(Article of periodic en Anglais - 2010)

Document title

A mathematical model for steady-state regolith production at constant erosion rate

Authors(s) and Affiliation(s)

LEBEDEVA M.I. (1) ; FLETCHER R.C. (1 2) ; BRANTLEY S.L. (1) ;
(1) Center for Environmental Kinetics Analysis, Earth and Environmental Systems Inst., Pennsylvania State Univ., University Park, ETATS-UNIS
(2) Physics of Geological Processes, Univ., Oslo, NORVEGE


In this paper, the AA. develop a model for the weathering of a model "granite" that contains albite and quartz. The model yields 3 different steady-state regimes of weathering. At the lowest erosion rates, a local-equilibrium regime is established where albite is completely depleted in the weathering zone. With an increase in erosion rate, transition and kinetic regimes are established. The steady-state thickness of regolith decreases with increasing erosion rate in the local equilibrium and transition regimes, but in the kinetic regime, this thickness is independent of erosion rate. Analytical expressions derived from the model are used to show that regolith production rates decrease exponentially with regolith thickness. This model illustrates how geochemical and geomorphological observations are related for a simple compositional system


Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2010, vol. 35, no5 [pp. 508-524]

Bibliographic references : 50 ref.

Collation : 8 fig., 1 tabl.



INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.1954

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2011
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