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Earth Surface Dynamics An interactive open-access journal of the European Geosciences Union
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Volume 4, issue 3
Earth Surf. Dynam., 4, 727–742, 2016
https://doi.org/10.5194/esurf-4-727-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Earth Surf. Dynam., 4, 727–742, 2016
https://doi.org/10.5194/esurf-4-727-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 22 Sep 2016

Research article | 22 Sep 2016

Oxidation of sulfides and rapid weathering in recent landslides

Robert Emberson et al.
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Andermann, C., Longuevergne, L., Bonnet, S., Crave, A., Davy, P., and Gloaguen, R.: Impact of transient groundwater storage on the discharge of Himalayan rivers, Nat. Geosci., 5, 127–132, https://doi.org/10.1038/ngeo1356, 2012.
Berner, R. A. and Kothavala, Z.: GEOCARB III; a revised model of atmospheric CO2 over Phanerozoic time, Am. J. Sci., 301, 182–204, https://doi.org/10.2475/ajs.294.1.56, 2001.
Bickle, M. J., Tipper, E. T., Galy, A., Chapman, H., and Harris, N.: On Discrimination Between Carbonate and Silicate Inputs to Himalayan Rivers, Am. J. Sci., 315, 120–166, https://doi.org/10.2475/02.2015.02, 2015.
Blöthe, J. H. and Korup, O.: Millennial lag times in the Himalayan sediment routing system, Earth Planet. Sc. Lett., 382, 38–46, https://doi.org/10.1016/j.epsl.2013.08.044, 2013.
Brady, P. V.: The effect of silicate weathering on global temperature and atmospheric CO2, J. Geophys. Res., 96, 18101–18106, https://doi.org/10.1029/91JB01898, 1991.
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Short summary
Rapid dissolution of bedrock and regolith mobilised by landslides can be an important control on rates of overall chemical weathering in mountain ranges. In this study we analysed a number of landslides and rivers in Taiwan to better understand why this occurs. We find that sulfuric acid resulting from rapid oxidation of highly reactive sulfides in landslide deposits drives the intense weathering and can set catchment-scale solute budgets. This could be a CO2 source in fast-eroding mountains.
Rapid dissolution of bedrock and regolith mobilised by landslides can be an important control on...
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