Articles | Volume 3, issue 1
https://doi.org/10.5194/soil-3-17-2017
https://doi.org/10.5194/soil-3-17-2017
Original research article
 | 
05 Jan 2017
Original research article |  | 05 Jan 2017

Timescales of carbon turnover in soils with mixed crystalline mineralogies

Lesego Khomo, Susan Trumbore, Carleton R. Bern, and Oliver A. Chadwick

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Short summary
We evaluated mineral control of organic carbon dynamics by relating the content and age of carbon stored in soils of varied mineralogical composition found in the landscapes of Kruger National Park, South Africa. Carbon associated with smectite clay minerals, which have stronger surface–organic matter interactions, averaged about a thousand years old, while most soil carbon was only decades to centuries old and was associated with iron and aluminum oxide minerals.