Global Geology 2013, 16(3) 121-129 DOI:     ISSN: 1673-9736 CN: 22-1371/P
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Keywords
recrystallized quartz grains
mylonite
fractal analysis
deformation condition
Pangxidong-Jinkeng structural fracture zone
Authors
HE Junguo1
2
PubMed
Article by He J
Article by 2

Estimation of main rheological parameters for Pangxidong-Jinkeng structural fracture zone and Qinzhou-Hangzhou metallogenetic belt in South China

HE Junguo1, 2

1． Department of Earth Sciences，Sun Yat-Sen University，Guangzhou 510275，China; 2． Guangdong Key Laboratory of Geological Processes and Mineral Ｒesource Exploration，Guangzhou 510275，China

Abstract：

The mylonites occurred in the fracture zones are studied by dynamically recrystallized quartz grains． The natural microstructures in mylonites are simulated and the deformation conditions of mylonitization are estimated by fractal analysis，recrystallized grain size paleopiezometer and flow laws of quartzite． Depending on fractal analysis，the deformation temperature of mylonitization is approximately 600℃，which presents high greenschist facies to low amphibolite facies． The mylonitization occurred at differential stresses of 9． 1 --10. 7 MPa ( lower limits) ． Compared with extrapolation of quartzite flow laws and estimates of fractal analysis，the strain rate of mylonitization is under 10 － 13. 8 /s．

Keywords： recrystallized quartz grains   mylonite   fractal analysis   deformation condition   Pangxidong-Jinkeng structural fracture zone  
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