The same samples were also dated by mineral Rb-Sr isochron method.

• 结果表明，花岗岩和片麻岩矿物的氧同位素温度大小顺序为：角闪石>磁铁矿>榍石>石英>黑云母>长石，遵循缓慢冷却条件下扩散控制的氧同位素交换封闭顺序，指示这些岩石没有受到后期热液蚀变的扰动。