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Preliminary Survey for Uranium in Cretaceous Sandstones of Bonako-Sole Areas, Ngondo Complex, Southwestern Cameroon
Earth Sciences
Volume 6, Issue 1, February 2017, Pages: 1-9
Received: Jan. 3, 2017; Accepted: Jan. 18, 2017; Published: Feb. 27, 2017
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Juliana Amboh Tifang, Institute of Geological and Mining Research, Yaounde, Cameroon
Cheo Emmanuel Suh, Department of Geology, University of Buea, Buea, Cameroon
Ekah Nzume Ndimeh, Department of Geology, University of Yaounde 1, Yaounde, Cameroon
Ze Achille Desire, Institute of Geological and Mining Research, Yaounde, Cameroon
Mero Yannah, Institute of Geological and Mining Research, Yaounde, Cameroon
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Unconformity-type uranium deposits are characterized by mineralization developed along the contact between younger sandstone cover and underlying crystalline basement rocks. Twenty-five sandstone samples were collected at the Ngondo Complex of southwestern Cameroon along the unconformity contact from Bonako through Nyanga to Sole. Petrographic studies on thin sections revealed the presence of sub-rounded to angular quartz grains (80% grains) and ferruginous cement (20% cement). Some quartz grains also showed evidence of deformation. Radioelement concentrations for U, Th and K were determined by gamma-ray spectrometry. The samples showed the various element concentration ranges; 0.0-3.3ppm U, 5.5-11.1ppm Th and 0.1-1.3% K. Variations in the U, Th and K concentration in the sandstone is related to the bedrock geology. The sandstones were also analysed for 21 associated elements using an X-ray fluorescence analyzer. Most of the samples showed moderate concentrations of CaO, Fe2O3, MgO, TiO2, K2O, Zr, Sr, Nb, Cr and V. Matrix of Pearson’s correlation shows positive correlation between the following; U/Zn; U/Sc, V, Cr; U/Ti; Zn/Nb, Ba, TiO2; Zn/Zr, V/Zn, Rb, Cr, Ba. These reflect the geology of the study area and also suggest the presence of heavy mineral phases like zircon, monazite, rutile.
Unconformity-type, Uranium, Ngondo Complex, Cameroon
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Juliana Amboh Tifang, Cheo Emmanuel Suh, Ekah Nzume Ndimeh, Ze Achille Desire, Mero Yannah, Preliminary Survey for Uranium in Cretaceous Sandstones of Bonako-Sole Areas, Ngondo Complex, Southwestern Cameroon, Earth Sciences. Vol. 6, No. 1, 2017, pp. 1-9. doi: 10.11648/
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