Rifting and subsidence on passive continental margins in the North East Atlantic

Montadert, L.; Roberts, D.G.; Auffret, Gérard-André; Bock, Wayne D.; Dupeuble, Pierre‐Alain; Hailwood, E. A.; Harrison, William; Kagami, Hideo; Lumsden, David N.; Müller, Carla; Schnitker, Detmar; Thompson, Robert Wayne; Thompson, T. L.; Timofeev, Pyotr P

doi:10.1038/268305a0

Cited by 49 publications

(39 citation statements)

References 20 publications

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“…In both cases, the subsidence was not accomplished by faulting because the post-rift sediments are only rarely affected by faults. The post-rift subsidence took place largely by oceanward tilting of the margin without decoupling of the continental and oceanic crust (Montadert, Roberts, et al, 1977;Montadert et al, this volume, Roberts et al, this volume).…”

Section: Rifting and Subsidencementioning

confidence: 99%

Evolution of Passive Rifted MarginsPerspective and Retrospective of DSDP Leg 48

Roberts¹,

Montadert²

1979

Initial Reports of the Deep Sea Drilling Project

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Section: Rifting and Subsidencementioning

confidence: 99%

Evolution of Passive Rifted MarginsPerspective and Retrospective of DSDP Leg 48

Roberts¹,

Montadert²

1979

Initial Reports of the Deep Sea Drilling Project

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“…These early results showed that the observed thinning of the crust could not be fully explained by the extension of lO-15% in the upper crust and resulted in the suggestion that the lower ductile had thinned by a greater amount (De Charpal et al, 1978; r Montadert et al, 1979). The drill, dredge and reflection data / suggested that at the end of rifting a system of half-graben about 2.5 km below sea level existed adjacent to the continent-ocean transition (Montadert, Roberts et al, 1977. After rifting regional subsidence took place in response to cooling of the lithosphere of which the continental crustal part had been thinned during the rifting process.…”

mentioning

confidence: 99%

“…-Rifting apparently took place in Late Jurassic-Early Cretaceous time in a pre-existing marine basin and was completed by Late Aptian time (Montadert, Roberts et al, 1977;Montadert et al , 1979). -The overall tectonic style consists of tilted and rotated fault blocks whose downthrow is consistently down toward the ocean.…”

Section: Introductionmentioning

confidence: 99%

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A seismic refraction and reflection study of the continent-ocean transition beneath the north Biscay margin

1982

Deep Sea Research Part B. Oceanographic Literature Review

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(Ziegler, 1978 and this volume) and the adjacent margins of the North Atlantic Ocean.It has become clear that extension may also occur in strike slip and convergent settings (Bally & Snelson, 1979), and examples include the Western Mediterranean (Biju-Duval et al., 1977) , the Pannonian Basin (Royden & Sclater, 1981) and the Great Basin (Profett, 1977).The occurrence of crustal extension, expressed by rifting, in these different geological settings emphasises that very little is known of the mechanisms producing the rifting process, including its initiation, which cause the profound changes in crustal structure revealed by attenuation and ultimately by the formation of a spreading ocean basin. . "Several innovative theoretical models (McKenzie, 1978;Royden et al., 1980;Royden and Keen, 1980; Sclater & Christie, 1981;Turcotte, 1981) have proposed mechanisms for lithospheric extension and have attempted to evaluate quantitatively the mechanical and thermal consequences of each model in terms of histories of margin and basin subsidence. These models may have a potential practical value in predicting the thermal history and thus the degree of.hydrocarbon maturity in sedimentary basins formed in response to a lithospheric extension (Royden & Keen, 1980;Royden et al., 1980;Sclater & Christie, 1980). However, a rigorous description of the deep crustal structure beneath a cratonic sedimentary basin or a passive continental margin that would provide sufficient data to quantify the extension in order to constrain these models has been lacking as has a comprehensive study of the geological and thermal history of basins that have evolved in response to lithospheric extension.In this paper, we present some of the results of a detail seismic refraction and reflection study of the northern or Armorican margin of the Bay of Biscay. The study examined the deep crustal structure (Montadert, Roberts et al., 1977;Montadert et al. , 1979). -The overall tectonic style consists of tilted and rotated fault blocks whose downthrow is consistently down toward the ocean. The pattern of faults is probably en-echelon or anastomosing. Many of the fault blocks are bounded by listric normal faults ( Fig. 2a) with throws of up to 3000 m. The listric faults flatten out with depth close to the top of a sub-horizontal group of reflectors called 'S' (Fig. 2b). Comparison with early refraction data suggested that this reflector corresponded to the boundary between a 4.9 and 6.3 km.sec ^ layer (Avedik & Howard, 1979). De Charpal et al. (1979 and Montadert et al. (1979) interpreted the 6.3 km. sec ^ refractor as the boundary between the upper brittle and the lower ductile continental crust. Refraction data on the shelf (Holder & Bott, 1971) suggested that the Moho shoaled from 25 km beneath the shelf break to 12 km near the continent-ocean transition where, from the available refraction data, the observed ductile crust was estimated to be only 3 km -2-in thickness. These early results showed that the observed thinning of the crust could not be ful...

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“…The sedimentary successions of a passive continental margin may reach thicknesses in the order of 14 kilometers and accumulate during and after the continental rifting and the formation of oceanic lithosphere. In a well-developed Atlantic-type continental margin, a continental shelf, continental slope and rise and basin occur [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Introductory Chapter: An Introduction to the Seismic and Sequence Stratigraphy and to the Integrated Stratigraphy: Concepts and Meanings

Aiello¹

2017

Seismic and Sequence Stratigraphy and Integrated Stratigraphy - New Insights and Contributions

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Rifting and subsidence on passive continental margins in the North East Atlantic

Cited by 49 publications

References 20 publications

Evolution of Passive Rifted MarginsPerspective and Retrospective of DSDP Leg 48

Evolution of Passive Rifted MarginsPerspective and Retrospective of DSDP Leg 48

A seismic refraction and reflection study of the continent-ocean transition beneath the north Biscay margin

Introductory Chapter: An Introduction to the Seismic and Sequence Stratigraphy and to the Integrated Stratigraphy: Concepts and Meanings

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Rifting and subsidence on passive continental margins in the North East Atlantic

Cited by 49 publications

References 20 publications

Evolution of Passive Rifted MarginsPerspective and Retrospective of DSDP Leg 48

Evolution of Passive Rifted MarginsPerspective and Retrospective of DSDP Leg 48

A seismic refraction and reflection study of the continent-ocean transition beneath the north Biscay margin

Introductory Chapter: An Introduction to the Seismic and Sequence Stratigraphy and to the Integrated Stratigraphy: Concepts and Meanings

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Product

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Evolution of Passive Rifted MarginsPerspective and Retrospective of DSDP Leg 48

Evolution of Passive Rifted MarginsPerspective and Retrospective of DSDP Leg 48