Raman spectroscopy of intruded coals from the Illinois Basin: Correlation with rank and estimated alteration temperature
Raman spectroscopy of intruded coals from the Illinois Basin: Correlation with rank and estimated alteration temperature
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伊利诺伊盆地侵入煤的拉曼光谱：与等级和估计蚀变温度的相关性
DOI：
10.1016/j.coal.2019.103369
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发表时间：
2020-02
影响因子：
5.6
通讯作者：
Qinfu Liu
中科院分区：
文献类型：
--
作者：
Kuo Li;Susan M.Rimmer;Severin M.Presswood;Qinfu Liu
拉曼光谱被用来评估在火成岩侵入体附近采集的一系列煤的等级。在从低成熟度到极高成熟度的转变过程中(镜质组反射率从0.55%增加到5.0%)，镜质组和焦化煤的拉曼参数呈现出复杂的变化。随着煤级的增加，拉曼光谱表现出G带半高宽和D带强度均减小的趋势。在沥青化和脱沥青阶段，D带形状变得越来越不对称，而在无烟化阶段，D和G带的宽度继续减小，而D带强度增加。在变无烟煤中(如在湖南的辅助样品中所见)，由于D2带的存在，G带的强度较低，并经历了明显的展宽。镜质组和惰质组显微组分的拉曼光谱参数的差异表明显微组分之间的分子结构不同；因此，如果不考虑不同的显微组分类型，煤的非均质性可能会对拉曼光谱结果产生显著影响。对于镜质组，拉曼光谱参数G FWHM和DAS/GA(面积(1100-S)/面积(S-1650年)，S是1100百万厘米−1到1650百万厘米−1之间的鞍点)与镜质组反射率(RR)和最高蚀变温度(TPeak)高度相关(R2>；0.9)，并允许在~70-300℃温度范围内建立可用于评价侵入煤温度的地质温度计。
Raman spectroscopy was used to evaluate rank for a series of coals collected adjacent to an igneous intrusion. For these intruded coals, Raman parameters for collotelinite and its coked equivalent show complex changes during the transformation from low to very high levels of maturity (with vitrinite reflectance increasing from 0.55% to 5.0%). With increasing coal rank up to anthracite-level reflectance, the Raman spectra show a decrease in both G band full width at half maximum (FWHM) and D band intensity. The D band shape becomes increasingly asymmetric during the bituminization and de-bituminization stages, whereas in the anthracitization stage, the width of the D and G bands continues to decrease while D band intensity increases. In meta-anthracites (as seen in the ancillary Hunan samples), the G band has a low intensity and undergoes an apparent broadening due to the presence of the D2 band that occurs as a shoulder on the G band.Differences in Raman spectral parameters for vitrinite and inertinite macerals suggest differences in molecular structure between the macerals; as such, the heterogeneous nature of coal may affect Raman spectral results significantly if different maceral types are not considered. Within individual samples, Raman spectra indicate a high level of structural homogeneity between and within vitrinite particles, allowing assessment of differences between samples of different ranks.For vitrinite, the Raman spectral parameters G FWHM and DAs/GA (Area(1100-s)/Area(s-1650), s is the saddle point between 1100 cm−1and 1650 cm−1) are highly correlated (R2> 0.9) with vitrinite reflectance (Rr) and maximum alteration temperature (Tpeak), and allow establishment of geothermometers over the temperature range of ~70–300 °C that can be used to evaluate temperatures attained in intruded coals.
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影响因子：
5.6
作者：
R. Morga
通讯作者：
R. Morga
影响因子：
3.5
作者：
A. Hood;C. Gutjahr;R. L. Heacock
通讯作者：
A. Hood;C. Gutjahr;R. L. Heacock
影响因子：
10.9
作者：
KATAGIRI, G;ISHIDA, H;ISHITANI, A
通讯作者：
ISHITANI, A
DOI：
--
发表时间：
1993
期刊：
--
影响因子：
--
作者：
J. R. Levine
通讯作者：
J. R. Levine
影响因子：
2.2
作者：
E. Quirico;P. Raynal;M. Bourot-Denise
通讯作者：
E. Quirico;P. Raynal;M. Bourot-Denise