Genesis Study of Omphacite at High Pressure and High Temperature

被引：0

作者：

Xiao Ben-fu ^{[1
,3
]}

Yi Li ^{[1
]}

Wang Duo-jun ^{[2
]}

Xie Chao ^{[1
]}

Tang Xue-wu ^{[3
]}

Liu Lei ^{[1
]}

Cui Yue-ju ^{[1
]}

机构：

[1] China Earthquake Adm, Inst Earthquake Sci, Key Lab Earthquake Predict, Beijing 100049, Peoples R China

[2] Univ Chinese Acad Sci, Key Lab Computat Geodynam, Beijing 100049, Peoples R China

[3] Hunan Earthquake Bur, Engn Res Ctr, Changsha 410001, Hunan, Peoples R China

来源：

SPECTROSCOPY AND SPECTRAL ANALYSIS | 2013年 / 33卷 / 11期

关键词：

High pressure and high temperature; Omphacite; Raman spectra; Alkali basalt; Genesis; PHASE-TRANSITION; CLINOPYROXENES; PYROXENES; HYDROXYL; MANTLE;

D O I：

10.3964/j.issn.1000-0593(2013)11-2993-04

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

The melting and recrystallizing experiments of alkali basalt powder and mixture of pure oxides mixed as stoichiometry were performed at 3 GPa and 1 200 degrees C. Electronic microprobe analysis and Raman spectra showed that the recrystallized products were omphacites, the FWHM (full width at half maximum) of the Raman peak was narrow and its shape was sharp, which is attributed to the stable Si-O tetrahedral structure and the high degree of order in omphacite. Based on the results of previous studies, the influencing factors of omphacite genesis and its primary magma were discussed. The results showed that the formation of omphacite could be affected by many factors, such as the composition of parent rocks, the concentration of fluid in the system and the conditions of pressure and temperature. This result could support some experimental evidences on the genesis studies of omphacite and eclogite.

引用

页码：2999 / 3002

页数：4

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