�Խ𳧹�����󴲺���ʯӢ����������������������ѧ����΢���¡�����������ļ������������Լ� O �� S ͬλ����ɵȷ����о�������������ɿ���������ɷ���ҪΪ H 2 O���� H 2 O �� NaCl ��ϵ���������һ�¶�Ϊ 148. 7�� �� 352�棬�ζ� ��w ( NaCl) /%�� Ϊ 1. 05% �� 5. 99%��δ 18 O ֵΪ��1. 1‰ ��3. 0‰��˵���ɿ�����̳��˱�������������������ҽ�ˮ�ͺ��ڴ�����ˮΪ��; δ 34 S V �� CDT ���Ϊ 0. 6‰ ��4. 3‰��ƽ��ֵ 0. 817‰������Ϊ 3. 1‰�������ɿ������е�����Ҫ�������Դ�����ΪΧ�ҡ��ۺϷ�����Ϊ���𳧹������������ɽ����̫ƽ���鸩�嵼����ʯȦ�Ŀ��ټ�������������Ż������γɵ�dz����ɽ�ͽ��

The authors studied the petrography and microthermometry on fluid inclusions from auriferous quartz in Jinchanggouliang gold deposit��including laser ��aman microspectroscopic and oxygen isotope as well as sulphur isotope analyses��etc�� The results show that the gas phase of ore- forming fluid is mainly composed of H 2 O�� belonging to H 2 O- NaCl system�� The fluid inclusion homogenization temperatures range from 148. 7�� to 352�棬 and the salinities are between 1. 05% ��5. 99%�� The values of δ 18 O vary from ��1. 1‰ to 3. 0‰��which indicates that ore- forming fluid inherits the characteristics of metamorphic fluid��while is still mainly dominated by the mag- matic water and meteoric waters added in later stage�� The δ 34 S V �� CDT ranges 0. 6‰ to 4. 3‰ in composition�� with the mean as 0. 817‰��and range as 3. 1‰��indicating the sulfur in ore- forming fluid mainly came from the mantle source��and secondly from the surrounding rocks�� In sum��the Jinchanggouliang gold deposit is a shallow orogenic gold deposit formed in the extensional environment caused by Pacific Plate's subduction leading to rapid thinning of the lithosphere and delamination in the late Yanshanian period��