| Raman Spectrum Study on Quartz Exsolution in Omphacite of Eclogite and Its Tectonic Significances |
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| 作者姓名： | WangLu JinZhenmin HeMouchun |
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| 作者单位： | [1]GraduateSchool,ChinaUniversityofGeosciences,Wuhan430074 [2]FacultyofEarthSciences,ChinaUniversityofGeosciences,Wuhan430074 [3]FacultyofEarthResources,ChinaUniversityofGeosciences,Wuhan430074 |
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| 基金项目： | ThispaperissupportedbyChineseNationalKeyProjectforBasicResearch(G19990 7550 1) . |
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| 摘 要： | The studies on ultra-microstructue characteristics of quartz exsolution in eclogite and coesite in UHP eclogite of several localities are done with the appliance of laser Raman spectroscopy and Ustage. Research results show that the phase transformation of coesite-quartz in garnet and/or omphacite is a continuous process. Topological relationship is present between quartz exsolution in omphacite and its host mineral which shows orientations of two long axes of quartz exsolution parallel to (100) and (-101) of omphacite. At present, some scholars suggest that thequartz exsolution in omphacite of eclogite is the evidence of UHP metamorphism. However, temperature and pressure condition and the exsolution mechanism of oriented needlelike quartz in omphacite still remain undear. Tnerefore, further study should be enhanced on experimental research on exsolution mechanism of super-silicate clinopyroxene, which could provide experimental quantitative constraint on quartz exsolution as UHP indicator.
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| 关 键 词： | 光谱学 石英 脱溶 绿辉石 榴辉石 构造意义 |
Raman Spectrum Study on Quartz Exsolution in Omphacite of Eclogite and Its Tectonic Significances |
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| WangLu JinZhenmin HeMouchun.Raman Spectrum Study on Quartz Exsolution in Omphacite of Eclogite and Its Tectonic Significances[J].Journal of China University of Geosciences,2003,14(2):119-126. |
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| Authors: | Wang Lu Jin Zhenmin He Mouchun |
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| Abstract: | The studies on ultra microstructure characteristics of quartz exsolution in eclogite and coesite in UHP eclogite of several localities are done with the appliance of laser Raman spectroscopy and U stage. Research results show that the phase transformation of coesite quartz in garnet and/or omphacite is a continuous process. Topological relationship is present between quartz exsolution in omphacite and its host mineral which shows orientations of two long axes of quartz exsolution parallel to (100) and (-101) of omphacite. At present, some scholars suggest that the quartz exsolution in omphacite of eclogite is the evidence of UHP metamorphism. However, temperature and pressure condition and the exsolution mechanism of oriented needlelike quartz in omphacite still remain unclear. Therefore, further study should be enhanced on experimental research on exsolution mechanism of super silicate clinopyroxene, which could provide experimental quantitative constraint on quartz exsolution as UHP indicator. |
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| Keywords: | ultrahigh pressure eclogite coesite quartz exsolution Raman spectroscopy |
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