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Scirj Volume V, Issue XI, November 2017 Edition
ISSN: 2201-2796

Geochemical characteristics of the Neoproterozoic Anyaboni sandstone of the southeastern Voltaian Basin, Ghana

Mahamuda Abu , Musah Saeed Zango

Abstract: The current study presents geochemical characteristics of twenty six samples of the Anyaboni sandstones collected from Anyaboni, Apimso, Asesewa and Ayilesu areas of the southeastern Voltaian Basin (VB) of Ghana in order to identify the source, estimate chemical weathering and decipher tectonic settings through discrimination plots. The samples can be grouped broadly into subarkose and sublitharenites with quartzarenite signatures and they are weak to moderately weathered under semi - humid climatic conditions. They are compositionally matured (SiO2/Al2O3 = 16.8 - 58) with higher Th/U (5.8) compared to upper continental crust (UCC). The geochemistry points largely to a felsic source rock with minor influence of mafic rocks similar to the granitic and metasedimentary rocks of the Birimian Group. The tectonic setting is dominantly passive margin with imprints of an active continental margin setting. Cr/V versus Sc/La diagrams can be used to decipher the source of clastic sediments however, not suitable for tectonic settings from the study. The study also identifies that using only geochemical discrimination diagrams has the possibility of giving multiple source/tectonic settings of the same samples hence there is the need to couple geochemical studies with petrographic studies and possibly with the sediments field relations.

Reference this Paper: Geochemical characteristics of the Neoproterozoic Anyaboni sandstone of the southeastern Voltaian Basin, Ghana by Mahamuda Abu , Musah Saeed Zango published at: "Scientific Research Journal (Scirj), Volume V, Issue XI, November 2017 Edition, Page 54-65 ".

Search Terms: chemical facies, chemical conditions, neoproterozoic, source, southeastern Ghana, tectonic setting

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