简介:TheGongheBasin,aCenozoicdown-warpedbasin,islocatedinthenortheasternpartoftheQinghai-Xizang(Tibetan)Plateau,andspreadoverimportantnodesofthetransferofmultipleblocksinthecentralorogenicbeltintheNWWdirection.Itisalsocalled“QinKunFork”and“GongheGap”.Thebasinhasahighheatflowvalueandobviousthermalanomaly.Thegeothermalresourcesaremainlyhotdryrockandundergroundhotwater.Inrecentyears,themechanismofgeothermalformationwithinthebasinhasbeencontroversial.Onthebasisofunderstandingtheknowledgeofpredecessors,thispaperproposesthegeothermalformationmechanismofthe“heatsource–heattransfer–heatreservoirandcaprock–thermalsystem”oftheGongheBasinfromtheperspectiveofageologicalbackgroundthroughdataintegrationintegratedresearch-expert,discussion-graph,compilation-fieldverificationandotherprocesses:(1)Heatsource:geophysicalexplorationandradioisotopecalculationsshowthattheheatsourceofheatinthebasinhasboththecontributionofmantleandtheparticipationoftheearth'scrust,butmainlythecontributionofthedeepmantle.(2)Heattransfer:Thepetrologicalpropertiesofthebasinandtheexposedstructurepositionofthesurfacehotspringsshowthatonetransfermodeisthematerialofthemantlesourceupwellsandinvadesfromthebottom,directlyinjectingheat;theotheristhatthedeepfaultconductsthedeepheatofthebasintothemiddleandlowerpartsoftheearth'scrust,thenthesecondaryfracturetransferstheheattotheshallowpart.(3)Heatreservoirandcaprock:First,theconvectivestrip-shapedheatreservoirexposedbythehotspringsontheperipheralfaultzoneofthebasin;second,theunderlyinghotdryrocklayeredheatreservoirandtheuppernewgenerationheatreservoirandcaprockinthebasinrevealedbydrillingdata.(4)Thermalsystem:Basedonthecharacteristicsofthe“heatsource-heattransfer-heatreservoirandcaprock”,itispreliminarilybelievedtha
简介:ContinentalChinahasmoveddextralEastwardsinceCenozoictime,drivenbythecollisionoftheIndianwiththeEurasianplate.Evidenceforthiscomesfromlandscapeevolution,thedistributionofearthquakeepicenters,Cenozoicsedimentaryandvolcanicrocks,andthemeasurementofGPSvelocityvectors,thedistribntionofcrustalstress,paleomagneticdata,anddeepmantlestructure,amongothers.Thismovementcommencedaround40Ma,coupledwiththickenedlithosphereandwidespreadstressreleasealongstrikeslipfaultsthatboundthecontinentalChineseblock.BecauseofcontinuedNorthwardsubductionoftheIndianplate,manifestationofthedextralmovementhasintensifiedsince25Ma.Far-reachingeffectsincludeextensivestrike-slipmovementontheTan-LufaultinEasternChina,formationoftheDabieultrahighpressuremetamorphicterrane,extensivethrustfaultsinEastChina,delaminationandthickeningofthelithosphereofSouthChina,apossibletectonicdoublingoftheMiddle-LowerYangtzeValleymetallogenicbelt,andtheformationoftheJapan,Huanghai(EastChina),andSouthChinaSea.
简介:ApplyingthecrustobodygeotectonictheorytogeologicalprospectingattheLancangjiangrivermetallogenicbeltinwesternYunnanprovince,andonthebasisofthebasicgeologicalbackgroundofwesternYunnanandthespace-timeevolution-movementhistorical-dynamicfeaturesoftheLancangjiangrivertectonicbelt,theauthorhasdiscussedfirstlythemetallogenesisoftheLancangjiangrivertransitionalfieldtectoniczone,whichcanprovideanewtheoreticalfoundationforexploringthespace-timelawsofmineralizationinthisregion.
简介:摘要:Limahe侵入是在Panxi区域招待Cu-Ni硫化物沉积物的典型岩石。主要元素,踪迹元素和Sr-Nd同位素的geochemical数据第一并且全身地在这研究被报导。改正年龄(87Sr/86Sr),并且Nd(t)同位素值,从0.687062~0.709298,从0.6~4.13分别地,部分重叠Emeishan暗岩和OIB的领域,并且他们通常在上面的外壳和OIB之间躺着。在Limahe侵入和Emeishan大火的省的辉石之间的类似的模式暗示基因关系到Emeishan暗岩。他们的更低的Nb/U(<30),更高(La/Nb)下午并且(Th/Ta)下午比率珍视(>1)显示上面的外壳材料的污染。在MgO和主要氧化物之间的关联在深层的房间反映橄榄石,clinopyroxene和次要的斜长石的部分结晶化。由上面的外壳的污染的因此增加的SiO2和降低的FeO可以触发不能混合的硫化物融化,它然后沿着结构的破裂流动了并且侵入了进gabbrodiorite,导致Cu-Ni硫化物orebody的形成。
简介:InordertomakeabreakthroughinMesozoic-PaleozoicshalegasexplorationintheSouthYellowSeaBasin,acomparisonofthepreservationconditionswasmadewithintheBarnettshalegasreservoirsintheFortworthBasin,theJiaoshibashalegasreservoirsinSichuanBasinandpotentialshalegasreservoirsinGuizhouProvince.Theresultsshowthatthe"Sandwich"structureisofgreatimportanceforshalegasaccumulation.Thereinto,the"Sandwich"structureisakindofspecialreservoir-caprockassemblagewhichconsistoflimestoneordolomiteonthetop,mudstoneorshalelayerinthemiddleandlimestoneordolomiteatthebottom.InconsiderationoftheMesozoic-PaleozoieintheLowerYangtze,andLaoshanUpliftwithweakPaleozoicdeformationandthrustfaultsealingOnbothflanksoftheLaoshanUplift,aconclusioncanbedrawnthatthepreservationconditionsofshalegasprobablydeveloped"Sandwich"structuresintheLowerCambrianandPermian,whicharekeylayersforthebreakthroughofshalegasintheSouthYellowSea.Moreover,thepreferredtargetsforshalegasdrillingprobablylocateatbothflanksoftheLaoshanUplift.
简介:这份报纸在Paleogene的Shahejie形成在Dongying消沉在页岩水库上被进行。基于详细核心描述,摇薄节,擦亮的氩离子,扫描电子显微镜学(SEM)分析,CT扫描和碳氧同位素的测试,inter-laminar的形成机制断裂(或缝接)并且他们的发展条件被diagenetic进化特征和水库空间进化特征的全面分析讨论。结果证明在Dongying消沉的把压成薄片的合成模式被把压成薄片的方解石和泥土矿物质的垂直分发统治。形成对照到传统的理解,inter-laminar破裂的发展度低得多。没有框架矿物质,和微缝接是的先存在的很好连接的毛孔或水平过压,在层之间的纯液体不能存在液体移植的有利路径。从inter-laminar破裂起源机制和它的进化的点,所谓的缝接,比那烃代提起了毛孔压力并且导致了平行microfractures的传统的理解是更多建筑群。但是inter-laminar破裂与那有小关系迭合是否被开发或床上用品边界是清楚的。事实上,页岩水库inter-laminar破裂不是严密骨折。他们被先存在控制内部小粒的毛孔(或缝接)或溶解毛孔,散布了碳酸盐薄片边界并且被以后的超级压力连接,溶解和渗出物力量。并且开发条件是埋葬深度(比3000m大)并且Ro值(>0.6%)。它的起源和进化的讨论有重要石油优化水库片断和有利目标区域选择上的地质的意义。
简介:Inthispaper.itisdemonstratedthatthereexistmarinehorizonsintheupperpartofthelowersubcycleandtheuppersubeycleoftheKizilsuGroupinXinjiang.basedonnewevidenceofauthigenicglauconite.boroncontent.carbonandoxygenstablcisotopicanalyses.andlithologicalandsedimentaryfeatures.Theup-perpartofthelowersubeycleisthelowermostmarinehorizonoftheCretaceousinthewesternTarimBasin,whichisinferredtobeofBarremianage.
简介:繁峙县是山西省泥石流较发育的县市之一,五台山北麓泥石流发育特征比较典型,该泥石流沟位于五台山景区内,严重威胁当地人民生命及财产安全.本文对伯强沟进行了详细的野外调查,获取了研究区泥石流沟的基础数据资料,分析了伯强沟泥石流基本特性,通过对流域物源来源、补给长度、堵塞程度的计算,得出了该泥石流沟的发展阶段及易发程度,结合野外资料采用多因子评价公式,对伯强沟泥石流沟做出了险情等级及危险性评估,得出该泥石流沟处于形成期(青年期)一发展期(壮年期),危险性发生几率大,成灾可能性大的结论,并且针对该泥石流沟的发育特征的认识及数据分析,提出泥石流综合治理的防治对策.