Modern Silicate Weathering Regimes Across China Revealed by Geochemical Records From Surface Soils
Modern Silicate Weathering Regimes Across China Revealed by Geochemical Records From Surface Soils
复制标题
DOI：
10.1029/2022jf006728
复制
发表时间：
2022-09
期刊：
影响因子：
--
通讯作者：
Licheng Guo;Jiabin Wu;Yulu Chen;S. Xiong;Jingyi Cui;Z. Ding
中科院分区：
文献类型：
--
作者：
Licheng Guo;Jiabin Wu;Yulu Chen;S. Xiong;Jingyi Cui;Z. Ding
现代动力学受限(即硅酸盐风化取决于温度和降水)和供应受限(即风化主要受新鲜材料供应的限制)的风化制度的知识对于在地质时间尺度上分析风化-二氧化碳-气候系统是重要的。然而，在全球范围内，由于缺乏关于原位风化过程的空间信息，现代硅酸盐风化机制及其可能的转变方面存在很大的知识缺口。在这里，我们提供了第一个主要元素浓度的详细汇编散装和细分数(80，和动力学限制的制度在中央情报局和lt；80的地区盛行。由此推断，构造抬升和全球变暖可能导致中国南部活动山带和泛滥平原以及以中间化学风化为主的地区在供应受限风化和动力有限风化之间的转换。但是，中国北部的一些干旱到极端干旱地区和极端化学风化的高原地区不会发生变化。
Knowledge of modern kinetically limited (i.e., silicate weathering depends on temperature and precipitation) and supply‐limited (i.e., weathering is limited mainly by the supply of fresh material) weathering regimes is important for analyzing the weathering–CO2–climate system on geological timescales. However, on the global scale, there are large knowledge gaps in modern silicate weathering regimes and their possible shifts, due to the lack of spatial information on in situ weathering processes. Here, we present the first detailed compilation of the major element concentrations in bulk and fine fraction ( 80, and the kinetically limited regime prevails in areas with CIA < 80. A significant inference from the results is that tectonic uplift and global warming could cause shifts between supply‐limited and kinetically limited weathering regimes in the active mountain belts and floodplains of southern China and in areas dominated by intermediate chemical weathering. However, no shifts would occur in some of the arid to extremely arid areas of northern China and in highland areas with extreme chemical weathering.