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新疆北部二台北花岗岩共生矿物表现出显著的~(18)O/~(16)O不平衡关系,尤其是石英、长石具有倒转△~(18)O_(石英-长石)关系(△~(18)O_(石英-长石)<0).上述关系表明在花岗岩-水之间发生了~(18)O/~(16)O交换反应.根据质量平衡约束关系对岩石与外来流体的初始δ~(18)O值作了估计.定量模拟表明:二台北岩体流体流动速率约为3×10~(-14)mol/s,水-岩反应时限为0.8～3Ma,水/岩比介于0.79～3.08.以流体δ~(18)O值为变量对流体路径及其不均一性作了估计.
The intergrowth minerals of Erdaobeizi granite in northern Xinjiang show a significant imbalance of ~ (18) O / ~ (16) O. In particular, quartz and feldspar have the inverse △ 18 O_ (quartz- (18) O_ (quartz-feldspar) <0) .This relationship shows that ~ (18) O / ~ (16) O exchange occurs between granite and water.According to the mass balance constraint relationship between rock and foreign fluid The initial δ 18 O values are estimated.The quantitative simulation shows that the fluid flow rate of the two units is about 3 × 10 ~ (-14) mol / s and the water-rock reaction time is 0.8 ~ 3Ma. The water / rock Ratio ranged from 0.79 to 3.08. The fluid path and its inhomogeneity were estimated by using the δ value of δ 18 O as a variable.