The Guinea continental margin: an example of a structurally complex transform margin

Benkhelil, J.; Mascle, J.; Tricart, Pierre

doi:10.1016/0040-1951(94)00246-6

Cited by 59 publications

(66 citation statements)

References 19 publications

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“…This lower and older surface would be topped by a younger surface (700-800 m in altitude) of Aptian age. By contrast, in the Guinea continental margin, incipient post-rift (post-Middle Albian to preLate Cenomanian) structural inversion occurred (Benkhelil et al, 1995). These differences in tectonic styles are now explained by different response of previous structures to post-rift stress fields.…”

Section: Establishing the Research Frameworkmentioning

confidence: 73%

Late Pleistocene tectonic-geomorphological development within a passive margin — The Cariatá trough, northeastern Brazil

et al. 2008

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Section: Establishing the Research Frameworkmentioning

confidence: 73%

Late Pleistocene tectonic-geomorphological development within a passive margin — The Cariatá trough, northeastern Brazil

et al. 2008

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“…During the Early Cretaceous, at the time of fast subsidence on the Guinea margin and Guinea plateau (Flicoteaux et al, 1988), the future Guinea fracture zone acted as a transform continental boundary (Benkhelil et al, 1995). Downwarping of the margin was coeval with the prolonged phase of Early Cretaceous rhexistatic mechanical erosion (Michel, 1973) that contributed to onshore denudation during continuous upwarping of the Fouta Djalon.…”

Section: Two (Post-gondwana African) Stepped Surfaces Modelmentioning

confidence: 99%

Planation, bauxites and epeirogeny: One or two paleosurfaces on the West African margin?

et al. 2006

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“…Large-scale transpressional inversion structures (E-W folds and obliquereverse faults shown in red on the map) affect the southern margin of the Guinea plateau (Benkhelil et al, 1995) and that of its South American counterpart (the Demerara plateau; Gouyet, 1988;Sapin et al, 2016;Fig. 7).…”

Section: Valanginian (140-133 Ma): Pre-rift Configuration (Figure 6)mentioning

confidence: 99%

“…Shortening also affects intracontinental South America, forming several EW-and NS-trending arches along sedimentary basin margins (de Almeida et al, 1981;Soares Júnior et al, 2008). Middle Aptian inversion Ye et al | Evolution of northwestern Africa and its Atlantic margins GEOSPHERE | Volume 13 | Number 4 along the future Guinea transform was interpreted by Benkhelil et al (1995) as an adjustment in plate kinematics. This inversion event is recorded on a very large scale all along the Central Atlantic margins (so-called "Austrian phase").…”

Section: Valanginian (140-133 Ma): Pre-rift Configuration (Figure 6)mentioning

confidence: 99%

Paleogeographic and structural evolution of northwestern Africa and its Atlantic margins since the early Mesozoic

Chardon

Rouby

et al. 2017

Geosphere

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The geological evolution of northwestern Africa and its continental margins is investigated in the light of nine Meso-Cenozoic paleogeological maps, which integrate original minimal extent of sedimentary deposits beyond their present-day erosional limits. Mapping is based on a compilation of published original data on the stratigraphy and depositional environments of sediments, structures, magmatism, and low-temperature thermochonology, as well as on the interpretation of industrial seismic and borehole data.We show that rifting of the equatorial domain propagated eastward from the Central Atlantic between the Valanginian (ca. 140 Ma) and the Aptian (ca. 112 Ma) as an en echelon strike-slip and rift system connected to an inland rift network. This network defines a six-microplate synrift kinematic model for the African continental domain. We document persistent, long-wavelength eroding marginal upwarps that supplied clastic sediments to the offshore margin basins and a large intracratonic basin. The latter acted as a transient sediment reservoir because the products of its erosion were transferred both to the Tethys (to the north) and the Atlantic Ocean. This paired marginal upwarpintra cratonic basin source-to-sink system was perturbed by the growth of the late Paleogene Hoggar hotspot swell that fragmented the intracratonic basins into five residual depocenters. By linking the evolution of the continental margins to that of their African hinterland, this study bears important implications for the interplay of long-wavelength deformation and sediment transfers over paired shield-continental margin systems.

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The Guinea continental margin: an example of a structurally complex transform margin

Cited by 59 publications

References 19 publications

Late Pleistocene tectonic-geomorphological development within a passive margin — The Cariatá trough, northeastern Brazil

Late Pleistocene tectonic-geomorphological development within a passive margin — The Cariatá trough, northeastern Brazil

Planation, bauxites and epeirogeny: One or two paleosurfaces on the West African margin?

Paleogeographic and structural evolution of northwestern Africa and its Atlantic margins since the early Mesozoic

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