2:00 PM - 2:15 PM
[SSS17-08] Mechanochemical effects on maturation of carbonaceous materials in faults during earthquakes
Keywords:Fault, Carbonaceous materials, Spectroscopic analysis
We performed the friction experiments at 3.0 MPa normal stress and 1 mm/s slip rate, and 10 m slip distance by using the mixture of 90 wt.% quartz and 10 wt.% coal. To reproduce heating during earthquake slip, we heated the samples after experiments at 100-1000 °C. By comparing the spectra on these samples, we confirmed that some reactions, such as breakage of aliphatic chain, occurred at relatively low temperature on sheared samples. Thus, the mechanochemical effect should be considered for deterring the temperature recorded on the basis of the maturation.