title: [The spectrum studies of structure characteristics in magma contact metamorphic coal].
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 degrees and 42 degrees 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.
authors.affiliation: 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. adam854621@163.com
authors.forename: Dun
authors.initials: D
authors.lastname: Wu
authors.affiliation: 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.
authors.forename: Ruo-Yu
authors.initials: RY
authors.lastname: Sun
authors.affiliation: 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.
authors.forename: Gui-Jian
authors.initials: GJ
authors.lastname: Liu
authors.affiliation: 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.
authors.forename: Zi-Jiao
authors.initials: ZJ
authors.lastname: Yuan