Altérabilité expérimentale d'une granodiorite et de son arène en conditions périglaciaire, tempérée et chaude (Experimental alterability of a granodiorite and of its arena under periglacial, temperate and hot conditions)

摘要

Abstract. - A granodiorite and its arena have been experimentally altered by reproducing the thermohydric conditions of periglacial, temperate and hot climates. If the little frost-splitting granodiorite doesn't give more chemical elements under cold or hot climates, we must notice, on the opposite, that the amount of elements extracted from the frost-shattering granodiorite arena is 10 times more important. We explain these results by the increase of the chemical exchange due to the augmentation of the interface : arena/solution, caused by the thermic alternations of periglacial climates.