���ɹ���ū����ɽ����ͭ���λ�ڵö����ɳɿ�����϶Ρ����������ɽ���ڶ������ڰ��ҡ����ư��ҵȹ��ɵĻ�ɽͨ��������Χ����ĸ�����ҽӴ������⡣�󴲴��������ⷢ�����͵���Һʴ��ִ�: �ػ�������Ӣ�һ���������ʯ—ˮ����ĸ���������ݿ�����ϲ�ͬ������Һ�ɿ��ڷ�Ϊ�硢�С���3 ���׶Σ��������Ϸֱ�ΪʯӢ+�س�ʯ+������±�����ʯӢ+����ĸ+ ��ͭ��± �����+������ʯӢ+̼���ο���+������±��п������������о���������ɽ����ͭ��󴲷���L �͸�Һ������塢V �͸���������塢S �ͺ��ӿ������������Լ�PG �ʹ���������塣��������̽�����������ʯӢ�߾�����׶�ʯӢ��ˮ��Һ�������H2O �⣬������CO2������������ CH4��C4H6 �ȣ����ӿ��������������ӿ�����Ҫ�г�����ͻ�ͭ��; �н׶�ʯӢ��ֻ������V �Ͱ����庬CO2������ֻ��H2O��S �Ͱ��������ӿ����л�ͭ��ͻ����󣬲��ٺ��г�����; ����׶�ʯӢ�ڰ�����ֻ��H2O���ɿ�������H2O--CO2 --NaCl ��ϵ���ݻ�ΪH2O--NaCl ��ϵ���ɿ��硢�С���3 ���׶ξ�һ�¶ȷֱ�����340�� �� 460�棬240�� �� 360���120�� �� 240��; �ζȱ仯��Χ�ֱ�Ϊ 5. 32 �� 53. 26 wt% NaCl. eqv��1. 65 �� 41. 58 wt% NaCl. eqv ��0. 66 �� 14. 05 wt% NaCl. eqv����ʼ������ֱ�Ӵ�dz���ᾧ�������ҽ������г��۵ĸ��¡����ζȺ͸����ݶȵijɿ����塣����������塢��Һ�������ͺ�����Ķ���������ձ鹲��������ķ��ڿ��������ڽ�����������������Ҫ���ơ�����⡢��ͬλ���о�����Ϊ��--��׶���ˮ�Ļ��뵼�µ������ϼ����������ڳɿ������Ҳ��������Ҫ���á�

Wunugetushan large Cu-Mo deposit of Inner Mongolia��is located in the southwestern of Derbugan metallogenic belt�� The orebodies are mainly hosted in the volcanic vent constituted by monzogranite and rhyolite porphyry��and their contact zones are with biotitic granite�� The Cu-Mo deposit exhibits typical mineralization and alteration characters�� Three alteration zones can be circled around the ore-bearing porphyry outwardly��including a center core of potassic and silicic alteration zone��outside ring zone of phyllic and illite-damourite zone�� According to mineral assemblages��the ore-forming processes were divided into early��middle and late stages�� In quartz phenocryst and quartz veins��four types of fluid inclusions are distinguished��namely L-type and V-type aqueous fluid inclusions�� daughter mineral bearing multiphase inclusions��and pure gaseous phase inclusions�� According to the analysis of Laser ��aman probe��most aqueous fluid inclusions in quartz phenocryst and early-stage quartz veins contain H2O and CO2 ��some of them also contain CH4 and C4H6 ; the daughter minerals in multiphase inclusions include hematite and chalcopyrite�� In the middle-stage quartz veins��most fluid inclusions only consist of H2O��and only some V-type inclusions contain CO2 �� The daughter minerals in multiphase inclusions only include chalcopyrite and pyrite�� There are only H2O in aqueous fluid inclusions in late-stage quartz veins�� The ore-forming fluid evolved from H2O--CO2--NaCl system to H2O--NaCl fluid system gradually�� Homogeneous temperatures in the early��middle and late stage quartz veins are 340�� �� 460�棬240�� �� 360��and 120�� �� 240�� respectively��and the salinities are 5. 32 �� 53. 26wt% NaCl. eqv��1. 65 �� 41. 58wt% NaCl. eqv and 0. 66 �� 14. 05 wt% NaCl. eqv respectively�� The initial fluids��exhibiting high-temperature��hypersaline and high-oxygen fugacity��were directly resulted from the fluid exsolution of the shallow crystallizing magma melt at the final stage�� Coexistence of daughter mineral bearing multiphase inclusions and L-type��V-type aqueous fluid inclusions in quartz phenocryst and early stage quartz veins suggest that fluid boiling may be the most important mechanism of the precipitation of massive metal sulphides in the early stage�� Based on the study of hydrogen and oxygen isotopes��we propose that the fluid mixing of meteoric water with early-stage magmatic water plays an important role in the middle-late stage mineralization��