华南滨海花岗岩丘陵的化学风化与化学径流

被引:10
作者
高全洲
陶贞
机构
[1] 中山大学地理科学与规划学院
基金
广东省自然科学基金;
关键词
化学风化; 花岗岩; 离子; 海盐; 酸沉降; CO2;
D O I
暂无
中图分类号
P512.12 []; P588.121 [];
学科分类号
摘要
对珠海市花岗岩小流域的地表径流及其常量离子和溶解Si含量进行了每周1次、连续1年的观测和分析.结果表明:在大气降水过程中,坡面漫流贡献了沟谷径流的主要部分;在非降水时段,地下水则成为沟谷径流的主要补给源.溶解Si,Na+,HCO3-和Cl-构成沟谷径流的主要化学成分.滨海小流域地表化学径流的阴离子主要源自以CO2及黄铁矿氧化成因的H2SO4为介质的花岗岩的自然化学风化过程、海盐的干湿沉降过程以及酸的干湿沉降过程(约以1:1:1的贡献).滨海小流域径流中NO3-与SO42-比值大于1,而在同一生物气候带内西江径流的相应值小于1,揭示流域岩性差异和人类活动导致的大气酸沉降组成差异是决定径流化学组成的主要因素.华南滨海花岗岩小流域化学风化过程对CO2的消耗通量为(0.35~1.37)×105mol·km-2·a-1.
引用
收藏
页码:758 / 767
页数:10
相关论文
共 13 条
  • [1] Effect of atmospheric precipitation on the dissolved loads of the Dongjiang River,China[J]. LI Jing ying 1,2,* , ZHANG Jing 2,3 (1.School of Materials and Environmental Sciences, Qingdao University of Science & Technology, Qingdao 266042, China. 2.Chemistry and Chemical Engineering College, Ocean University of China, Qingdao 266003, China;3.State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China).Journal of Environmental Sciences. 2004(03)
  • [2] 中国南方的红土与红色风化壳
    朱显谟
    [J]. 第四纪研究, 1993, (01) : 75 - 84
  • [3] What is the maximum potential for CO2 sequestration by "stimulated" weathering on the global scale?
    Hartmann, Jens
    Kempe, Stephan
    [J]. NATURWISSENSCHAFTEN, 2008, 95 (12) : 1159 - 1164
  • [4] Geochemistry of the dissolved load of the Changjiang Basin rivers: Anthropogenic impacts and chemical weathering[J] . B. Chetelat,C.-Q. Liu,Z.Q. Zhao,Q.L. Wang,S.L. Li,J. Li,B.L. Wang.Geochimica et Cosmochimica Acta . 2008 (17)
  • [5] Sulfuric acid as an agent of carbonate weathering constrained by δ 13 C DIC : Examples from Southwest China[J] . Earth and Planetary Science Letters . 2008 (3)
  • [6] Chemical weathering in the upper reaches of Xijiang River draining the Yunnan–Guizhou Plateau, Southwest China[J] . Zhifang Xu,Cong-Qiang Liu.Chemical Geology . 2007 (1)
  • [7] Chemical weathering in the river basins of the Himalaya, India[J] . Current Science . 2005 (5)
  • [8] The role of sulfur in chemical weathering and atmospheric CO 2 fluxes: Evidence from major ions, δ 13 C DIC , and δ 34 S SO4 in rivers of the Canadian Cordillera[J] . Jody Spence,Kevin Telmer.Geochimica et Cosmochimica Acta . 2005 (23)
  • [9] Chemical weathering in the Krishna Basin and Western Ghats of the Deccan Traps, India: Rates of basalt weathering and their controls[J] . A. Das,S. Krishnaswami,M.M. Sarin,K. Pande.Geochimica et Cosmochimica Acta . 2005 (8)
  • [10] Major and trace element geochemistry in the upper Niger river (Mali): physical and chemical weathering rates and CO 2 consumption[J] . Cécile Picouet,Bernard Dupré,Didier Orange,Michel Valladon.Chemical Geology . 2002 (1)