�Ժ������Ķϲ㡢�������Ұ��;����о���Ӧ�ó�ƽͶӰ�����Խ����״����ͳ���������ȷ���о���������6 ����Ϊ���Ե����Ʋ�״������3 ������ϵ������һ��ȷ����3 �ڱ������õĹ���Ӧ������������������ܵ�NW--SE ����չ����Ӱ�죬ʹ�ȴ�Ľ�EW �򺣹��ϲ㷢�����������ƣ��ں����ϲ������γ�NE �����ϲ���ϣ�ͬʱ���к���ʯӢ���Ĺ���; �����ܵ�NEE--SWW ��ѹ���ã�NE �����ϲ���Ϻͷ����ڶϲ�֮�еĺ���ʯӢ���ܵ�ѹŤ�Ա������õĸ���; �����ܵ� NW--SE ��ѹ���ã������ϲ����Ϊ�����߻���������NE ��ϲ�����ٴ��ܵ���ѹ���ø��죬ͬʱ�γ�NWW ���NNW ���߻��ϲ㣬ʹ�����γɵĶϲ�ͺ���ʯӢ���ܵ����θ���������ռ��ϵĴ�λ��3 �ڱ������úܿ������԰��Ѽ����������ģ���̫ƽ������ŷ�Ǵ�½�ĸ��������йء�

Based on detailed study of the faults and joints in Haigou gold deposit��the joint occurrences are summarized and analyzed using stereographic projection method�� Six preferred occurrences and three joint sets are recognized and their stress field during three stages of deformation is determined�� The Haigou gold deposit underwent NW-SE extension at the early stage��which led to the left lateral strike slip of existing EW trending Haigou faults and formed NE trending normal fault at the hanging wall of Haigou fault��associated with the injection of goldbearing quartz veins�� During the middle stage��the deposit underwent NEE-SWW compression��led to the compressive reworking of NE trending normal faults and the gold-bearing quartz veins confined in the ore-controlling faults�� At the late stage��the compression in NW-SE direction led to the right lateral strike slipping of Haigou fault��the NE trending faults reformed by compression again��and formed NWW and NNW trending strike slipping faults��which led to the deformation and displacement of the earlier faults and gold-bearing quartz veins�� The three stages of deformation probably took place during Cretaceous��which related to the subduction process from the Pacific Plate to Eurasian Plate��