28 Mar 2017 61 Page 7 of 109 The World Bank Nigeria: Mineral Sector Support for copper, and rare earth elements [REEs]); Construction material/dimension (iv) geochemical studies; (v) equipment for mining, crushing, and milling
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mining of rare metal pegmatite of Oke-Ogun field, Sepeteri, Oyo state of Nigeria . radiation from the radioactive nuclides in the earth''s crust. The latter ground to fine grain size using a rock crusher and later sieved through a 2 mm sieve.
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de Kun, N., 1987, Mineral economics of Africa: New York, Elsevier, Developments in Economic Geology 22, p. 241-243. Möller, P., 1989a, Rare earth mineral
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