| Seminar: | CPS Seminar |
| date: | 2025 December 26 (Fri) 17:00- |
| Room: | CPS Conference Room and Online (Hybrid meeting) |
| Speaker: | YAMAMOTO Yuzuru (Professor, Department of Planetology, Graduate School of Science, Kobe University) |
| Title: | "Detection of short-duration heating using pyrolysis and oxidation of organic matters: toward earthquake-induced disaster mitigations" |
| Abstract: | To examine the dynamics of earthquakes, it is important to have methods that can detect the short-duration heating caused by frictional heating along faults. During the last decade, frictional heating within fault zones was mainly examined by measurements of vitrinite reflectance, which in turn were understood using models of thermal maturation developed for oil exploration. However, short-duration heating phenomena within fault zones occur at much higher temperatures (~1000˚C cf. 120˚C) and generally over a much shorter time (a few to 106 seconds compared to 106 years). Consequently, new types of geothermometer developed for heating over short durations and at high temperatures are required. Here, we present preliminary results from trials, that indicate that both pyrolysis and oxidation measurements made by RockEval can detect short-duration heating. The S2 (hydrocarbons generated by pyrolysis), S4CO2 (residual organic carbon), and total sulfur are especially promising candidates. |
| Keywords: | Fault, Earthquake, Geothermometry |
| Organizer: | HAYASHI Yoshiyuki |