Structural style and the habitat of hydrocarbons in the North Sea

Stewart, I. J.; Rattey, R. P.; Vann, I. R.

doi:10.1016/b978-0-444-88607-1.50018-8

Cited by 13 publications

(7 citation statements)

References 18 publications

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“…Other studies propose a consistent E-W extension direction between the rift events, implying that both sets of faults, which have different strikes, developed in response to the same overall regional stress regime (e.g. Roberts et al, 1990Roberts et al, , 1993Stewart et al, 1992;Bartholomew et al, 1993;Brun & Tron, 1993). We suggest that the NW-SEstriking, Late Jurassic-to-Early Cretaceous fault population observed in this study is unlikely to have formed in response to NW-SE extension because they appear to be dip-slip rather than strike-slip structures, which would be a kinematic requirement if they formed in response to NW-SE extension.…”

Section: Impact Of Structural Inheritance and Extension Direction On mentioning

confidence: 97%

“…Ziegler, 1990); it is these lineaments that acted as zones of crustal weakness, which imposed geometric constraints on both the evolution of the subsequent Mesozoic rift system and the locus of Cenozoic thermally driven subsidence (e.g. Glennie, 1987;Ziegler, 1990;Stewart et al, 1992;Bartholomew et al, 1993).…”

Section: Geological Setting North Sea Basinmentioning

confidence: 99%

“…Kinematic models for the Late Jurassic rift event in the northern North Sea Basin invoke either a continuation of the Permo-Triassic, E-W extension direction (e.g. Roberts et al, 1990Roberts et al, , 1993Stewart et al, 1992;Bartholomew et al, 1993;Brun & Tron, 1993) or a rotation of the extension direction to NW-SE or WNW-ESE (e.g. Ziegler, 1990;Faerseth, 1996;Dor e et al, 1997;Faerseth et al, 1997).…”

Section: Geological Setting North Sea Basinmentioning

confidence: 99%

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Normal fault array evolution above a reactivated rift fabric; a subsurface example from the northern Horda Platform, Norwegian North Sea

et al. 2014

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The impact of a pre‐existing rift fabric on normal fault array evolution during a subsequent phase of lithospheric extension is investigated using 2‐D and 3‐D seismic reflection, and borehole data from the northern Horda Platform, Norwegian North Sea. Two fault populations are developed: (i) a population comprising relatively tall (>2 km), N‐S‐striking faults, which have >1.5 km of throw. These faults are up to 60 km long, penetrate down into crystalline basement and bound the eastern margins of 6–15 km wide half‐graben, which contain >3 km of pre‐Jurassic, likely Permo–Triassic, but possibly Devonian syn‐rift strata; and (ii) a population comprising vertically restricted (<1 km), NW‐SE‐striking faults, which are more closely spaced (0.5–5 km), have lower displacements (30–100 m) and not as long (2–10 km) as those in the N–S‐striking population. The NW‐SE‐striking population typically occurs between the N‐S‐striking population, and may terminate against or cross‐cut the larger structures. NW–SE‐striking faults do not bound pre‐Jurassic half‐graben and are largely restricted to the Jurassic‐to‐Cretaceous succession. Seismic‐stratigraphic observations, and the stratigraphic position of the fault tips in both fault populations, allow us to reconstruct the Late Jurassic‐to‐Early Cretaceous growth history of the northern Horda Platform fault array. We suggest the large, N‐S‐striking population was active during the Permo–Triassic and possibly earlier (Devonian?), before becoming inactive and buried during the Early and Middle Jurassic. After a period of relative tectonic quiescence, the N‐S‐striking, pre‐Jurassic fault population propagated through the Early‐Middle Jurassic cover and individual fault systems rapidly (within <10 Ma) established their maximum length in response to Late Jurassic extension. These fault systems became the dominant structures in the newly formed fault array and defined the locations of the main, Late Jurassic‐to‐Early Cretaceous, syn‐rift depocentres. Late Jurassic extension was also accommodated by broadly synchronous growth of the NW‐SE‐striking fault population; the eventual death of this population occurred in response to the localization of strain onto the N–S‐striking fault population. Our study demonstrates that the inheritance of a pre‐existing rift fabric can influence the geometry and growth of individual fault systems and the fault array as a whole. On the basis of observations made in this study, we present a conceptual model that highlights the influence of a pre‐existing rift fabric on fault array evolution in polyphase rifts.

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Section: Impact Of Structural Inheritance and Extension Direction On mentioning

confidence: 97%

Section: Geological Setting North Sea Basinmentioning

confidence: 99%

Section: Geological Setting North Sea Basinmentioning

confidence: 99%

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Normal fault array evolution above a reactivated rift fabric; a subsurface example from the northern Horda Platform, Norwegian North Sea

et al. 2014

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“…+ -K4-+ + + + + + + + + + + + + ++X + -K+A + + + + + + + v + + y+++ + ^ + + + + + + + + ? v ± + + + + + + + + + + + + + + + + + + + + + + + v + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +y+ + +++< + + + + + + + + + +!>>*<,;!-+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + ^ 20 km (Stewart et al 1992); (C): Balkwill and Legall (1989). Note the lack of correlation in location, fault throw, or diapir height between overburden faults and basement faults.…”

Section: -mentioning

confidence: 96%

“…However, seismic sections in many such basins (e.g. Balkwill and Legall 1989;Stewart et al 1992;Penge et al 1993;Fig. 1) show no convincing correlation in terms of fault spacing, location, and throw between basement and sediment overburden, except for basin-bounding faults where salt has been depleted above at least one of the fault blocks.…”

Section: Introductionmentioning

confidence: 94%

Scale models of salt tectonics during basement-involved extension

Vendeville

Jackson

1995

129

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Scaled experiments, w h o s e design was based on recently published low values for the viscosity of natural rocksalt, suggest that under typically low geological extension rates, a salt layer 500 m thick or thicker decouples the brittle overburden from the faulted basement. Because of its low viscosity, salt cannot transmit the large differential stresses necessary for basement faults to propagate upward as faults or abrupt forced folds into the brittle overburden, unless the salt layer is thin or has b e e n depleted. Thick salt diffuses localized deformation in the basement by flowing away from rising basement blocks, and toward sinking basement blocks. Basement extension is not transmitted to the overburden vertically but is laterally transmitted from the margins as the salt basin widens. Rather than being controlled by basement faults, the distribution of faults and diapirs in the overburden is controlled by lateral changes in overburden stratigraphy or thickness, preexisting faults, and faults that propagate laterally into the salt basin.

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Petroleum exploration in the Ula Trend

Bjørnseth

Gluyas²

1995

Norwegian Petroleum Society Special Publications

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Structural style and the habitat of hydrocarbons in the North Sea

Cited by 13 publications

References 18 publications

Normal fault array evolution above a reactivated rift fabric; a subsurface example from the northern Horda Platform, Norwegian North Sea

Normal fault array evolution above a reactivated rift fabric; a subsurface example from the northern Horda Platform, Norwegian North Sea

Scale models of salt tectonics during basement-involved extension

Petroleum exploration in the Ula Trend

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