Application of the Weibull extrapolation to 137Cs geochronology in Tokyo Bay and Ise Bay, Japan.
Considerable doubt surrounds the nature of processes by which 137Cs is deposited in marine sediments, leading to a situation where 137Cs geochronology cannot be always applied suitably. Based on extrapolation with Weibull distribution, the maximum concentration of 137Cs derived from asymptotic values for cumulative specific inventory was used to re-establish 137Cs geochronology, instead of original 137Cs profiles. Corresponding dating results for cores in Tokyo Bay and Ise Bay, Japan, by means of this new method, are in much closer agreement with those calculated from 210Pb method than the previous method.
Lu
Xueqiang
X
Division of Earth and Environmental Science, Graduate School of Environmental Studies, Nagoya University, 1 Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan. xueqianglu@yahoo.com
D002588:Cesium Radioisotopes; D005720:Gamma Rays; D019015:Geologic Sediments / Q000032:analysis*; D055593:Geological Phenomena; D005844:Geology; D007564:Japan; D007856:Lead Radioisotopes; D008962:Models, Theoretical; D009792:Oceans and Seas; D013997:Time Factors
D002588:Cesium Radioisotopes; D007856:Lead Radioisotopes