| 玄武岩成分区熔体结构的Raman光谱研究 |
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| 引用本文： | 王卫锋,谭劲,张德,王青建,田靖民,田世德.玄武岩成分区熔体结构的Raman光谱研究[J].地球科学,2004,29(1):39-44. |
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| 作者姓名： | 王卫锋 谭劲 张德 王青建 田靖民 田世德 |
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| 作者单位： | 武汉市青山区建筑管理站,湖北武汉,430080;中国地质大学材料科学与化学工程学院,湖北武汉,430074;中国地质大学材料科学与化学工程学院,湖北武汉,430074;武汉市青山区建筑管理站,湖北武汉,430080 |
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| 基金项目： | 国家自然科学基金项目 (No .4990 3 0 0 5 ) |
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| 摘 要： | 采用半导体脉冲激光光源和时间分辨探测技术，对Ab—An—Di相图同结线附近处于玄武岩成分区的2个硅酸盐样品进行了升温过程的Raman光谱研究．研究了该成分区域中玻璃-晶体-熔体高温下的相转变、升温过程及其熔体的特征光谱的变化特点．发现高温熔体结构与低温玻璃结构存在明显区别，晶体对熔体结构有继承性．同时观察到了Ab12An36Di52在熔态时的分相作用，可能反映了该组分液态不混溶的发生．通过对高频区的解谱，初步探索了体系中各结构单元的种类及含量与温度的关系．
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| 关 键 词： | 硅酸盐熔体 高温Raman光谱 熔体结构 结晶相 |
| 文章编号： | 1000-2383(2004)01-0039-06 |
Raman Spectra Study on Silicate Melt Structure at Basaltic Composition Region |
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| WANG Wei-feng.Raman Spectra Study on Silicate Melt Structure at Basaltic Composition Region[J].Earth Science-Journal of China University of Geosciences,2004,29(1):39-44. |
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| Authors: | WANG Wei-feng |
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| Institution: | WANG Wei-feng~ |
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| Abstract: | Two silicate glass samples at basaltic composition region, which are near the cotectic-line in Ab-An-Di phase diagram, were studied by high-temperature Raman spectroscopy using pulsed semiconductor laser and time-resolved detection technique from 298 K to 1 673 K. Temperature-dependent characteristic spectra and phase transition of glass, crystal and melt were observed. It is obvious that there exist some differences between the structure of glass and melt. The heredity of crystal structure from melt structure is also discussed. The melt phase separation of Ab_(12)An_(36)Di_(52), occurred in the high-temperature melt state, is studied, which reveals a very important immiscible feature in magmatic process. The types and relative contents of the different structure units correlative to temperature are discussed by Gaussian deconvolution of the high-frequencies spectrum region. |
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| Keywords: | silicate melt high-temperature Raman spectroscopy melt structure crystallization |
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