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碳质流体(CO2-CH4-N2体系流体)常见于地幔橄榄岩和下地壳麻粒岩中。近期研究表明,阿尔泰南缘晚古生代成矿环境中的碳质流体极为丰富,不仅在造山型金矿中赋存大量与成矿有关的碳质流体,而且在VMS型矿床中也存在同造山期的变质碳质流体。由共生的富CO2包裹体(LCO2-LH2O型)和H2O-CO2包裹体(LH2O-LCO2型)的均一温度推测,造山型金矿的碳质流体捕获温度大于254～394.5℃,压力大于150～320MPa;VMS矿床的变质碳质流体捕获温度大于209～430℃,压力大于180～300MPa,两者具相似的捕获温度压力条件。碳质流体的捕获温度压力条件与变质相带相平衡计算的变质温度、压力范围相当。碳质流体源于区域变质作用,并参与了与造山型金矿有关的构造-变质-流体-成矿作用和对VMS型矿床的变质改造作用。
Carbonaceous fluids (fluids of the CO2-CH4-N2 system) are common in mantle peridotites and lower crustal granulites. Recent studies have shown that the late Paleozoic ore-forming environment in the southern margin of Altay is extremely rich in carbonaceous fluids. Not only is there a large amount of carbonaceous fluids associated with metallogenesis in orogenic gold deposits, but also in the VMS deposits Metamorphic carbonaceous fluid. The homogenization temperature of the symbiotic CO2-rich inclusions (LCO2-LH2O) and H2O-CO2 inclusions (LH2O-LCO2) suggests that the capture temperature of carbonaceous fluids in orogenic gold deposits is more than 254 ~ 394.5 ℃ and the pressure is more than 150 ~ 320MPa. The metamorphic carbonaceous fluid in the VMS deposit has a temperature of more than 209-430 ℃ and a pressure of more than 180-300MPa, both of which have similar conditions for capturing temperature and pressure. Carboniferous fluid capture temperature and pressure conditions metamorphic facies phase equilibrium calculated metamorphic temperature, pressure range quite. Carbonaceous fluids originate from regional metamorphism and are involved in tectono-metamorphic-fluid-metallogenic processes associated with orogenic gold deposits and metamorphism and remodeling of VMS deposits.