Physics
Scientific paper
Jan 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3301305x&link_type=abstract
Geophysical Research Letters, Volume 33, Issue 1, CiteID L01305
Physics
Planetary Sciences: Solid Surface Planets: Physical Properties Of Materials, Seismology: General Or Miscellaneous, Structural Geology: Fractures And Faults, Tectonophysics: Dynamics And Mechanics Of Faulting (8004)
Scientific paper
The fracture energy GC is an important parameter involved in earthquake processes. Researchers have been trying to estimate GC from both geophysical field data and laboratory fracture experiments conducted on either intact rocks or frictional contacts (faults) simulated by saw-cut rocks. The GC measured from these two types of experiments can differ by several orders of magnitude, and the reason for this difference is still unknown. I show that if we divide GC into three parts, namely surface energy, frictional fracture energy, and the damage zone energy, we can explain this discrepancy through simple scaling relations. I also attempt to make the connection from the laboratory measured GC to the seismological estimates.
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