Mineralogy and Geochemistry of the No. 5<sup>−2</sup> High-Sulfur Coal from the Dongpo Mine, Weibei Coalfield, Shaanxi, North China, with Emphasis on Anomalies of Gallium and Lithium
This paper reports the mineral compositions and geochemical characteristics of the No. 5<sup>−2</sup> high-sulfur coal (Taiyuan Formation) from Dongpo Mine, Weibei Coalfield, Shaanxi, Northern China via transmitted and reflected light microscopy, scanning electron microscope eq...
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| Format: | Article |
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MDPI AG
2019-06-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/9/7/402 |
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| author | Guohong Qin Daiyong Cao Yingchun Wei Anmin Wang Jincheng Liu |
| author_facet | Guohong Qin Daiyong Cao Yingchun Wei Anmin Wang Jincheng Liu |
| author_sort | Guohong Qin |
| collection | DOAJ |
| description | This paper reports the mineral compositions and geochemical characteristics of the No. 5<sup>−2</sup> high-sulfur coal (Taiyuan Formation) from Dongpo Mine, Weibei Coalfield, Shaanxi, Northern China via transmitted and reflected light microscopy, scanning electron microscope equipped with an energy-dispersive X-ray spectrometer (SEM-EDS), X-ray diffraction (XRD), inductively coupled plasma mass spectrometry (ICP-MS), and X-ray fluorescence spectrometry (XRF). We also confirmed the input of intermediate-felsic volcanic ashes into the Taiyuan Formation coals in Dongpo Mine, Weibei Coalfield. The results show that Dongpo coals are enriched in Ga and Li compared to the average values for world hard coals, and they are depleted in Al<sub>2</sub>O<sub>3</sub> compared to Chinese coals. The coal low temperature ash contains kaolinite, illite, quartz, calcite, pyrite, and to a lesser extent, chlorite, plagioclase, dolomite, ankerite, and apatite. The concentration anomalies of Ga and Li in No. 5<sup>−2</sup> high-sulfur coal were not caused by the Benxi Formation Bauxite, but by the influence of multiple geological factors. The Middle Proterozoic moyite from the Yinshan Oldland led to the slightly higher Ga and Li contents of the No. 5<sup>−2</sup> coal than those in world hard coals. Input of synchronization volcanic ash, injection of hydrothermal fluids during the syngenetic or early diagenetic stages and influence of seawater further contributed to the Ga and Li enrichment of the No. 5<sup>−2</sup> coal. |
| first_indexed | 2024-04-12T07:53:08Z |
| format | Article |
| id | doaj.art-5b7ff4cca2884c32bb68436c02f4d246 |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-04-12T07:53:08Z |
| publishDate | 2019-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-5b7ff4cca2884c32bb68436c02f4d2462022-12-22T03:41:33ZengMDPI AGMinerals2075-163X2019-06-019740210.3390/min9070402min9070402Mineralogy and Geochemistry of the No. 5<sup>−2</sup> High-Sulfur Coal from the Dongpo Mine, Weibei Coalfield, Shaanxi, North China, with Emphasis on Anomalies of Gallium and LithiumGuohong Qin0Daiyong Cao1Yingchun Wei2Anmin Wang3Jincheng Liu4College of Geoscience and Surveying Engineering, China University of Mining and Technology (Beijing), Beijing 10083, ChinaCollege of Geoscience and Surveying Engineering, China University of Mining and Technology (Beijing), Beijing 10083, ChinaCollege of Geoscience and Surveying Engineering, China University of Mining and Technology (Beijing), Beijing 10083, ChinaCollege of Geoscience and Surveying Engineering, China University of Mining and Technology (Beijing), Beijing 10083, ChinaCollege of Geoscience and Surveying Engineering, China University of Mining and Technology (Beijing), Beijing 10083, ChinaThis paper reports the mineral compositions and geochemical characteristics of the No. 5<sup>−2</sup> high-sulfur coal (Taiyuan Formation) from Dongpo Mine, Weibei Coalfield, Shaanxi, Northern China via transmitted and reflected light microscopy, scanning electron microscope equipped with an energy-dispersive X-ray spectrometer (SEM-EDS), X-ray diffraction (XRD), inductively coupled plasma mass spectrometry (ICP-MS), and X-ray fluorescence spectrometry (XRF). We also confirmed the input of intermediate-felsic volcanic ashes into the Taiyuan Formation coals in Dongpo Mine, Weibei Coalfield. The results show that Dongpo coals are enriched in Ga and Li compared to the average values for world hard coals, and they are depleted in Al<sub>2</sub>O<sub>3</sub> compared to Chinese coals. The coal low temperature ash contains kaolinite, illite, quartz, calcite, pyrite, and to a lesser extent, chlorite, plagioclase, dolomite, ankerite, and apatite. The concentration anomalies of Ga and Li in No. 5<sup>−2</sup> high-sulfur coal were not caused by the Benxi Formation Bauxite, but by the influence of multiple geological factors. The Middle Proterozoic moyite from the Yinshan Oldland led to the slightly higher Ga and Li contents of the No. 5<sup>−2</sup> coal than those in world hard coals. Input of synchronization volcanic ash, injection of hydrothermal fluids during the syngenetic or early diagenetic stages and influence of seawater further contributed to the Ga and Li enrichment of the No. 5<sup>−2</sup> coal.https://www.mdpi.com/2075-163X/9/7/402coalhigh sulfurgalliumlithiumanomaliesmineralogyoriginvolcanic ash |
| spellingShingle | Guohong Qin Daiyong Cao Yingchun Wei Anmin Wang Jincheng Liu Mineralogy and Geochemistry of the No. 5<sup>−2</sup> High-Sulfur Coal from the Dongpo Mine, Weibei Coalfield, Shaanxi, North China, with Emphasis on Anomalies of Gallium and Lithium Minerals coal high sulfur gallium lithium anomalies mineralogy origin volcanic ash |
| title | Mineralogy and Geochemistry of the No. 5<sup>−2</sup> High-Sulfur Coal from the Dongpo Mine, Weibei Coalfield, Shaanxi, North China, with Emphasis on Anomalies of Gallium and Lithium |
| title_full | Mineralogy and Geochemistry of the No. 5<sup>−2</sup> High-Sulfur Coal from the Dongpo Mine, Weibei Coalfield, Shaanxi, North China, with Emphasis on Anomalies of Gallium and Lithium |
| title_fullStr | Mineralogy and Geochemistry of the No. 5<sup>−2</sup> High-Sulfur Coal from the Dongpo Mine, Weibei Coalfield, Shaanxi, North China, with Emphasis on Anomalies of Gallium and Lithium |
| title_full_unstemmed | Mineralogy and Geochemistry of the No. 5<sup>−2</sup> High-Sulfur Coal from the Dongpo Mine, Weibei Coalfield, Shaanxi, North China, with Emphasis on Anomalies of Gallium and Lithium |
| title_short | Mineralogy and Geochemistry of the No. 5<sup>−2</sup> High-Sulfur Coal from the Dongpo Mine, Weibei Coalfield, Shaanxi, North China, with Emphasis on Anomalies of Gallium and Lithium |
| title_sort | mineralogy and geochemistry of the no 5 sup 2 sup high sulfur coal from the dongpo mine weibei coalfield shaanxi north china with emphasis on anomalies of gallium and lithium |
| topic | coal high sulfur gallium lithium anomalies mineralogy origin volcanic ash |
| url | https://www.mdpi.com/2075-163X/9/7/402 |
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