��ľ˹—��ͨ ( ��—��) ���Ѵ���۰—®���Ѵ����ε���֧�������ż�—����ǵ�ڸ���ص�չ���������ڼ�—�����Ѵ��в�����ˮ������������һ���� NNE ������Լ��д��������΢���������Ϊ���ü��д���Ҫ�ɳ�������—��������ɣ����������߻������������о��������Լ��д��е������ҽ�������Ӧ����� ( Fry ��) ����Ϊ�ü��д�Ӧ������Ϊ��չӦ�䣬��ʯ���ͱ���Ϊ L/LS �͹�����; ����������Ʒ����ʯӢ C �� EBSD ������ͬ��ָʾ��—�����Ѵ��жξ��������߻��Ĺ���������ʯӢ�鹹���е�������Ϊ��������ϵΪ {101} ��110 �� �����ǰ���о����ϣ��Ʋ��—�����Ѵ��ж������߻�ʱ��Ϊ��������С����ڣ��γɻ�������̫ƽ�������������� NWW ת��Ϊ NNW ��ŷ�Ǵ�½�ĸ��ٸ����йء�

The Jiamusi-Yitong falut was the western branch of northern extension of Tan-Lu fault��which con- trolled the distributions of many basins within Jia-Yi graben�� The authous found a ductile-brittle shear zone with trend of NNE in Shuiquliu of Shulan area�� Combining the microstructure study��the authors consider that the shear zone was consisted of protomylonite-mylonite and displayed sinistral strike-slip shear characteristics�� With the meas- urement of finite-strain determination (Fry measurement)��the strain type of the study area was considered to be ex- tension strain�� EBSD (electron back scatter diffraction) measurement also indicated the study area had undergone asinistral strike-slip shear zone and quartz fabrics were mainly low-middle temperature prism-glide fabrics with slip system of {0001} ��110 �� �� To sum up��Shuiquliu shear zone had experienced a sinistral strike-slip shearing in middle-late Early Cretaceous��which was related to moving direction changing from NWW to NNW of the western Pacific Izanagi plate obliquely subducting under the Eurasia plate��