ĥʯɽͭ�������λ��С�˰���—�Ź����ɿ����ĥʯɽ—����ͭ������������ڡ��Ըÿ������庬��ʯӢ��ʯӢ�����������������������ѧ����΢���º͵�����������Һ��ɷּ�������̽������о�������������������ͷ�Ϊ���ͺ�CO₂ �����塢����CO₂ ���弰������Һ��������壬��һ�¶ȱ仯Ϊ205. 9 �� �� 297. 6 �棬�����ζȱ仯Ϊ2. 2 �� 9. 2 wt% (NaCl); �ÿ󴲳ɿ�����Ϊһ��CO₂���е��ζȵ�NaCl--H₂O--CO₂ ��ϵ���塣�ɿ�����IJ�����( ����) ������ͭ���������󻯸�������Ҫ���ء��ÿ󴲳ɿ�ѹ��Ϊ75 �� 110 MPa���ɿ����Ϊ2. 5 �� 3. 7 km����ӳ���γ����е���ȣ����������ҽ���Һ�󴲣��ɿ���������٪������̫ƽ����ĸ��������йء�

Moshishan copper--polymetallic deposit is located in Moshishan--Hongxing metallogenetic district belonging to Xiaoxinganling--Zhangguangcailing ore concentrated zone. The fluid inclusions in quartz mineral of orebearing quartz vein from major ore body were examined by means of petrography��microtemperature measurement and Raman microprobe of single fluid inclusion vapor-liquid phase. The study shows that there exist three types of fluid inclusions��including two types of carbon dioxide-bearing inclusions (type �񣬢�)��and a vapor-liquid twophase inclusions (type ��). The homogenization temperature is 205. 9 �� �� 297. 6 �棬salinity is 2. 2 �� 9. 2 wt% (NaCl)��and the ore-forming fluid is a carbon dioxide-bearing NaCl--H₂O--CO₂ system with medium salinity. Immiscibility (boiling) of ore-forming fluid is an important factor of Cu--Mo polymetallic mineralization enrichment. The metallogenic pressure of ore deposit is 75 �� 110 MPa and the mineralization depth is 2. 5 �� 3. 7 km��which reflects the mineralization was formed in medium depth. The deposit belongs to middle temperature hydrothermal deposit�� and the mineralization was related to the subduction of ancient Pacific Ocean Plate in Late Jurassic.