Clay fractions from a soil chronosequence after glacier retreat reveal the initial evolution of organo–mineral associations

Clay fractions from a soil chronosequence after glacier retreat reveal the initial evolution of organo–mineral associations

Interactions between organic and mineral constituents prolong the residence time of organic matter in soils. However, the structural organization and mechanisms of organic coverage on mineral surfaces as well as their development with time are still unclear. We used clay fractions from a soil chrono...

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Veröffentlicht in:Geochimica et cosmochimica acta 2012-05, Vol.85, p.1-18
Hauptverfasser: Dümig, Alexander, Häusler, Werner, Steffens, Markus, Kögel-Knabner, Ingrid
Format: Artikel
Sprache:eng
Schlagworte:
acid hydrolysis
acid soils
adsorption
age of soil
amino acids
Carbohydrates
carbon
cation exchange capacity
chronosequences
clay
Clay minerals
Evolution
ferrihydrite
glacial till
glaciers
hydrogen peroxide
Iron
iron oxides
Microorganisms
Minerals
nitrogen
nuclear magnetic resonance spectroscopy
organic compounds
organic matter
Oxalates
proteins
Soil (material)
soil formation
sugars
surface area
weathering
X-ray diffraction
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Zusammenfassung:Interactions between organic and mineral constituents prolong the residence time of organic matter in soils. However, the structural organization and mechanisms of organic coverage on mineral surfaces as well as their development with time are still unclear. We used clay fractions from a soil chronosequence (15, 75 and 120years) in the foreland of the retreating Damma glacier (Switzerland) and from mature soils outside the proglacial area (>700 and
ISSN:0016-7037
1872-9533
DOI:10.1016/j.gca.2012.01.046