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采用Fourier变换红外光谱(F TIR)研究了大别山碧溪岭和双河地区超高压榴辉岩主要矿物中结构水在3 000~4 000 cm-1波段的红外光谱特征和含量. 研究表明, 超高压榴辉岩中绿辉石是最主要的结构水载体矿物(100~200 mg/g); 石榴石和石英基本不含或仅含微量的水; 副矿物金红石可以含大量的结构水(>1 000 mg/g); 柯石英不显示结构水的特征峰, 但存在明显的分子水特征谱. 研究成果为大别东部大陆深俯冲带中水的存在形式和含量提供了重要证据.
Fourier transform infrared spectroscopy (F TIR) was used to study the infrared spectra of structured water in the major mineral of ultrahigh-pressure eclogite from Bixi Mountains and Shuanghe, Dabie Mountains in the frequency range from 3000 to 4000 cm-1. Ophiolite is the dominant structural water carrier mineral (100-200 mg / g) in high-pressure eclogites; garnets and quartz are essentially free or only trace traces of water; and the paraproduct rutile can contain large amounts of structural water (> 1 000 mg / g). The coesite did not show the characteristic peaks of structural water, but there was an obvious molecular water characteristic spectrum. The research results provide important evidences for the existence form and content of the water in the deep subduction zone of the eastern Dabie Mountains.