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Title: | Experimental and numerical investigation of the temperature response to stress changes of rocks |
Authors: | Yang, Xiaoqiu Lin, Weiren Tadai, Osamu Zeng, Xin Yu, Chuanhai Yeh, En-Chao Li, Haibing Wang, Huan |
Author's alias: | 林, 為人 |
Keywords: | adiabatic pressure derivative rock temperature response stress change hydrostatic compression Longmenshan fault zone Chelungpu fault zone |
Issue Date: | Jul-2017 |
Publisher: | American Geophysical Union (AGU) |
Journal title: | Journal of Geophysical Research: Solid Earth |
Volume: | 122 |
Issue: | 7 |
Start page: | 5101 |
End page: | 5117 |
Abstract: | The temperature response to stress changes of rocks is key to understanding temperature anomalies in geoscience phenomena such as earthquakes. We developed a new hydrostatic compression system in which the rock specimen center can achieve adiabatic conditions during the first ~10 s following rapid loading or unloading and systematically measured several representative sedimentary, igneous, and metamorphic rocks sampled from two seismogenic zones (the Longmenshan Fault Zone in Sichuan and the Chelungpu Fault Zone (TCDP Hole-A) in Taiwan) and several quarries worldwide. We built a finite element model of heat conduction to confirm the measured results of temperature response to stress changes of rocks. The results show that (1) the adiabatic pressure derivative of the temperature (β) for most crustal rocks is ~1.5 mK/MPa to 6.2 mK/MPa, (2) the temperature response to stress of sedimentary rocks (~3.5–6.2 mK/MPa) is larger than that of igneous and metamorphic rocks (~2.5–3.2 mK/MPa), and (3) there is good linear correlation between β (in mK/MPa) and the bulk modulus K (in GPa): β = (−0.068K + 5.69) ± 0.4, R2 = 0.85. This empirical equation will be very useful for estimating the distribution of β in the crust, because K can be calculated when profiles of crustal density (ρ) and elastic wave velocities (Vp, Vs) are obtained from gravity surveys and seismic exploration. |
Rights: | ©2017. The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. |
URI: | http://hdl.handle.net/2433/226955 |
DOI(Published Version): | 10.1002/2016JB013645 |
Appears in Collections: | Journal Articles |
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