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以玲珑片麻状花岗岩为初始物,采用纯水和H2O-CO2混合物(x(H2O)=0.70)两种实验介质,在1.5×102MPa和不同温度下(740℃,770℃,810℃,850℃)进行部分熔融实验,验证了胶东金矿区与金矿密切相关的栾家河中粗粒花岗岩与玲珑片麻状花岗岩之间的熔融再生关系.结果表明,栾家河岩体是由玲珑岩体在810℃,1.5×102MPa,水不饱和(x(H2O)=0.70)条件下经18%的熔融形成的.实验结果与岩体中大量发育CO2包裹体的地质事实相符合,从熔体分离机制上阐明了两岩体之间的生成关系.
Using extrusive gneissic granite as starting material, two experimental media of pure water and H2O-CO2 mixture (x (H2O) = 0.70) were used at 1.5 × 102MPa and different temperature (740 ℃, 770 ℃, 810 ° C and 850 ° C). The melting relationship between the coarse-grained granites and the extrusive gneissic granites in Luanjiahe River, which is closely related to the gold deposit, is verified in the Jiaodong gold deposit. The results show that the Luanjiahe pluton is formed by 18% melting of the extinct pluton at 810 ℃, 1.5 × 102MPa, water-unsaturated (x (H2O) = 0.70). The experimental results are consistent with the geological facts that a large number of CO2 inclusions are developed in the rock mass, and the formation relationship between the two rock mass is clarified from the melt separation mechanism.