作者
J Dietel, R Dohrmann, G Guggenberger, S Meyer-Stüve, S Turner, A Schippers, S Kaufhold, R Butz-Braun, LM Condron, R Mikutta
发表日期
2017/1/2
期刊
New Zealand Journal of Geology and Geophysics
卷号
60
期号
1
页码范围
23-35
出版商
Taylor & Francis
简介
Weathering of primary silicates to secondary clay minerals over time affects multiple soil functions such as the accumulation of organic matter and nutrient cations. However, the extent of clay mineral (trans)formation as a function of soil development is poorly understood. In this study, the degree of weathering of sediments along a 120 kyr soil formation gradient was investigated using X‐ray diffraction, Fourier transform infrared spectroscopy and X‐ray fluorescence spectroscopy. Irrespective of site age, mica and chlorite were the dominant clay minerals. During weathering, a remarkable suite of transitional phases such as vermiculite and several interstratifications with vermiculitic, smectitic, chloritic and micaceous layers developed. The degree of weathering was correlated with soil pH and depletion of K, Ca, Na, Fe and Al, regarding both soil depth and site age. Kaolinite occurred especially at the 120 kyr site …
引用总数
2017201820192020202120222023202433122
学术搜索中的文章