南极中山站区电气石及其与变质作用的关系

南极中山站区的巨晶“电气石”实际上是柱晶石。电气石的确存在，但颗粒细小，含量较低。根据其颜色、成分和产出特征，至少可分为三种类型，不同的电气石与变质作用发展的不同阶段有关。电气石在麻粒岩相变质作用条件下能够稳定存在，与其它硼硅酸盐矿物（即硅硼镁铝矿和柱晶石）的缓冲作用有关。

Tourmaline and Its Relationship with Metamorphism,Zhongshan Station,Antarctica

Megacrystalline "tourmaline" at the Zhongshan Station, Antarctica, is in fact kornerupine. The tourmaline is fine-grained and minor in amount and can be classified at least into three types according to its optical properties, composition and textural relations, with the types corresponding with the stages of metamorphism. The mineral is stable in the granulite facies in the area because it is buffered by grandidierite and kornerupine on boron. Some compositional featares of the melt and volatiles in metamorphism and incongruent melting can be reflected by the changes in the composition of tourmaline and the compovents of the mineral assemblages.