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<p>Textural, mineralogical, and radio elemental properties of the Jadukata and Chalti river sediments of northeastern Bangladesh were characterized to infer their depositional environment, distribution and mineralogical composition of heavy mineral, and paleo-oxidation condition. The studied samples were coarse to fine grained and moderately well sorted to poorly sorted, deposited in riverine environments hosting uranium. Average heavy mineral concentration was 3.28% and 14.35% in Jadukata and Chalti river respectively, and predominantly comprised of garnet, zircon, kyanite, epidote, pyroxene, magnetite, hornblende, rutile, and chlorite. The average <sup>226</sup>Ra (<sup>238</sup>U) (6.82 and 7.71&#xa0;ppm) and <sup>232</sup>Th (13.23 and 15.33&#xa0;ppm) concentrations for Jadukata and Chalti river samples exceeded the Upper Continental Crust (UCC) value. Elemental eU/eTh and eTh/eU ratios described an oxic depositional environment, as well as uranium enrichment over crust composition.</p>

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Textural, mineralogical and radioelemental characterization of Jadukata and Chalti river sediments, Sunamganj, north-east Bangladesh

  • 期刊论文

  • 发表日期：

    2025年7月3日

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  • Nafisa Tamannaya Dina,
  • Farah Deeba,
  • Mohammad Zafrul Kabir,
  • Sudeb Chandra Das,
  • Mohammad Rajib,
  • Md. Golam Rasul,
  • Md. Moniruzzaman,
  • Tumpa Saha,
  • Mohammed Nazrul Islam Khan,
  • Md. Mahbubul Haque

摘要

Textural, mineralogical, and radio elemental properties of the Jadukata and Chalti river sediments of northeastern Bangladesh were characterized to infer their depositional environment, distribution and mineralogical composition of heavy mineral, and paleo-oxidation condition. The studied samples were coarse to fine grained and moderately well sorted to poorly sorted, deposited in riverine environments hosting uranium. Average heavy mineral concentration was 3.28% and 14.35% in Jadukata and Chalti river respectively, and predominantly comprised of garnet, zircon, kyanite, epidote, pyroxene, magnetite, hornblende, rutile, and chlorite. The average 226Ra (238U) (6.82 and 7.71 ppm) and 232Th (13.23 and 15.33 ppm) concentrations for Jadukata and Chalti river samples exceeded the Upper Continental Crust (UCC) value. Elemental eU/eTh and eTh/eU ratios described an oxic depositional environment, as well as uranium enrichment over crust composition.