| Interpretation of the experimental data provided by Gómez-Rivas and Griera(2012) in terms of the MEM-criterion |
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| 基金项目： | supported by the National Natural Science Foundation of China(Grant Nos.90714006 and 40872133) |
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| 摘 要： | The systematical experiments carried out by Gómez-Rivas and Griera(2012) demonstrate that the ductile shear zones initiate at ~55° to ?1 just as predicted by the MEM-criterion. However, the data are explained in terms of dilatancy, which requires many prerequisites and implies that the ±55° angle is only valid for the used material. In contrast, the ~55? predicted by the MEM-criterion is material independent, which makes it widely applicable to explaining the development of ductile shear zones in nature.
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Interpretation of the experimental data provided by Gómez-Rivas and Griera (2012) in terms of the MEM-criterion |
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| Authors: | YaDong Zheng JinJiang Zhang Tao Wang |
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| Institution: | 1. The Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education, School of Earth and Space Sciences, Peking University, Beijing, 100871, China
2. Institute of Geology, Chinese Academy of Geological Sciences, Beijing, 100037, China
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| Abstract: | The systematical experiments carried out by Gómez-Rivas and Griera (2012) demonstrate that the ductile shear zones initiate at ～55° to σ1 just as predicted by the MEM-criterion. However, the data are explained in terms of dilatancy, which requires many prerequisites and implies that the ±55° angle is only valid for the used material. In contrast, the ～55° predicted by the MEM-criterion is material independent, which makes it widely applicable to explaining the development of ductile shear zones in nature. |
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| Keywords: | MEM-criterion initiate conjugate angle deformation localization |
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