中文摘要：

流体包裹体的捕获压力研究是成矿压力和成矿深度估算的常用方法,其结果受多种因素的影响.在综合考虑脉状金矿的地质特征、所研究包裹体体系的基础上,研究了脉状金矿床富金石英脉的成矿压力.该类金矿床富金阶段的最低形成压力范围较宽,从小秦岭烟灰色含金石英脉阶段的270～290MPa、乌拉山含明金石英脉的250MPa,到东坪富金石英脉的70～160MPa.流体富CO2是脉状金矿一个重要特征,尤其是造山型金矿及与侵入岩有关的金矿,估算其流体捕获压力时应该利用CO2-H2O体系或CO2-H2O-NaCl体系的压力计方法.压力与CO2部分均一温度（Tm,CO2）有明显的负相关关系,反映了CO2密度与压力的密切关系.CO2丰度高且密度较高的金矿床具有较高的成矿压力.为使获得的数据具有可比性,脉状金矿的成矿压力及深度估算应考虑包裹体类型、寄主矿物所处的构造环境、断裂性质、断裂/矿脉的产状、岩石类型及密度等主要因素.

英文摘要：

Trapping pressures of fluid inclusions are commonly used in the estimation of ore-forming pressures and depths, but the results could be affected by various factors. This paper studies the ore-forming pressures of goldrich quartz veins based on comprehensive geologic characteristics of vein gold deposits and fluid inclusion systems. The minimum ore-forming pressures of vein gold deposits have a comparatively wide range, which are from 2704 290 MPa of smoky quartz vein stage for the Lesser Qinling gold deposits, 250 MPa of visible gold-bearing quartz veins for the Wulashan gold deposit, to 70 - 160 MPa of gold-rich quartz veins for the Dongping gold deposit. Abundant CO2 in fluids is an important feature for vein gold deposits, especially for orogenic gold deposits and intrusion-related gold deposits. CO2 H2 O or CO2 -- H2 O-NaCl system should be used in estimation of trapping pressures of fluid inclusions. There is a significantly negative correlation between pressures and Tm.co2, reflecting a close relationship between densities and pressures. A gold deposit with high-density and high CO2 content has a high ore-forming pressure. In order to obtain comparatively credible data, some important factors should be considered in the estimation of ore-forming pressure sand depth for vein gold deposits, including fluid inclusion types, ore-forming tectonic environment, fracture properties and their occurrence, as well as features and densities of wallrocks.