempiricallyinvestigatinghowspatialfactorsaffecttheregionaleconomicgrowth.Usingspatialpaneleconometricmodels,thispaperestimatesthedraggingeffectofenergyresourcesoftheYangtzeRiverDeltametropolitanareas.WefindthatthegrowthdragofenergyintheYangtzeRiverDeltaisabout6%onaverage,whichmeansthatenergyconstraintsdecreasetheeconomicgrowthby6%annually,higherthanthenationallevelthathasbeenpreviouslymeasuredintheliterature.Thisresulthastakenintoaccounttheimpactofneighboringcities’economicdevelopment,soastoobtainamoreaccurateestimate.Basedonthesemeasurementresults,weproposesomepolicyrecommendations.

简介：在直径的10m的一个浮标被用来在垂直侧面记录当前的速度和方向在近海Changjiang(长江)河口的区域(与46.0m的平均的水深度)为一年。结果包括：(1)水流顺时针方向旋转并且没有清楚的季节的变化，当前的方向在垂直侧面是一致的。(2)水平当前的速度通常高，与发生在夏天的128.5cm/s和出现在离表面通常靠近的冬季的105.5cm/s的最大值。在在一样的垂直侧面秋天的平均当前的速度变化(差别是不到8.0cm/s)，与发生在夏天的47.0cm/s和在冬季的40.8cm/s的最大值。平均当前的速度在春天潮期间是两次那在小潮潮(26.5cm/s)期间。(3)速度的重要差别在垂直侧面被观察。最大的当前的速度发生在任何一个表面(春天和冬季)或表面下(夏天和秋天)，以出现在底部的最小的当前的速度。所有层的最大的平均当前的速度是57.9cm/s，它在夏天期间发生在18-m层。(4)剩余水流的平均速度从7.5cm/s到11.3cm/s，与在春天的最强壮的发生并且在冬季最弱。所有层的剩余水流在春天和冬季期间是东方的，而向东北或向北方在夏天和秋天期间。(5)水流在Changjiang河口近海被冲淡的Changjiang河分泌物，台湾温暖的水流，季风和潮一起影响。