Experimental analysis of ductile-slip rheology in shallow structural level faults |
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| Authors: | Li Benliang SHU LiangShu SUN Yan MFaure JCharvet |
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| Institution: | 1. Department of Earth Sciences, State Key Laboratory of Mineral Deposits Research, Nanjing University, Nanjing 210093, China
2. Department of Earth Sciences, Orleans University, Orleans, France Correspondence should be addressed to Sun Yan email: sunyan003@china.com |
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| Abstract: | The authors select different grain size samples from granitic body in Weishan, central Hunan, to conduct mylonitization experiments
under high temperature (HT) and high pressure (HP), by which the temperature and pressure conditions of mylonitization and
microstructures of deformation have been obtained. Through the transmission electron microscopy (TEM) observations of experimental
mylonite, we calculate its dislocation density (D), differential rheological stress (Pd) and speed rate of strain (Rs): 3.20x109/cm2, 139.32 MPa and 6.39x10-10/s respectively. The results are in the same magnitude-order with those of natural mylonite from fault zones. By comparison
and analysis of chemical compositions and microstructures of different structural environments, the authors establish approximate
rheological parameters related to shallow structural level and also suggest the multiple rheological properties and total
trend from deep structural level to shallow structural level. |
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| Keywords: | HT/HP experiment ductile and rheology mylonite mylonite mylonite |
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