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    Volume 29 Issue 1
    Jan.  2004
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    Article Contents
    WANG Wei-feng, TAN Jing, ZHANG De, WANG Qing-jian, TIAN Jing-min, TIAN Shi-de, 2004. Raman Spectra Study on Silicate Melt Structure at Basaltic Composition Region. Earth Science, 29(1): 39-44.
    Citation: WANG Wei-feng, TAN Jing, ZHANG De, WANG Qing-jian, TIAN Jing-min, TIAN Shi-de, 2004. Raman Spectra Study on Silicate Melt Structure at Basaltic Composition Region. Earth Science, 29(1): 39-44.

    Raman Spectra Study on Silicate Melt Structure at Basaltic Composition Region

    • Received Date: 2003-03-20
    • Publish Date: 2004-01-25
    • 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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