 | | Journal (article/letter/editorial) | | response to hydrothermal alteration at Mount Etinde, Cameroon Jacques Etame a,∗ , Che Emmanuel Suh b...Douala, Faculty of Sciences, BP 24157, Douala, Cameroon Economic Geology Unit, Department of Geology and...Environmental Science, University of Buea, P.O. Box 63, Buea, Cameroon c IRD, UMR 161 CEREGE, Institut de...rocks and hydrothermally altered rocks at Mount Etinde (Cameroon Volcanic Line, West Africa) have been studied...(1995) described the nephelinitic rocks at Mount Etinde Cameroon as Quaternary rocks which have been subjected |  | Bate Tibang, E. E., Suh, C. E., Cottle, J., Ateh, K. I., Tiabou, A. F., Nche, L. A., Che, V. B., Vishiti, A. (2017) Petrology and geochronology of felsic volcanics in the Sabga area (Bamenda Highlands): implications for age variation along the Cameroon Volcanic Line. Journal of GEOsciences, 62 (4) 231-246 | Journal (article/letter/editorial) | | Highlands): implications for age variation along the Cameroon Volcanic Line Edith Etakah BATE TIBANG1,2*, Cheo...of Geology, University of Buea, P.O. Box 63, Buea, South West Region, Cameroon Institute for Geological...Mining Research (IRGM), P.O. Box 333, Garoua, Cameroon; edithbate@yahoo.com Department of Geology, Environmental...of Bamenda, P.O. Box 39 Bambili, North West Region, Cameroon Department of Earth Sciences and Earth Research...of Geology, University of Buea, P.O. Box 63, Buea, South West Region, Cameroon Department of Civil Engineering |  | Yamgouot, Fadimatou Ngounouno, Déruelle, Bernard, Gbambié Mbowou, Isaac Bertrand, Ngounouno, Ismaïla, Demaiffe, Daniel (2016) Geochemistry of the volcanic rocks from Bioko Island (“Cameroon Hot Line”): Evidence for plume-lithosphere interaction. Geoscience Frontiers, 7 (5) 743-757 doi:10.1016/j.gsf.2015.06.003 | Journal (article/letter/editorial) | | Geochemistry of the volcanic rocks from Bioko Island (“Cameroon Hot Line”): Evidence for plume-lithosphere interaction...Université de Ngaoundéré, B.P. 454, Ngaoundéré, Cameroon Laboratoire de Magmatologie et Géochimie Inorganique...Université de Ngaoundéré, B.P. 115, Meiganga, Cameroon d Laboratoire de Géochimie Isotopique et Géodynamique...the presently more active volcanic zone of the Cameroon Line and composed essentially of alkaline basalts...geochemical signatures are similar to those of the Mount Cameroon rocks, and might be attributed to low degrees |  | | Journal (article/letter/editorial) | | lava from Ngao Voglar volcano, Adamawa Massif (Cameroon Volcanic Line, West Africa): equilibrium conditions...University of Ngaoundere, P.O. Box 454 Ngaoundere, Cameroon Department of Earth Sciences, Faculty of Sciences...University of Yaounde I, P.O. Box 812 Yaoundé, Cameroon; rtemdjim@yahoo.fr Corresponding author Spinel-bearing...of Ngaoundere in the Adamawa volcanic Massif (Cameroon). They have been examined to characterize the...conditions of the upper mantle beneath the Ngaoundere region. The xenoliths exhibit protogranular textures and |  | Mbassa, Benoît Joseph, Njonfang, Emmanuel, Benoit, Mathieu, Kamgang, Pierre, Grégoire, Michel, Duchene, Stephanie, Brunet, Pierre, Ateba, Bekoa, Tchoua, Félix M. (2012) Mineralogy, geochemistry and petrogenesis of the recent magmatic formations from Mbengwi, a continental sector of the Cameroon Volcanic Line (CVL), Central Africa. Mineralogy and Petrology, 106 (3) 217-242 doi:10.1007/s00710-012-0227-5 | Journal (article/letter/editorial) | | formations from Mbengwi, a continental sector of the Cameroon Volcanic Line (CVL), Central Africa Benoît Joseph...et Minières, IRGM/ARGV Ekona, B.P. 370, Buéa, Cameroon E. Njonfang Laboratoire de Géologie, Ecole Normale...Supérieure, Université de Yaoundé I, B.P. 47 Yaoundé, Cameroon M. Benoit : M. Grégoire (*) : S. Duchene : P....Sciences, Université de Yaoundé I, B.P. 812, Yaoundé, Cameroon in a trachyte from neighboring Bamenda Mountains...parental magmas along the CVL. Introduction The Cameroon volcanic line (CVL) is a tectono-magmatic structure |  | Wandji, P., Tsafack, J. P. F., Bardintzeff, J. M., Nkouathio, D. G., Kagou Dongmo, A., Bellon, H., Guillou, H. (2009) Xenoliths of dunites, wehrlites and clinopyroxenites in the basanites from Batoke volcanic cone (Mount Cameroon, Central Africa): petrogenetic implications. Mineralogy and Petrology, 96 (1) 81-98 doi:10.1007/s00710-008-0040-3 | Journal (article/letter/editorial) | | in the basanites from Batoke volcanic cone (Mount Cameroon, Central Africa): petrogenetic implications...Springer-Verlag 2009 Abstract The lavas of the Mount Cameroon, a PlioQuaternary stratovolcano and the most...most important volcano along the Cameroon Volcanic Line (CVL), constitute a weakly differentiated alkaline...rich lherzolite in the upper mantle beneath the Cameroon Volcanic Line. The AlIV/AlVI ratios remain high...xenoliths from the CVL. Fig. 1 a Location map of the Cameroon Volcanic Line (CVL). The main geologic features |  | | Journal (article/letter/editorial) | | forces, including fluid buoyancy. Furthermore, the region near the crack tip that is damaged as a part of...of plagioclase, sizes of both are 2 mm. Titan–magnetite (0.2 mm) develops around pyroxene grains. The... 0.3–3 mm. The rock contains a lot of titano–magnetite that concentrates with crystals of pyroxene. Comparative...ophite one. Rocks of all extrusions contain titano-magnetite, as a result they have high values of magnetic...conclusion that from contemporary magma titano–magnetite is crystallized more ferruginous than from more |  | | Report (chapter) | | org/ at Yale University on December 26, 2014 The Cameroon line, West Africa: a comparison between oceanic...alkaline volcanism J. G. Fitton S U M M A RY: The Cameroon line is the only known intra-plate alkaline volcanic...mantle sources for alkali basalt. Although the Cameroon line does not have a graben structure, its origin...preserved for long periods, it follows that the Cameroon line magmas could not have had a metasomatically...metasomatically enriched lithosphere source. The Cameroon line alkali basalts are chemically and isotopically similar |  | Kanouo, Nguo Sylvestre, Yongue, Rose Fouateu, Ekomane, Emile, Njonfang, Emmanuel, Ma, Changqian, Lentz, David R., She, Zhenbing, Zaw, Khin, Venkatesh, Akella Satya (2015) U-Pb Ages for Zircon Grains from Nsanaragati Alluvial Gem Placers: Its Correlation to the Source Rocks. Resource Geology, 65 (2) 103-121 doi:10.1111/rge.12063 | Journal (article/letter/editorial) | | Yaoundé I, Yaoundé, Cameroon, 3Higher Institute of Chemistry and Management, Yaoundé, Cameroon, 4Higher Teachers...Training School, University of Yaoundé I, Yaoundé, Cameroon, 5Department of Earth Sciences, University of...Abstract The Mamfe Basin is located in the SW of Cameroon and is an extension of the much bigger Benue Trough...from the Benue Trough in the West and from the Cameroon Volcanic Line (CVL) in the SE of the study area...methods. The most probable sources were Mount Bamenda and Mount Bambouto in the east of the Mamfe Basin |  | Marzoli, Andrea, Aka, Festus T., Merle, Renaud, Callegaro, Sara, N’ni, Jean (2015) Deep to shallow crustal differentiation of within-plate alkaline magmatism at Mt. Bambouto volcano, Cameroon Line. Lithos, 220. 272-288 doi:10.1016/j.lithos.2015.02.005 | Journal (article/letter/editorial) | | within-plate alkaline magmatism at Mt. Bambouto volcano, Cameroon Line Andrea Marzoli, Festus T. Aka, Renaud Merle...within-plate alkaline magmatism at Mt. Bambouto volcano, Cameroon Line, LITHOS (2015), doi: 10.1016/j.lithos.2015...within-plate alkaline magmatism at Mt. Bambouto volcano, Cameroon Line T Andrea Marzoli* SC R Padova, Italy...Mining Research (IRGM), P.O Box 4110 Yaoundé, Cameroon Renaud Merle MA Department of Applied Geology...Mining Research (IRGM), P.O Box 4110 Yaounde, Cameroon AC Corresponding author: andrea.marzoli@unipd |  | | Book | | ring complexes and the chapter devoted to the Cameroon line. A detailed review of African ring complexes... XIV 2 Contents Phanerozoic Volcanism of Southwest Uganda: A Case for Regional K and lile Enrichment...Ultrapotassic Mafic-Ultramafic Magmatism in the Southwest Uganda Region of the African Rift: Implications from...Mafic-Ultramafic Ultra potassic Rocks of the Southwest Ugandan Area ........................... 3 Inferences.... . . ... 3 The Crust Under the Canary Islands Region ............. 4 Network of Fractures and Identity |  | | Journal (article/letter/editorial) | | Faculty of Science, The University of Yaounde, Cameroon, 3 Institute for Study of the Earth's Interior...basaltic samples taken from the central part of the Cameroon Volcanic line to estimate the compositions of...highest M g O contents reported so far from the Cameroon volcanic line. Zusammenfassung Olivin Kristalle...states of iron buffered by the quartz-fayalite-magnetite (QFM) assemblage. Slight differences in olivine...basaltic samples from the central part of the Cameroon volcanic line (Figure 1). The bulk rock data of |  | | Journal (article/letter/editorial) | | geological map. KEY WORDS; nephelinites; Mt Etinde; Cameroon; petmgenesis; The petrogenesis and source characteristics...Sciences, Universite de Yaounde, BP 812, Yaounde, Cameroon, f Corresponding author. 1 Oxford University...leucite nephelinites, haiiynophyres and the large Mt Cameroon. Its eruptions are dated at 0-65 Ma euhedral to...nepheline-bearing nephelinites. and took place during the Mt Cameroon eruptive cycle (6 Ma The lava-type 'etindite'...(1923) for a lava composed of titanaugite and Mt Cameroon alkali basalts, are melanephelinites, nephelinites |  | | Journal (article/letter/editorial) | | Clinopyroxene from some felsic alkaline rocks of the Cameroon Line, central Africa: petrological implications...rocks belonging to the continental part of the Cameroon Line (CL). The investigated samples include both...contamination on the observed trends. Key-words: Cameroon Line, alkaline complexes, felsic rocks, Zr- and...aegirines, clinopyroxene trends. 1. Introduction The Cameroon Line (CL) is a prominent geological feature in...part is represented by the volcanic massifs of Mount Cameroon, Rumpi, Manengouba, Bambouto, Oku and the volcanic |  | | Journal (article/letter/editorial) | | rocks from Little Mount Cameroon (Etinde), a subsidiary volcanic centre of the Mt. Cameroon volcanic pile...basalts which are reported to prevail in the Mt. Cameroon region. Among these alkali rocks the nephelinites...nepheline and titanaugite with leucite, and accessory magnetite, apatite, perovskite, and titanite.J The striking...Nephelinite with leucite (Etindite). Etinde Volcano, Mt. Cameroon, Cameroons. Anal. : J. H. Scoon. 2. Nephelinite...Nephelinite with leucite (Etindite). Etinde Volcano, Mt. Cameroon, Cameroons. Esch (1901), p. 39. 3. Nepheline syenite |  | Wandji, Pierre, Tchokona Seuwui, Dieudonné, Bardintzeff, Jacques-Marie, Bellon, Hervé, Platevoet, Bernard (2008) Rhyolites of the Mbépit Massif in the Cameroon Volcanic Line: an early extrusive volcanic episode of Eocene age. Mineralogy and Petrology, 94 (3) 271-286 doi:10.1007/s00710-008-0013-6 | Journal (article/letter/editorial) | | ORIGINAL PAPER Rhyolites of the Mbépit Massif in the Cameroon Volcanic Line: an early extrusive volcanic episode...Mbépit Massif, one of the oldest volcanoes of the Cameroon Volcanic Line, was built up during the Eocene...flows. Such felsic lavas are rather rare in the Cameroon Volcanic Line. Most rhyolites are porphyritic...Supérieure, Université de Yaoundé I, BP 47, Yaoundé, Cameroon e-mail: pierrewandji@yahoo.fr D. Tchokona Seuwui...Terre, Université de Yaoundé I, BP 812, Yaoundé, Cameroon e-mail: seuwui@yahoo.fr J.-M. Bardintzeff (*) |  | | Report (chapter) | | the ferromagnetic (sensu lato) minerals such as magnetite. Oxide phases are relatively abundant (up to 40%...which is consistent with the volumetrically high magnetite content observed in the thin-sections of the dykes...During the 1958, 1999 and 2000 eruptions at Mount Cameroon basaltic shield volcano, the first stages were...have experienced the same process as that at Mount Cameroon, explaining the occurrence of both upwards...M. & Funiciello, R. 2006b. Fissure eruptions at Mount Downloaded from http://sp.lyellcollection.org/ |  | Opfergelt, S., Cardinal, D., André, L., Delvigne, C., Bremond, L., Delvaux, B. (2010) Variations of δ30Si and Ge/Si with weathering and biogenic input in tropical basaltic ash soils under monoculture. Geochimica et Cosmochimica Acta, 74 (1) 225-240 doi:10.1016/j.gca.2009.09.025 | Journal (article/letter/editorial) | | sequences of soils derived from basaltic ash in Cameroon. Si-isotopic and Ge/Si signatures of the soil...Soil materials The study areas are located in Cameroon, West Africa, in the Mungo plain (4°300 –4°530...of Mount Cameroon volcano (4°090 –4°130 N 9°160 –9°210 E; 400–900 m above sea level). This region is...year1 in Mungo, and 2250–2800 mm year1 in Mt. Cameroon (Martin and Sieffermann, 1966). Soils derive from...basaltic pyroclasts transported by mudflow in the Mt. Cameroon. These basalts belong to the same Quaternary “Série |  | Asaah, Asobo N.E., Yokoyama, Tetsuya, Aka, Festus T., Usui, Tomohiro, Kuritani, Takeshi, Wirmvem, Mengnjo J., Iwamori, Hikaru, Fozing, Eric M., Tamen, Jules, Mofor, Gilbert Z., Ohba, Takeshi, Tanyileke, Gregory, Hell, J.V. (2015) Geochemistry of lavas from maar-bearing volcanoes in the Oku Volcanic Group of the Cameroon Volcanic Line. Chemical Geology, 406. 55-69 doi:10.1016/j.chemgeo.2015.03.030 | Journal (article/letter/editorial) | | Maar–bearing Volcanoes in the Oku Volcanic Group of the Cameroon Volcanic Line Asobo N.E. Asaah, Tetsuya Yokoyama...Maar–bearing Volcanoes in the Oku Volcanic Group of the Cameroon Volcanic Line, Chemical Geology (2015), doi: 10...Maar–bearing Volcanoes in the Oku Volcanic Group of the Cameroon Volcanic Line SC R IP Asobo N.E. Asaah1, 2*...Yaoundé, Cameroon Institute of Mining and Geological Research, P.O. Box 4110, Yaoundé, Cameroon 4 D ...Department of Earth Sciences, University of Dschang, Cameroon Higher Teachers’ Training College, Bambili, University |  | | Book | | basic understanding of the geology of an area or region will never happen without initial observation of...Algeria Angola Benin Botswana Burkina Faso Burundi Cameroon Canary Islands (Spain) Cape Verde Central African...(1872) on East Africa, in which the Great Lakes region of central eastern Africa is very poorly figured...Rift Valley. Being the Narrative of a Journey to Mount Kenya and Lake Baringo.- I-XX, 1-405; John Murray...alongstrike facies variations from chert-hematite/magnetite associations into carbonates and sulphides. Typical |  | | Report (issue) | | A354V65 2011 551.21096—dc22 2011006982 Cover: (Top) Mount Meru (4566 m high), Tanzania, from the western side...Hanley, Terry M. Seward, and Frederik Reutten 9. Cameroon Line alkaline magmatism (central Africa): A reappraisal...fingerprints of mantle metasomatism beneath Nyos volcano (Cameroon volcanic line) . . . . . . . . . . . . . . . ...propagation into the southern Tyrrhenian backarc region. . . . . . . . . . . . . . . . . . . . . . . ....among the volcanic provinces of the Saharan zone, Cameroon volcanic line, Angola and Namibia, and the East |  | | Report (volume) | | xenoliths of Ascension Island 269 FITTON, J. G. The Cameroon line, West Africa: a comparison between oceanic...examples. The Proterozoic Gardar province in SouthWest Greenland is probably the best studied of these...province, Bolivia) and Kogarko (Kola Peninsula). The Cameroon line in West Africa (Fitton) includes both continental...Mountain provinces, N o r t h America), Fitton (Cameroon line, West Africa) and Fletcher & BeddoeStevens...examples. The Proterozoic Gardar province in SouthWest Greenland is probably the best studied of these |  | | Journal (article/letter/editorial) | | hornblende, <1% K-feldspar and chlorite, and accessory magnetite, sphene, apatite, and zircon. The watershed, covered...transported from North Africa to the Caribbean region between latitude 10° N and 25° N is in excess of...be a significant source of soil in the Caribbean region, as evidenced by soil mineralogy, isotopic tracers...ocean dust deposition in the eastern Caribbean region is roughly 500 mg cm2 ka1 (Mahowald et al., 2006)...the model is somewhat under-constrained in this region (Kohfeld and Harrison, 2001). While dust loads |  | Ganino, Clément, Arndt, Nicholas T., Zhou, Mei-Fu, Gaillard, Fabrice, Chauvel, Catherine (2008) Interaction of magma with sedimentary wall rock and magnetite ore genesis in the Panzhihua mafic intrusion, SW China. Mineralium Deposita, 43 (6) 677-694 doi:10.1007/s00126-008-0191-5 | Journal (article/letter/editorial) | | Interaction of magma with sedimentary wall rock and magnetite ore genesis in the Panzhihua mafic intrusion,...fayalite–magnetite–quartz buffer (FMQ) to FMQ+1.5. From experimental constraints on magnetite saturation...controlled fO2, such an oxidizing event would allow magnetite to crystallize near to the liquidus, leading to...to the formation of the deposit. Keywords Magnetite ore . Oxygen fugacity . Skarn . Panzhihua . Emeishan...covered more than a million square kilometres in southwest China when it was emplaced about 258 million years |  | | Journal (article/letter/editorial) | | olivine (Fo84 ), opaque phases (mainly chromite and magnetite), and 76 clinopyroxene, surrounded by mica (Dawson...89 separates from mantle xenoliths from of the Cameroon Line, which have 90 previously been studied...canic centres in Cameroon: (1) olivine from C235A, Lake Baronbi Mbo 95 near Mount Cameroon; (2) orthopyroxene...orthopyroxene from C273Q, Lake Enep near 96 Oku in Cameroon; (3) olivine, orthopyroxene and clinopyroxene...clinopyroxene from P13, 97 Ngaoundere Plateau, Cameroon (Lee et al., 1996). Two mineral megacrysts, 98 garnet |
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