简介：Theso-called“Yangtze-type”copperdepositsinclude:（1）Cu-bearingmassivepyritebed,(2)Cu-bearingskarnandmagnetite-typeoredeposits,withreplacementCu-vein-typedepositsnearthemetasomaticzone,and(3)mineralizedintrusivebodiesandbrecciapipes,someofwhichareknownasporphyrycopperores(e.g.Chengmenshan).ThistypeoforedepositsisatypicalexampletoverifythepolygenesisofinostofthedepositsinChina,ashasbeenpromotedbyProf.TuGuangchiinviewofthepolycyclicdevelopmentofthegeologicalhistoryinChina.Thispaperiscon-cemedwithonesub-typeofsuchdeposits.

简介：ThecharacteristicstructuresofthePrecambrianchertsfromtheGusuisection,Guangdong,Chi-na,includebeddedstructure,laminatedstructure,massivestructureandpseudobrecciatedstructure.ThechertischaracterizedbyconsistentlylowabundanceofTiO2,Al2O3andmosttraceelements.Howevver,itisenrichedinBa,As,Sb,HgandSe.InAl-Fe-Mnternarydiagrams,itfallsintothe'hydrothermalfield'.Correspondenceanalysisandfactoranalysisshowthatmanyelementsshowupinthefactorthatrepresentstheleachingofcountryrocksbyhydrothermalsolutions,andaretheverycharacteristicelementassociationfothegeochemicallyanomalousSouthChinabasement.Petrologicandgeochemicalevidencesuggestsahydrothermaloriginforthechert.ThechertmayhavebeenformedinaPrecambrianfiftoranextensionzonedevelopedwithintheYunkaimarginalgeosyncline,withafaultsystemlinkingittoanunknownheatsourceatdepth.

简介：TheHuhehuSagisoneofthemostimportantoilandgasdepressionsintheHailarBasin.However,theoriginofHuhehuoilisstillcontroversial.PreviousstudiesonsourcerockshavemainlyfocusedontheNantunFormation(K1n);afewstudieshaveinvestigatedtheDamoguaiheFormation(K1d).BasedontheRock–Evalpyrolysisparameters,172drillcuttingsamplesfromtheHuhehuSagwereanalyzedtoevaluatetheirgeochemicalcharacteristics.BasedontheRock–Evaldata,themudstonesfromthefirstmemberoftheDamoguaiheFormation(K1d1)andthesecondmemberoftheNantunFormation(K1n2)havemoderatetohighhydrocarbongenerationpotential,whilemudstonesfromthefirstmemberoftheNantunFormation(K1n1)havepoortogoodhydrocarbongenerationpotential.Additionally,boththeK1n1andK1n2coalmembershavepoortofairhydrocarbongenerationpotential,buttheK1n2coalmemberhasabettergenerativepotential.FifteenHuhehuoilswerecollectedformoleculargeochemicalanalysestoclassifytheoilsintogeneticfamiliesandtoidentifythesourcerockforeachoilusingchemometricmethods.TheHuhehuoilswereclassifiedintothreegroupswithdifferentmaturitylevelsusinghierarchicalclusteranalysisandprincipalcomponentanalysis.GroupAoils(highmaturity)arecharacterizedbyrelativelymoderateratiosofPr/Ph,Pr/n-C17,andPh/n-C18,aswellasanabundanceofC29steranes,mainlyderivedfromtheK1n2andK1n1mudstonemembers.Incomparison,groupBoils(moderatematurity)haverelativelylowPr/Phratios,moderatePr/n-C17andPh/n-C18ratios,andlowconcentrationsofC29steranes.GroupCoils(lowmaturity)showrelativelyhighratiosofPr/Ph,Pr/n-C17,andPh/n-C18,aswellashighconcentrationsofC29steranes.Furthermore,groupBoilsderivedfromtheK1d1mudstonememberandgroupCoilsderivedfromtheK1n2coalmemberwerealsoidentifiedbyprincipalcomponentanalysisscoreplots.CorrelationstudiessuggestamajorcontributionfromtheK1nmudstoneFormation

简介：

简介：Li-Fgranitesallovertheworldcanberepresentedbythreeendmembers,i.e.,theNa-richongonite(O),theK-richxianghualingite(X)andtheSi-richtopazite(T),Charactersandcriteriaarepresentedfortheseend-mnemberrocks,VerticalzoninginLi-Fgranites,asreflectedbyincreasingnormativeQandC(corundum)anddecreasingALK(K2O+Na2O)withincreasingcontentoffluorine,canbeexplainedusingthethree-end-memberschemeintermsofpetrochemistryandnorms.Consideringthedifferenceinmeltstructure,visocosityanddensitybetweentheendmembers,incouplewiththeregulartiesthatgoverntheNa-KandSiALKsegregationknownfromfieldevidenceandexperiments,itissuggestedthatthethreeendmembersmayhaveresultedfromliquidsegregation(immiscibility)ratherthanfromcrystalfractionationascommonlybelieved.

简介：Therearetwogradesofnetwork-typetextureinmetamorphicperidotitefromtheKudaophiolite,Xinjiang,China,Thefirstgraduationconsistsofcoarse-grainedolivinewithplasticdeformationfabrics,orthopyroxeneandminorclinopyroxeneandCr-spinel.Thesecondgraduationconsistsofsmallmineralsfillingamongthemineralgrainsofthefirstgraduation.Fourkindsofassemblagescontainingtremolitehavebeendiscoveredinthesecondgraduation,whichwereformedduringmantlepartialmeltingandmantlemetasomatismofahighlydepletedperidotite.

简介：相当在Gaoqing-Pingnan断层带的环境被开发很多座煤气的水库。把作文基于气体，他们能被划分成二个组，即，CO2和CH4。他们的作文和同位素地球化学在这研究被处理。CO2内容从60.72%-99.99%，从-3.41per的三角洲~(13)C_(CO2)价值千---9.8per千，并且从4.35xl0~的3He/4He比率(-6)-6.35xl0'6(即R/Ra=4.45-4.35)。在作文和同位素地球化学上基于数据，深地质的背景，深断裂和火山岩，它被看在Gaoqing区域散布的那CO2，主要从披风来源发源与magmatic被联系的无机的物质。为CO2水库的形成的有利构造环境是裂缝，它与大fault-magmatic活动，CO2煤气的水池的形成和他们到最近的magmatic活动的时空关联有关。烃煤气的水池发生在Huagou区域。CH4内容在88.83%-99.12%的范围以内，并且三角洲~(13)C_(CH4)每千珍视-44.7--54.39每千。这显示烃气体在高温度源于油类型气体的分解。在CO2煤气的水池的火山岩--并且CH4煤气的水池分布式的区域在Fe2O3和FeO内容显示出重要差别。这证明了烃气体可能源于各种各样的化学反应。Magmatic活动是为在Gaoqing-Pingnan断层带的CO2和CH4气体水池的分发的主要原因。

简介：Linnan潜水艇下垂是Linpan油地区的主要的油制片人。基于油组作文，煤气的层析数据和简历标记分析，从不同油矿的原油在组作文极大地变化了并且在先锋类型，原油成熟和烃depositional的方面显示出明显的异质，这被显示。根据源岩的特征，三张油人口能被区分，即，南部、北、过渡的油人口。根据水库以后的重做的过程，而且，媒介在成熟，六个油家庭和12个亚科产生烃的环境和差别调节是distinquished。综合研究建议在原油作文导致如此的异质的因素主要包括不同源岩，多级式在油/气体移植，水库异质和各种各样的水库以后的第二等的改变期间油/气体收费、geo色析法的效果。

简介：TheUpperSinianbeddedchertsarewidelydistributedonthesoutheastcontinentalmarginoftheYangtzeplate,withatotalthicknessrangingfrom20to150m,Thechertsareverysimpleinchemicalcomposition,withthecontentsofsiliceousmineralsexceeding90%andthoseofothermineralspeciesbeingverylow.Thetotalcontentoftraceelementsisconsiderablyvarialbe,Thecontentsofmosttraceelementsarelowascomparedwiththeircrustclarkevalues.ButthesechertsareveryrichinthetraceelementsBa,As,Ab,AgandU,coupledwithrelativelyhighcontentsofFe,MnandlowcontentsofAl,Ti,andMg,ItcanbeidentifiedasthechertsofhydrothermaloriginintermsofthevaluesofFe/Ti,(Fe+Mn)/Ti,Al/(Al+Fe+Mn)andU/Th,IntheAl-Fe-Mn,andFe-Mn-(Cu+Ni+Co)×10diagramsandlg[U]-lg[Th],Cr-Zrdiagrams.allthesamplesfromtheareastudiedfallwithinthehydrothermalsedimentfield.Allthesecharacteristicsshowthatthechertsaremainlytheproductofhydrothermalprocesses.Thefactthattheδ30Sivaluesofthechertrangefrom0.0‰to0.7‰withδ18Ofrom20.1‰to23.6‰cleralymanifeststhatthesubmarinehydrothermalwateristhemainsourceofsilica.

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简介：HavingstudiedthebiomarkercompositionandmaturityofdissolvedhydrocarbonsfromOrdovicianformationwaters,theauthorspresentedmoleculargeochemicalevidenceforthecontroversialoriginofnaturalgasesincentralOrdosBasin.ThedissolvedhydrocarbonsinWellShan12andWellShan78arerelativelyhighinabundanceoftricylicterpane,pregnaneseriesanddibenzothiopheneseriesandlowinPr/Ph(＜2)andhopane/steraneratios,indicatingthesourceinputofmarinecarbonates.Incontrast,thedissolvedhydrocarbonsinWellShan81arefreefromtricyclicterpaneandpregnaneseries,withtracedibenzothiopheneseriesandhighPr/Ph(3.27)andhigherhopane/steraneratios,whicharethetypicalfeaturesofterrestrialorganicmatter.Furthermore,WellShan37andWellShan34arebetweenthetwosituations,havingamixedsourceofmarinecarbonateandterrestrialorganicmatter.Thematurityofbiomarkersalsosupportstheabovesuggestions.Theseresultsareconsistentwiththegeologicalbackgroundandsourcerockdistributioninthisregion.

简介：有CO2的高内容的天然气水池在探索Hailar-Tamtsag盆的中间的差错地区期间被发现。到目前为止有有碳同位素的特征的CO2的这种煤气的水库是特殊的。在学习区域的CO2的稳定的碳同位素与13$C_是相对轻的{CO_2}$C_{CO_2}价值从13.1～8.2。联系的氩气体的40Ar/36Ar价值从916～996，与1.201.26的R/Ra。基于全面分析，在这个学习区域的CO2气体具有外壳披风来源，这被相信。