ファイル
言語
英語
著者
Miguta Faustine Ngulimi
内容記述(抄録等)
Geochemical compositions of surface to shallow soil samples of Manyoni uranium deposit in Tanzania were determined by X-ray fluorescence analysis (XRF). Uranium, calcium and chlorine are abundant at the depth of 40 cm to 140 cm. Strong correlations between U, CaO and chlorine suggest uranium and carbonates deposition in a Salt Lake system. Strontium content is higher (370 to 480 ppm) than the average upper continental crust UCC (320 ppm) at the depth of 60 cm to 120 cm suggesting Sr accumulation in carbonates. TiO2 and Fe2O3
abundances appear along the profile but have normal concentrations below the average UCC content. Vanadium is positively correlated to Fe2O3 and Ni (mafic sources) concentrations and negatively correlated to U. Uranium precipitation is suggestive of abrupt evaporation during dry season at Manyoni depositional basin. Chlorine (Cl) with high concentration in the vertical profile may be yielded in the sediments after evaporation of the lake water.
掲載誌名
Earth Science Research
5
2
開始ページ
121
終了ページ
131
ISSN
1927-0542
ISSN(Online)
1927-0550
発行日
2016-6-20
DOI
出版者
Canadian Center of Science and Education
資料タイプ
学術雑誌論文
ファイル形式
PDF
著者版/出版社版
出版社版
部局
(旧組織)大学院総合理工学研究科 地球資源環境学領域