Regional characteristics of naturally occurring radionuclides in surface sediments of Chinese deserts and the Keum River area of Korea |
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| Authors: | K Y Lee Y Y Yoon S Y Cho K S Ko and Y Kim |
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| Institution: | (1) Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources (KIGAM), 92 Gwahang-no, Yuseong-gu, Daejeon, 305-350, Korea |
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| Abstract: | Naturally occurring radionuclides (NORN) such as 40K, 226Ra and 232Th from 44 surface sediment samples collected from four desert regions of Chinese were determined to investigate the regional
characteristics of the source areas of Asian dust. The radionuclides for 41 surface sediment samples collected from seven
sites of the Keum River area in Korea were also determined to compare the regional characteristics with the Chinese desert
area. The specific activities (SA) and the specific activity ratios (SAR) of the radionuclides were investigated for distinguishing
the source region of Asian dust. The SA of 226Ra and 232Th as well as the SAR of 226Ra/40K and 232Th/40K were found to be useful to characterize source area and tracing Asian dust. |
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| Keywords: | Naturally occurring radionuclide China deserts Keum river Specific activity Regional characteristics |
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