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The forces that cause deformation of rock are referred to as stresses (Force/unit area). So, to understand rock deformation we must first explore these forces or stresses. ... Ductile Deformation -- wherein the strain is irreversible.
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www.tulane.edu/~sanelson/geol111/deform.htm
www.tulane.edu/~sanelson/geol111/deform.htm
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Miscellaneous question: What is the difference between brittle deformation and ductile deformation? Generally something that is brittle will not deform, or deform very little before it breaks, where as ... What conditions favor ductile deformation? Resistance of structure against deformation? Difference between brittle...
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wiki.answers.com/Q/What_is_the_difference_between_britt...
wiki.answers.com/Q/What_is_the_difference_between_brittle_deformation_and_ductile_deformation
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9. Ductile Deformation Processes and Microstructure ... Such permanent bends and contortions represent ductile deformation and it is not recoverable. If we would be able to remove a folded layer from an outcrop or a deformed mineral from a hand specimen they would not jump back to their original forms.
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www-personal.umich.edu/~vdpluijm/book9.htm
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These data indicate that in sandstones, SMT deformation was nearly coaxial (mean kinematic vorticity number is 0.05 at the regional scale and generally <0.4 for individual samples). A simple one-dimensional steady-state model indicates that ductile thinning accounted for only c. 10% of the overall exhumation.
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sp.lyellcollection.org/cgi/content/abstract/154/1/55
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Petrofabric, finite strain and kinematic vorticity data were used to investigate the heterogeneous nature of ductile deformation along a 1.5–2 km thick extruding shear zone in the south Peloponnese, that formed under blueschist-facies conditions.
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sp.lyellcollection.org/cgi/content/abstract/268/1/497
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Ductile deformation is an irreversible change in the shape and/or volume of a rock that has been stressed beyond its elastic limit. Once the elastic limit is reached, a small amount of additional stress results in a large amount of strain.
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tesla.jcu.edu.au/Schools/Earth/EA1001/Metamorphics/4.%2...
tesla.jcu.edu.au/Schools/Earth/EA1001/Metamorphics/4.%20Deformation.html
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12.113 Structural Geology; Part 3: Ductile deformation, folds and fabrics; Fall 2005 ... Note the geometric necessity for a detachment surface and ductile deformation in the very core of the folds; Similar folds; Similar folds (Ramsay’s class II) are characterized by parallel dip isogons, but more to the point,
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ocw.mit.edu/NR/rdonlyres/Earth--Atmospheric--and-Planet...
ocw.mit.edu/NR/rdonlyres/Earth--Atmospheric--and-Planetary-Sciences/12-113Fall-2005/66EF5197-3D67-48DC-A03A-1B9D85309698/0/part6_dctl_fldfb.pdf
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The first part gives a description of brittle and ductile deformation structures. Further, the formation of faults, folds and foliation is discussed. The module gives an example on how the deformation structures of rocks can be used to deduce the deformation history of the crust.
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www.globalchange.umich.edu/Ben/gs351/gs351.htm
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Low-pressure deforma-tion experiments on olivine + melt specimens have yielded the same conclusion10,11. But in similar experiments on salt–brine mixtures during ductile deformation, the fluid emerges from the triple junctions where it resides under static conditions and spreads onto grain boundaries12–16.
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www.nature.com/nature/journal/v372/n6502/abs/372164a0.h...
www.nature.com/nature/journal/v372/n6502/abs/372164a0.html
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