中文摘要：

本文从流体包裹体出发,讨论了沂南金矿床的成矿物质来源和成矿机制。各成矿阶段的矽卡岩矿物、石英和方解石中流体包裹体岩相学和显微测温研究结果表明,包裹体主要类型有气液水包裹体、含子矿物多相包裹体、CO2-H2O包裹体和晶质熔体包裹体,其中熔体包裹体在较早期的石榴石、绿帘石和石英中发育。Ⅰ、Ⅱ成矿阶段的成矿流体具有高温和高盐度的特征,均一温度分别为430-520℃、340-430℃,盐度分别为56.7 wt%NaCl2、2.2-53.5 wt%NaCl,代表铁矿化时的流体特征;Ⅲ成矿阶段流体具有中低温（190-250℃）、盐度范围变化较大（6.45-53.5 wt%NaCl）的特征,代表了Cu,Au矿化时的流体活动情况;Ⅳ成矿阶段包裹体均一温度100-190℃,盐度为2.07-15.76 wt%NaCl。根据不同类型包裹体共生组合及流体演化特征,认为流体的不混溶性是导致大量金属沉淀的主要原因,岩浆热液在成矿流体中占主导地位。

英文摘要：

Based on fluid inclusion study, this paper made further discussions on the source of ore-forming materials and the ore genesis of the Yinan gold deposit, Shandong Province. Petrographic observations and microthermometric data indicated that the main types of fluid inclusions are aqueous inclusions, CO2-H2O inclusions, crystalline melt inclusions and daughter mineralbearing multiphase inclusions trapped in four mineralization stages. Melt inclusions were recognized in garnet, epidote and quartz. In the first and second mineralization stages, the ore-forming fluid was characterized by high temperature and high salinity , with the homogenization temperatures of 430-510℃ and 330-390℃, respectively and the salinities of 56. 7 wt% NaCI and 2.2-53.5 wt% NaCl, respectively. In the third mineralization stage, the ore-forming fluid was characterized by moderate to low temperatures （190-250℃） and large variations in salinity （6.45-53.5 wt% NaCl ）. In the last mineraliza- tion stage, the homogenization temperatures ranged from 130℃ to 190℃, with salinities ranging from 2.07 to 15. 76 wt% NaCl. The assemblage of different fluid inclusions and the evolution characteristics of fluid inclusions showed that fluid immiscibility was the main cause for mineralization and that the ore-forming fluids were dominated by magmatic hydrothermal water.