简介：系统的Ce异例为整个岩石从跨越奥陶纪/志留纪(O/S)的页岩主导、连续、远洋的沉积序列被获得了在Tieshui的边界()Xiushan()，重庆()，华南。越过O/S边界的Ce异例在三间隔被认出，Wufeng()，Guanyinqiao()并且Longmaxi()。计算Ce/Ce*Wufeng形成的价值从0.84～0.96(avg。0.90)。在Guanyinqiao形成，计算Ce/Ce的价值*从0.73～0.85(avg。0.79)。Ce/Ce*价值最高从0.87～0.96的Longmaxi形成范围(avg。0.91)。沿着节，Ce异例的大小总是是否定的，但是在Guanyinqiao形成是更重要的。相对更高的Ce/Ce*在Wufeng和Longmaxi页岩的价值是可能的由于在减少的条件下面扔的沉积。Ce异例显然确实在伴随突出的集体扑灭的缺氧的事件起一些常规作用，并且这个工作为在结束抑制模型提供批评重要性的新数据--奥陶纪缺氧的事件和集体扑灭。

简介：Anewmethodfordeterminingthepartialmeltingdepthofmantle-derivedmagmaandlithosphericthicknessincontinentalregionsisderivedfromREEgeochemistry.ThiseffectivetechniqueusesvariationsintheCe/YbandSm/YbratiosfoundinmainlyvolcanicrocksincontinentalChina.TheratioschangewiththedepthoforiginconsistentwiththecorrelationbetweenlithosphericthicknessandtheCe/YbandSm/Ybratiosfoundinoceanicbasalt.Theseratiosincreaseexponentiallywiththedepthoforigin,thelithosphericthickness,ofawidevarietyofCenozoicvolcanicbasaltandPaleozoickimberliteintheNorthChinaCraton,northeasternChinacontinentandvicinity.Thisfunctionalrelationshipwithdepthisshowninaplotoftheratiosthatformsaconcordiacurve,whichiscloselyexpressedbyformulasusing8-degreepolynomials.Theseprovideamoreaccurategageinmeasuringthelithosphericthicknessthanthetraditionalgeophysicalmethods.Whenappliedtovolcanicrockofdifferentagesitalsorevealshowthethicknesshaschangedovertimeandthus,greatlyaidstheunderstandingofthetectonichistory.RelationsbetweentheCO2content,mineralreactionsandpressureintheupperasthenospherebeneaththebaseofthelithosphereappearstoaffecttheproportionsofREEinpartialmeltsandbringsaboutaclosecorrelationbetweenlithosphericthicknessandtheCe/YbandSm/Ybratiosinmantle-derivedmagmaticrock.Thisthicknessgauge,forbothcontinentalandoceaniclithosphere,providesanewapproachinanalyzingthelithosphericthicknessindifferenttectonicsettingsandgeologictimes.

简介：Ceriumisoneofmultivalentrearearthelements,whichcantransferfromtrivalencetotretavalenceatoxidizingenvironment.ThisprocessmaycausevariabledegreesoffractionationofCefromothertrivalentrearearthelements,andthusmayprovidespecificinsightintothegeologicalprocessesassociatedwithmarkedredoxomorphism.MultiplegeochemicaltracingofSr-Nd-CeisotopesareperformedonthefelsicandmaficintrusivesoftheNeoproterozoic(~800Ma)HuanglingcomplexlocatedattheeasternThreeGorges,SouthChina.TheintrusiverocksexclusivelyshowvariousextentsofnegativeCeanomalies.OntheεCe-εNdplot,mostsamplesfromthemaficintrusionsscatterwithinthesecondquadrant,whereasthosefromthefelsicintrusionswithinthefourthQuadrant.Bothofthetwogroupsexhibitrelativelylargerangeof?Ce(t)variationbutlimited?Nd(t)range,whichcauseadeviationfromthe'crustalarray'andrevealadecoupledNd-Ceisotopecorrelation.Theintermediate-felsicsuitehavevariedCe/Ce*ratiosbutbroadlyproximateεCe(t)values,indicatingthattheirnegativeCeanomaliesweregeneratedduringthemagmatism;onthecontrary,apositivecorrelationbetweenεCe(t)andCe/Ce*isobservedfortheintermediate-maficsuite,anindicationofanoriginofpost-magmaticalterationormetamorphismfortheirCeanomalies.Calculationofmodelage,theoccurrenceageofnegativeCeanomalies(TCe)fortheintermediate-maficsamplesinfersthatthealterationeventstookplace>350Ma.DatashowedthatnegativeCeanomaliesofthefelsicintrusionsmayreflectanincreaseofoxygenfugacityduringmagmaascending,ratherthananinheritancefromtheirsourcerocks.ThisexplanationimpliesthattheNeoproterozoicmagmatismoccurredatthecontinentalnucleusoftheYangtzeblockweredevelopingatageodynamiccontextofrapidlyregionaluplifting.

简介：4月26日,由北京地质学会主办、北京大学地球与空间科学学院协办的＂院士讲地灾＂高峰论坛在北京大学举行。论坛由中国地质科学院地质力学研究所地震专家邓乃恭主持,北京市地勘局局长魏连伟、北京市科协副主席田文到会并讲话。

简介：2006年11月1日至4日，由我会联合华东各省市地质学会联合主办的“2006年华东六省一市地学科技论坛”在江西省南昌市隆重举行，来自华东六省一市的130多位地学专家和地质工作者欢聚一堂，共商如何推进新形势下地质找矿工作，提高公益性地质工作服务水平。论坛进行院士专家学术报告、大会学术交流和野外地质考察等三部分。论坛编辑出版了“加强地质工作，促进可持续发展”的论坛论文集。江西省副省长熊盛文、原全国政协常委、地矿部部长朱训等领导同志出席论坛开幕式。我会有10名代表参加会议，1人在大会上做典型发言。

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简介：为了积极响应国务院推动京津冀协同发展战略,加快跟进《京津冀协同发展纲要》落地,充分发挥地质工作基础支撑、先行先决的重要作用,加快地质工作顶层设计,充分发挥互联网＋的优势,保障京津冀地质资源环境安全,为京津冀协同发展献言献策。北京地质学会与天津地质学会、河北省地质学会将于2016年6月上旬在北京共同举办＂京津冀地质生态环境协同发展高层论坛（2016年）＂。