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Borrning efter interstadiala sediment vid Ultevisplatån, Norrbotten
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för naturgeografi och kvartärgeologi (INK).
2013 (svensk)Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
Abstract [en]

The purpose of this study is to find datable interstadial sediments in the core area of the LateWeicheslian ice sheet extent. Based on geomorphological evidence, three coring sites wereidentified close to the Ultevis plateau in Norrbotten, northern Sweden. Sediment coring wascarried out in two pre-Late Weichselian stream channels and in a sediment basin. Stratigraphyfrom one of the sites, a 100 meter wide meltwater channel, was chosen for further analysis. Thestudied core was 5,93 m long and ended in a lower till unit. The core contained silt and sandbelow an upper till unit, indicating presence of interstadial sediments in the stratigraphy. Thecore was subsampled for luminescence dating. Two samples from above the upper till unit andtwo samples from below this unit were chosen for initial luminescence measurements onfeldspar. These preliminary measurements indicate a significant difference in paleodosebetween the upper samples and the lower. The upper samples displayed relatively highpaleodoses, possibly representing pre-Late Weichselian ages. This could imply presence of twointerstadials in the stratigraphy. The lower samples exhibited significantly higher paleodosesthan the upper ones, possibly indicating early-Weichselian or even Saalian ages for the lowersamples.

sted, utgiver, år, opplag, sider
2013. , s. 37
Emneord [en]
Ultevis, Interstadial, Weichsel, IRSL-measurments, Northern Sweden, Norrbotten, Glacial history
Emneord [sv]
Ultevis, interstadial, Weichsel, IRSL-mätningar, norra Sverige, Norrbotten, istidshistoria
HSV kategori
Identifikatorer
URN: urn:nbn:se:su:diva-94719OAI: oai:DiVA.org:su-94719DiVA, id: diva2:654932
Presentation
2013-06-11, 10:15 (svensk)
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Examiner
Tilgjengelig fra: 2013-10-09 Laget: 2013-10-09 Sist oppdatert: 2013-10-09bibliografisk kontrollert

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Borrning efter interstadiala sediment vid Ultevisplatån, Norrbotten(3474 kB)337 nedlastinger
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