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Försök till tefrokronologisk datering av sediment från övergången yngre dryas-preboreal genom korrelation med en tidigare studie
Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology.
2012 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [sv]

Syftet med denna studie var att försöka datera en sedimentstratigrafi genom att undersöka möjligheten till korrelation med resultaten från en tidigare studie via tefrokronologiska metoder. Tefrokronologi är studierna och metoderna där man identifierar och daterar tefra (vulkanaska) i lagerföljder för att användas som ett synkroniseringsverktyg mellan olika sedimentstratigrafier. I denna studie genomfördes analys av organiskt kol, XRF-scanning, extrahering och mikroskopering av tefra samt försök till kemisk analys genom elektronmikroskopering av en borrkärna från Fågelmossen i södra Sverige. Tefra hittades i botten av borrkärnan och med hjälp detta fynd i kombination med främst analys av organiskt kol kunde borrkärnans stratigrafi korreleras med resultaten från den tidigare studien.

Abstract [en]

The purpose of this study was to attempt to date a sediment stratigraphy by examining the possibility for correlation with the results from a previous study using tephrochronological methods. Tephrochronology is the studies and methods which identifies and dates tephra (volcanic ash) in strata for use as a synchronization tool between various sediment stratigraphies. In this study, analysis of organic carbon, XRF scanning, extraction and microscopic examination of tephra and an attempt for chemical analysis by electron microscopy was conducted of a drill core from Fågelmossen in southern Sweden. Tephra was found in the bottom of the drill core and by using this finding, combined mainly with the analysis of organic carbon, the drill core stratigraphy could be correlated with the results from the previous study.

Place, publisher, year, edition, pages
Keyword [sv]
tefrokronologi, datering, sediment, stratigrafi, lagerföljd, deglaciation, tefra, Vedde, yngre, dryas, preboreal, pleistocen, holocen
National Category
Earth and Related Environmental Sciences
URN: urn:nbn:se:su:diva-77686OAI: diva2:534908
2012-06-05, Geovetenskapens hus, Svante Arrhenius väg 8, Stockholm, 14:15 (Swedish)
Life Earth Science
Available from: 2012-07-27 Created: 2012-06-18 Last updated: 2012-07-27Bibliographically approved

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Simon Larsson, 2012 - SU GE6011 - kandidatexamensuppsats(518 kB)355 downloads
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