Estimated dynamic shear stress and frictional heat during the 1999 Taiwan Chi-Chi earthquake: A chemical kinetics approach with isothermal heating experiments
Journal
Tectonophysics
Journal Volume
469
Journal Issue
1-4
Pages
73-84
Date Issued
2009
Author(s)
Abstract
We performed isothermal heating experiments on samples from a breccia zone adjacent to the slip zone of the Taiwan Chelungpu fault that slipped during the 1999 Chi-Chi earthquake to determine the chemical kinetics function and parameters for thermal decomposition of carbonate minerals in the fault zone. We found that a zero-order reaction was the most likely reaction mechanism for thermal decomposition of these samples and determined an activation energy for the reaction of 137 kJ mol- 1 and a pre-exponential term of 1.15 × 104 s- 1. We applied these parameters in chemical kinetics calculations, taking into account the temperature change over time caused by frictional heating and heat conduction, energy conservation, and energy taken up by the endothermic reaction, to estimate the dynamic shear stress and maximum temperature reached in the slip zone, and found them to be 6.62 MPa and 1079 °C, respectively. © 2009 Elsevier B.V. All rights reserved.
Subjects
Carbonate mineral; Chelungpu fault; Chemical kinetics; Chi-Chi earthquake; Isothermal heat experiment; Thermal decomposition
SDGs
Other Subjects
Chelungpu fault; Chemical kinetics; Chi-Chi earthquake; Isothermal heat experiment; Thermal decomposition; Activation energy; Carbonate minerals; Carbonation; Earthquakes; Energy conservation; Energy management; Experiments; Friction; Heating; Minerals; Photoresists; Pyrolysis; Shear stress; Silica; Silicate minerals; Strength of materials; Thermal effects; Thermogravimetric analysis; Reaction kinetics; carbonate; Chi-Chi earthquake 1999; decomposition; estimation method; experiment; fault zone; heating; isotherm; P-T conditions; parameterization; reaction kinetics; shear stress; slip; temperature effect; Asia; Eurasia; Far East; Taiwan
Type
journal article