210Pb、137Cs 计年法在现代海岸带沉积速率 研究中的应用述评

doi:10.11820/dlkxjz.2007.02.008

Abstract

Abstract:

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.

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An Overview on the Application of ²¹⁰Pb and ¹³⁷Cs Dating in the Resear ch of Recent Sediment Accumulation Rate of Coastal Zone

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An Overview on the Application of 210Pb and 137Cs Dating in the Resear ch of Recent Sediment Accumulation Rate of Coastal Zone

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An Overview on the Application of ²¹⁰Pb and ¹³⁷Cs Dating in the Resear ch of Recent Sediment Accumulation Rate of Coastal Zone