Skagerrak Graben—the offshore continuation of the Oslo Graben

Ro, H.E.; Stuevold, Liv M.; Faleide, Jan Inge; Myhre, Annik M.

doi:10.1016/0040-1951(90)90456-i

Cited by 40 publications

(18 citation statements)

References 6 publications

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“…Such a correlation of strike-slip fault activity in the study area with phases of Paleozoic deformation along the Tornquist Zone suggests that the Oslo Region remained widely unaffected by any major tectonic activity for much of the Mesozoic and Cenozoic. Such a tectonic quiescence, in turn, agrees with findings from the Skagerrak Graben of which the Mesozoic and Cenozoic cover sediments do not show any significant signs of deformation (Lie and Andersson, 1998;Ro et al, 1990). In any case, post Paleozoic deformation events have not been intense enough to overprint much of the older signs of deformation in the Oslo Region.…”

Section: The Oslo Graben Area and Its Relations To The Central Europesupporting

confidence: 86%

Paleostress field reconstruction in the Oslo region

Sippel¹,

Saintot²,

Heeremans³

et al. 2010

Marine and Petroleum Geology

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Section: The Oslo Graben Area and Its Relations To The Central Europesupporting

confidence: 86%

Paleostress field reconstruction in the Oslo region

Sippel¹,

Saintot²,

Heeremans³

et al. 2010

Marine and Petroleum Geology

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“…The Skagerrak Graben was inactive throughout the Jurassic and was furthermore decoupled from the STZ at this time (Ro et al, 1990); accordingly, localised extension along the Skagerrak Graben could not have driven the observed strike-slip activity. The influence of the Mid North Sea thermal dome was felt in the Farsund Basin during the Early-Middle Jurassic and associated stresses would be localised south of, and potentially buffered 565 by, the STZ (Underhill and Partington, 1993) (Fig.…”

mentioning

confidence: 90%

“…Variscan orogenesis drove regional N-S-directed shortening in the Carboniferous-to-Permian, resulting in the formation of a W-to NWtrending strike-slip system, incorporating the W-trending Fjerritslev Faults (Skjerven et al, 1983), in addition to several N-to NE-trending structures such as the Varnes and Skagerrak grabens, situated north and east of the study area respectively (Fig. 1a) (Ro et al, 1990;Lassen 140 and Thybo, 2012).…”

Section: Regional Geological Historymentioning

confidence: 99%

“…1a). Furthermore, to the east, NE-SW and NW-SE striking faults occur in the Skagerrak Graben and along the eastern part of the STZ respectively (Ro et al, 1990;Mogensen and Jensen, 1994) (Fig. 1a).…”

mentioning

confidence: 99%

“…Potential regional driving mechanisms during the Early-Middle Jurassic include: i) localised extension north of the STZ within the Skagerrak Graben (Ro et al, 1990;Vejbaek, 1990); ii) regional stresses relating to the inflation of the Mid North Sea thermal dome (Rattey and Hayward, 1993;Underhill and Partington, 1993); or iii) far-field stresses relating to the opening of the…”

mentioning

confidence: 99%

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Oblique reactivation of lithosphere-scale lineaments controls rift physiography – The upper crustal expression of the Sorgenfrei-Tornquist Zone, offshore southern Norway

Phillips¹,

Jackson²,

Bell³

et al. 2017

Preprint

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Abstract. Pre-existing structures within sub-crustal lithosphere may localise stresses during subsequent tectonic events, resulting in complex fault systems at upper crustal levels. As these sub-crustal structures are difficult to resolve at great depths, the evolution of kinematically and perhaps geometrically linked upper-crustal fault populations can offer insights into their deformation history, including when and how they reactivate and accommodate stresses during later tectonic events. In this study, we use borehole-constrained 2D and 3D 15seismic reflection data to investigate the structural development of the Farsund Basin, offshore southern Norway; this E-trending basin represents the upper crustal expression of the Sorgenfrei-Tornquist Zone, a major lithosphere-scale lineament extending >1000 km across Central Europe. The southern margin of the Farsund Basin is characterised by N-S and E-W-striking fault populations, the latter extending down through the Moho and potentially linking with the Sorgenfrei-Tornquist Zone as imaged within sub-crustal lithosphere. Due to this 20 geometric linkage, we can analyse the upper crustal fault populations to infer the kinematics of the SorgenfreiTornquist Zone. We use throw-length (T-x) analysis and fault displacement backstripping techniques to determine the geometric and kinematic evolution of upper-crustal fault populations during the multiphase evolution of the Farsund Basin. We document a period of sinistral strike-slip activity along E-W-striking faults during the Early Jurassic, representing a hitherto undocumented phase of activity along the Sorgenfrei-Tornquist 25Zone. These E-W-striking upper-crustal faults are later obliquely reactivated under a dextral stress regime during the Early Cretaceous, with new faults also propagating away from pre-existing ones, representing a switch to a phase of dextral transtension along the Sorgenfrei-Tornquist Zone. We show that the SorgenfreiTornquist Zone represents a long-lived lithosphere-scale lineament that is periodically reactivated throughout its protracted geological history. The upper crustal component of the lineament is reactivated in a range of tectonic 30 styles, including both sinistral and dextral strike-slip motions, with the geometry and kinematics of these faults often inconsistent with what may otherwise be inferred from regional tectonics alone. Understanding these different styles of reactivation not only allows us to better understand the influence of sub-crustal lithospheric structure on rifting, but also offers insights into the prevailing stress field during regional tectonic events. 35Solid Earth Discuss., https://doi

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Study of seismic tomography in Panxi paleorift area of southwestern China

Liu

et al. 2001

Sci. China Ser. D-Earth Sci.

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Skagerrak Graben—the offshore continuation of the Oslo Graben

Cited by 40 publications

References 6 publications

Paleostress field reconstruction in the Oslo region

Paleostress field reconstruction in the Oslo region

Oblique reactivation of lithosphere-scale lineaments controls rift physiography – The upper crustal expression of the Sorgenfrei-Tornquist Zone, offshore southern Norway

Study of seismic tomography in Panxi paleorift area of southwestern China

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