| Bowden, P., Bennett, J. N., Kinnaird, Judith A., Whitley, J. E., Abaa, S. I., Hadzigeorgiou-Stavrakis, Penelope K. (1981) Uranium in the Niger-Nigeria Younger Granite Province. Mineralogical Magazine, 44 (336) 379-389 doi:10.1180/minmag.1981.044.336.03 | Journal (article/letter/editorial) | 1981, VOL. 44, PP. 379 89 Uranium in the Niger-Nigeria Younger Granite Province P. BOWDEN, J. N. BENNETT...Department of Geology, Ahmadu Bello University, Zaria, Nigeria PENELOPE K. HADZIGEORGIOU-STAVRAKIS Department...sedimentary uranium deposits may also be found in Nigeria if the tectonic and sedimentological controls were...rocks associated with the Tarrouadji alkaline ring complex which is the southern-most of a chain of such structures...sodium and uranium, possibly as a sodium-uranyl complex (Bowie, 1979), and which have undergone variable | | | Journal (article/letter/editorial) | to the Lava Creek B ash bed of the Yellowstone complex (G. A. Izett, pers. comm., 2000). Associated phases...the average of 22 points. The Timedjelalen ring-complex is part of the Iforas alkaline province of Mali...shield and the West African craton 600 Ma ago. The complex comprises six principal concentric phases, T1 T6...47 12.47 21.73 2.01 7.00 P22 (1) (L) Chikala complex Malawi TABLE 1. New chemical analyses and structural...1986) and c/p from the Greater Olkaria Volcanic Complex, Kenya (0.04; Macdonald et al., 2002). Reed (1986) |
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