Magnetic excursions recorded in the Middle to Upper Pleistocene loess/palaeosol sequence Wels-Aschet (Austria)

EG Quaternary Science Journal Pub Date : 2013-03-15 DOI:10.3285/EG.62.1.02

Scholger Robert, Terhorst Birgit

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引用次数: 8

Abstract

WepresentthepalaeomagneticexaminationoftheMiddletoUpperPleistoceneloess/palaeosolsequenceintheformerpit� 'Wurz- burger'� locatedinAschetnearWels.�Fivestronglydevelopedpalaeosols,� respectivelypedocomplexesalternatewithinterposing� loessloam.� Bymeansofexcavationaccesswasgainedtoaprofilewithathicknessof�12�m.�Altogether,� 587�orientatedsampleswere� takenforthemagnetostratigraphicanalysisatthePaleomagneticlaboratoryoftheMontanuniversitatLeoben,�ensuringanear- completesampling.� Thesamplesweredemagnetisedbymeansofalternatingfieldaswellasthermaldemagnetisation.� Themag- neticparametersshowasequenceofsectionswithstrongmagnetiteformationinthesoil,�whichcanbeassignedtotherelatively� warmclimateofinterglacialperiods.� Themajorityofsamplesshowedcharacteristicremanencedirectionswithintherangeofthe� normalglobalmagneticfieldofthePleistocene.� Somesectionsshowedstronglydeviatingremanencedirections,� indicatingexcur- sionsoftheglobalmagneticfield.�TheexcursionsobservedintheWels-Aschetprofileareassignedtothetimeintervalof�570�ka� (Emperor-BigLost-CalabrianRidge)�until� 110� ka�(Blake)�duetopalaeopedological-stratigraphical� considerations.� TheBrunhes/

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奥地利wells - aschet中上更新世黄土/古土壤层序的磁偏移记录

我们介绍了位于威尔士附近aschette的前地层“Wurz- burger”的中第三纪更新世/古溶蚀层序的古地磁检查。“五个非常发达的古溶洞”，分别是土壤复合体，与中间的“黄土”交替存在。12�Bymeansofexcavationaccesswasgainedtoaprofilewithathicknessof��m。在蒙大利奥本古地磁实验室，总共采集了587个定向样本，进行了磁地层分析，确保了近乎完整的采样。�Thesamplesweredemagnetisedbymeansofalternatingfieldaswellasthermaldemagnetisation。“磁学参数显示了土壤中具有强磁性形成的剖面序列”，这可以归因于间冰期相对温暖的气候。绝大多数样品显示了在更新世正常全球磁场范围内的特征残余方向。“一些剖面显示出强烈的磁性偏离方向，”表明全球磁场的偏移。在威尔斯-阿斯切特剖面上观察到的远足被分配到570万年(皇帝-大洛斯-卡拉布里安岭)至110万年(布莱克)的时间间隔。�TheBrunhes /

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EG Quaternary Science Journal

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