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A study of radionuclides, metals and stable lead isotope ratios in sediments and soils in the vicinity of natural U-mineralisation areas in the Northern Territory

Frostick, Alison, Bollhofer, Andreas and Parry, David L. (2011). A study of radionuclides, metals and stable lead isotope ratios in sediments and soils in the vicinity of natural U-mineralisation areas in the Northern Territory. Journal of Environmental Radioactivity,102(10):911-918.

Document type: Journal Article
Citation counts: Scopus Citation Count Cited 3 times in Scopus Article | Citations

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IRMA ID 83093774xPUB137
Title A study of radionuclides, metals and stable lead isotope ratios in sediments and soils in the vicinity of natural U-mineralisation areas in the Northern Territory
Author Frostick, Alison
Bollhofer, Andreas
Parry, David L.
Journal Name Journal of Environmental Radioactivity
Publication Date 2011
Volume Number 102
Issue Number 10
ISSN 0265-931X   (check CDU catalogue  open catalogue search in new window)
Scopus ID 2-s2.0-79961129510
Start Page 911
End Page 918
Total Pages 8
Place of Publication United Kingdom
Publisher Elsevier Ltd
HERDC Category C1 - Journal Article (DIISR)
Abstract Australian guidelines recommend that tailings materials from uranium (U) mining and milling be contained without any detrimental impact on the environment for at least 1000 years. Natural analogue sites are being investigated to determine if they can provide data on the rates of natural erosion processes which occur over these timescales, for input into predictive geomorphic computer models. This paper presents radionuclide, metal and stable lead (Pb) isotope data from sediment cores and surface soils in the vicinity of two mineralised areas in the Alligator Rivers Region. Surface scrapes from the natural Anomaly #2, south of the Ranger mineral lease, exhibit radiogenic 206Pb/ 207Pb and 208Pb/ 207Pb ratios, and elevated U and metal concentrations typical for a near surface U anomaly. In contrast, samples taken from the Koongarra mineral lease (KML) show radionuclide activity and metal concentrations similar to natural areas elsewhere in the Alligator Rivers Region and Pb isotope ratios are closer to present day average crustal ratios (PDAC), as the orebodies at KML are covered by surficial sand. A sediment core collected from Anbangbang Billabong, downstream of KML, exhibits small variations in Pb isotope ratios that indicate that approximately 1% of the upper sediments in the sediment core may be derived from material originating from the U anomaly at Koongarra.
Keywords Alligator Rivers Region
radionuclides
stable lead isotopes
trace metals
uranium mining
DOI http://dx.doi.org/10.1016/j.jenvrad.2010.04.003   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
 
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Created: Fri, 29 Aug 2014, 17:11:09 CST by Anthony Hornby