ɽ������������λ�ڽ����Ķ�������ʯӢ��--ʴ�����ͽ�󴲣��󻯷�Ϊ4 ���׶Σ�������--ʯӢ���׶Σ�ʯӢ--������׶Σ����������׶κ�ʯӢ--̼���ν׶Ρ�����������о�����������������ɿ�׶�ʯӢ�з�����Һ����ͺ�CO2 ��������壬Ҳ�ɼ������ĸ���������塣��Һ����������һ�¶ȷ�ΧΪ133. 5 �� �� 325. 7 �棬��ֵΪ290 �� �� 310 �棬�ζ�Ϊ2. 80% �� 17. 82% NaCl; ��CO2 ����������һ�¶ȷ�ΧΪ236. 5 �� �� 315 �棬����������ֵ��Ϊ230 �� �� 240 ���310 �� �� 320 �棬�ζ�Ϊ0. 41% �� 8. 92%NaCl; ������������һ�¶ȷ�ΧΪ222. 1 �� �� 236. 4 �棬��ֵΪ230 �� �� 240 �棬�ζ�Ϊ7. 71% �� 9. 98%NaCl���ۺϵ����������������Ͱ�������΢���½����Ϊ: ������󴲳ɿ�����Ϊ���¡��е��ζȵ�NaCl --H2O --CO2 ����ϵ�����������ҽ���Һ�������͡�

The Jiuqu gold deposit of Linglong is a quartz vein-altered type gold deposit�� The mineralization process can be classified into four stages: pyrite-quartz phase��quartz-pyrite phase��polymetallic sulfides and quartz-carbonate phases�� The study of fluid inclusion shows that aqueous two-phase��CO2-bearing three-phase and minor gas-rich fluid inclusions developed in quartz of the main mineralization in Jiuqu gold deposit�� Fluid inclusion indicates that the aqueous two-phase homogenization temperature ranges from 133. 5 �� to 325. 7 �� with the peak value between 290 �� and 310 �棬salinity varies from 2. 80% to 17. 82 % NaCl�� The CO2-bearing three-phase homogenization temperature ranges from 236. 5 �� to 315 �� with two peak values as 230 �� �� 240 �� and 310 �� �� 320 �棬salinity varies from 0. 41% to 8. 92%NaCl�� The gas-rich fluid inclusion homogenization temperature ranges from 222. 1 �� to 236. 4 �� with the peak value between 230 �� and 240 �棬salinity varies from 7. 71% to 9. 98%NaCl�� Comprehensive study of ore-forming condition��geological features and microthermometic analysis of fluid inclusions leads to the conclusion that the ore-forming fluid of the Jiuqu gold deposit belongs to the NaCl--H2O --CO2 hydrothermal system with medium temperature and medium-low salinity�� The deposit is middle-temperature magmatic and hydrothermal in origin��