Baossi–Warack monogenetic volcanoes, Adamawa Plateau, Cameroon: petrography, mineralogy and geochemistry

Tiabou, Anicet Feudjio; Temdjim, Robert; Wandji, Pierre; Bardintzeff, Jacques-Marie; Bih, Vivian; Tibang, Edith Ekatah Bate; Ngwa, Caroline Neh; Mebara, François Xavier Onana

doi:10.1007/s11631-018-0272-9

Cited by 13 publications

(4 citation statements)

References 91 publications

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“…These lavas range from basalts and basanites to more evolved felsic such as phonolites, rhyolites and trachytes ( Sato et al., 1990 ; Marzoli et al., 2000 ; Kamgang et al., 2013 ; Asaah et al., 2015 ). The northern part of the CVL comprises the Mandara Mountains and large volcanic plateaus including Bui, Kapsiki and Ngaoundere made of alkaline basanites and basalts below phonolitic and trachytic flows ( Marzoli et al., 1999 ; Nkouandou and Temdjim, 2011 ; Tiabou et al., 2019 ; Dedzo et al., 2019 ). Its southern continental part is marked by a succession of volcanic massifs (Mount Cameroon, Mount Rumpi, Mounts Manengouba, Mounts Bambouto and Mount Oku) ( Figure 1 a).…”

Section: Geological Settingmentioning

confidence: 99%

“…Thus, it is known that the alkaline lavas, along the CVL differentiated into basalts and basanites, show similarities with Ocean Island Basalts (e.g., Tchuimegnie et al., 2015 ; Mbowou et al., 2020 ; Tchop et al., 2020 ). In the same vein, the geochemical features of rocks relate them to a mantle source (e.g., Tchamabe et al., 2014 ; Marzoli et al., 2015 ; Asaah et al., 2015 ; Ngwa et al., 2017 ; Dedzo et al., 2019 , 2020 ; Tiabou et al., 2019 ). Other studies on scoriae from the Cameroon Volcanic Line have been devoted to the industrial use of scoriae from a specific locality or two at most.…”

Section: Introductionmentioning

confidence: 99%

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Petrological features of volcanic scoriae from the southern part of the Cameroon Volcanic Line and their supplementary cementations application

Onana

Gentry

Ndjigui

2022

Heliyon

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Volcanic scoriae from the southern part of the Cameroon Volcanic Line (Limbé, Loum-Tombel, Yamba, Doupé, Njinkouo, Foumbot, Manjo-manengollé, Galim and Djoungo) were investigated in order to determine their chemical and mineralogical composition, to deduce their origin and to identify their natural characteristics which may be useful to the cement industry. The mineralogical composition was determined by X-ray Diffractometer (XRD); X-ray Fluorescence (XRF) and Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) instruments provided geochemical data. In order to establish the relationship between the natural characteristics of volcanic scoriae and the properties of cements, the amount of amorphous phases was determined by dissolution using sodium hydroxide solution and the pozzolanic activity by thermogravimetric analysis. Field observations show that these rocks are basalts, basanites, hawaiites and picrobasalts. Their mineralogical composition includes augite, olivine, plagioclase, enstatite, feldspars, ettringite, portlandite and Fe–Ti minerals. Overall, they are characterized by high MgO, Fe 2 O 3 , CaO, and TiO 2 contents. The behavior of major and trace elements suggests that volcanic scoriae have an evolution dominated by partial melting. Besides, high chondrite normalized La/Yb (8–22), Tb/Yb (>1.9) and Dy/Yb (>2) values suggest that the melting corresponds to the garnet lherzolite stability field. The scoriae exhibit good pozzolanic reactivity after 28 days according to their considerable amount of amorphous phases, low CaO contents and their large specific surface area. According to ASTM C618 standard, the sum of SiO 2 , Al 2 O 3 and Fe 2 O 3 (SAI = 65.96–76.34 wt.%); LOI (-0.1–16.99 wt.%), and of CaO, Fe 2 O 3 and MgO (CIM = 23.43–34.06 wt.%) suggest that those less weathered materials seem appropriate as an additive in cement manufacture. The suitable use of volcanic scoriae in the cement industry closely depends on the petrological features of amorphous phases.

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Section: Geological Settingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Petrological features of volcanic scoriae from the southern part of the Cameroon Volcanic Line and their supplementary cementations application

Onana

Gentry

Ndjigui

2022

Heliyon

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“…These rocks occur in the form of veins and, most importantly, in the form of very extensive but relatively thin flows that are strongly damaged by erosion and alteration. The emission types are fissural or Hawaiian, Vulcanian, and Strombolian [39]. The ages of lavas vary from Oligocene [40] to Mio-Pliocene [41, 42] [43] and Pleistocene [44] in the Ngaoundéré area.…”

Section: Geological Outlinementioning

confidence: 99%

Subsurface Tectonic Inferences of the Adamawa Region of Cameroon from EMAG2 Magnetic Data

Njeudjang

Yandjimain

Bouba

et al. 2022

International Journal of Geophysics

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The study area includes an area between 6° to 8°N and 11° to 15°E. Geologically, it belongs to Precambrian basement (granites, gneisses), Proterozoic, and Archean (volcanic) series, showing the main heat sources of Cameroon. The purpose of this study deals to analyze and interpret the EMAG2 magnetic data in the Adamawa area using various advanced processing techniques. Thus, the mapping and depth estimation of underground structures are realized. The analysis of aeromagnetic map of the reduction to equator (RTE) in Adamawa area reveals rapidly evolving subsurface geological presented its lithological and structural. In the same, the power spectrum-processing tool clearly emphasizes shallow and deep underground heat sources. Two magnetic source location methods (source parameter imaging and analytical signal) are used to characterize of the source. The estimated magnetic source depths from source parameter imaging (SPI) are between 0.3 km and 22 km. The analytical signal ranges from 0.2 km to 31 km. In addition, the comparative study of 2D magnetic modelling showed that the basement is affected by the faults in the main directions of N-S, NE-SW, NW-SE, and WNW-ESE. The resulting structural map based on the tectonic map of Adamawa magnetic basement is a document that can simplify future hydrological and geothermal exploration.

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“…Os grandes planaltos vulcânicos de Ngaoundéré, Kapsiki, Biu e Mandara, caracterizam a região norte da LVC. O planalto de Ngaoundéré é formado por basanitos e basaltos alcalinos cobertos por fluxos fonolíticos e traquíticos (Marzoli et al, 1999;Nkouandou and Temdjim, 2011;Gountié Dedzo et al, 2019;Tiabou et al, 2019). O planalto de Biu compreende lavas basaníticas a basálticas de transição (Rankenburg et al, 2005), enquanto que, no de Kapsiki, há um predomínio alcalino, composto por lavas félsicas e lavas máficas (Ngounouno and Deruelle, 1997;Tamen et al, 2015).…”

Section: Contexto Petrográfico Da Linha Vulcânica Dos Camarõesunclassified

Geocronologia Ar-Ar e geoquímica isotópica de rochas das Ilhas de Ano-Bom, São Tomé e Príncipe da Linha Vulcânica dos Camarôes

Lopes¹

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Este trabalho é fruto de um sonho coletivo, no qual fui incumbido de o tornar real. As espectativas foram enormes, a caminhada longa e o final dramático. Num ano que muito prometeu, mas o inesperado aconteceu, não excluindo ninguém e deixando cicatrizes em todos que vivenciaram esta pandemia. No entanto, há muito que agradecer à todos que me deram suporte nesta segunda jornada no Brasil. Gratidão ao Brasil e São Tomé e Príncipe pela cooperação, ao IGc-USP pela oportunidade de continuar enriquecendo meus conhecimentos, ao CNPq por financiar a pesquisa (processo 190347/2017-1), ao CPGeo por financiar o trabalho de campo nas ilhas e aos técnicos dos laboratórios do IGc-USP pelo apoio. Deixo expressa minha gratidão ao amigo e professor Dr Umberto Cordani, que foi mais do que um orientador, foi como pai nesses 24 meses, dando suporte e guiando nos trilhos da geologia. À Profa. Dra Maria Helena Hollanda, pelo suporte durante todo o percurso, principalmente na contribuição na conclusão do estudo da geocronologia, e ao Prof. Dr Rogério Azzone pela inestimável contribuição dos seus conhecimentos na geoquímica e na conclusão da pesquisa, meus agradecimentos.

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Baossi–Warack monogenetic volcanoes, Adamawa Plateau, Cameroon: petrography, mineralogy and geochemistry

Cited by 13 publications

References 91 publications

Petrological features of volcanic scoriae from the southern part of the Cameroon Volcanic Line and their supplementary cementations application

Petrological features of volcanic scoriae from the southern part of the Cameroon Volcanic Line and their supplementary cementations application

Subsurface Tectonic Inferences of the Adamawa Region of Cameroon from EMAG2 Magnetic Data

Geocronologia Ar-Ar e geoquímica isotópica de rochas das Ilhas de Ano-Bom, São Tomé e Príncipe da Linha Vulcânica dos Camarôes

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