Results 181 to 190 of about 24,581 (234)
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Pan-African Orogeny in Northern Nigeria
Geological Society of America Bulletin, 1971An area of approximately 12,000 sq km of Precambrian to lower Paleozoic rocks around Zaria in northern Nigeria has recently been mapped for the first time. Results from this survey have been combined with limited data from adjacent areas to determine the nature of the Pan-African event in this part of Nigeria.
P. Mccurry
semanticscholar +2 more sources
Plate Tectonics and the Pan-African Orogeny in Nigeria
Nature Physical Science, 1971FITCHES1 has convincingly demonstrated the relative insignificance of the Pan-African orogeny in a part of coastal Ghana. He disputes the importance of this orogeny elsewhere in West Africa, however (Fitches, personal communication), as implied in his Fig. 1b of ref. 1, which shows no change in tectonic style eastwards.
P. Mccurry
semanticscholar +2 more sources
Provenance of the lower Cambrian Khewra Sandstone: Implications for Pan-African Orogeny
Sedimentary Geology, 2022Shoukat H Khan +5 more
semanticscholar +2 more sources
Journal of Geodynamics, 2016
We report new mapping, tectonic, metamorphic and U–Pb zircon dating data on the polyphased Tachakoucht–Iriri and Tourtit arc-related units within the Moroccan Pan-African belt (Sirwa window, Anti-Atlas). The studied area contains four different sub-units, from south to north: (1) the Tachakoucht gneisses intruded to its northern part by (2) Iriri ...
A. Triantafyllou +10 more
semanticscholar +4 more sources
We report new mapping, tectonic, metamorphic and U–Pb zircon dating data on the polyphased Tachakoucht–Iriri and Tourtit arc-related units within the Moroccan Pan-African belt (Sirwa window, Anti-Atlas). The studied area contains four different sub-units, from south to north: (1) the Tachakoucht gneisses intruded to its northern part by (2) Iriri ...
A. Triantafyllou +10 more
semanticscholar +4 more sources
Geological Society, London, Special Publications, 2008
Abstract Since the discovery of ophiolite sequences, the Bou-Azzer inlier has been considered a key area for understanding the evolution of the northern margin of the West African craton during the Pan-African orogeny. For about 20 years, it had been commonly accepted that the Bou-Azzer inlier represents an accretionary mélange accreted onto ...
R. Bousquet +5 more
semanticscholar +2 more sources
Abstract Since the discovery of ophiolite sequences, the Bou-Azzer inlier has been considered a key area for understanding the evolution of the northern margin of the West African craton during the Pan-African orogeny. For about 20 years, it had been commonly accepted that the Bou-Azzer inlier represents an accretionary mélange accreted onto ...
R. Bousquet +5 more
semanticscholar +2 more sources
Journal of Mining and Geology, 2005
No Abstract.Journal of Mining and Geology 2005, Vol.
V. Ukaegbu, M. Oti
semanticscholar +3 more sources
No Abstract.Journal of Mining and Geology 2005, Vol.
V. Ukaegbu, M. Oti
semanticscholar +3 more sources
Geologische Rundschau, 1978
The rocks of the Maru and Anka regions of northwestern Nigeria comprise a polycyclic, migmatite-gneiss, basement sequence with an infolded cover of low grade metasediments. Both basement and cover are intruded by a suite of syn-tectonic to latetectonic granites and granodiorites.
R. Holt +3 more
semanticscholar +2 more sources
The rocks of the Maru and Anka regions of northwestern Nigeria comprise a polycyclic, migmatite-gneiss, basement sequence with an infolded cover of low grade metasediments. Both basement and cover are intruded by a suite of syn-tectonic to latetectonic granites and granodiorites.
R. Holt +3 more
semanticscholar +2 more sources
Gondwana Research, 2008
Abstract The Neoproterozoic Earth was shaped largely by the Grenvillian and Pan-African orogenies. Out of these, the Grenvillian orogeny has long been regarded to be of minor nature in terms of global-scale orogenic episodes, whereas the Pan-African orogeny has been widely recognized in many continental fragments, although not in major parts of Asia.
S. Rino +5 more
openaire +3 more sources
Abstract The Neoproterozoic Earth was shaped largely by the Grenvillian and Pan-African orogenies. Out of these, the Grenvillian orogeny has long been regarded to be of minor nature in terms of global-scale orogenic episodes, whereas the Pan-African orogeny has been widely recognized in many continental fragments, although not in major parts of Asia.
S. Rino +5 more
openaire +3 more sources
Chemical Geology, 1985
Abstract The eclogites of the Lato hills outcrop within the Pan-African orogenic belt of south Togoland (Dahomeyides) are located within the western border of the Benin plain structural unit (ex Dahomeyen). They are closely associated with epi- to mesozonal metasediments, which are similar to the Pan-African cover formations of the Atacora unit.
R. Ménot, K. F. Seddoh
semanticscholar +2 more sources
Abstract The eclogites of the Lato hills outcrop within the Pan-African orogenic belt of south Togoland (Dahomeyides) are located within the western border of the Benin plain structural unit (ex Dahomeyen). They are closely associated with epi- to mesozonal metasediments, which are similar to the Pan-African cover formations of the Atacora unit.
R. Ménot, K. F. Seddoh
semanticscholar +2 more sources
Journal of African Earth Sciences (and the Middle East), 1991
Abstract Two syenite bodies from south-western Nigeria considered to be pre to syntectonic (Iwo) and late tectonic (Okeiho) with respect to the dominant N-S trending structures that characterize the Nigerian Percambrian basement were dated by the U-Pb zircon method.
M. A. Rahaman, I. Tubosun, J. Lancelot
semanticscholar +2 more sources
Abstract Two syenite bodies from south-western Nigeria considered to be pre to syntectonic (Iwo) and late tectonic (Okeiho) with respect to the dominant N-S trending structures that characterize the Nigerian Percambrian basement were dated by the U-Pb zircon method.
M. A. Rahaman, I. Tubosun, J. Lancelot
semanticscholar +2 more sources