Abstract
Characteristics of progressive ductile deformation and remnant igneous fabrics indicate that the foliated diorites in the middle sector of the Jiangshao fracture belt in Zhuji County, Zhejiang, are mylonites deformed from diorites. The mylonitization occurred about 353–370 Ma ago under a condition of 425–475°C and 3.8–4.6 kb. The relation between the deformation and metamorphism was discussed based on petrographic evidence and mineral chemistry and assemblage. It is suggested that the deformation was responsible for the development of low-grade greenschist-facies metamorphism of mylonitic diorites by introducing fluid phase to accelerate metamorphic reaction and diflusion.
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Yunhe, Z., Xinmin, Z. Mylonitization of diorites in Jiangshao fracture belt, Zhejiang Province, China. Chin. J. of Geochem. 13, 371–382 (1994). https://doi.org/10.1007/BF02838526
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DOI: https://doi.org/10.1007/BF02838526