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冀东太平寨—娄子山地区太古宙麻粒岩系变质峰期流体包裹体首次见于夕线石中 ,按形态和产状可分三类 ,均形成于峰期至其稍后阶段。它们成分相似。特征是 :①富碳质 ,XCO2 +CH4 =0 64～ 0 93;②含少量H2 O ,XH2 O=0～ 0 2 2 ,且与峰期矿物组合平衡热力学计算的水活度 ( aH2 O=0 0 4～ 0 31)和含量 (XH2 O=0 0 3～ 0 2 2 )完全吻合 ;③有时含一定量H2 S和SO2 ;④盐水溶液中阴离子总量极低 ( 0 12～ 0 61mol/L)。石英和石榴石中也有特征相同的这期包裹体。峰期包裹体中CO2 均一温度多数为 - 2 8℃～ - 2 2℃ ,密度为 0 96～ 1 0 6g/cm3,包裹体整体密度应稍高 ,相应的压力为 0 60～ 0 70GPa。流体的氧逸度lgfO2 在 - 17～ - 15之间。峰期流体上述各种特征在空间上较均匀 ,相邻的不同岩石类型中 aH2 O值相似 ,结合地质和原岩特征分析 ,认为流体中CO2可能为深部地幔来源 ,其成因与基性岩浆底侵及其结晶作用有关
For the first time, the fluid inclusions in the Archean granulite series in the Taipingzhai-Louzishan area of the eastern Shandong province were found in the sillimanite. There are three types of fluid inclusions in the Taipingzhai - Louzishan area, which can be divided into three types according to the morphology and the shape of their origin. They are similar in composition. The characteristics are: ① carbon-rich, XCO2 + CH4 = 064 ~ 0 93; ② a small amount of H2 O, XH2 O = 0 ~ 0 2 2, and combined with the peak mineral balance thermodynamic calculation of water activity (aH2 O = 0 0 4 ~ 0 31) and the content (XH 2 O = 0 0 3 ~ 0 2 2) completely matched; ③ sometimes containing a certain amount of H2 S and SO2; ④ the total amount of anion in brine solution is extremely low (0 12 ~ 0 61mol / L). Quartz and garnet also have the same characteristics of this period inclusions. The peak CO2 homogenization temperature in the peak inclusions is mostly -28 ℃ ~ -2 2 ℃, and the density is 0 96 ~ 106 g / cm3. The overall density of inclusions should be slightly higher and the corresponding pressure is 0 60 ~ 0 70GPa. Fluid fugacity lgfO2 between - 17 ~ - 15. The characteristics of the above-mentioned fluids in the peak periods are spatially uniform and aH2O values are similar in different adjacent rock types. Based on the analysis of geologic and protolith characteristics, it is concluded that the CO2 in the fluid may be the source of deep mantle, Invasion and its crystallization related