| Xiwei low angle thrust nappe ductile shear zone and adjacent to the representative of the ductile shear of Tan Lu fault zone which output with a high angle with arc transition connected, itis composed of ultra myloniticin which has similar deformation and metamorphism with erect the metamorphic zone of the Tanlu fault, the special tectonic location made Xiwei low angle thrust nappe ductile shear zone plays an important role in the kinematics mechanism with left line translation of Tanlu fracture. In this paper,, deformation characteristics of the ductile shear zone in rock metamorphism of ductile shear zone would be analyzed by a variety of methods,with the discussion of geometry, kinematics and the forming environment, following conclusions are obtained:(1) Xiwei low angle nappe ductile shear zone is comprised by the connection of the upright and dextral strike slip ductile shear zone and the inverse shear low from south to north angle ductile thrust belt arc transition,it has a feature of napped from southwest to the northeast in kinematic attribute.(2) Xiwei low angle thrust nappe ductile shear zone has the general characteristics of the ductile shear that the deformation and metamorphism degree decreased gradually from the center to both sides of the belt.(3)A various method of test of temperature and pressure results indicate that Xiwei shear got a metamorphic temperature of400~520oC, and a pressure of430~500Mpa, which shows a moderate temperature pressure environment and low greenschist facies metamorphic facies to lower amphibolite facies. |
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