Geochemistry and petrography of beach sands along the western coast of Ghana: implications for provenance and tectonic settings

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dc.authoridAbu, Mahamuda/0000-0002-2333-2708
dc.authoridSunkari, Emmanuel Daanoba/0000-0002-0898-2286
dc.contributor.authorAbu, Mahamuda
dc.contributor.authorSunkari, Emmanuel Daanoba
dc.date.accessioned2024-11-07T13:31:30Z
dc.date.available2024-11-07T13:31:30Z
dc.date.issued2020
dc.departmentNiğde Ömer Halisdemir Üniversitesi
dc.description.abstractThe paleoweathering, provenance, and tectonic setting of sediments of the western coast of Ghana were unraveled using the geochemistry of 29 beach sands, which are characterized by coarse-, medium-, and fine-grained sizes. The coarse-grained beach sands contain higher SiO2 content (2.9-96 wt.%) than the medium-grained (4.9-94 wt.%) and fine-grained (16.1-90.7 wt.%) sands, implying that the increase in grain size is related to the increase in SiO2 content. Al2O3 and CaO concentrations are higher in the fine- and medium-grained sands than the coarse-grained sands. The beach sands are compositionally immature based on the index of compositional variable values (1.17-141) and Th/Sc versus Zr/Sc diagram although they have high SiO2/Al2O3 values. The high SiO2/Al2O3 is not indicative of the weathering conditions of the coastal sediments in the area. The sands are chemically unaltered clastic materials of first cycle regime that still have their labile minerals retained in them very close to the sediment source based on the chemical index of alteration values, plagioclase index of alteration values, and A-CN-K and A-CNK-FM ternary diagrams. The total rare earth elements (Sigma REE) content increases with decreasing grain size. However, there are some discrepancies where some coarsegrained samples have high Sigma REE content. This suggests that apart from the grain size, the provenance of the sediments has direct control over their geochemical composition. The correlation of the rare earth elements patterns of the beach sands with those of adjacent source rocks points to felsic sources for their derivation. The felsic (granodioritic composition) igneous suites of the Paleoproterozoic Birimian highland rocks adjacent to the beach sediments in the western coast are possibly the source rocks of the beach sands. Rifting in the continents is the tectonic regime probably during the Paleoproterozoic times responsible for deposition of the beach sands in the western coast of Ghana.
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TUBITAK)
dc.description.sponsorshipThe authors appreciate the valuable help rendered by Mr. Patrick Sunchullo BAYOWOBIE and Elizabeth Nyarko of CWSA, Kumasi during the field studies and preparation of a detailed geological map of the study area. The second author also thanks the Scientific and Technological Research Council of Turkey (TUBITAK) for the continuous support during the time of this research as a doctoral research fellow of BIDEB 2215 Graduate Scholarship Program for International Students. We acknowledge the useful reviews by the anonymous Reviewers and the Editor, which improved the quality of the paper.
dc.identifier.doi10.3906/yer-1903-8
dc.identifier.endpage380
dc.identifier.issn1300-0985
dc.identifier.issue2
dc.identifier.scopus2-s2.0-85078459961
dc.identifier.scopusqualityQ2
dc.identifier.startpage363
dc.identifier.trdizinid335398
dc.identifier.urihttps://doi.org/10.3906/yer-1903-8
dc.identifier.urihttps://search.trdizin.gov.tr/tr/yayin/detay/335398
dc.identifier.urihttps://hdl.handle.net/11480/14873
dc.identifier.volume29
dc.identifier.wosWOS:000508872500008
dc.identifier.wosqualityQ4
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakTR-Dizin
dc.language.isoen
dc.publisherTubitak Scientific & Technological Research Council Turkey
dc.relation.ispartofTurkish Journal of Earth Sciences
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_20241106
dc.subjectBeach sands
dc.subjectgeochemistry
dc.subjectprovenance
dc.subjecttectonic setting
dc.subjectwestern coast
dc.subjectGhana
dc.titleGeochemistry and petrography of beach sands along the western coast of Ghana: implications for provenance and tectonic settings
dc.typeArticle

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