Raman Spectra Study on Silicate Melt Structure at Basaltic Composition Region
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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Ab12 An3 6Di52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.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 Ab12An36Di52, 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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Key words:
- silicate melt /
- high-temperature Raman spectroscopy /
- melt structure /
- crystallization
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图 1 2个样品在Ab-An-Di三元相图中的位置(等值线单位为℃)
Fig. 1. Positions of two samples in Ab-An-Di ternary phase diagram
图 2 Ab10An29Di61样品的升温Raman光谱
Fig. 2. Raman spectra of glass, crystal and melt of Ab10An29Di61
图 3 Ab12An36Di52样品的升温Raman光谱
Fig. 3. Raman spectra of glass, crystal and melt of Ab12An36Di52
图 4 Ab10An29Di61样品在温度298 K高频区解谱图
Fig. 4. Gaussian deconvolution of stretch vibrational band at 298 K of Ab10An29Di61
图 5 Ab10An29Di61样品在温度1 573 K高频区解谱图
Fig. 5. Gaussian deconvolution of stretch vibrational band at 1 573 K of Ab10An29Di61
表 1 硅酸盐熔体的成分和有关参数
Table 1. Silicate melt composition and related parameters
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[1] McMillan, P.F., Poe, B.T., Gillet, P.H., et al., 1994. A study of SiO2 glass and supercooled liquid to 1 950 K via hightemperature Raman spectroscopy. Geochim. Cosmochim. Acta, 58: 3653- 3664. doi: 10.1016/0016-7037(94)90156-2 [2] McMillan, P.F., Wolf, G.H., Poe, B.T., 1992. Vibrational spectroscopy of silicate liquids and glasses. Chemical Geology, 96: 351- 366. doi: 10.1016/0009-2541(92)90064-C [3] Mo, X.X., 1985. The melts structure of magma. Geological Science and Technology Information, 4(2): 21- 31(in Chinese with English abstract). [4] Mysen, B.O., 1988. Structure and properties of silicate melts. Elsevier, Amsterdam. [5] Mysen, B.O., 1990. Role of Al in depolymerized, peralkaline aluminosilicate melts in the systems Li2O-Al2O3-SiO2 and K2O-Al2O3-SiO2. Am. Mineral, 75: 120- 134. [6] Mysen, B.O., 1996. Haploandesitic melts at magmatic temperatures: In-situ, high-temperature structure and properties of melts and the join K2Si4O9-K2(KAl)4O9 to 1 236℃ at atmospheric pressure. Geochim. Cosmochim. Acta, 60: 3665- 3685. doi: 10.1016/0016-7037(96)00198-6 [7] Mysen, B.O., 1999. Structure and properties of magmatic liquids: From haplobasalt to haploandesitic. Geochim. Cosmochim. Acta, 639(1): 95- 112. https://www.sciencedirect.com/science/article/pii/S0016703798002737 [8] Mysen, B.O., Finger, L.W., Virgo, D., 1982. Curving-fitting of Raman spectra of silicate glasses. Am. Mineral, 67: 686 - 695. https://pubs.geoscienceworld.org/msa/ammin/article/67/7-8/686/41408/Curve-fitting-of-Raman-spectra-of-silicate-glasses [9] Mysen, B.O., Frantz, J.O., 1994. Silicate melts at magmatic temperatures: In-situ structure determination to 1 651℃ and effect of temperature and bulk composition on the mixing behavior of structure units. Contrib. Mineral Petrol. , 117: 1- 14. doi: 10.1007/BF00307725 [10] Mysen, B.O., Frantz, J.O., 1996. Raman spectroscopy of silicate melts at magmatic temperatures: Na2O-SiO2, K2O- SiO2 and Li2O-SiO2 binary compositionsin the temperature range 25- 1 475℃. Chemical Geology, 96: 321- 332. [11] Seifert, F., Mysen, B.O., Virgo, D., 1982. Three-dimensional network structure of quenched melts(glass)in the systems SiO2 -NaAlO2, SiO2 -CaAl2O4and SiO2 -MgAl2O4. Am. Mineral, 67: 696- 717. [12] Tan, J., Zhao, S.R., Mo, X.X., et al., 1997. Magma immiscible controling rock composition and texture. Earth science— Journal ofChina University ofGeosciences, 22(2): 165- 170(in Chinese with English abstract). [13] Virgo, D., Mysen, B.O., Kuskiro, I., 1980. Anionic constitution of silicate melts quenched at 1 atm from Raman spectroscopy: Implications for the structure of igneous melts. Science, 208: 1371- 1373. doi: 10.1126/science.208.4450.1371 [14] Weill, D.F., Hone, R., Navrotsky, A., 1980. The igneous system NaAlSi3O8-CaAl2Si2O8-CaMgSi2O6 variations on a classic theme by Bowen. In: Hargraves, R.B., ed., Physics of magmatic processes. Princeton University Press, Princeton, New Jersey, 49- 92. [15] Ye, D.N., 1991. The use of silicate phase diagram. Material Geology, 14: 22- 25(in Chinese with English abstract). [16] You, J.L., Jiang, G.C., Wen, Q., et al., 2002. High-temperature Raman spectra and micro-structure study of Li2B4O7 crystal, glass and its melt. Chinese Journal of Light Scattering, 13(4): 240- 248(in Chinese with English abstract). [17] You, J.L., Jiang, G.C., Xu, K.D., et al., 2000. High-temperature Raman spectroscopic study of the structure of sodium disilicate crystal, glass and its melt. Spectroscopy and Spectral Analysis, 20(6): 797- 799(in Chinese with English abstract). https://pubmed.ncbi.nlm.nih.gov/12938472/ [18] You, J.L., Jiang, G.C., Yang, S.H., et al., 2001. Temperature dependence of the Raman spectra and phase transition of zirconia. Chinese Physics Letters, 18: 991- 993. doi: 10.1088/0256-307X/18/7/349 [19] Zhou, Y.D., 1994. Physical chemistry of abio-material. Wuhan University of Technology Press, Wuhan, 219- 236(in Chinese). [20] Zhu, W.G., Xie, H.S., Xu, J.A., et al., 1998. The study of melt structure of basaltic at 1 650 ℃, 1- 3 GPa. Chinese Science Bulletin, 43(14): 1562- 1566(in Chinese). [21] 莫宣学, 1985. 岩浆熔体结构. 地质科技情报, 4(2): 21- 31. https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ198502005.htm [22] 谭劲, 赵珊茸, 莫宣学, 等, 1997. 岩浆不混溶对岩石成分和结构的控制. 地球科学——中国地质大学学报, 22(2): 165- 170. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX702.011.htm [23] 叶大年, 1991. 硅酸盐相图的妙用. 建材地质, 14: 22- 25. https://www.cnki.com.cn/Article/CJFDTOTAL-LGFK199104006.htm [24] 尤静林, 蒋国昌, 文启, 等, 2002. Li2B4O7晶体、玻璃及其熔态结构的高温Raman光谱研究. 光散射学报, 13(4): 240 - 248. https://www.cnki.com.cn/Article/CJFDTOTAL-GSSX200104010.htm [25] 尤静林, 蒋国昌, 徐匡迪, 等, 2000. 二硅酸钠晶体、玻璃及其熔体结构的Raman光谱研究. 光谱学与光谱学分析, 20 (6): 797- 799. https://www.cnki.com.cn/Article/CJFDTOTAL-GUAN200006014.htm [26] 周亚栋, 1994. 无机材料物理化学. 武汉: 武汉工业大学出版社, 219- 236. [27] 朱卫国, 谢鸿森, 徐济安, 等, 1998.1 650 ℃, 1- 3 GPa下玄武岩熔体结构的实验研究. 科学通报, 43(14): 1562- 1566. https://www.cnki.com.cn/Article/CJFDTOTAL-KXTB199814024.htm -
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