| Developing a correlation index and U disequilibrium factor for the exploratory boreholes in Wahkut block of West Khasi Hills district, Meghalaya (India). | |
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MedLine Citation:
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PMID: 23202436 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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With the objective to affirm the apparent uranium ore zone grade/thickness with good confidence for the non-cored as well as those boreholes with poor core recovery in the sedimentary environment of Wahkut block, West Khasi Hills district of Meghalaya, a systematic study between the in situ measured γ-ray logs under field conditions and laboratory analyzed core assay under controlled conditions has been carried out. The study area spans 2sqkm having 33 cored and 39 non-cored boreholes with a cumulative drilled depth of about 11,000m. On this available cored borehole database, simultaneous uranium ore zone continuity, both for in situ γ-ray logs and radiometric core assay, was evaluated with the experimental parameters of 1.0m ore zone thickness at 0.010% eU(3)O(8) cut off grade. A population of 18 such simultaneous qualifying zone (borehole log and core assay) across the 15 cored boreholes gave a grade thickness continuity index of 0.92 with a moderately strong relationship between the radiometric core assay and the in situ γ-ray logs. After validation of an in situ uranium ore zone, study boreholes were examined for their uranium disequilibrium status by fitting regression equations for the radiometric U(3)O(8)(β/γ) and spectrometric radium measurements, done on the borehole core samples. A parent favoring uranium disequilibrium was observed in the sedimentary environment of Wahkut block, with a log normal distribution. An average uranium disequilibrium factor 1.46±0.245 was estimated for the 19 study boreholes, across the block. |
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Authors:
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B M Kukreti; Pramod Kumar |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-10-9 |
Journal Detail:
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Title: Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine Volume: 72C ISSN: 1872-9800 ISO Abbreviation: Appl Radiat Isot Publication Date: 2012 Oct |
Date Detail:
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Created Date: 2012-12-3 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9306253 Medline TA: Appl Radiat Isot Country: - |
Other Details:
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Languages: ENG Pagination: 6-10 Citation Subset: - |
Copyright Information:
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Copyright © 2012 Elsevier Ltd. All rights reserved. |
Affiliation:
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Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Nongmynsong, Shillong 793019, Meghalaya, India. Electronic address: bharatkuk@gmail.com. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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