| 光谱学与光谱分析 |
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| The Spectrum Studies of Structure Characteristics in Magma Contact Metamorphic Coal |
| WU Dun, SUN Ruo-yu, LIU Gui-jian*, YUAN Zi-jiao |
| Key Laboratory of Crust-Mantle Material and Environments, Chinese Academy of Sciences, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China |
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Abstract The structural parameters evolution of coal due to the influence of intrusions of hot magma was investigated and analyzed. X-ray diffraction and laser confocal microscope Raman spectroscopy were used to test and analyze 4 coal samples undergoing varying contact-metamorphism by igneous magmas in borehole No.13-4 of Zhuji coal mine, Huainan coalfield. The result showed that coal XRD spectrum showed higher background intensity, with the 26° and 42° nearby apparent graphite diffraction peak. Two significant vibration peaks of coal Raman spectra were observed in the 1 000~2 000 cm-1 frequency range: broad “D” peak at 1 328~1 369 cm-1 and sharp “G” peak at 1 564~1 599 cm-1. With the influence of magma intrusion, the relationship between coal structural parameters and coal ranks was excellent.
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Received: 2013-01-22
Accepted: 2013-04-10
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Corresponding Authors:
LIU Gui-jian
E-mail: lgj@ustc.edu.cn
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