简介：Naturalgashydrates(NGH)isoneofkeyfuturecleanenergyresources.Itsindustrializeddevelopmentwillhelpremitthehugedemandofglobalnaturalgas,relievetheincreasingpressureoftheenvironment,andplayavitalroleinthegreensustainablegrowthofhumansocieties.Basedonnearlytwodecades'studyingonthereservoircharacteristicsintheSouthChinaSea(SCS)andtheknowledgeofreservoirsystem,theChinaGeologicalSurvey(CGS)conductedthefirstproductiontestonanoptimaltargetselectedinShenhuareaSCSin2017.Guidedbythe"three-phasecontrol"exploitationtheorywhichfocusedonformationstabilization,technologiessuchasformationfluidextraction,welldrillingandcompleting,reservoirstimulating,sandcontrolling,environmentalmonitoring,monitoringandpreventingofsecondaryformationofhydrateswereapplied.Thetestlastedfor60daysfromMay10^thwhenstartingtopump,droppressureandignitetowellkillingonJuly9^th,withgasproductionof3.09×10^5m^3intotal,whichisaworldrecordwiththelongestcontinuousdurationofgasproductionandmaximalgasyield.ThissuccessfultestbringsasignificantbreakthroughonsafetycontrolofNGHproduction.

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

简介：TherelationbetweenearthquakesandactivefaultsinShanghaianditsadjacentoffshoreregionisquantitativelyevaluatedusingGIS-basedbufferandoverlayanalysistechniques.Statisticsonthedistancefromtheepicenterofanearthquaketoitsnearestactivefaultsuggestthatmostearthquakesinthestudyareaoccurredwithin10to20kmofmajoractivefaults.Thestrikesofactivefaultshavesignificantinfluencesontheoccurrenceofearthquakes.TheNE-NNE-strikedfaultsarelessactivethanNW-NNW-orEW-strikedfaults.AlongtheNW-NNW-orEW-strikedfaults,thefrequencyofearthquakesismuchhigherthanthatalongNE-NNE-strikedfaults.Thetimeoffaultactivityhassomedegreeofinfluenceontheearthquakes.Thenewerthefaults,thehigherthefrequencyofearthquakeswithinthezoneofthefaults.

简介：从一个锰小瘤的层从菲律宾的海挖出(16°56′N，129°48′E；水深度，5700m)并且45个体积小瘤从近海Minami-Torishima岛，日本(23°3′N，153°22′E；水深度，1200m)化学上被分析，他们的起源基于geochemical限制被讨论。一般来说，，Cu，Ni，Zn和瞬间趋于与增加Mn内容增加元素(REE)少些显示出的公司，Pb，Ba，V，Sc，Th，和稀土元素有增加Mn内容的变化。来自菲律宾的海的小瘤42H有平均Mn/Fe比率结束到1并且显示出一个积极Ce异例，建议占优势的氢的起源。230Th前和230Th前/232在小瘤42H的外部∼0.3公里的Th比率显示∼1.7mm/Myr的稳定的生长率。小瘤E30从近海Minami-Torishima被更低的Mn，Fe，Mn/Fe(0.53)和Mo/V(0.2)比率描绘但是更高的P和Cu/Ni(0.31)相对来自那个区域的另外的小瘤的比率。E30的Ce内容是不平常地低的(82ppm)什么时候与来自区域和它的另外的小瘤相比是唯一的小瘤，与一个否定Ce异例(−0.64)分析了。把那个大多数基于我们建议的geochemical数据小瘤从近海除了E30，Minami-Torishima主要具有氢的起源，它被热水的输入，和E45统治，它关于35%热水的贡献有。