极地研究

极地研究 ›› 1994, Vol. 6 ›› Issue (1): 4-10.

• 目次 •    下一篇

硅硼镁铝矿－柱晶石－电气石组合在南极的发现

任留东;刘小汉   

  • 出版日期:1994-03-30 发布日期:1994-03-30

OCCURRENCE OF THE ASSEMBLAGE GRANDIDIERITE, KORNERUPINE,AND TOURMALINE IN ANTARCTICA

  • Online:1994-03-30 Published:1994-03-30

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摘要：

硅硼镁铝矿、柱晶石和电气石组合产于东南极拉斯曼丘陵，三种矿物相互接触并表现出特定的顺序：电气石（Ｔｒｎ１）→硅硼镁铝矿→电气石（Ｔｒｎ２）→柱晶石→电气石（Ｔｒｎ３），表明其产出是受Ｂ２Ｏ３、Ｈ２Ｏ活度的时间演化而不是空间变化所控制。这一组合的出现对于变质作用环境及过程中组分性质是一个很好的限定

关键词: 硅硼镁铝矿,柱晶石,电气石,硼,演化

Abstract:

Grandidierite, kornerupine,and tourmaline occur in high grade pelitic gneisses from the Larsemann Hills,East Antarctica. The three minerals contact to each other and show a special order:Trn 1→Gdd→Trn 2→Krn→Trn 3,suggesting the occurrence of the assemblage is controlled by the temporal changes of the chemical potentials of B 2O 3 and H 2O.The discovery of the minerals is a good constraint on the setting and composition feature of metamorphism in the area.