In-situ cosmogenic 36 Cl denudation rates of carbonates in Guizhou karst area
作者: Sheng XuCongQiang LiuStewart FreemanYunChao LangChristoph SchnabelChengLong TuKlaus WilckenZhiQi Zhao
作者单位: 1State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences
2Scottish Universities Environmental Research Center
刊名: Chinese Science Bulletin, 2013, Vol.58 (20), pp.2473-2479
来源数据库: Springer Nature Journal
DOI: 10.1007/s11434-013-5756-8
关键词: in-situ cosmogenic 36 Cldenudation rateclimatic conditioncarbonateGuizhou
原始语种摘要: Abstract(#br)This study quantifies surface denudation of carbonate rocks by the first application of in-situ cosmogenic 36 Cl in China. Concentrations of natural Cl and in-situ cosmogenic 36 Cl in bare carbonates from Guizhou karst areas were measured with isotope dilution by accelerator mass spectrometer. The Cl concentration varied from 16 to 206 ppm. The 36 Cl concentrations were in range of (0.8–2.4)×10 6 atom g −1 , resulting in total denudation rates of 20–50 mm ka −1 that averaged over a 10 4 –10 5 a timescale. The 36 Cl-denudation rates showed roughly a negative correlation with the local mean temperature. This preliminary observation may suggest the variations of proportions of chemical weathering and physical erosion in denudation process, depending upon local climatic...
全文获取路径: Springer Nature  (合作)
影响因子:1.319 (2012)

  • cosmogenic 宇宙成因的
  • denudation 剥蚀
  • karst 岩溶
  • rates 地方税