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根据形态和产状 ,显微测温和拉曼探针分析资料 ,本区孔兹岩系岩石中流体包裹体可分三类 :1)碳质液相负晶形包体。产于变质峰期夕线石等之中 ,H2 O很低 (XH2 O≈ 0～ 17) ,碳质很高 (XCO2 + CH4≈ 70～ 90 ) ,密度为 1.0 0～ 1.0 5 g/cm3,相应压力约为 0 .7GPa。它们是含 H2 O比现在稍高且均匀的峰期流体相被封闭之后 ,在岩石进一步干化和减压过程中 H2 O从包体内不同程度向外泄漏后所成。 2 ) H2 O溶液两相包体 (XH2 O>80～ 85 )。主要集中于伟晶质脉体和花岗岩中 ,是这期岩浆冷凝过程析出的流体相当时就被封闭所成 ,密度为 0 .93～ 0 .96 g/cm3,相应压力约 0 .6 GPa,这与峰期后迅速减压过程结束时的条件相符。 3) CO2 - H2 O两相和多相包体 ,分布最广 ,成簇状和拖尾状包体群 ,碳质和 H2 O相对含量很不均匀 ,整体密度相对最低 ,一般为 0 .6～ 0 .8g/cm3,相应压力为 0 .3～ 0 .4GPa,它们可能是大幅度减压过程中第一类包体大量爆裂析出的碳质流体与第二类 H2 O溶液流体在各处以不同比例混溶所成 ,它们被封闭后在降温至 330℃以下时分裂成两相或三相包体
According to the data of morphology and origin, microscopic temperature measurement and Raman probe, the fluid inclusions in the khondalite rocks in this area can be divided into three categories: 1) carbonaceous liquid negative inclusions. (XH2 O ≈ 0 ~ 17), high carbon content (XCO2 + CH4 ≈ 70 ~ 90), density of 1.0 0 ~ 1.0 5 g / cm3, The corresponding pressure is about 0 .7GPa. They are formed after the peak of H 2 O is slightly higher than that of the present one. After the fluid phase is closed, the H 2 O leaks outwards from the inclusions to some extent during the further drying and decompression of rocks. 2) H2 O solution two-phase inclusions (XH2 O> 80 ~ 85). Mainly concentrated in the pegmatite and granite, the fluid precipitated during the current magma condensation process was closed at a considerable time, the density of 0.93 ~ 0.96 g / cm3, the corresponding pressure of about 0.6 GPa, This is in line with the conditions at the end of the rapid decompression process after the peak period. 3) CO2 - H2O two - phase and multi - phase inclusions, the most widely distributed, clustered and trailing inclusions, the relative content of carbon and H2 O is very uneven, the overall density is relatively low, generally 0.6 ~ 0.8g / cm3, and the corresponding pressure is 0.3 ~ 0.4GPa, which may be a large amount of carbonaceous fluid of the first type of inclusions and the second type of H2O solution fluid during the process of substantial decompression Different proportions of miscibility into, they are closed after cooling to below 330 ℃ split into two-phase or three-phase inclusions