Salt tectonics in the North Sea Basin: a structural style template for seismic interpreters

Stewart, Simon

doi:10.1144/gsl.sp.2007.272.01.19

Cited by 89 publications

(110 citation statements)

References 92 publications

Supporting

Mentioning

104

Contrasting

Order By: Relevance

“…Locally, salt tectonics started as early as the latest Permian (Stewart 2007) but became more widespread during the Early Triassic, leading to the formation of minibasins and rafts (Stewart & Clark 1999;Penge et al 1999). In the Dutch sector, such Early Triassic salt-controlled minibasins are rare and only observed in the A Block (insert map, Fig.…”

Section: Salt Tectonicsmentioning

confidence: 99%

Tectonostratigraphy of a rift basin affected by salt tectonics: synrift Middle Jurassic–Lower Cretaceous Dutch Central Graben, Terschelling Basin and neighbouring platforms, Dutch offshore

Bouroullec

Verreussel

Geel

et al. 2018

View full text Add to dashboard Cite

The Middle Jurassic-Lower Cretaceous in the eastern Dutch offshore provides excellent examples of sand-rich sediments that locally accumulated in the vicinity of rift basin margins affected by salt tectonics. These types of deposits are often geographically restricted and difficult to identify, but can be valuable targets for hydrocarbon exploration. The distribution, thickness and preservation potential of fluvio-lacustrine, shallow-and deep-marine sediments is discussed to provide new insights into the regional and local tectonostratigraphy of the Dutch Central Graben, the Terschelling Basin and their neighbouring platforms. New sedimentological, geochemical, biostratigraphic, stratigraphic and structural information have been analysed and integrated into a new tectonostratigraphic model for the Callovian Lower Graben Formation, Oxfordian Middle and Upper Graben formations, Early-Middle Volgian Terschelling Sandstone and Noordvaarder members, and the Late VolgianEarly Ryazanian Scruff Greensand Formation. It is demonstrated that salt withdrawal at the basin axis was the primary control on the generation of high accommodation during the Callovian-Early Kimmeridgian. Incised valleys developed on the platforms providing lateral sediment input. During the Late Kimmeridgian-Ryazanian salt migration shifted laterally towards the basin margins, providing accommodation adjacent to active salt bodies and deposition of overthickened sandy strata.

show abstract

Section: Salt Tectonicsmentioning

confidence: 99%

Tectonostratigraphy of a rift basin affected by salt tectonics: synrift Middle Jurassic–Lower Cretaceous Dutch Central Graben, Terschelling Basin and neighbouring platforms, Dutch offshore

Bouroullec

Verreussel

Geel

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Although the controls on the external morphology of natural salt diapirs are relatively welldocumented and understood (e.g. Talbot, 1986, 1991;Vendeville and Jackson, 1992;Koyi, 1998;Davison et al, 2000;Jackson, 2007, 2011;Stewart, 2007), considerably less is known about their internal structure and kinematics for four key reasons: (i) well-exposed, natural salt diapirs are rare because halite, a key component of many salt structures, is highly soluble and dissolves, whereas anhydrite, upon contact with water, converts to gypsum, leaving a karstic soil or crust that masks the diapir's internal structure (Jackson et al, 1990;Bruthans et al, 2009); (ii) the internal structure of exposed diapirs can be strongly deformed by gravity spreading of salt extruding at the Earth's surface (Talbot and Jackson, 1987;Talbot, 1998;Talbot and Aftabi, 2004); (iii) even where diapirs are well exposed at the Earth's (Jackson et al, 1990). The intrasalt stratigraphy here is similar to that in the Santos Basin, with massive halite-dominated sequences being overlain by impure, interlayered evaporites (see Fig.…”

Section: Introductionmentioning

confidence: 99%

Enigmatic structures within salt walls of the Santos Basin—Part 1: Geometry and kinematics from 3D seismic reflection and well data

Jackson¹,

Jackson²,

Hudec³

et al. 2015

Journal of Structural Geology

151

View full text Add to dashboard Cite

a b s t r a c tUnderstanding intrasalt structure may elucidate the fundamental kinematics and, ultimately, the mechanics of diapir growth. However, there have been relatively few studies of the internal structure of salt diapirs outside the mining industry because their cores are only partly exposed in the field and poorly imaged on seismic reflection data. This study uses 3D seismic reflection and borehole data from the São Paulo Plateau, Santos Basin, offshore Brazil to document the variability in intrasalt structural style in natural salt diapirs. We document a range of intrasalt structures that record: (i) initial diapir rise; (ii) rise of lower mobile halite through an arched and thinned roof of denser, layered evaporites, and emplacement of an intrasalt sheet or canopy; (iii) formation of synclinal flaps kinematically linked to emplacement of the intrasalt allochthonous bodies; and (iv) diapir squeezing. Most salt walls contain simple internal anticlines. Only a few salt walls contain allochthonous bodies and breakout-related flaps. The latter occur in an area having a density inversion within the autochthonous salt layer, such that upper, anhydrite-rich, layered evaporites are denser than lower, more halite-rich evaporites. We thus interpret that most diapirs rose through simple fold amplification of internal salt stratigraphy but that locally, where a density inversion existed in the autochthonous salt, RayleigheTaylor overturn within the growing diapir resulted in the ascent of less dense evaporites into the diapir crest by breaching of the internal anticline. This resulted in the formation of steep salt-ascension zones or feeders and the emplacement of high-level intrasalt allocthonous sheets underlain by breakout-related flaps. Although regional shortening undoubtedly occurred on the São Paulo Plateau during the Late Cretaceous, we suggest this was only partly responsible for the complex intrasalt deformation. We suggest that, although based on the Santos Basin, our kinematic model may be more generally applicable to other salt-bearing sedimentary basins.

show abstract

“…Jackson and Cramez, 1989), offshore Brazil (Quirk et al, 2012) and offshore Angola (Duval et al, 1992;Jackson 1992a, 1992b;Jackson et al, 1994), and has been supported by modelling studies (Vendeville et al, 1987). Halokinesis and dissolution-driven pod formation has been described for tectonically-confined Triassic basins in the UK North Sea Central Graben (for example Hodgson et al, 1992;Smith et al, 1993;Stewart, 2007;Goldsmith et al, 2003).…”

Section: Influence Of Halokinesismentioning

confidence: 77%

Petroleum Geology and Hydrocarbon Potential of the Adriatic Basin, Offshore Croatia

Wrigley¹,

Hodgson²,

Esestime³

2015

Journal of Petroleum Geology

View full text Add to dashboard Cite

show abstract

Salt tectonics in the North Sea Basin: a structural style template for seismic interpreters

Abstract: The North Sea Basin contains a widespread Permian salt layer that reached a depositional thickness ofc.

Cited by 89 publications

References 92 publications

Tectonostratigraphy of a rift basin affected by salt tectonics: synrift Middle Jurassic–Lower Cretaceous Dutch Central Graben, Terschelling Basin and neighbouring platforms, Dutch offshore

Tectonostratigraphy of a rift basin affected by salt tectonics: synrift Middle Jurassic–Lower Cretaceous Dutch Central Graben, Terschelling Basin and neighbouring platforms, Dutch offshore

Enigmatic structures within salt walls of the Santos Basin—Part 1: Geometry and kinematics from 3D seismic reflection and well data

Petroleum Geology and Hydrocarbon Potential of the Adriatic Basin, Offshore Croatia

Contact Info

Product

Resources

About