刘强,游海涛,刘嘉麒

• 1:中国科学院地质与地球物理研究所
• 2:中国科学院地质与地球物理研究所
• 3:中国科学院地质与地球物理研究所 北京100029
• 4:北京100029吉林大学地球科学学院吉林长春130061

摘要(Abstract)：

年纹层发育的湖泊沉积物可以提供独立的、绝对定年的时间标尺,为重建高分辨率的区域古地磁场长期变化主曲线提供了难得的条件;基于长而连续的湖泊沉积物年纹层时间标尺建立的区域磁偏角和磁倾角长期变化参考曲线大大增强了岩芯对比和古地磁定年结果的精确性。此外,满足特定条件的湖泊沉积物还可以提供古地磁场强度长期变化的记录并有助于反映宇宙成因核素(如14C、10Be等)产生速率的变化、太阳活动等信息;目前,湖泊沉积物纹层年代学时间标尺及古地磁研究程度较高的主要是瑞典、芬兰和北美一些地区,区域古地磁场长期变化主曲线的地理分布并不均匀,因此在全球范围内寻找长序列的、连续的年纹层发育的湖泊进行古地磁研究可以更好地理解仪器观测记录以前的地磁场行为。

关键词(KeyWords)： 湖泊沉积物;年纹层;古地磁场长期变化;古地磁定年

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学青年基金资助项目(40302023);; 中科院知识创新工程重要方向项目(KZCX3-SW-145)

作者(Author): 刘强,游海涛,刘嘉麒

Email:

DOI:

参考文献(References)：

• [1]　KingJ,PeckJ.Useofpaleomagnetisminstudiesoflakesedi-ments[A].In:LastWM,SmolJP.TrackingEnvironmentalChangeUsingLakeSediments(Vol.1):BasinAnalysis,Cor-ing,andChronologicalTechniques[C].Dordrecht:KluwerA-cademicPublishers,2001.371-389.
• [2]　MackerethFJH.Onthevariationindirectionofthehorizon-talcomponentofremanentmagnetizationinlakesediments[J].EarthandPlanetaryScienceLetters,1971,12:332-338.
• [3]　TurnerGM,ThompsonR.Lakesedimentrecordofthegeo-magneticsecularvariationinBritainduringHolocenetimes[J].GeophysicalJournaloftheRoyalAstronomicalSociety,1981,65:703-725.
• [4]　KingJW,BanerjeeSK,MarvinJ,etal.Useofsmall-ampli-tudepaleomagneticfluctuationsforcorrelationanddatingofcontinentalclimaticchanges[J].Palaeogeography,Palaeocli-matology,Palaeoecology,1983,42:167-183.
• [5]　HuttunenP,StoberJ.DatingofpalaeomagneticrecordsfromFinnishlakesedimentcoresusingpollenanalysis[J].Boreas,1980,9:193-202.
• [6]　刘嘉麒,刘东生,储国强,等.玛珥湖与纹泥年代学[J].第四纪研究,1996,(4):353-358.
• [7]　李万春,李世杰,濮培民.高分辨率古环境指示器——湖泊纹泥研究综述[J].地球科学进展,1999,14(2):172-176.
• [8]　BrauerA,NegendankJFW.ThevalueofannuallylaminatedlakesedimentsinPalaeoenvironmentreconstruction[J].Qua-ternaryInternational,2002,88:1-3.
• [9]TiljanderM,OjalaA,SaarinenT,etal.Documentationofthephysicalpropertiesofannuallylaminated(varved)sedimentsatasub-annualtodecadalresolutionforenvironmentalinter-pretation[J].QuaternaryInternational,2002,88:5-12.
• [10]MornerNA,SylwanCA.Detailedpalaeomagneticrecordforthelast6300yearsfromvarvedlakedepositsinNorthernSwe-den[A].In:LowesFJ,CollinsonDW,ParryJH,etal.Geo-magnetismandPalaeomagnetism[C].Dordrecht:KluwerAca-demicPublishers,1989.63-70.
• [11]BakhmutovVG,ZagniyGF.Secularvariationofthegeomag-neticfield:DatafromthevarvedclaysofSovietKarelia[J].PhysicsoftheEarthandPlanetaryInteriors,1990,63:121-134.
• [12]SaarinenT.High-resolutionpalaeosecularvariationinnorth-ernEuropeduringthelast3200years[J].PhysicsoftheEarthandPlanetaryInteriors,1998,106:299-309.
• [13]OjalaAEK,SaarinenT.PalaeosecularvariationoftheEarth'smagneticfieldduringthelast10000yearsbasedontheannuallylaminatedsedimentofLakeNautajarvi,centralFin-land[J].TheHolocene,2002,12(4):391-400.
• [14]SnowballI,SandgrenP.Geomagneticfieldvariationsinnorth-ernSwedenduringtheHolocenequantifiedfromvarvedlakesedimentsandtheirimplicationsforcosmogenicnuclidepro-ductionrates[J].TheHolocene,2002,12(5):517-530.
• [15]OjalaAEK,TiljanderM.Testingthefidelityofsedimentchronlogy:ComparisonofvarveandpaleomagneticresultsfromHolocenelakesedimentsfromcentralFinland[J].Qua-ternaryScienceReviews,2003,22:1787-1803.
• [16]StockhausenH.Geomagneticpalaeosecularvariation(0—13000yrBP)asrecordedinsedimentsfromthreemaarlakesfromtheWestEifel(Germany)[J].GeophysicalJournalInter-national,1998,135:898-910.
• [17]BrandtU,NowaczykNR,RamrathA,etal.Palaeomag-netismofHoloceneandLatePleistocenesedimentsfromLagodiMezzanoandLagoGrandediMonticchio(Italy):Initialre-sults[J].QuaternaryScienceReviews,1999,18:961-976.
• [18]VerosubKL.Paleomagnetismofvarvedsedimentsfromwest-ernNewEngland:Secularvariation[J].GeophysicalResearchLetters,1979,6(4):245-248.
• [19]SprowlDR,BanerjeeSK.High-resolutionpaleomagneticrecordofgeomagneticfieldfluctuationsfromthevarvedsedi-mentsofElkLake,Minnesota[J].Geology,1985,13:531-533.
• [20]SprowlDR,BanerjeeSK.TheHolocenepaleosecularvaria-tionrecordfromElkLake,Minnesota[J].JournalofGeophys-icalResearch,1989,94(B7):9369-9388.
• [21]LarsenCPS,MorrisWA,MacDonaldGM.Recordsofgeo-magneticsecularvariationsince1200ADandthepotentialforchronologicalcontroloflakesedimentsinnorthernAlberta[J].CanadianJournalofEarthSciences,2000,37:1711-1722.
• [22]SaarinenT.PalaeomagneticdatingofLateHolocenesedimentsinFennoscandia[J].QuaternaryScienceReviews,1999,18:889-897.
• [23]OjalaAEK,SaarnistoM,SnowballAI.Climateandenvi-ronmentalreconstructionsfromScandinavianvarvedlakesedi-ments[J].PAGESNews,2003,11(2&3):10-12.
• [24]TauxeL.Sedimentaryrecordsofrelativepaleointensityofthegeomagneticfield:Theoryandpractice[J].ReviewsofGeo-physics,1993,31:319-354.