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Global Geology 2013, 16(3) 121-129 DOI:
ISSN: 1673-9736 CN: 22-1371/P |
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Estimation of main rheological parameters for Pangxidong-Jinkeng structural fracture zone and Qinzhou-Hangzhou metallogenetic belt in South China |
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HE Junguo1, 2 |
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1�� Department of Earth Sciences��Sun Yat-Sen University��Guangzhou 510275��China; 2�� Guangdong Key Laboratory of Geological Processes and Mineral ��esource Exploration��Guangzhou 510275��China |
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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�棬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�� |
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Keywords:
recrystallized quartz grains
mylonite
fractal analysis
deformation condition
Pangxidong-Jinkeng structural fracture zone
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