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Menzies, M., Rodgers, N., Tindle, A. and Hawkesworth, C. (1987) Metasomatic and Enrichment Processes in Lithospheric Peridotites, an Effect of the Asthenosphere-Lithosphere Interaction. In: Menzies, M. and Hawkesworth, C.J., Eds., Mantle Metasomatism Academic Press, London, 313-361.

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• TITLE: Mineral Chemistry of Wehrlite Xenoliths Hosted in Basalts from the SW of Hosséré Dammougalré (Adamawa Plateau, Cameroon): Thermobarometric Implications

  AUTHORS: Isaac Bertrand Gbambié Mbowou, Dagwaï Nguihdama, Fadimatou Ngounouno Yamgouot, Mama Ntoumbe, Abdel Aziz Youpoungam, Ismaïla Ngounouno

  KEYWORDS: Wehrlite, Adamawa Plateau, Hosséré Dammougalré, Mineral Chemistry, Geothermometry

  JOURNAL NAME: Open Journal of Geology, Vol.7 No.10, October 16, 2017

  ABSTRACT: Wehrlite samples (size: ~4 cm) hosted in basaltic lavas from the SW of Hosséré Dammougalré are located in the western Adamawa Plateau. Porphyritic and allotriomorphic texture characterize respectively host Basalt and wehrlite xenoliths. The phenocrysts of olivine (Fo68−74), and Ti-magnetite are scattered in host basalt. Wehrlite xenoliths (~4 cm size) contain Cr-rich clinopyroxene (diopise-augite), olivine (Fo76−88) and chromiferous spinel. Equilibrium temperatures calculated from Fe/Mg exchange reaction for olivine/spinel vary between 944°C and 1102°C. The wehrlite olivine crystals with low Fo (vi and Aliv contents. The studied spinel-bearing wehrlite xenoliths represent probably the residual portions of the upper mantle, which are an important source of information about lithospheric composition and thermal evolution beneath the Adamawa Plateau.