Abstract
The natural activity of 238U, 232Th and 40K present in soil, fertilizer and palaeosols besides animal fossils was determined using low background gamma ray spectrometry. The highest uranium activity level were found in animal fossils of geogenic origin compared to palaeosols, soils and fertilizers, a result of post-mortem uranium assimilation in these fossils via diagenetic processes. Hence, geogenic mobilization is likely a major cause of elevated uranium levels in Malwa region of Punjab, also known for higher than normal cancer incidence.
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