Transitional tholeiitic basalts in the Tertiary Bana volcano–plutonic complex, Cameroon Line

Kuepouo, Gilbert; Tchouankoue, Jean Pierre; Nagao, Takashi; Sato, H.

doi:10.1016/j.jafrearsci.2006.03.005

Cited by 48 publications

(55 citation statements)

References 47 publications

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“…Les roches volcaniques de couverture qui affleurent largement sur les hauts plateaux de l'Ouest-Cameroun (surtout dans les Monts Bambouto, Bana et Bangou), sont comme les roches plutoniques, alcalines à hyperalcalines, mais avec une affinité transitionnelle aux Monts Bangou et Bana (Fosso et al, 2005;Kuepouo et al, 2006). Elles présentent une large variation de composition minéralogique des roches mafiques aux roches felsiques : olivine + augites + plagioclase (bytownite) dans les basaltes alcalins, puis plagioclase (bytownite, labrador, andésine) + pyroxène (salite, augite) + rares cristaux d'olivine dans les hawaïtes et enfin plagioclase (labrador, andésine, oligoclase, albite) + pyroxène (augite, aegyrine) + k-feldspath (sanidine, anorthose) + rares cristaux d'amphibole et biotite dans les laves felsiques.…”

Section: Aperçu Minéralogique Et Géochimiqueunclassified

Influence de la nature lithologique et des structures géologiques sur la qualité et la dynamique des eaux souterraines dans les hauts plateaux de l’Ouest-Cameroun

Nono¹,

Likeng²,

Wabo³

et al. 2009

International Journal of Biological and Chemical Sciences

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RESUMELes Hauts plateaux de l'Ouest-Cameroun constituent une vaste zone de hautes terres où de nombreuses populations consomment de l'eau à l'état naturel. Le but de cette étude est d'établir si possible un lien entre les faciès, les structures géologiques, la productivité et la qualité chimique des eaux de consommation. Les méthodes géologiques (cartographie de terrain), la photo-interprétation, les sondages géoélectriques

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Section: Aperçu Minéralogique Et Géochimiqueunclassified

Influence de la nature lithologique et des structures géologiques sur la qualité et la dynamique des eaux souterraines dans les hauts plateaux de l’Ouest-Cameroun

Nono¹,

Likeng²,

Wabo³

et al. 2009

International Journal of Biological and Chemical Sciences

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“…: Nda Ali massif; Nkogam massif ) and centers such as Mt Bambouto, Mt Mbapit [29], Mt Bana [30], Mt Bangou [31] and flood basalts. This displays a various chemical affinities which include alkaline [32]; transitional [31] and tholeiitic [30].…”

Section: Geological Settingmentioning

confidence: 99%

Evidence for the Upwelling of Mafic Bodies into the Upper Crust beneath the N40-50&#176;E Branch of the Pan-African Central Cameroon Shear Zone from Gravity Studies

Yap¹,

Nouayou²,

Tchato³

et al. 2018

OJG

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The existence of mafic bodies at mid crustal level beneath the Pan-African Central Cameroon Shear Zone is still a matter of debate. To provide additional constrains on this issue, the crust of the west region of Cameroon has been investigated using gravity data. Analyses of these data show N40-50˚E oriented iso-anomal contours in the Bafoussam area, interpreted as the N40-50˚E branch of the Central Cameroon Shear Zone. In addition, spectral analysis and 2.5D gravity modeling reveal intrusions of mafic bodies at depth between 3.2 and 14.2 km under N40-50˚E aligned volcanic centers, namely Mt Bambouto and Mt Mbapit. The above observations suggest a structurally controlled emplacement of the mafic bodies. In the light of the recent geophysical data, the interaction between the NE-ward channel flow operating at the bottom of the lithosphere or the asthenosphere upwelling and the Cameroon Shear Zone could better explain the magma upwelling in the upper crust. This result is the novelty of the present work.

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“…Dashed line delineates the boundary between alkaline and subalkaline basaltic series after [25]. Data source: Bana anorogenic complex [1]; Bambouto and Adamawa basalts [2]; Benue Through basalts [3].…”

Section: Whole Rock Geochemistrymentioning

confidence: 99%

“…1). We compare the trace element patterns of these basalt dykes with the CVL plateau basalts from the Bangangte area (this work), basalts from the Cenozoic Bana anorogenic complex [1], Mt. Bambouto and Ngaounderé plateau basalts [2], as well as basalts from the Benue Through in Nigeria [3].…”

Section: Introductionmentioning

confidence: 99%

“…We will use our new geochemical and isotopic data on mafic basement-cutting dikes in south-central Cameroon to (1) better differentiate between products Lower Tertiary CVL magmatism and older dykes that formed within the context of Phanerozoic magmatism linked to the opening of the South Atlantic Ocean, and (2) characterise the magmatism during the opening of the Central Atlantic.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Petrology, Geochemistry, and Geodynamic Implications of Basaltic Dyke Swarms from the Southern Continental Part of the Cameroon Volcanic Line, Central Africa

Tchouankoue¹

2012

TOGEOJ

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Basaltic dyke swarms in the southern continental part of the Cameroon Volcanic Line (Bangangte, Dschang, Manjo areas) are tholeiitic in composition with 46 to 50 wt.% SiO 2 and have moderate Mg-numbers (53-59), medium TiO 2 contents (1.48-2,05 wt.%), and flat to mildly enriched incompatible trace element patterns. Comparison with trace element patterns of representative Cenozoic basaltic rocks of the Cameroon Volcanic Line (Bana anorogenic complex, Mt. Bambouto, Adamawa Plateau basalts) indicates that these dykes are less enriched in light REE and show different incompatible trace element ratios (La/Yb: 5.7 to 8.6; Zr/Nb: 7.6 to 12.0; Ba/Th: 87.7 to 93.3). The trace element patterns of the dykes and their Sr-and Nd-isotope compositions, however, are similar to those of the pre-Cenozoic volcanic rocks of the Benue Trough in Nigeria. Our data therefore suggest that these dykes represent the magmatic history related to the break-up of Africa and South America and are unrelated to the Tertiary volcanism of the Cameroon Line.

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Transitional tholeiitic basalts in the Tertiary Bana volcano–plutonic complex, Cameroon Line

Cited by 48 publications

References 47 publications

Influence de la nature lithologique et des structures géologiques sur la qualité et la dynamique des eaux souterraines dans les hauts plateaux de l’Ouest-Cameroun

Influence de la nature lithologique et des structures géologiques sur la qualité et la dynamique des eaux souterraines dans les hauts plateaux de l’Ouest-Cameroun

Evidence for the Upwelling of Mafic Bodies into the Upper Crust beneath the N40-50&#176;E Branch of the Pan-African Central Cameroon Shear Zone from Gravity Studies

Petrology, Geochemistry, and Geodynamic Implications of Basaltic Dyke Swarms from the Southern Continental Part of the Cameroon Volcanic Line, Central Africa

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Transitional tholeiitic basalts in the Tertiary Bana volcano–plutonic complex, Cameroon Line

Cited by 48 publications

References 47 publications

Influence de la nature lithologique et des structures géologiques sur la qualité et la dynamique des eaux souterraines dans les hauts plateaux de l’Ouest-Cameroun

Influence de la nature lithologique et des structures géologiques sur la qualité et la dynamique des eaux souterraines dans les hauts plateaux de l’Ouest-Cameroun

Evidence for the Upwelling of Mafic Bodies into the Upper Crust beneath the N40-50&amp;#176;E Branch of the Pan-African Central Cameroon Shear Zone from Gravity Studies

Petrology, Geochemistry, and Geodynamic Implications of Basaltic Dyke Swarms from the Southern Continental Part of the Cameroon Volcanic Line, Central Africa

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Evidence for the Upwelling of Mafic Bodies into the Upper Crust beneath the N40-50°E Branch of the Pan-African Central Cameroon Shear Zone from Gravity Studies