Arctic rockwall retreat rates estimated using laboratory-calibrated ERT measurements of talus cones in Longyeardalen, Svalbard

Auteur(s) et Affiliation(s)

SIEWERT, M.B.

Dep. of Geography, Univ., Bonn, Allemagne

Geology Dep., Univ. Centre in Svalbard, Longyearbyen, Norvege

KRAUTBLATTER, M.

Dep. of Geography, Univ., Bonn, Allemagne

Engineering Geology, Technische Univ., München, Allemagne

CHRISTIANSEN, H.H.

Geology Dep., Univ. Centre in Svalbard, Longyearbyen, Norvege

Inst. of Geosciences, Univ., Oslo, Norvege

ECKERSTORFER, M.

Geology Dep., Univ. Centre in Svalbard, Longyearbyen, Norvege

Inst. of Geosciences, Univ., Oslo, Norvege

Description :
Here the AA. investigate Holocene rockwall retreat of exposed arctic sandstone cliffs in Longyeardalen, central Svalbard and apply laboratory-calibrated electrical resistivity tomography (ERT) to determine talus sediment thickness. Temperature-resistivity functions of 2 sandstone samples are measured in the laboratory and compared with borehole temperatures from the talus slope. High-resolution LiDAR-scanning and ERT subsurface information were collated in a GIS to interpolate the bedrock surface and to calculate the sediment volume of the talus cones. The resulting volumes were referenced to source areas to calculate rockwall retreat rates. The rock mass strength was estimated for the source areas.

Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2012, vol. 37, n°. 14, p. 1542-1555, nombre de pages : 14, Références bibliographiques : 2 p.

Date :
2012

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley

Langue :
Anglais