| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1877717 | Applied Radiation and Isotopes | 2012 | 5 Pages |
Non-coring based exploratory drilling was under taken in the sedimentary environment of Rangsohkham block, East Khasi Hills district to examine the eastern extension of existing uranium resources located at Domiasiat and Wakhyn in the Mahadek basin of Meghalaya (India).Although radiometric survey and radiometric analysis of surface grab/channel samples in the block indicate high uranium content but the gamma ray logging results of exploratory boreholes in the block, did not obtain the expected results. To understand this abrupt discontinuity between the two sets of data (surface and subsurface) multivariate statistical analysis of primordial radioactive elements (K40, U238 and Th232) was performed using the concept of representative subsurface samples, drawn from the randomly selected 11 boreholes of this block.The study was performed to a high confidence level (99%), and results are discussed for assessing the U and Th behavior in the block. Results not only confirm the continuation of three distinct geological formations in the area but also the uranium bearing potential in the Mahadek sandstone of the eastern part of Mahadek Basin.
► Use of representative subsurface samples concept in assessing U potential. ► Behavior study on subsurface K40 , U238 and Th232 radio elements. ► Validation of favorable distinct geological formation in the area. ► Understanding of discontinuity between surface data and boreholes gamma logs. ► Implication on U bearing potential in the eastern part of Mahadek Basin.
