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    10Be, 14C Distribution, and Soil Production Rate in a Soil Profile of a Grassland Slope at Heshan Hilly Land, Guangdong

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    Author
    Shen, C. D.
    Beer, J.
    Ivy-Ochs, S.
    Sun, Y.
    Yi, W.
    Kubik, P. W.
    Suter, M.
    Li, Z.
    Peng, S.
    Yang, Y.
    Issue Date
    2004-01-01
    Keywords
    absolute age
    alkaline earth metals
    Asia
    Be 10
    beryllium
    C 13
    C 13 C 12
    C 14
    C 14 C 12
    carbon
    Cenozoic
    China
    concentration
    dates
    erosion
    Far East
    grasslands
    Guangdong China
    Heshan Hilly Land Interdisciplinary Experimental Station
    Holocene
    isotope ratios
    isotopes
    metals
    organic carbon
    Quaternary
    radioactive isotopes
    slopes
    soil sampling
    soils
    stable isotopes
    weathering
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    Citation
    Shen, C. D., Beer, J., Ivy-Ochs, S., Sun, Y., Yi, W., Kubik, P. W., ... & Yang, Y. (2004). 10Be, 14C distribution, and soil production rate in a soil profile of a grassland slope at Heshan Hilly Land, Guangdong. Radiocarbon, 46(1), 445-454.
    Publisher
    Department of Geosciences, The University of Arizona
    Journal
    Radiocarbon
    Description
    From the 18th International Radiocarbon Conference held in Wellington, New Zealand, September 1-5, 2003.
    URI
    http://hdl.handle.net/10150/654690
    DOI
    10.1017/S0033822200039758
    Additional Links
    http://radiocarbon.webhost.uits.arizona.edu/
    Abstract
    Concentrations of organic carbon, carbon isotopes (13C and 14C), atmospheric 10Be in soil, and in situ 10Be in bedrock and weathering rock were determined in a study of a profile of a grassland slope at the Heshan Hilly Land Interdisciplinary Experimental Station, Chinese Academy of Sciences, in Guangdong Province, China. A good linear relationship between depth and the 14C apparent age of the organic carbon demonstrates that the rock weathering process and the accumulation process of organic matter in the slope are relatively stable. Both 14C and 10Be results show that about 34% of soil in the grassland slope has been eroded during the past 3800 yr. The 10Be results for interstitial soil from weathered rocks show that the 90-cm-thick weathering rock layer above the bedrock has evolved over a period of 1.36 Myr. The concentrations of in situ 10Be in the weathered rock and bedrock are 10.7 X 10^4 atoms/g and 8.31 X 10^-4 atoms/g, respectively. The weathering rate of the bedrock, equivalent to the soil production rate, was estimated at 8.8 X 10^-4 cm/yr, and the exposure ages of the weathered rock and the bedrock were 72 kyr and 230 kyr, respectively.
    Type
    Proceedings
    text
    Language
    en
    ISSN
    0033-8222
    ae974a485f413a2113503eed53cd6c53
    10.1017/S0033822200039758
    Scopus Count
    Collections
    Radiocarbon, Volume 46, Number 1 (2004)

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