Journal of Geosciences and Geomatics
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Journal of Geosciences and Geomatics. 2015, 3(2), 28-36
DOI: 10.12691/jgg-3-2-1
Open AccessArticle

Lead Reservoirs and Metallization in Nigeria: Example of a Contrasting Geological Terrains

Silas Dada1, Onema Adojoh2, , Adisa Rahaman3 and Ibrahim Garba4

1Kwara State University, Department of Geology, Malete, P.M.B 1530 Ilorin, Nigeria

2University of Liverpool, School of Environmental Sciences, Department of Geography, Earth and Ecological Sciences, Roxby Building, Room 805 B, L69 7ZT, UK

3Obafemi Awolowo University, Department of Geology, Ile-Ife, Nigeria

4Kano State University of Science and Technology, Department of Geology, P.M.B 3244, Wudil, Nigeria

Pub. Date: April 13, 2015

Cite this paper:
Silas Dada, Onema Adojoh, Adisa Rahaman and Ibrahim Garba. Lead Reservoirs and Metallization in Nigeria: Example of a Contrasting Geological Terrains. Journal of Geosciences and Geomatics. 2015; 3(2):28-36. doi: 10.12691/jgg-3-2-1

Abstract

Whole rock and mineral extracts from Nigerian goldfields of late Proterozoic age are significantly more radiogenic than those from the much younger Mesozoic lead-zinc mineralization in the Benue Trough, their common formation by hydrothermal processes notwithstanding. Their marked contrasts in lead isotope compositions can be attributed to differences in source reservoirs, structural settings and geological history rather than their age of mineralization. The Mesozoic sulphides have a remarkable uniformly unradiogenic composition for their age, placing the deposits in the lower crustal geotectonic environment that indicate a source of much lower µ. In contrast, mineral extracts from the southwestern and northwestern Nigeria gold deposits show increasingly radiogenic composition and plot in the mixed and upper crustal geotectonic fields respectively, typical of sources enriched in U/Pb and Th/Pb ratios, with clear indication of larger upper crustal reservoir of much higher µ. Therefore, exploration efforts may need to emphasize near-source mineralization prospects of low radiogenic Pb composition for economic deposits.

Keywords:
lead reservoirs metallization U/Pb and Th/Pb ratios Benue trough economic deposits

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