Relevant bibliographies by topics / Roches volcaniques – Cameroun (ouest)

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  1. Journal articles
  2. Dissertations / Theses

Academic literature on the topic 'Roches volcaniques – Cameroun (ouest)'

Author: Grafiati
Published: 4 June 2021
Last updated: 14 February 2022

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Journal articles on the topic "Roches volcaniques – Cameroun (ouest)"

1

Bellon, Hervé, Louis Chauris, Bernard Hallégouët, and Pierre Thonon. "Age et origine de roches volcaniques observées sur les estrans de l'extrême ouest du massif armoricain (France)." Norois 139, no. 1 (1988): 331–35. http://dx.doi.org/10.3406/noroi.1988.7631.

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Caen-Vachette, M., P. Tempier, and P. Kamgang. "Le massif tertiaire du Nkogam (Ouest Cameroun): caractéristiques principales et géochronologie Rb/Sr sur roches totales." Journal of African Earth Sciences (1983) 6, no. 4 (1987): 521–24. http://dx.doi.org/10.1016/0899-5362(87)90092-3.

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Schoonmaker, Adam, William S. F. Kidd, Stephen E. DeLong, and John F. Bender. "Lawrence Head Volcanics and Dunnage Mélange, Newfoundland Appalachians: Origin by Ordovician Ridge Subduction or in Back-Arc Rift?" Geoscience Canada 41, no. 4 (2014): 523. http://dx.doi.org/10.12789/geocanj.2014.41.053.

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This paper reviews the geological setting and reports new geochemical trace element data from the Ordovician Lawrence Head Volcanics (LHV) and the underlying gabbro sills in the Exploits Group. In combination with existing published analyses and ages of these rocks, the volcanic rocks and sills are indistinguishable in composition and age, and the data are consistent with the hypothesis that they represent the same (mostly E-MORB composition) magmatic event in the early–mid Darriwilian (~465 ± 2 Ma). The LHV and their enclosing strata show regional evidence for: 1) upward decline of volume and
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Hildebrand, Robert S., and Joseph B. Whalen. "Arc and Slab-Failure Magmatism in Cordilleran Batholiths II – The Cretaceous Peninsular Ranges Batholith of Southern and Baja California." Geoscience Canada 41, no. 4 (2014): 399. http://dx.doi.org/10.12789/geocanj.2014.41.059.

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Ever since the late 1960s when Warren Hamilton proposed that the great Cordilleran batholiths of the western Americas are the roots of volcanic arcs like the Andes and were generated by longstanding eastward subduction, most geologists have followed suit, despite the evergrowing recognition that many Cordilleran batholiths are complex, composite bodies that developed with intervals of intense shortening and exhumation between and during periods of magmatism. The Peninsular Ranges batholith of Southern and Baja California provides a superb place to unravel the complexities because there is a lo
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Hughes, K. Stephen, James P. Hibbard, Jeffrey C. Pollock, David J. Lewis, and Brent V. Miller. "Detrital Zircon Geochronology Across the Chopawamsic Fault, Western Piedmont of North-Central Virginia: Implications for the Main Iapetan Suture in the Southern Appalachian Orogen." Geoscience Canada 41, no. 4 (2014): 503. http://dx.doi.org/10.12789/geocanj.2014.41.052.

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The Chopawamsic fault potentially represents the main Iapetan suture, previously unidentified in the southern extent of the Appalachian orogen. The fault trends through the north-central portion of the western Piedmont of Virginia and separates the composite metaclastic Potomac terrane, commonly interpreted to be of Laurentian affinity, from the Chopawamsic terrane, the remains of a Middle Ordovician volcanic arc of uncertain crustal affinity. To gain insight on the first-order orogenic significance of the Chopawamsic fault, we report the results of LA–ICP–MS U–Pb analyses of 1,289 detrital zi
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Hildebrand, Robert S., and Joseph B. Whalen. "Arc and Slab-Failure Magmatism in Cordilleran Batholiths I – The Cretaceous Coastal Batholith of Peru and its Role in South American Orogenesis and Hemispheric Subduction Flip." Geoscience Canada 41, no. 3 (2014): 255. http://dx.doi.org/10.12789/geocanj.2014.41.047.

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We examined the temporal and spatial relations of rock units within the Western Cordillera of Peru where two Cretaceous basins, the Huarmey-Cañete and the West Peruvian Trough, were considered by previous workers to represent western and eastern parts respectively of the same marginal basin. The Huarmey-Cañete Trough, which sits on Mesoproterozoic basement of the Arequipa block, was filled with up to 9 km of Tithonian to Albian tholeiitic–calc-alkaline volcanic and volcaniclastic rocks. It shoaled to subaerial eastward. At 105–101 Ma the rocks were tightly folded and intruded during and just a
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Oliveros, Veronica, Pablo Moreno-Yaeger, and Laura Flores. "Igneous Rock Associations 25. Pre-Pliocene Andean Magmatism in Chile." Geoscience Canada, July 10, 2020, 65–82. http://dx.doi.org/10.12789/geocanj.2020.47.158.

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Andean-type magmatism and the term ‘andesite’ are often used as the norm for the results of subduction of oceanic lithosphere under a continent, and the typical rock formed. Although the Andes chain occupies the whole western margin of South America, the most comprehensively studied rocks occur in the present-day Chilean territory and are the focus of this paper. Andean magmatism in this region developed from the Rhaetian-Hettangian boundary (ca. 200 Ma) to the present and represents the activity of a long-lived continental magmatic arc. This paper discusses Pre-Pleistocene volcanic, plutonic,
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Dissertations / Theses on the topic "Roches volcaniques – Cameroun (ouest)"

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Nana, Jean-Merbel. "Le complexe volcano-plutonique de Bana (Ouest Cameroun) : géologie et pétrologie." Paris 11, 1988. http://www.theses.fr/1988PA112063.

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Le massif volcano-plutonique du mont Bana appartient à la ligne magmatique du Cameroun. Constitué d'un complexe anorogénique saturé en silice de forme ovoïde (9 x 5 km), il est intrusif dans les basaltes d'âge éocène-oligocène. L'ensemble volcanique, précoce, comprend des termes intermédiaires et acides (mugéarites, benmoréites, rhyolites) associés à des tufs soudés. La suite magmatique évolue par la cristallisation fractionnée des clinopyroxènes et des plagioclases. L'ensemble plutonique associé monzodiorites, de monzonites, et est constitué de leucogabbros, de de granites. L'évolution de la
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2

Nono. "Pétrologie d'un volcan alcalin intraplaque : Le massif de Nganha dans l'Adamaoua (Cameroun)." Nancy 1, 1987. http://www.theses.fr/1987NAN10014.

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Le massif volcanique de Nganha est constitué de grandes coulées basaltiques et phonolitiques qui alternent avec les brèches volcaniques, traversées par des pitons et des necks basaltiques et trachytiques, l'ensemble reposant sur un substratum granito-syénitique. Ce massif serait d'âge mio-pliocène
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3

Ildefonse, Philippe. "Analyse petrologique des alterations premeteoriques et meteoriques de deux roches basaltiques (basalte alcalin de belbex, cantal, et hawaiite de m'bouda, cameroun)." Paris 7, 1987. http://www.theses.fr/1987PA077118.

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Cette analyse permet de definir les parageneses minerales successives de l'alteration. Il est alors possible d'apprehender les mecanismes geochimiques ayant preside a ces alterations, et d'en analyser certaines relations, chronologiques ou causales, qu'ils peuvent presenter entre eux
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4

Lo, Papa Goumbo. "Le volcanisme quaternaire de Dakar (Sénégal occidental) : Particularités pétrographiques, caractères géochimiques, implications pétrogénétiques." Nancy 1, 1988. http://www.theses.fr/1988NAN10173.

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Étude des manifestations volcaniques successives entre 1,5 et 0,6 MA des zones de fractures de Dakar, de la pétrographie et géochimie des laves émises et de leurs enclaves. La série peu différenciée et alcaline a tendance sodique appartient au groupe des basaltes continentaux des zones en distension. Ces manifestations sont liées à l'activité d'un point chaud
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Bassahak, Jean. "Le complexe plutonique du Massif de Kogue (Poli-nord Cameroun) : Pétrologie, géochimie, pétrologie structurale, sa place dans le plutonisme de la chaîne panafricaine au Nord Cameroun." Nancy 1, 1988. http://www.theses.fr/1988NAN10017.

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L'architecture, la mise en place et la pétrogénèse du Massif du Kogue (Poli, Nord Cameroun) s'intègrent dans l'évolution tectonique et plutonique de la zone mobile panafricaine du Nord Cameroun. Intrusion dans les formations métamorphiques de Poli, le complexe plutonique de Kogue est formé de deux unités constituées par deux lignées de différenciation magmatique, d'affinité calco-alcaline. L'agencement et l'analyse des trajectoires des fluidalités planaires soulignent une mise en place syntectonique sous forme de dome diapir dans un couloir de cisaillement. L'état rhéologique des magmas granit
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