Blockfields in Reinheimen Nationalpark, Norway – Neogene weathering remnants or Quaternary periglacial origin?

TY - ABST

T1 - Blockfields in Reinheimen Nationalpark, Norway – Neogene weathering remnants or Quaternary periglacial origin?

AU - Andersen, Jane Lund

AU - Egholm, David Lundbek

AU - Knudsen, Mads Faurschou

AU - Linge, Henriette

AU - Jansen, John D.

AU - Olsen, Jesper

AU - Tikhomirov, Dmitry

PY - 2016

Y1 - 2016

N2 - It is an ongoing debate whether the degree of chemical weathering in mountain regolith can be used to infer a pre-Quaternary formation history (e.g. Strømsøe and Paasche, 2011; Goodfellow 2012). Here we present a new dataset of in-situ produced cosmogenic 10Be and 26Al along with sediment analyses from five pit profiles dug through regolith mantle on the easternmost summits of Reinheimen Nationalpark in Norway. The study area only shows sporadic signs of glacial erosion, and could be classified as a relict non-glacial surface. We aim to use the residence time of regolith in this area to infer rates of landscape evolution of the mountain summit.ReferencesGoodfellow B W, 2012. A granulometry and secondary mineral fingerprint of chemical weathering in periglacial landscapes and its application to blockfield origins. Quaternary Science Reviews, 57, 121- 135.Strømsøe J R, Paasche Ø, 2011. Weathering patterns in high-latitude regolith. Journal of Geophysical Research: Earth Surface, 116 (F3)

AB - It is an ongoing debate whether the degree of chemical weathering in mountain regolith can be used to infer a pre-Quaternary formation history (e.g. Strømsøe and Paasche, 2011; Goodfellow 2012). Here we present a new dataset of in-situ produced cosmogenic 10Be and 26Al along with sediment analyses from five pit profiles dug through regolith mantle on the easternmost summits of Reinheimen Nationalpark in Norway. The study area only shows sporadic signs of glacial erosion, and could be classified as a relict non-glacial surface. We aim to use the residence time of regolith in this area to infer rates of landscape evolution of the mountain summit.ReferencesGoodfellow B W, 2012. A granulometry and secondary mineral fingerprint of chemical weathering in periglacial landscapes and its application to blockfield origins. Quaternary Science Reviews, 57, 121- 135.Strømsøe J R, Paasche Ø, 2011. Weathering patterns in high-latitude regolith. Journal of Geophysical Research: Earth Surface, 116 (F3)

UR - http://www.skb.se/publikation/2483898/Nordic%20workshop.pdf

M3 - Conference abstract for conference

T2 - Third Nordic Workshop on Cosmogenic Nuclides

Y2 - 8 June 2016 through 11 June 2016

ER -