Structural OH in mantle-derived clinopyroxene megacrysts from Nushan |
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Authors: | Qunke Xia Daogong Chen Lihe Guo |
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Affiliation: | (1) Department of Earth and Space Sciences, University of Science and Technology of China, 230026 Hefei, China;(2) Institute of Mineral Deposits, Chinese Academy of Geological Sciences, 100037 Beijing, China |
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Abstract: | Thirteen clinopyroxene megacrysts from Nushan Cenozoic basalts have been investigated by Fourier transform infrared spectrometer(FTIR). The results demonstrate that all samples contain trace amount of structural OH. Clinopyroxenes from Nushan show four groups of absorption bands, in which, 3 472–3 506 cm−1 is the major characteristic one. It is suggested that the position of major band is probably related to AI content: the position of major characteristic band for high-AI samples is around 3 470 cm−1, whereas that for low-AI samples around 3 620 cm−1. |
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Keywords: | structural OH clinopyroxene Nushan |
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