Physics
Scientific paper
Apr 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.1299e&link_type=abstract
Geophysical Research Letters, Volume 28, Issue 7, p. 1299-1302
Physics
3
Mineral Physics: Surfaces And Interfaces, Physical Properties Of Rocks: Plasticity, Diffusion, And Creep, Structural Geology: Fractures And Faults, Tectonophysics: Stresses-General
Scientific paper
In analogy to high-temperature sintering of ceramics and metal powder compacts, the formation of opening-mode fractures in siliceous mudstone during natural in-situ combustion of hydrocarbons is attributed to contractile surface forces between mineral grains and an interstitial melt phase. A comparison between bulk density increase during sintering and created fracture space indicates that fracturing resulted from contraction of the rock matrix due to porosity reduction, grain-scale mass transfer, and high-temperature mineral formation. It is suggested that contractile surface forces between mineral grains and between mineral grains and pore fluid contribute to subcritical fracture formation under a wide range of subsurface conditions.
Aydin Atilla
Eichhubl Peter
Lore Jason
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