Evolution of the Oseberg fault-block in context of the northern north sea structural framework

Færseth, Roald B.; Ravnås, Rodmar

doi:10.1016/s0264-8172(97)00046-9

Cited by 64 publications

(75 citation statements)

References 29 publications

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“…Some authors utilizing high-quality 3D seismic reflection data in the East Shetland Basin in the northern North Sea argued that Triassic faults were largely crosscut and offset by oppositely dipping middle-late Jurassic faults, forming two generations of fault blocks tilted in opposite direction (Faerseth et al, 1997;Faerseth and Ravnas, 1998;. Hence, considerable uncertainties still exist regarding to the degree and nature of fault reactivation during the second rift phase in the northern North Sea rift.…”

Section: Analysis Of Subsurface and Field Datamentioning

confidence: 99%

“…The Oseberg area is located at the boundary between the Permian -Early Triassic and Middle JurassicEarly Cretaceous rift axis (Badley et al, 1984;Faerseth et al, 1997;Faerseth and Ravnas, 1998;, making it possible to study the faults related to both rift phases. The main goal is to understand the fault evolution and interaction between the two phases of rift-related faulting, and to explore what controls fault evolution in the Oseberg area and in multiphase rift basins in general.…”

Section: Introductionmentioning

confidence: 99%

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Influence of fault reactivation during multiphase rifting: The Oseberg area, northern North Sea rift

Deng

Fossen

Gawthorpe

et al. 2017

Marine and Petroleum Geology

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Section: Analysis Of Subsurface and Field Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of fault reactivation during multiphase rifting: The Oseberg area, northern North Sea rift

Deng

Fossen

Gawthorpe

et al. 2017

Marine and Petroleum Geology

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“…1) (Badley et al, 1984;Bell et al, 2014;Faerseth and Ravnas, 1998;Odinsen et al, 2000b;Roberts et al, 1993;Steel and Ryseth, 1990). Permian -Early Triassic rifting is generally assumed to have occurred during E-W extension, as indicated by the predominantly N-S-orientation of major basin bounding and intra-basinal faults.…”

Section: Geological Settingmentioning

confidence: 99%

“…2). In the Early to Middle Jurassic, a fluvio-deltaic to shallow marine succession was deposited in the upper part of the inter-rift package that includes the Statfjord, Dunlin and Brent Groups ( Faerseth and Ravnas, 1998;Helland-Hansen et al, 1992;Steel, 1993). The Middle Jurassic - Fig.…”

mentioning

confidence: 99%

“…Early Cretaceous syn-rift strata are generally made up of the marine Viking Group, including shallow marine clastic sequences of the Heather Formation (Dreyer et al, 2005;Faerseth and Ravnas, 1998) and deep marine mudstones of the Draupne Formation. However, in some places the initiation of Middle Jurassic -Early Cretaceous rifting coincides with the deposition of the upper part of the Brent Group (uppermost of Ness and Tarbert formations) (Helland-Hansen et al, 1992;Yielding et al, 1992).…”

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Influence of fault reactivation during multiphase rifting: the Oseberg area, Northern North Sea rift

Deng¹,

Fossen²,

Gawthorpe³

et al. 2017

Preprint

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Multiphase rifts tend to produce fault populations that evolve by the formation of new faults and reactivation of earlier faults. The resulting fault patterns tend to be complex and difficult to decipher. In this work we use seismic reflection data to examine the evolution of a normal fault network in the Oseberg Fault Block in the northern North Sea Rift System -a rift system that experienced Permian -Early Triassic and Middle Jurassic -Early Cretaceous rifting and exhibits N-S, NW-SE and NE-SW oriented faults.Both N-S-and NW-SE-striking faults were established during the Permian -Early

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Strain migration during multiphase extension: Observations from the northern North Sea

et al. 2014

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Many rifts develop through multiphase extension; it can be difficult, however, to determine how strain is distributed during reactivation because structural and stratigraphic evidence associated with earlier rifting is often deeply buried. Using 2-D and 3-D seismic reflection and borehole data from the northern North Sea, we examine the style, magnitude, and timing of reactivation of a preexisting, Permian-Triassic (Rift Phase 1) fault array during a subsequent period of Middle Jurassic to Early Cretaceous (Rift Phase 2) extension. We show that Rift Phase 2 led to the formation of new N-S striking faults close to the North Viking Graben but did not initially reactivate preexisting Rift Phase 1 structures on the Horda Platform. We suggest that at the beginning of Rift Phase 2, strain was focused in a zone of thermally weakened lithosphere associated with the Middle Jurassic North Sea thermal dome, rather than reactivating extant faults. Diachronous reactivation of the Permian-Triassic fault network eventually occurred, with those faults located closer to the Middle Jurassic to Early Cretaceous rift axis reactivating earlier than those toward the eastern margin. This diachroneity may have been related to flexural down bending as strain became focused within the North Viking Graben, and/or the shifting of the locus of rifting from the North Sea to the proto-North Atlantic. Our study shows that the geometry and evolution of multiphase rifts is not only controlled by the orientation of the underlying fault network but also by the thermal and rheological evolution of the lithosphere and variations in the regional stress field.

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Evolution of the Oseberg fault-block in context of the northern north sea structural framework

Cited by 64 publications

References 29 publications

Influence of fault reactivation during multiphase rifting: The Oseberg area, northern North Sea rift

Influence of fault reactivation during multiphase rifting: The Oseberg area, northern North Sea rift

Influence of fault reactivation during multiphase rifting: the Oseberg area, Northern North Sea rift

Strain migration during multiphase extension: Observations from the northern North Sea

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