Pan-African tectonic evolution and glacial events registered in Neoproterozoic to Cambrian cratonic and foreland basins of West Africa

Deynoux, Max; Affaton, Pascal; Trompette, Roland; Villeneuve, Michel

doi:10.1016/j.jafrearsci.2006.08.005

Cited by 144 publications

(79 citation statements)

References 111 publications

(164 reference statements)

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“…It consists of three disconformable subdivisions which are well presented in northern Togo as Dapaong, Fosse-aux-Lions and Yemboure groups (Deynoux et al, 2006). The lower Tossiegou formation (Affaton et al, 1980) overlies the basement crystalline rocks in the north (Figure 1) and this formation dips southwards taking it beneath the Poubogou formation (Carney et al, 2010).…”

Section: Geological Settingsmentioning

confidence: 97%

Sedimentary facies and depositional environments of the neoproterozoic sediments of the Gambaga-Nakpanduri massifs, Voltaian Basin

Abu¹

2018

J. Geol. Min. Res.

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The classification of the sediments into facies and the various environments in which the sediments of the northeastern Voltaian basin were deposited has not been clearly described. Using detailed field mapping together with petrographic studies, six sedimentary facies has been identified; F1 is defined by asymmetric wave formed ripple marks, F2 indicates flute casts on micaceous sandy shales, F3 has bifurcated ripple and climbing ripple marks on argillaceous materials at the middle parts of the scarp, F4 is identified by parallel and cross stratifications observed close to the upper parts of the scarp, F5 has a bipolar herringbone cross beds and planar cross beds on quartz rich sediments at the southern parts of the study area and a distinctive well developed burrows (Skolithos) at the southern half of the study area defines facies F6. The sediments are deposited largely in a shallow marine environment, with subordinate fluvial, flood plain, deltaic, aeolian, tidal flats and shoreface/nearshore environments. Although, there exist a suitable depositional environment for the formation of hydrocarbons, the overlying sediments are not thick enough to give the required temperature and pressure conditions for hydrocarbons development in the northeastern fringes of the basin. Paleosol features evident by pseudokarren, like weathering marking the contact between the middle Oti/Pendjari group and the lower Gambaga group of the study area. The sequence of the area is that of a typical shallowing, thickening and coarsening upward sequence.

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Section: Geological Settingsmentioning

confidence: 97%

Sedimentary facies and depositional environments of the neoproterozoic sediments of the Gambaga-Nakpanduri massifs, Voltaian Basin

Abu¹

2018

J. Geol. Min. Res.

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“…The upper megasequence or Tamale Supergroup, with a possible lower Palaeozoic age, consists of conglomeratic formations with glaciogenic deposit. The Tamale Supergroup is a molasse derived from the uplift and consecutive rapid erosion of the adjacent Dahomeyide Orogeny [7,25].…”

Section: The Stable Zonementioning

confidence: 99%

“…Structurally, the lower and middle megasequences show significant eastward thickening in the Volta Basin where they are folded and partially incorporated into the frontal units of the Pan-African Dahomeyide Orogenic Belt [8][9][10]25]. According to Affaton [7], the associated structural and geophysical characteristics indicate a composite geodynamic evolution.…”

Section: The Stable Zonementioning

confidence: 99%

Pan-African Paleostresses and Reactivation of the Eburnean Basement Complex in Southeast Ghana (West Africa)

Tairou

Affaton

Anum

et al. 2012

Journal of Geological Research

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This faulting tectonics analysis concerns the southernmost segment of the Dahomeyide Orogen and the West-African craton eastern margin in southeast Ghana. The analysis of strike-slip faults in the frontal units of the Dahomeyide Belt indicates that four distinct compressive events (NE-SW, ENE-WSW to E-W, ESE-WNW to SE-NW and SE-NW to SSE-NNW) originated the juxtaposition of the Pan-African Mobile Zone and the West-African craton. These paleostress systems define a clockwise rotation of the compressional axis during the structuring of the Dahomeyide Orogen (650-550 Ma). The SE-NW and SSE-NNW to N-S compressional axes in the cratonic domain and its cover (Volta Basin) suggest that the reactivation of the eastern edge of the West African craton is coeval with the last stages of the Pan-African tectogenesis in southeast Ghana. An extensional episode expressed as late normal faulting is also recorded in this study. This E-W to SE-NW extension, which is particular to the southernmost part of the Dahomeyide Belt, appears to be post-Pan-African. This extension probably contributed to the formation of a major Jurassic rifting zone that originated the Central Atlantic and the Benue Trough.

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“…Moussine-Pouchkine & Bertrand-Sarfati 1997). The outcrops at the SW end of this belt, in the Atar Region, are relatively well known, and there are comprehensive and accurate regional geological maps and sections available in the public domain (Deynoux et al 2006). The Neoproterozoic -Early Cambrian succession is well defined and reasonably well dated radiometrically (Deynoux et al 2006).…”

Section: Neoproterozoic and Lower Palaeozoic Geology Of The Peri-gondmentioning

confidence: 99%

“…The outcrops at the SW end of this belt, in the Atar Region, are relatively well known, and there are comprehensive and accurate regional geological maps and sections available in the public domain (Deynoux et al 2006). The Neoproterozoic -Early Cambrian succession is well defined and reasonably well dated radiometrically (Deynoux et al 2006). It consists of a uniformly east-dipping succession of 'Pre-glacial' sediments, ranging from approximately 1000 Ma to somewhat younger than 775 Ma, unconformably overlain by a subhorizontal succession of younger Neoproterozoic sediments with, at the base, a glacigenic sequence including diamictites.…”

Section: Neoproterozoic and Lower Palaeozoic Geology Of The Peri-gondmentioning

confidence: 99%

Global Neoproterozoic petroleum systems: the emerging potential in North Africa

Craig

Thurow

Thusu

et al. 2009

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Abstract:The Neoproterozoic Eon is relatively poorly known from a petroleum perspective, despite the existence of producing, proven and potential plays in many parts of the world. In tectonic, climatic and petroleum systems terms, the Neoproterozoic to Early Cambrian period can be divided into three distinct phases: a Tonian to Early Cryogenian phase, prior to about 750 Ma, dominated by the formation, stabilization and initial break-up of the supercontinent of Rodinia; a mid Cryogenian to Early Ediacaran phase (c. 750-600Ma) including the major global-scale 'Sturtian' and 'Marinoan' glaciations and a mid Ediacaran to Early Cambrian (c. post 600Ma) phase corresponding with the formation and stabilization of the Gondwana Supercontinent. There is increasing evidence that deposition of many mid to late Neoproterozoic (to Early Palaeozoic) organic-rich units was triggered by strong post-glacial sea level rise on a global scale, following the 'Snowball Earth' type glaciations, coupled with basin development and rifting on a more local scale.Fieldwork in North Africa including the Taoudenni Basin in Mauritania, Algeria and Mali; the Anti-Atlas region of Morocco and the Cyrenaica, Kufra and Murzuk basins in Libya has added to the understanding of reservoir, source and seal relationships and confirmed the widespread presence of Precambrian stromatolitic carbonate units of potential reservoir facies. Current research on the chronostratigraphy, distribution and quality of source rocks, controls on reservoir quality and distribution of seals in the Precambrian-Early Cambrian hydrocarbon plays throughout South America, North Africa, the Middle East and the Indian Subcontinent is documented in this Special Publication.

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Pan-African tectonic evolution and glacial events registered in Neoproterozoic to Cambrian cratonic and foreland basins of West Africa

Cited by 144 publications

References 111 publications

Sedimentary facies and depositional environments of the neoproterozoic sediments of the Gambaga-Nakpanduri massifs, Voltaian Basin

Sedimentary facies and depositional environments of the neoproterozoic sediments of the Gambaga-Nakpanduri massifs, Voltaian Basin

Pan-African Paleostresses and Reactivation of the Eburnean Basement Complex in Southeast Ghana (West Africa)

Global Neoproterozoic petroleum systems: the emerging potential in North Africa

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