摘要
Characteristcs of progressive ductile deformation and remnant igneous fabrics indicate that thefoliatal diorites in the middle sector of the Jiangshao fracture belt in Zhuji County, Zhejiang, aremyonites deformed from diorites. The mylonithation occurred about 353 - 370 Ma ago under a condi-tion of 425-475℃ and 3.8-4.6 kb.Therelation between the deformation and metherphism was discussed based on petrographic evidence and mineral chemistry and assemblage. It is suggested that thedeformation was responsible for the deveopment of lowgrad greenschisthaes metamorphism ofmylonitic diorites by introducing fluid phase to aerelerate metamorphic reaction and diffosion.
Characteristcs of progressive ductile deformation and remnant igneous fabrics indicate that thefoliatal diorites in the middle sector of the Jiangshao fracture belt in Zhuji County, Zhejiang, aremyonites deformed from diorites. The mylonithation occurred about 353 - 370 Ma ago under a condi-tion of 425-475℃ and 3.8-4.6 kb.Therelation between the deformation and metherphism was discussed based on petrographic evidence and mineral chemistry and assemblage. It is suggested that thedeformation was responsible for the deveopment of lowgrad greenschisthaes metamorphism ofmylonitic diorites by introducing fluid phase to aerelerate metamorphic reaction and diffosion.
关键词
糜棱岩
闪长岩
浙江
变质作用
mylonitization
diorite
Jiangshao fracture belt
Zhejiang
