Experimental study on the effect of the critical temperature of water on the preparing and occurring of large earthquakes |
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| Authors: | Dailu Rong Fahui Jin Yuting He Ming Jin Xuyuan Jiang and Zhongqiang Gao |
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| Institution: | (1) Seismological Institute of Lanzhou, State Seismological Bureau, 730000 Lanzhou, China |
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| Abstract: | The features of fracturing and dissolving of Yunnan marble in distilled water near the critical temperature have been studied
experimentally. The results indicate that the mechanical parameters of the samples (fracture strength, Young’s Modulus, shear
fracture energy and fracture toughness) drop with the temperature of the environment water, near the critical temperature
(380°C), these parameters have sudden changes (drop), then keep stable values roughly. The contents of some chemical materials
in the water, PH value and conductivity at every experiment temperature have been analysed and measured. At 380°C, there all
exist sudden changes. According to the results, it is pointed out that the sudden changes are related to strong stress corrosion
of water near its critical temperature to the rock and the exist and its migration of the water solution near the critical
temperature in the crust have important significance to the earthquake source process, the formation cause of the low-focal
depth earthquakes in the crust.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,14, 156–163, 1992.
This work was sponsored by the Chinese Joint Seismological Science Foundation. |
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| Keywords: | critical temperature stress corrosion model experiment seismic-active layer |
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