Provenance, weathering, and tectonic setting of the Yoyo, Kribi, and Campo beach sediments in the southern Gulf of Guinea, SW Cameroon

Temgo Sopie, Francis; Ngueutchoua, Gabriel; Armstrong-Altrin, John S; Njanko, Théophile; Sonfack, Aristide Nadine; Ngagoum Kontchipe, Yannick Steve; Fossa, Daoud; Tawani Tembu, Lesly

doi:10.1007/s12040-023-02101-5

Cited by 4 publications

(1 citation statement)

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“…Average SiO2 concentration of gryphaea limestone is 6.56, whereas the average concentration of Al2O3 is 2.05. Al2O3 concentration may generally be attributed to a good mixture of transported flux and limited SiO2 may be due to less concentration of detrital unaltered quartz and feldspar contents (Ramasamy et al, 2007;Cox et al, 1995;Udayanapillai and Ganesamurthy, 2013;Ekoa Bessa et al, 2021a,b;Madhavaraju et al, 2021;Sopie et al, 2023). Gryphaea limestone represents less SiO2/Al2O3 ratio (3.22), which indicates that the detrital concentration of quartz and feldspar is limited in the samples.…”

Section: Geochemical Observationmentioning

confidence: 99%

Petrography and geochemistry of the Upper Cretaceous Gryphaea Limestones, Kallankurichi Formation, Ariyalur Group, Trichinopoly, Southern India: Implication for palaeoenvironment

Senthiappan,

Pitchaimani,

Udayanapillai

et al. 2023

JIAS

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Sub-surface Kallankurichi gryphaea limestone formation is observed between Archaean and Quaternary outcrops. Petrographic observation reveals that mega fossils are absent and it contains abundant skeletal fragments of pelecypods, gastropods, foraminifera, bryozoa, and symbiotic algae. X-ray diffraction (XRD) analyses reveal the mineralogical components of both carbonate and clay minerals. Carbonate minerals include calcite, siderite, witherite, malachite, smithsonite, and rhodochrosite. Clay minerals detected are kaolin, montmorillonite, and palygorskite. Major element composition represents predominance of CaO, SiO2, Al2O3, and Fe2O3 oxides, while MgO, MnO, Na2O, K2O, TiO2, and P2O5 oxides are depleted. Statistical analyses of correlation coefficient, principal component analysis, and cluster analysis represent the geochemical affinities and aerial distribution similarities among major elements. Palaeoclimate inferred through biotic proxies, major element geochemistry, and clay minerals represents arid and semi-arid climate.

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Section: Geochemical Observationmentioning

confidence: 99%