1. College of Earth Sciences��Jilin University��Changchun 130061��China; 2. ��esearch Center of Palaeontology �� Straigraphy��Jilin University��Changchun 130026��China; 3. Institute of Geological Survey of Inner Mongolia Autonomous ��egion��Huhhot 010020��China; 4. Shenyang Institute of Geology and Mineral ��esources��Shenyang 110034��China; 5. Museum of Geology��Jilin University��Changchun 130026��China

Duhuangling gold deposit formed in the quartz diorite��is a hypabyssal medium temperature magmatic hydrothermal deposit��which is controlled by both compressive and compress-shear fault and crypto-explosive breccia cone�� The study of fluid inclusion shows that: �� the type of the fluid inclusion is mainly gas-liquid biphase inclusions��associated with some pure liquid inclusions and pure volatile inclusions��and a few NaCl minerals-bearing polyphase inclusions��with the ore-forming fluid belonging to H2O-NaCl system�� ��The homogenization temperature of the fluid inclusion at the major merallogenic stage ranges from 200�� to 375�棬concentrating on 230 �� 320�森 The fluid is characterized by low density ( 0. 68 �� 0. 94 g /cm3 ) and low salinity ( 3. 39 �� 13. 07 % NaCl eqv) �� The ore-forming pressure is 7. 5 �� 14. 3 MPa��and the estimated metallogenic depth is 1. 2 �� 1. 6 km�� �� Combined with the recent progress in study as isotopic��trace element and metallogenic chronology��the authors suggest that the Duhuangling gold deposit was related to late Yanshannian magmatic activity��and the ore-forming fluids were mainly derived from magmatic hydrothermal fluids�� Concealed explosion and boiling occurred during their ascending process along with the participation of meteoric water��resulting in a rapid deposition and enrichment of metallogenic material��