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14 p, 2.5 MB

Clay minerals formed during propylitic alteration of a granite and their influence on primary porosity : A multi-scale approach / Cassiaux, M. (University of Poitiers) ; Proust, D. (University of Poitiers) ; Siitari-Kauppi, M. (University of Helsinki) ; Sardini, P. (University of Poitiers) ; Leutsch, Y. (ANDRA)
The porosity of a propylitized granite from Charroux (France), with no fractures or sealed fractures, inreases by more than four times from the unaltered (0. 3%) to the altered rock (1. 4%). This evolution results from several local porosity modifications which occur at different scales in the rock: (1) at the core scale, from 10 to 10 m, where rock porosity changes as a function of rock-forming mineralogical composition; (2) at the mineral scale, from 10 to 10 m, where porosity depends both on the nature of the rock-forming mineral and its clay mineral alteration. [...]
2006 - DOI (Digital Object Identifier)

10.1346/CCMN.2006.0540502
Clays and Clay Minerals, Vol. 54, Núm. 5 (2006) , p. 541-554

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