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(Article of periodic en Anglais - 2011)

Document title

New challenges for tafoni research. A new approach to understand processes and weathering rates

Authors(s) and Affiliation(s)

BRANDMEIER M. (1 2) ; KUHLEMANN J. (1 3) ; KRUMREI I. (1) ; KAPPLER A. (1) ; KUBIK P.W. (4) ;
(1) Inst. for Geosciences, Univ., Tübingen, ALLEMAGNE
(2) GZG, Inst. for Geochemistry, Univ., Göttingen, ALLEMAGNE
(3) Swiss Federal Nuclear Safety Inspectorate, Villigen, SUISSE
(4) Lab. of Ion Beam Physics, Zurich, SUISSE

Abstract

Field evidence in the type locality Corsica revealed no trend of size variability from the coast to subalpine elevations and the aspect of tafoni seems to be governed primarily by the directions of local fault systems and cleavage, and only subordinately by wind directions or the aspect of insulation. Raster electron microscopy (REM) analysis of fresh tafone chips confirmed mechanical weathering by the crystallization of salts, as conchoidal fracturing of quartz is observed. The salts are only subordinately provided by sea spray, as calcium and sodium sulfates rather than halite dominate even close to the coast. By applying 10Be-exposure dating, weathering rates of large mature tafone structures were found to be about an order of magnitude higher than those on the exposed top of the affected granite blocks

Source

Article of periodic

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

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

Millesime : 2011, vol. 36, no6 [pp. 839-852]

Bibliographic references : 1 p.

Collation : 17 fig., 4 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.2112

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