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    • Keywords


      Uranium; interpolation; kriging; Mahadek sandstone; lithology; primordial radio-nuclide

    • Abstract


      This paper discusses an experimental approach to examine uranium exploration avenue over the geologicallyextended parts of Mahadek basin in Meghalaya, amid some of the environmental constraints. Studycomprises periodic measurements of prevailing ambient gamma levels across 320 georeference points, inrelation to the major litho units of Mahadek basin, covering 673 line km of Khasi Hills. Acquired sampledata points were then analysed in geostatistical software (Surfer^{TM}) to develop analytical model of samplevariogram having bearing on the uranium exploration in the area. Study findings have given encouragingsurface indicators with mostly elevated gamma levels over the parts of West Khasi Hills. Delineatedgamma anomalous zones are lithologically well correlated including to that of existing uranium occurrencesin the basin. Identified anomalous zones over the parts of West Khasi Hills by this study work, aremainly associated with the Mahadek sandstone (Upper and Lower Mahadek) and Precambrian basementgranites. Lower Mahadek sandstone is host rock for uranium mineralisation in the basin. Initial findingssuggest with the closer spatial resolution (∼1 km) of sample data points, the approach adopted by thestudy work holds promising application in locating potential uranium exploration targets especially tothe extended and inaccessible parts of the basin.

    • Author Affiliations


      B M Kukreti1 G K Sharma2 Pramod Kumar3 Sandeep Hamilton4

      1. Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India.
      2. Atomic Minerals Directorate for Exploration and Research, West Block -7, R.K. Puram, New Delhi 110 066, India.
      3. Atomic Minerals Directorate for Exploration and Research, AMD Complex, Tata Nagar, Jharkhand 831 002, India.
      4. AMD Complex Nongmynsong, Shillong, Meghalaya, India.
    • Dates

  • Journal of Earth System Science | News

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