【摘要】 马攸木金矿床是西藏最近发现的独立岩金矿床。对马攸木金矿床热液成矿期各矿化阶段石英中的流体包裹体温度与压力、盐度与密度、包裹体成分和H、O同位素诸方面的初步研究表明,成矿流体属中低温(198～259℃)、低盐度(3.10～7.08%NaCl)、低密度(0.85～0.93g/cm3)的流体,属(SO42-)Cl--(K+)Na+水化学类型,成矿环境为低压(22.7～26.7MPa)浅成(0.825～0.971km)环境。成矿流体可能主要来源于与大气降水有成因联系的地下热水。马攸木金矿床可能是与热泉相关的浅成中低温热液矿床。更多还原

【Abstract】 The Mayum gold deposit is a rock gold deposit found recently in Tibet. Study of the temperatures, pressures, salinities, densities, compositions and oxygen and hydrogen isotopes of fluid inclusions in quartz in various mineralization stages of the hydrothermal ore-forming processes of the Mayum gold deposit indicates that the ore fluids belong to low- and medium-temperature (198-259℃), low-salinity (3.10-7.08 wt%NaCl equivalent), low-density (0.85-0.93 g/cm3) ones and the (SO42-) Cl--(K+) Na+ hydrochemical type and formed in a low-pressure (22.7-26.7 MPa) and shallow (0.825-0.971 km) environment. The ore fluids may have been derived from subsurface hydrothermal water genetically associated with meteoric water. The Mayum gold deposit may be a meso- and epithermal gold deposit related to hot springs.更多还原