简介：LocatedinXilinGolLeagueofInnerMongoliaAutonomousRegion,theXilinhot-AbagavolcanicclusterisinthecentreoftheDaxing’anling-Datongvolcaniceruptionbelt.Morethan300Quaternarybasalticvolcanoesofdifferenttypesaredevelopedinthevolcaniceruptionbelt.Maarsarefoundforthefirsttimeinthestudyarea,withthoseinHaotewulainthesoutheastofAbagaqi,andChelewulaandEsigewulainthenorthwestofAbagaqitobethemostrepresentative.Theyallarelargeinscale,withconediametersgenerally3~4km,withthelargestupto6.5km.Themaarsshowintactstructure,asimilartwo-ringedmountainlandscapeandobviouslyphasederuptionwhichcontainedavigorousphreatomagmaticexplosionattheearlierstage,andweakmagmaticexplosionatthelaterstage,andbasalticlavaeffusioninthelaststage.Theeruptionsequencereflectstheinteractionbetweenmagmaandwater,thechangeofintrusivespeedandoutflowrateofmagma.TheMiddlePleistocenedepositsofsandandgravelinthevalleyarecoveredbybasalsurgedeposits.TheTLageofsandstone-shale"xenolith"whichwasfoundinthespatterdepositsclosetothecrateris(0.112±0.0096)Ma,indicatingthattheeruptiontimeoftheMaarswastheearlyLatePleistocene.

简介：Recently,wecarriedouttheNationalNatureScienceFoundationofChina(No.41273033)andSpecialFundforBasicScientificResearchofCentralColleges(No.310827153407)andmadesomeadvancesasfollows.ThemainresearchachievementsofthePaleozoicvolcanicrocksinnorthwestChinaincludetwoaspects:

简介：TheCarboniferousandPre-CarboniferousformationsinLudong,Zhungarbasin,containfavorableoil/gasreservoirs.TheCarboniferousformations,however,arecomplexinstructureandexhibitlateralvariationsinlithology.SeismicreflectionsfromPre-Triassicformationsarepoorandthevolcanicreservoirsareverydifficulttoidentify.Theanalysisofphysicalpropertiesconcludedthatthemajortargetsinthisregion,i.e.,thetopoftheJurassicandCarboniferousformations,providedistinctdensityinterfaces.Thebasic,intermediateandacidvolcanicrockswerealsodifferentindensity,resultingindistinguishablegravityanomalies.Thedifferencesinmagnetisminthisregionexistednotonlybetweenthevolcanicrocksandclasticsedimentaryrocksbutalsoamongvolcanicrockswithdifferentcompositions.Allformationsandvolcanicrocksofdifferentlithologiespresentedhighandlowresistanceinterbeds,whicharecharacterizedbyregionaltrends.Themodelingstudydemonstratedthatnon-seismicintegratedgeophysicaltechniquesshouldbefeasibleinthisregion,especiaUythehigh-precisiongravity/magneticmethodscombinedwithlongoffsettransientelectromagneticsounding.

简介：AnintegratedstudyofzirconU-Pbgeochronologyandpetrochemistry,togetherwithzirconLu-Hfisotopes,hasbeencarriedoutonthebasaltic-andesitictuffandvolcanicbrecciafromtheNamHangFormationandandesitictufffromtheMuang-NanFormationintheXaignabouliarea,whichhadbeenmappedasthePermian–EarlyTriassiconthe1:1000000geologicalmaporLateCarboniferousonthe1:200000geologicalmaps.ZirconU-Pbdatingofthreesamplesyieldedweightedmeanagesof235±2.6,232±1.4and278±2.8Ma,respectively,suggestingaLateTriassicoriginfortheNamHangFormationandanEarlyPermianoriginfortheMuang-NanFormation.Geochemically,theyarecharacterizedbydepletionsinHFSEs(e.g.,Nb,Ta,Ti)andhighLILE/HFSEratios,andtheyhavepositivezirconεHf(t)valuesof8.7–15.9,whichexhibitsthecontinentalarcvolcanicaffinityandpartialmeltingofsubductingoceanicslabinthemagmasource.Combinedwithspatialoccurrenceofthevolcanicrockandexistinggeochronologicalandgeochemicaldata,wesuggestthattheXaignabouli-LuangPrabangvolcanicbeltcanbelinkedtotheLoei-Phetchabunbelt.ThePermian–TriassicvolcanicrocksinthisbeltmightbeaproductoftheNanback-arcbasineastwardsubduction.

简介：TakingmemberoneofYingchengFormationofCretaceousinXudongarea,XushenGasFieldofSongliaoBasinforanexampleandaimedatthediachronousproblemgenerallyexistedinvolcanicreservoirdivision,firstlyadvancedthemethodoftwostepsandtwounitesintheresearchesofvolcanicreservoirfinelydivisionthatguidedbythemethodthatsourcescontrolledandfoundedthestratigraphictrellis.Inthisprocess,volcanicedificesandbodieswereidentifiedandtraced.TheresultsindicatedthataimedstratainstudyareascouldbecarveduptosixlayersofYC1I1,YC1I2,YC1I-II,YC1II1,YC1II2andYC1IIIfromthetoptothebottom.Analyzingcausesandfirmlyunitedofwelldataandseismicdatacouldachievefinestratigraphicdivisionofvolcanicreservoir.Surfacesoflayersandvolcanicbodieswerebasicallyunanimousinsidedirection.Stratuminclinationgraduallyreducedwiththedistancesincreasedfromcraters.Theresultsofvolcanicreservoirdivisionhadpreferableconsistencywithlithologiesandvolcaniclithofaciesanddynamicdevelopmentdata.Theresearchesofferedausefulmethodtostratigraphicdivisionofvolcanicreservoirandithadveryimportantsignificancetoeffectivedevelopmentofvolcanicreservoirinpractice.

简介：InaccordancewiththeAgreementofSino-SpainScienceandTechnologyCooperation,theInstituteofSeismology,SSBofChinaandtheInstituteofAstronomyandGeodesyofSpainhavetogetherperformedresearchattheGeodynamicsLaboratoryofLanzarote(CanaryIslands)withgeodynamicinstrumentation.Researchersconductedobservationandthenanalyzedthedatacompiled.Researchersusingtheadvancedgeodynamicinstrumentscouldmonitorthevolcanicactivityandseismicityinordertoforecastthevolcaniceruptionandearthquakes.TheresultsofthispaperareobtainedfromthisscientificandtechnologicalcooperationofthetwoinstitutesbetweenChinaandSpain.

简介：Basedonthermalsimulationexperiment,interactionsbetweenvolcanicfluidsandsourcerockswerestudied.Gasgenerationsinthedrysystemandfluidsystemunderdifferenttemperatureswereanalyzed.Theresultsshowedthatthevarioustypesofsourcerocksaresimilarincomposition,containinggaseousC1-C5hydrocarbons,H2andCO2whosegasyieldsincreasewithincreasingtemperature.ThegasyieldofsourcerocksoftypeisⅠthehighest,followedbytypeⅡ,andthatofsourcerocksoftypeisⅢthelowest,indicatingthattheyieldofhydrocarbongasesisrelatedtotheirhydrocarbongeneratingpotential.AlthoughthegeneratingpotentialoftypeisⅢthelowest,itcanstillberegardedasausefulgassourcewhenitisburieddeeplyenough.Thebasicvolcanicfluidrestrainsthegenerationofgaseoushydrocarbonsindifferenttypesofsourcerocks,butpromotesthegenerationofinorganicgases.

简介：600年的集成与Bergen气候模型和公民一起执行了的A为环境预言/公民中心集中因为大气的研究(NCEP/NCAR)分析数据被用来在东方亚洲夏天季风(EASM)和EASM降雨上调查强壮的热带暴烈的爆发的影响。模拟和NCEP/NCAR分析数据显示出一在强壮的爆发年里变弱EASM。模型模拟建议诺思和华南经历干旱，Yangtze-Huaihe河山谷在爆发年期间经历洪水。响应强壮的热带暴烈的爆发，在上面的对流层的南方的空气温度坡度被提高，它导致向南方的移动和东方亚洲副热带的西的喷气溪流(EASWJ)的增加。同时，陆地海在亚洲陆地团之间的热对比和西北太平洋被削弱。陆地海的EASWJ和减小的向南方的移动和增加所有贡献一变弱EASM和EASM降雨异例的热对比。

简介：TheCarboniferousvolcanicrocksinwesternHainanIslandconsistofaseriesofoceanictholeiteandrhyoporphyrite,showingbimodalnature.Similargeochemicalcharacters,intermsofabun-dacesandrelativerationsofincompatibleelementsandREEandtheREEpatterns,betweenthebasaltandcontinentalrift-associatedtholeiiteindicatetheoccurrenceofLatePaleozoicriftinginthearea.Thebasalticmagma,withalowdegreeofevolution,wasoriginatedfromdeepmantle,show-ingcontaminationbylowcrustalmaterial.Therhyoliteisthoughttobeformedfrompartialmeltingofthecontinentalcrustbyhigherthermalflowinariftenvironmentratherthanfromfractionalcrystallizationofabasalticmagma.

简介：Wudalianchi(五大连池)火山是有在东北中国的相当好的暴烈的风景的著名的第四级的。暴烈的岩石是有47.3wt.%的SiO2内容的电唱机碱玄岩，tephri响岩，trachyandesite，和玄武岩的trachyandesite54.2wt.%。高K2在Wudalianchi暴烈的岩石中的O内容建议他们可能分享普通钾的岩浆来源。，Wudalianchi暴烈的岩石的岩浆进化是类似的Laoheishan的新爆发产品(老黑山)和Huoshaoshan(火烧山)火山是稍微，更多比旧爆发材料演变，即，新爆发在的岩浆17191721从上述二座火山是在地下的房间的发展岩浆。Wudalianchi暴烈的岩石的主要斑晶是橄榄石，clinopyroxenes，和一些典型K富有的白榴石。各种各样形状融化包括从Laoheishan和Huoshaoshan火山的新爆发产品在橄榄石斑晶被发现。由电子，分析的微探查(EMP)，SiO2的内容和全部的碱显示出一个宽范围，建议pre暴发的岩浆可能是更复杂的，或melt包括是unhomogeneous。根据EMP结果，排除的硫从这评价，这被相信新爆发比Tianchi的千年爆发的高得多(天池)火山，当时排除的氯率是比Tianchi的低的大小火山。

简介：煤气忍受的暴烈的水库在深Songliao盆被发现了，中国。为日志评估选择合适的解释参数由于复杂矿物质作文和可变矿物质内容是困难的。基于IUGS给的QAPF分类计划，我们建议一个方法用木头数据和一个基因算法决定暴烈的岩石的矿物质内容。根据QAPF计划，在暴烈的岩石中的矿物质被划分成五个组：Q(石英)，A(碱的长石)，P(斜长石)，M(mafic)和F(feldspathoid)。我们建议一个模型为水库的容量的分析包括孔叫了QAPM。为密度，明显的中子孔，运输时间，鲸鱼群妈光线和卷相片的日志反应方程电的生气的节索引首先被建立，矿物质参数从日志矿物质参数的Schlumberger手册获得了。然后，在矩阵的四种矿物质的体积用基因算法(GA)被计算。基于解释参数，计算的孔能与核心孔，和根据四个矿物质内容基于QAPF分类在纸给的岩石名字相比与从核心样品的化学分析的那些兼容。

简介：

简介：Quaternaryvolcanicrocksoftencoexistwithloess,asobservedinthesamegeologicsectionsintheShandongPeninsulaandnorthernpartsofJiangsuandAnhuiprovinces.ThedevelopmentageofShandongloessinclosetothatinthemiddlereachesoftheYellowRiver.LoessstrataareofsynchronousimplicationintheloessbeltofNorthChina.Sotheagesofvolcanicactivitiescanbees-timatedapproximatelyfromthestratigraphicrelationsbetweenloesslayersandvolcanicrocks.There-sultsofdatingoftheQuaternaryvolcanicrocks,bakedlayersandtheTLdatesofloesssamplessug-gestthattheQuaternaryvolcanicactivitycanbedividedinto4stagesintheregionstudied,withtheagesbeing1.15-1.03,0.86-0.72,0.55-0.33and0.02MaB.P.respectively.TheoccurrenceoftephraintheShandongloesssectionsispossibleduetomultipleepisodesofvolcanismduringtheQuaternarytime.

简介：ExtensivevolcanismisoneoftheimportantfeaturesofCenozoicgeologyinChina.Basedontemporal-spatialdistribution,thevolcanismwasassociatedwiththreemajordifferentgeologicalsettings:1)thecontinentalriftbasaltsinNortheastandNorthChina;2)thetension-faultbasaltsonthecontinentalmarginsofSoutheastChina;and3)thecollision-zonehigh-KvolcanicsintheQinghai-XizangPlateauanditsvicinities.Thecharacteristicsof'depletioninthesouthandenrichmentinthenorth'oftheChinacontinentalmantlearestronglysupportedbyisotopicevidence.TheCenozoiccontinentalcalcharacters,intothefollowinggeochemicalprovinces:1)thedepletedmantleinSouthChina;2)theprimarymantleinNortheastandNorthChina;3)thehybridandtransi-tionalmantleintheregionofShandong,Anhui,JiangsuandnorthernZhejiang;4)thedepletedmantlearoundtheBohaiBayandtheLowerLiaoheRiver;5)theK-metasomaticenrichedmantleinthenorthernpartofNortheastChina;and6)there-cycledenrichedmantleintheancientsubductionzoneintheQinghai-XizangPlateauanditssurround-ings.Thesegeochemicalcharacteristicsonaregionalscalemustbeareflectionofthenatureoflithosphereevolution.

简介：

简介：以便区分充满的效果和暴烈的活动并且探索激发富有硅的铁矿石跟踪的活动(IOT)的方法，惰性的石英作为修正被引进标准，上好的影响，锻烧，热治好系统和一些另外的因素被红外调查，XRD，MIP，等等显微镜的方法。磨擦的试验性的结果表演和锻烧罐头仅仅改变SiO2,的非结晶的状态，IOT不在在房间温度下面治好的水泥举办暴烈的活动状况。热治好系统能刺激IOT的活动，特别压热器治好治好的臼系统能消费大量Ca(哦)2和难钙硅酸盐并且有更靠近的结构。当IOT粉末的特定的表面区域是800m2/kg,，30%水泥被IOT代替时，搽粉，有IOT的臼力量粉末比那甚至高与cementonly。

简介：0vcrl00pyrophylliteoccurrcnccs(dcposits,orcsp0tsandmincralisedsp0ts)havebeenfuul1dinChina-Am0ngthemab0ut90%arerelatcdtotbeacti0nofv0lcanicgas-1iquidandaccountf0rabout87Koftbcprovcdrcserves.ManylargcandsuperlarScpyr0phy1litedcp0sitsbclongtothistype.Thercf0re,pyr0phyllitedep0sitsofv0lcanicgas-1iquida1

简介：Thesuperlargecontinentalvolcanicrock-typeuraniumdeposits,whichwerediscoveredabroadlongago,havenotyebeenreporteduptonowinChina.Thisisanimportantproblemthatneedstobeurgentlysolvedbyuraniumgeologistsatpresent.Inthispaper,onthebasisofanalyzingthemetallogenicsettingsandgeologicalconditionsofthesuperlargecontinentalvolcanicrock-typeuraniumdepositsdiscoveredintheworldalongwiththemetallogeniccharacteristicsofthoseofthesametypeinChina,thespace-timedistributionpatternsofcontinentalvolcanicsandthemetallogenicpotentialofmaintectono-volcanicbeltsinChinaarediscussed,andasyntheticconclusionhasbeendrawnthatthereisapossibilitytodiscoverthesuperlargecontinentalvolcanicrock-typeuraniumdepositsinChina.Moreover,itisevidencedthattheGanhang,Nanling,Yanliao,DaHingganLingandothertectono-volcanicbeltspossessfavorablegeologicalconditionsfortheformationofssuperlargeoredepositsofthecontinentalvolcanicrocktype.Theintersectingandoverlappinglocationsoftheaforementionedmainbeltswithothertectono-volcanic(-intrusive)beltsarethemostpotentialareaswherethesuperlargecontinentalvolcanicrock-typeuraniumdepositswouldbefound.

简介：

简介：BasedonelectronprobeanalysesofthemineralsandbulkcompositionoftheCenozoicvolcanicrocksfromYumenandHohXillithodistricts,Qinghai-Xizangplateau,theformingconditionsincludingthetemperatureandpressureofthoserocksarestudiedinthispaperAccordingtothethermodynamiccalculationresultsofmineral-meltequilibrium,thedepthoftheasthenospheresuperface(about75-130km)forthenorthernpartoftheQinghai-XizangplateauduringtheCenozoicissuggested.Finally,thispaperindicatesthattheCenozoicvolcanicrocksinthenorthernpartoftheQinghai-Xizangplateaumainlyconsistofshoshoniteseries.Theirformingtemperatureis630-1039℃andformingpressureisbetween2.3-4.0GPa.Therockswereformedintheintracontinentalorogenicbelt,ofwhichtheprimarymagmawasoriginatedfromaparticularenrichmentuppermantleandaccretedcrust-mantlebeltofdirectlyfromasthenosphericsuperfaceasaresultofpartialofpyrolite.