郯庐断裂带南段桴槎山韧性剪切带糜棱岩的变形条件和组分迁移系_刘德良.pdf

　 12 4　　　　　　　　　　　　　　　　　　　 Vol. 12, No. 4　 　 1 9 9 6 11　　　　　　　 ACTA PETROLOGICA SINICA　　　　　　 Nov. , 1996　 The Deformational Condition and Component Migration of Mylonites in Fuchashan Ductile Shear Zones in the - Southern Tanchen Lujiang Fault Belt 　　　 Lui Deliang, Yang iaoyong, Yang Haitao and Yu Qingni (; 　　230026) (Dep t Earth and Space Sciences University of Science and Technology of China Advanced Center. , ; f or Earth Sciences and Astronomy , the Third World Academy of Sciences; Hef ei, 230026) 　　　　　 。 、, 、 ; , -。 　　Abstract　　 The paper focuses on the mylonites in the ductile shear zones in the southern part of - . Tancheng Lujiang fault zone A number of mineral compositions in the rocks were analysed by EPM A and some typical samples by chemical and atomic absorption methods. Based on the comprehensive study on the , - , , characteristics of the plastic deformation sub grains dynamic recrystalization mineral assemblages and the changes of chemical compositions of minerals and bulk rocks from the mylonites and their wall-rocks, the parameters of temperature and flow stress and strain rate of the rocks were calculated The authors have also. discussed the coupling relationships between the flow stress-volume loss-composition changes and the relationships between the deformation and metamorphism during the mylonitization of the ductile shear zones in this region. 1995 11 6, 1996 7 26. (4930449) . : 　　 1938　　 574 　　　　　　　　　　　　　　　　　　　　　 1996 　　　　　　　　　　　　　　 　　Key ords Ductile shear zones Mylonites Flow stress Volume loss Composition migration: ; ; ; ; ;