Surface temperature differences between minerals in crystalline rocks : implications for granular disaggregation of granites through thermal fatigue

Auteurs :
GÓMEZ-HERAS, M.
SMITH, B.J.
FORT, R.

Description :
This work confirms the exixtence of surface temperature differences between minerals in granitic rocks under simulated short-term temperature fluctuations so as to discriminate their potential for initiating granular disaggregation. The influence of colour, as a surrogate for albedo, and crystal size, as a function of thermal mass are specifically identified because of their ease of quantification. Four rock types with a range of these properties were examined, and subjected to repeated short-term temperature cycles by radiative heating and cooling under laboratory conditions.


Type de document :
Article de périodique

Source :
Geomorphology (Amsterdam), issn : 0169-555X, 2006, vol. 78, n°. 3-4, p. 236-249, nombre de pages : 14, Collation : Illustration, Références bibliographiques : 47 ref.

Date :
2006

Editeur :
Pays édition : Pays-Bas, Amsterdam, Elsevier