Regional structure and polyphased Cretaceous-Paleocene rift and basin development of the mid-Norwegian volcanic passive margin. / Zastrozhnov, Dmitry; Gernigon, Laurent; Gogin, Iakov; Planke, Sverre; Abdelmalak, Mansour M.; Polteau, Stéphane; Faleide, Jan Inge; Manton, Ben; Myklebust, Reidun.
In: Marine and Petroleum Geology, Vol. 115, 104269, 05.2020.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Regional structure and polyphased Cretaceous-Paleocene rift and basin development of the mid-Norwegian volcanic passive margin
AU - Zastrozhnov, Dmitry
AU - Gernigon, Laurent
AU - Gogin, Iakov
AU - Planke, Sverre
AU - Abdelmalak, Mansour M.
AU - Polteau, Stéphane
AU - Faleide, Jan Inge
AU - Manton, Ben
AU - Myklebust, Reidun
N1 - Publisher Copyright: © 2020 Elsevier Ltd
PY - 2020/5
Y1 - 2020/5
N2 - The Møre and Vøring basins of the mid-Norwegian volcanic passive margin are characterized by thick accumulations of Cretaceous to Paleocene sedimentary strata. They were formed during a series of Late Mesozoic-Early Cenozoic extensional events and represent vast underexplored areas with a limited number of wells. Recently, a new generation of long-offset 2D seismic reflection lines and 3D seismic data, together with new well data, has permitted a significant improvement in the regional understanding of the Møre and Vøring basins. This has enabled much better imaging of the deep Cretaceous subbasins and sub-basalt structures. In light of this significant data improvement, we performed a regional tectonostratigraphic synthesis of the pre-breakup development of the Møre and Vøring basins. We have interpreted eight regional Cretaceous and Paleocene horizons and constructed a series of structural and thickness maps. The new interpretations allow us to examine the sequential evolution of the Cretaceous to Paleocene sedimentary infill and to discuss its relationship to the deep crustal structures and regional tectonic events. We conclude that the long and polyphased development of the Møre and Vøring basins is partly controlled by deep-seated structural highs. We show that active deposition in the Early Cretaceous was mainly focused in the Møre Basin, while the main Cenomanian and subsequent Late Cretaceous-Paleocene depocentres developed principally in the Vøring Basin and migrated sequentially west towards the present continent-ocean boundary. We argue that the outer Møre and Vøring basins are likely underlain by a relatively thick continental crust compared to the inner part of the regional sag basin. In this setting our observations do not support evidence for a large zone of exhumed upper mantle, which has previously been proposed to have formed before magmatism and breakup.
AB - The Møre and Vøring basins of the mid-Norwegian volcanic passive margin are characterized by thick accumulations of Cretaceous to Paleocene sedimentary strata. They were formed during a series of Late Mesozoic-Early Cenozoic extensional events and represent vast underexplored areas with a limited number of wells. Recently, a new generation of long-offset 2D seismic reflection lines and 3D seismic data, together with new well data, has permitted a significant improvement in the regional understanding of the Møre and Vøring basins. This has enabled much better imaging of the deep Cretaceous subbasins and sub-basalt structures. In light of this significant data improvement, we performed a regional tectonostratigraphic synthesis of the pre-breakup development of the Møre and Vøring basins. We have interpreted eight regional Cretaceous and Paleocene horizons and constructed a series of structural and thickness maps. The new interpretations allow us to examine the sequential evolution of the Cretaceous to Paleocene sedimentary infill and to discuss its relationship to the deep crustal structures and regional tectonic events. We conclude that the long and polyphased development of the Møre and Vøring basins is partly controlled by deep-seated structural highs. We show that active deposition in the Early Cretaceous was mainly focused in the Møre Basin, while the main Cenomanian and subsequent Late Cretaceous-Paleocene depocentres developed principally in the Vøring Basin and migrated sequentially west towards the present continent-ocean boundary. We argue that the outer Møre and Vøring basins are likely underlain by a relatively thick continental crust compared to the inner part of the regional sag basin. In this setting our observations do not support evidence for a large zone of exhumed upper mantle, which has previously been proposed to have formed before magmatism and breakup.
KW - Basin evolution
KW - Hyperextension
KW - Mid-Norwegian margin
KW - Møre and Vøring basins
KW - NE Atlantic
KW - Passive margin
KW - Seismic interpretation
UR - http://www.scopus.com/inward/record.url?scp=85079273529&partnerID=8YFLogxK
U2 - 10.1016/j.marpetgeo.2020.104269
DO - 10.1016/j.marpetgeo.2020.104269
M3 - Article
AN - SCOPUS:85079273529
VL - 115
JO - Marine and Petroleum Geology
JF - Marine and Petroleum Geology
SN - 0264-8172
M1 - 104269
ER -
ID: 86064294