10Be, 14C Distribution, and Soil Production Rate in a Soil Profile of a Grassland Slope at Heshan Hilly Land, Guangdong
Issue Date
2004-01-01Keywords
absolute agealkaline 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
Metadata
Show full item recordCitation
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.Journal
RadiocarbonDescription
From the 18th International Radiocarbon Conference held in Wellington, New Zealand, September 1-5, 2003.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
Proceedingstext
Language
enISSN
0033-8222ae974a485f413a2113503eed53cd6c53
10.1017/S0033822200039758