Energy taken up by co-seismic chemical reactions during a large earthquake: An example from the 1999 Taiwan Chi-Chi earthquake

Details Energy taken up by co-seismic chemical reactions during a large earthquake: An example from the 1999 Taiwan Chi-Chi earthquake Energy taken up by co-seismic chemical reactions during a large earthquake: An example from the 1999 Taiwan Chi-Chi earthquake

Mar 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3606301h&link_type=abstract

Geophysical Research Letters, Volume 36, Issue 6, CiteID L06301

Computer Science

Numerical Analysis

5

Structural Geology: Mechanics, Theory, And Modeling, Seismology: Earthquake Dynamics (1242), Seismology: Tomography (6982, 8180), Structural Geology: High Strain Deformation Zones, Structural Geology: Fractures And Faults

Scientific paper

Frictional heat in a fault zone during earthquake slip transiently induces chemical reactions that may use energy released during the earthquake. We estimated the energy used by such reactions (E C ) by a numerical analysis incorporating frictional heat, thermal diffusion, chemical kinetics, and energy conservation, and found that E C has an auto-feedback effect that inhibits temperature rise in fault zone. During the 1999 Taiwan Chi-Chi earthquake, estimated E C was 0.43 MJ/m2, corresponding to 0.79% of the frictional heat generated. This low percentage probably reflects the low initial concentrations of reactive materials. However, in the case of a fault with abundant reactive materials, E C could reach >50% of the frictional heat and the auto-feedback effect could be large. At this case E C is a nonnegligible component on earthquake energy budget and can affect fault mechanics.

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