Mineral Chemistry of Wehrlite Xenoliths Hosted in Basalts from the SW of Hosséré Dammougalré (Adamawa Plateau, Cameroon): Thermobarometric Implications — Oak Academic Publishing
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Mineral Chemistry of Wehrlite Xenoliths Hosted in Basalts from the SW of Hosséré Dammougalré (Adamawa Plateau, Cameroon): Thermobarometric Implications
School of Geology and Mining Engineering, University of Ngaoundere, Ngaoundere, Cameroon
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Department of Life and Earth Sciences, Higher Teachers’ Training College, University of Maroua, Maroua, Cameroun
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Department of Earth Sciences, Faculty of Science, University of Ngaoundere, Ngaoundere, Cameroon
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School of Geology and Mining Engineering, University of Ngaoundere, Ngaoundere, Cameroon
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School of Geology and Mining Engineering, University of Ngaoundere, Ngaoundere, Cameroon
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School of Geology and Mining Engineering, University of Ngaoundere, Ngaoundere, Cameroon
1 School of Geology and Mining Engineering, University of Ngaoundere, Ngaoundere, Cameroon
2 Department of Life and Earth Sciences, Higher Teachers’ Training College, University of Maroua, Maroua, Cameroun
3 Department of Earth Sciences, Faculty of Science, University of Ngaoundere, Ngaoundere, Cameroon
4 School of Geology and Mining Engineering, University of Ngaoundere, Ngaoundere, Cameroon
5 School of Geology and Mining Engineering, University of Ngaoundere, Ngaoundere, Cameroon
6 School of Geology and Mining Engineering, University of Ngaoundere, Ngaoundere, Cameroon
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 (Fo 68 − 74 ), and Ti-magnetite are scattered in host basalt. Wehrlite xenoliths (~4 cm size) contain Cr-rich clinopyroxene (diopise-augite), olivine (Fo 76 − 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 (<90) indicate a re-equilibration of Fe-Mg in the host basalt at low temperatures. All the analyzed wehrlite clinopyroxenes have crystallized at high pressures as evidenced by the Al vi and Al iv 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.
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.
Girod, M., Dautria, J.-M., Ball, E. and Soba, D. (1984) Estimation of the Depth of Moho under the Volcanic Massif of Adamaoua (Cameroon), from the Study of Enclaves of Lherzolite. Comptes Rendus de l’Académie des Sciences Paris, Série II, 298, 699-704.
Dautria, J.-M. and Girod, M. (1986) The Enclaves of the Spinel and Plagioclase Lherzolite of the Dibi Volcano (Adamaoua, Cameroon): Witnesses of an Abnormal upper Mantle. Bulletin de Minéralogie, 109, 275-286.
Temdjim, R. (2005) Contribution to the Knowledge of the upper Mantle of Cameroon through the Study of the Ultrabasic and Basic Enclaves by the Volcanoes of Youkou (Adamaoua) and Nyos (Cameruon Line). Thèse de Doctorat d’Etat, Université de Yaoundé I, Yaounde, 339.
Nkouandou, O.F. and Temdjim, R. (2011) Petrology of Spinel Lherzolite Xenoliths and Host Basaltic Lava from Ngao Voglar Volcano, Adamawa Massif (Cameroon Volcanic Line, West Africa): Equilibrium Conditions and Mantle Characteristics. Journal of Geoscience, 56, 375-387.
Nguihdama, D., Chazot, G., Kamgang, P., Mbowou. G.I.B. and Ngounouno, I. (2014) Spinel-Bearing Lherzolite Xenoliths from Hosséré Garba (Likok, Adamawa-Cameroon): Mineral Compositions and Geothermobarometric Implications. International Journal of Geosciences, 5, 1435-1444. https://doi.org/10.4236/ijg.2014.512117
Moreau, C., Regnoult, J.-M., Déruelle, B. and Robineau, B. (1987) A New Tectonic Model for the Cameroon Line, Central Africa. Tectonophysics, 139, 317-334. https://doi.org/10.1016/0040-1951(87)90206-X
Cornacchia, M. and Dars, R. (1983) Un trait structural majeur du continent africain: les linéaments centrafricains du Cameroun au golfe d’Aden [A Major Structural Feature of the African Continent: The Cameroonian Lineaments to the Gulf of Aden]. Bulletin de la Société Géologique de France, 25, 101-109. https://doi.org/10.2113/gssgfbull.S7-XXV.1.101
Pouchou, J.L. and Pichoir, F. (1991) Quantitative Analysis of Homogeneous or Stratified Microvolumes Applying the Model “PAP”. In: Heinrich, K.F.J. and Newbury, D.E., Eds., Electron Probe Quantification, Plenum Press, New York, 31-75. https://doi.org/10.1007/978-1-4899-2617-3_4
Roeder, P.L. and Emslie, R.F. (1970) Olivine-Liquid Equilibrium. Contributions to Mineralogy and Petrology, 29, 275-289. https://doi.org/10.1007/BF00371276
Ngounouno, I. and Déruelle, B. (2007) Petrology of Wehrlites and Clinopyroxenites Xenoliths from Mount Cameroon: Evidence of Mantle Metasomatism. Journal of Cameroon Academy of Science, 7, 35-46.
Morimoto, N. (1989) Nomenclature of Pyroxenes. Canadian Mineralogist, 27, 143-156. https://doi.org/10.2465/minerj.14.198
Wass, S.Y. (1979) Multiple Origins of Clinopyroxenes in Alkali Basaltic Rocks. Lithos, 12, 115-132.
Jagoutz, E., Palme, H., Baddenhausen, H., Blum, K., Cendales, M., Dreibus, G., Spettel, B., Lorenz, V. and Wanke, H. (1979) The Abundances of Major, Minor, and Trace Elements in the Earth’s Mantle as Derived from Primitive Ultramafic Nodules. Procedures Lunar Science Conference, 10, 2031-2050.
Nono, A., Déruelle, B., Demaiffe, D. and Kambou, R. (1994) Tchabal Nganha Volcano in Adamawa (Cameroon): Petrology of a Continental Alkaline Lava Series. Journal of Volcanology and Geothermal Research, 60, 147-178.
Caldeira, R. and Munhá, J.M. (2002) Petrology of Ultramafic Xenoliths from Sao Tomé Island, Cameroon Volcanic Line (Oceanic Sector). Journal of African Earth Science, 34, 231-246.
Lee, D.-C., Halliday, A.N., Davies, G.R., Essene, E.J., Fitton, J.G. and Temdjim, R. (1996) Melt Enrichment of Shallow Depleted Mantle: A Detailed Petrological, Trace Element and Isotopic Study of Mantle-Derived Xenoliths and Megacrysts from the Cameroon Line. Journal of Petrology, 37, 415-441. https://doi.org/10.1093/petrology/37.2.415
Wandji, P., Tsafack, J.P.F., Bardintzeff, J.M., Nkouathio, D.G., Kagou Dongmo, A., Bellon, H. and Guillou, H. (2009) Xenoliths of Dunites, Wehrlites and Clinopyroxenite in the Basanites from Batoke Volcanic Cone (Mount Cameroon, Central Africa): Petrogenetic Implications. Mineralogy and Petrology, 96, 81-98. https://doi.org/10.1007/s00710-008-0040-3
Ngounouno, I., Dagwai, N., Kamgang, P. and Deruelle, B. (2008) Petrology of Spinel Lherzolite Xenoliths in Alkali Basalts from Liri, South of the Kapsiki Plateau (Northernmost Cameroon Hot Line). Journal of Cameroon Academy of Science, 8, 31-42.
Frey, F.A. and Prinz, M. (1978) Ultramafic Inclusions from San Carlos, Arizona: Petrological and Geochemical Data Bearing on Their Petrogenesis. Earth and Planetary Science Letters, 38, 129-176.
Mysen, B.O. and Kushiro, I. (1977) Compositional Variations of Coexisting Phases with Degrees of Melting of Peridotite in the Upper Mantle. American Mineralogist, 62, 843-865.
Brey, G.P. and Kohler, T. (1990) Geothermobarometry in Four-Phase Lherzolites II, New Thermobarometers, and Practical Assessment of Existing Their Barometers. Journal of Petrology, 31, 1353-1378. https://doi.org/10.1093/petrology/31.6.1353
Roeder, L.P., Campbell, I.H. and Jameson, H.E. (1979) A Re-Evaluation of the Olivine-Spinel Geothermometer. Contributions to Mineralogy and Petrology, 68, 325-334. https://doi.org/10.1007/BF00371554
Thy, P. (1983) Spinel Minerals in Transitional and Alkali Basaltic Glasses from Iceland. Contributions to Mineralogy and Petrology, 83, 141-149. https://doi.org/10.1007/BF00373087