(Article of periodic en Anglais - 2014)

Document title

Quantifying the rate and depth dependence of bioturbation based on optically-stimulated luminescence (OSL) dates and meteoric 10Be

Authors(s) and Affiliation(s)

JOHNSON M.O. (1) ; MUDD S.M. (2) ; PILLANS B. (3) ; SPOONER N.A. (4) ; FIFIELD L.K. (5) ; KIRKBY M.J. (1) ; GLOOR M. (1) ;
(1) School of Geography, Univ., Leeds, ROYAUME-UNI
(2) School of GeoSciences, University of Edinburgh, Edinburgh, ROYAUME-UNI
(3) Research School of Earth Sciences, The Australian National Univ., Canberra, AUSTRALIE
(4) Inst. for Photonics & Advanced Sensing, School of Chemistry and Physics, Univ., Adelaide, AUSTRALIE
(5) Research School of Physics & Engineering, The Australian National Univ., Canberra, AUSTRALIE


The AA. study here the relationship between mixing rate and depth in a bioturbated soil of the Hughenden region in northeast Queensland, Australia, using a novel method combining OSL (optically-stimulated luminescence) ages and meteoric beryllium-10 (10Be) inventories. They find that the best fit mixing rate decreases non-linearly with increasing soil depth in this soil and the characteristic length scale of 0.28 m over which the mixing coefficient decays is comparable to reported rooting depth coefficients. In addition they show that estimates of surface mixing rates from OSL data are highly dependent on erosion rate and that erosion rate must be constrained if accurate mixing rates are to be quantified. They calculate surface diffusion-like mixing coefficients for the studied soil for 2 different estimates of soil erosion


Article of periodic

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

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

Millesime : 2014, vol. 39, no9 [pp. 1188-1196]

Bibliographic references : 2 p.

Collation : 4 fig., 2 tabl.



INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3520

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
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