An Overview on the Application of 210Pb and 137Cs Dating in the Resear ch of Recent Sediment Accumulation Rate of Coastal Zone
Received date: 2006-08-01
Revised date: 2007-02-01
Online published: 2007-03-25
210Pb and 137Cs techniques can be used to infer a geochronology with incomparable su-periority in accuracy and timescale, which were widely employed for dating recent sediments deposited in fluvial, lacustrine, marine and other sedimentary systems on a timescale of about 100 years. The achievements and current situation of 210Pb and 137Cs dating in the coastal zone of China were summarized, which were in the primary stage when compared with the same kind of achievements overseas. Based on the characters of the sedimentary environment in the coastal zone, the problems and limitations of 210Pb and 137Cs dating for sedimentary rate were revealed, indicating that undisturbed sampling, high- precision sampling and partition, moderate adjustment, accurate descriptions of the regional distribution patterns of 210Pb and 137Cs concentration and comparison of 210Pb method with 137Cs time- mark counting were very important for correcting results. Further analysis of the model establishment for diffusion and mixing of 210Pb and 137Cs techniques was required. Referring to foreign research, the needs of some further improvements and some additional intensive work, especially in the coastal zone of China, were also suggested.
Key words： 210Pb, 137Cs dating; coastal zone; recent sediment rate
SUN Li, JIE Dongmei, PU Lijie . An Overview on the Application of 210Pb and 137Cs Dating in the Resear ch of Recent Sediment Accumulation Rate of Coastal Zone[J]. PROGRESS IN GEOGRAPHY, 2007 , 26(2) : 67 -76 . DOI: 10.11820/dlkxjz.2007.02.008
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