Mineralogy and geochemistry of the Ngaoundaba Crater Lake sediments, northern Cameroon: implications for provenance and trace metals status

Bessa, Armel Zacharie Ekoa; Armstrong‐Altrin, John S.; Fuh, Gentry Calistus; Betsi, Thierry Bineli; Kelepile, Tebogo; Ndjigui, Paul Désiré

doi:10.1007/s11631-021-00463-5

Cited by 19 publications

(2 citation statements)

References 56 publications

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“…CaO has a good association with MgO, MnO, Na 2 O, TiO 2 , and P 2 O 5 , indicating that it is related to carbonate minerals (Nagarajan et al 2017). In contrast to other major oxides, CaO has a negative correlation, particularly SiO 2 , Al 2 O 3 , Fe 2 O 3 , and K 2 O, signifying that carbonate minerals are the primary source of Ca (calcite), with no influence from detrital sources (Bessa et al 2021). As indicated by K-feldspar and plagioclase products in the studied shales, chemical weathering is responsible for the negative correlation between both K 2 O and Na 2 O (Nagarajan et al 2017).…”

Section: Correlation Analysis Using Statisticsmentioning

confidence: 97%

Biomarkers, stable carbon isotope, and trace element distribution of source rocks in the Orange Basin, South Africa: implications for paleoenvironmental reconstruction, provenance, and tectonic setting

Yelwa

Mustapha

Opuwari

et al. 2021

J Petrol Explor Prod Technol

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Aptian to Campanian sediments from the Western offshore to Central Orange Basin were studied by integrating molecular geochemistry, inorganic and isotopic studies to recognize their geochemical characteristics via the reconstruction of the Orange basin’s paleoweathering, paleosalinity, paleovegetation, paleoclimate, and tectonic records. Molecular analyses of both aliphatic and aromatic compounds reveal an input dominantly from a marine source. The source rocks accumulated in a reduced, anoxic, saline water column. Based on various biomarker proxies and vitrinite reflectance data, some samples are thermally mature to produce petroleum, while others are not. According to the V/Ni ratio, samples from the Orange Basin in South Africa are mainly anoxic, with only a few samples ranging from suboxic to anoxic. This is congruent with biomarker and isotope analyses that further indicate the presence of marine-derived source rocks with some terrestrial remains generating hydrocarbons. The investigated sediments are made up of intermediate igneous rocks that have undergone moderate chemical weathering. Geochemical figures on tectonic setting discriminant function diagrams revealed a continental rift of passive margin settings. As a result, the extrapolated crustal processes are directly analogous to the genesis and evolution of the Orange Basin, demonstrating Gondwana’s breaking up and the opening of the Atlantic Ocean Margin.

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Section: Correlation Analysis Using Statisticsmentioning

confidence: 97%

Biomarkers, stable carbon isotope, and trace element distribution of source rocks in the Orange Basin, South Africa: implications for paleoenvironmental reconstruction, provenance, and tectonic setting

Yelwa

Mustapha

Opuwari

et al. 2021

J Petrol Explor Prod Technol

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“…The geochemical features of alluvial sediments are governed by several factors such as source rock composition, palaeoclimate, maturity, transportation, weathering source conditions and tectonics (Taylor and McLennan, 1985;Tian et al, 2020;Huyan et al, 2021;Sababa et al, 2022). The morphology of alluvial sediments and the microtextures of their quartz grains give reliable information on the origin, the transport and the paleoenvironment (Hossain et al, 2020; Armstrong-Altrin et al, 2015; Ekoa Bessa et al, 2021a). The abundances of major and trace elements are important for they re ect the palaeoweathering, sediment types and their provenances (Garzanti et al, 2016;Hernández-Hinojosa et al, 2018;Hossain et al, 2017;Nesbitt and Young, 1984).…”

Section: Introductionmentioning

confidence: 99%

Alluvial sediments in Bol area (Lake Chad Basin): implications for source area-weathering and tectonic settings

Sababa,

Ekoa Bessa,

Aye

et al. 2023

J. Sediment. Environ.

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This paper discusses the source area-weathering and tectonic settings of alluvial sediments from Lake Chad Basin (LCB). The grain size distribution has been performed by the Robinson-Kӧln's pipetting method. An HACH-HQ11d brand electric pH meter measures the pH and Eh values. Some sand grains and aggregates were examined by scanning electron microscopy with an Energy Dispersive Spectroscopy. The bulk mineralogy was performed with X-TRA Thermo-ARL Diffractometer. The geochemistry of whole samples was assessed by X-ray Fluorescence Spectrometry. Four pro les constituted of different levels characterized by variation in colors and textures have been examined. The textural variation is linked to the alternation of wet and dry periods in the LCB. Microtextural observations reveal sub-rounded to angular particles with secondary silica precipitation on their surfaces. This suggests uvial transport and short periods of aeolian movements. The clayey and clayey sandy facies are dominated by kaolinite, quartz and illite while the sandy samples are dominated by quartz, kaolinite, illite, goethite and rutile. Amount major elements, SiO 2 , Al 2 O 3 and Fe 2 O 3 have the highest contents and this is consistent with the mineralogical composition. The sediments are mature and classi ed as Fe-shale, Fe-sand and (sub)litharenite. The sediments are formed under oxic paleoenvironmental conditions. The rock sources underwent variable degree of weathering which reveals the impact of climate change prevailing in LCB. The trace element distribution shows no chemical differentiation as a result of low sediment recycling. Most of the discriminant plots indicate a felsic nature of the original sources rocks. The samples plot in the elds of passive margin and collision in a lesser extent. The collision setting may be related to the complex history of felsic source rocks which derived from the Pan African orogeny and the Cameroon Volcanic Line activities.

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Mineralogy and Geochemistry of Marine Sediments in the Northeastern Gulf of Mexico

Ramos-Vázquez

Armstrong‐Altrin

Madhavaraju

et al. 2022

Geochemical Treasures and Petrogenetic Processes

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Mineralogy and geochemistry of the Ngaoundaba Crater Lake sediments, northern Cameroon: implications for provenance and trace metals status

Cited by 19 publications

References 56 publications

Biomarkers, stable carbon isotope, and trace element distribution of source rocks in the Orange Basin, South Africa: implications for paleoenvironmental reconstruction, provenance, and tectonic setting

Biomarkers, stable carbon isotope, and trace element distribution of source rocks in the Orange Basin, South Africa: implications for paleoenvironmental reconstruction, provenance, and tectonic setting

Alluvial sediments in Bol area (Lake Chad Basin): implications for source area-weathering and tectonic settings

Mineralogy and Geochemistry of Marine Sediments in the Northeastern Gulf of Mexico

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