Tectonic evolution and extension at the Møre Margin – Offshore mid-Norway. / Theissen-Krah, S.; Zastrozhnov, D.; Abdelmalak, M. M.; Schmid, D. W.; Faleide, J. I.; Gernigon, L.
In: Tectonophysics, Vol. 721, 28.11.2017, p. 227-238.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Tectonic evolution and extension at the Møre Margin – Offshore mid-Norway
AU - Theissen-Krah, S.
AU - Zastrozhnov, D.
AU - Abdelmalak, M. M.
AU - Schmid, D. W.
AU - Faleide, J. I.
AU - Gernigon, L.
N1 - Publisher Copyright: © 2017 Elsevier B.V.
PY - 2017/11/28
Y1 - 2017/11/28
N2 - Lithospheric stretching is the key process in forming extensional sedimentary basins at passive rifted margins. This study explores the stretching factors, resulting extension, and structural evolution of the Møre segment on the Mid-Norwegian continental margin. Based on the interpretation of new and reprocessed high-quality seismic, we present updated structural maps of the Møre margin that show very thick post-rift sediments in the central Møre Basin and extensive sill intrusion into the Cretaceous sediments. A major shift in subsidence and deposition occurred during mid-Cretaceous. One transect across the Møre continental margin from the Slørebotn Subbasin to the continent-ocean boundary is reconstructed using the basin modelling software TecMod. We test different initial crustal configurations and rifting events and compare our structural reconstruction results to stretching factors derived both from crustal thinning and the classical backstripping/decompaction approach. Seismic interpretation in combination with structural reconstruction modelling does not support the lower crustal bodies as exhumed and serpentinised mantle. Our extension estimate along this transect is ~ 188 ± 28 km for initial crustal thickness varying between 30 and 40 km.
AB - Lithospheric stretching is the key process in forming extensional sedimentary basins at passive rifted margins. This study explores the stretching factors, resulting extension, and structural evolution of the Møre segment on the Mid-Norwegian continental margin. Based on the interpretation of new and reprocessed high-quality seismic, we present updated structural maps of the Møre margin that show very thick post-rift sediments in the central Møre Basin and extensive sill intrusion into the Cretaceous sediments. A major shift in subsidence and deposition occurred during mid-Cretaceous. One transect across the Møre continental margin from the Slørebotn Subbasin to the continent-ocean boundary is reconstructed using the basin modelling software TecMod. We test different initial crustal configurations and rifting events and compare our structural reconstruction results to stretching factors derived both from crustal thinning and the classical backstripping/decompaction approach. Seismic interpretation in combination with structural reconstruction modelling does not support the lower crustal bodies as exhumed and serpentinised mantle. Our extension estimate along this transect is ~ 188 ± 28 km for initial crustal thickness varying between 30 and 40 km.
KW - Basin modelling
KW - Extension
KW - Møre continental margin
KW - Stratigraphy reconstruction
KW - Stretching factors
UR - http://www.scopus.com/inward/record.url?scp=85038235066&partnerID=8YFLogxK
U2 - 10.1016/j.tecto.2017.09.009
DO - 10.1016/j.tecto.2017.09.009
M3 - Article
AN - SCOPUS:85038235066
VL - 721
SP - 227
EP - 238
JO - Tectonophysics
JF - Tectonophysics
SN - 0040-1951
ER -
ID: 86065019