Isotope geochemistry as a tool in the exploration of gold occurrences in Ghana: a review

Kazapoe, Raymond Webrah; Okunlola, Olugbenga A.; Arhin, Emmanuel; Olisa, Olusegun

doi:10.1007/s12517-021-08297-4

Cited by 3 publications

(1 citation statement)

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“…In the Sefwi-Bibiani Greenstone Gold Belt, gold mining and prospecting have a rich history. The Belt contains some of the most renowned mines, such as the Chirano, Kenyasi, and Bibiani mines (Griffis et al 2002; Kazapoe et al 2021). On the Belt, there are a few small to medium-sized businesses whose exploration and mining operations are in varying stages of development and success (Griffis et al 2002).…”

Section: Geology Of the Abansuoso Depositmentioning

confidence: 99%

Compositional characteristics of mineralised and unmineralised gneisses and schist around the Abansuoso area, southwestern Ghana

Kazapoe

Okunlola

Arhin

et al. 2023

Applied Earth Science

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Gold-bearing granitoid deposits have recently been discovered in the Birimian of Ghana but their mode of formation and ore genesis remain enigmatic. This study presents petrographic, and geochemical characteristics of mineralised and unmineralised (gold grade >0.05 and <0.05 g/t respectively) granitoids (now gneisses) and schists (metasedimentary) to evaluate their petrogenesis/provenance, and relationship to gold mineralisation in the Abansuoso area. The unmineralised rocks comprise biotite-and hornblende-biotite gneisses, sericite-quartz, carbonate-sericite, and biotite-quartz schist. The mineralised varieties are biotite-, muscovite gneiss, iron-carbonate-sericite, carbonate-sericite-quartz, chloritecarbonate, and biotite-carbonate schist. The mineralised and unmineralised gneisses are both metaluminous and peraluminous. Both mineralised and unmineraised gneiss and schist show Nb-Ta trough, depleted LILE and enriched HFSE although widespread overall trace element concentrations for the mineralised rocks on UCC-normalised multi-element diagram, suggestive of their formation in an arc setting. This suggests coeval granitic plutonism and sedimentation with subduction-accretion during the Eburnean orogeny, hence, mineralisation may be orogenic-type.

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Section: Geology Of the Abansuoso Depositmentioning

confidence: 99%