Existence de dykes doléritiques anciens à composition de tholéiites continentales au sein de la province alcaline de la ligne du Cameroun. Implication sur le contexte géodynamique
type: Distribution
access URL: https://insu.hal.science/hal-00089827
format: HTML
issued: 2026-05-08T11:17:59.330598
modified: 2026-05-08T11:17:59.308308

test_moissonnage_selune
type: Agent

Existence de dykes doléritiques anciens à composition de tholéiites continentales au sein de la province alcaline de la ligne du Cameroun. Implication sur le contexte géodynamique
type: Dataset
contact point: Organization
  fn: CCSD
keyword: continental-extension
keyword: sdemcgenvironmental-sciencesglobal-changes
keyword: journal-articles
keyword: infoeu-reposemanticsarticle
keyword: low-ti-continental-tholeiites
keyword: sdustutesciences-of-the-universe-physicsearth-sciencestectonics
keyword: lithospheric-magma
keyword: dolerites
keyword: cameroon-line
landing page: 0764-4469
description: n the Adamawa Plateau (Northern Cameroon), doleritic dykes belong to a magmatic activity which predated the Cenozoic alkaline volcanism of the Cameroon Line. They have the chemical composition of continental tholeiites with Nb-Ta- and Ti-negative anomalies. This magmatism is interpreted as being derived from a sub-continental lithospheric source, which may have been contaminated during a former subduction event, linked to the Pan-African convergence. It is related to an early stage of continental break-up, which was contemporaneous or predated the Cretaceous tholeiitic magmatism of predominantly asthenospheric origin, which indicates a lithospheric thinning.
issued: 2026-05-08T11:17:59.328557
language: fr
modified: 2026-05-08T11:17:59.328561