An experimental study on variation of b value during deformation of rock samples with different structural models |
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| Authors: | Chen Shun-yun Liu Li-qiang Ma Sheng-li and Ma Jin |
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| Institution: | (1) State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, 100029 Beijing, China |
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| Abstract: | A preliminary study of b value of rocks with two kinds of structural models has been made on the base of a new acoustic emission recording system.
It shows that b value of the sample decreases obviously when the sample with compressive en echelon faults changes into a tensile one after interchange occurs between stress axis σ
1 and σ
2. A similar experiment is observed when the sample with tensile en echelon faults changes into that with a bend fault after two segments of the en echelon fault linking up. These facts indicate that the variation of b value may contain the information of the regional dominant structural model. Therefore, b-value analyses could be a new method for studying regional dominant structural models.
Foundation item: National Natural Science Foundation of China (Grant No. 40072067) and Minister of Science and Technology of China (2004BA601B01). |
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| Keywords: | b value of acoustic emission structural model en echelon fault bend fault |
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