Advances in Earth Science ›› 2007, Vol. 22 ›› Issue (2): 126-135. doi: 10.11867/j.issn.1001-8166.2007.02.0126

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Mineral Deformation Thermometer for Mylonitization

XIANG Bi-wei,ZHU Guang,WANG Yong-sheng,XIE Cheng-long,HU Zhao-qi   

  1. College of Resource and Environmental Engineering, Hefei University of Technology, Hefei 230009,China
  • Received:2007-01-01 Revised:2007-01-01 Online:2007-02-10 Published:2007-02-10

XIANG Bi-wei,ZHU Guang,WANG Yong-sheng,XIE Cheng-long,HU Zhao-qi. Mineral Deformation Thermometer for Mylonitization[J]. Advances in Earth Science, 2007, 22(2): 126-135.

There has been no ideal means to constrain deformation temperatures of mylonites developed under low-moderate temperature conditions. However, it is necessary to determine the deformation temperature in studies of ductile shear zones. Based on new research achievements about the deformation of minerals, such as feldspar, quartz and calcite, this paper summaries approaches for estimating deformations temperatures by mineral deformation phenomena. Under different temperature conditions, deformations of feldspar and quartz show different stages, and their deformation and types of dynamic recrystallisation are closely related to temperatures. Slip systems and C-axis patterns of quartz as well as calcite e twin also exhibit differences with increasing temperatures. Microstructures of the minerals in mylonites can be used as thermometers to determine deformation temperatures.

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