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Quantitative estimation of cryogenic weathering energy
Author(s) -
Vasiliyev A. A.
Publication year - 1994
Publication title -
permafrost and periglacial processes
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.867
H-Index - 76
eISSN - 1099-1530
pISSN - 1045-6740
DOI - 10.1002/ppp.3430050107
Subject(s) - oil shale , weathering , geology , permafrost , energy flux , mineralogy , heat flux , flux (metallurgy) , absorption (acoustics) , thermal , thermal energy , geotechnical engineering , geomorphology , heat transfer , thermodynamics , composite material , materials science , paleontology , oceanography , physics , astronomy , metallurgy
Experiments to measure the energy released by the cryogenic weathering of sandstone and shale are described. The energy released by fracturing is thought to be proportional to the importance of new surfaces appearing in the rock at the time of disintegration. The specific surfaces of samples which have been submitted to freezing have been determined by an absorption technique. The energy released by disintegration of sandstone is about −400 Kj/m 2 of specific surface, and for shale is 700 Kj/m 2 . These values represent less than 1–2% of the heat flux of the frozen rock and have a negligible effect therefore, on the thermal region of the active layer.