Characteristics of the coal quality and elemental geochemistry in Permian coals from the Xinjier mine in the Huainan Coalfield, north China: Influence of terrigenous inputs
Ding Dianshi1,2; Liu Guijian1,2; Fu Biao1; Qi Cuicui1
2018-03-01
发表期刊JOURNAL OF GEOCHEMICAL EXPLORATION
卷号186期号:2018页码:50-60
文章类型Article
摘要

Fifty-six coals along with host rocks of Permian age (including samples from the Shanxi Formation, Lower Shihezi Formation and Upper Shihezi Formation) collected from the active Xinjier mine in the Huainan Coalfield, north China were studied in the present work. The overall object of this study was to characterize the coal quality and elucidate the possible genetic types for trace-element enrichment of Xinjier coals. Based on Chinese National Standards, all the coals can be classified as medium-high-volatile to high-volatile coal and ultra-low sulfur to low sulfur coal. The vitrinite-dominated Xinjier coals show phyiso-chemical properties difference along the coal-bearing strata. Compared to the coals of the Shanxi Formation, vitrinite contents are elevated in the coals of the Lower Shihezi and Upper Shihezi Formations, which indicates that they were probably exposed to a more reducing environment during peat accumulation. Most elements, such as Al2O3, K2O, Y, Se, and Sb, are enriched compared to those of Chinese and World coals. The major-element oxides Al2O3 and K2O as well as trace elements Th and Y increase from the lower to upper seams. Some elements are distinctly concentrated in host rocks (roof, floor, and parting) compared with adjacent coals. These geochemical anomalies and "increasing stratigraphically upward" ash yield trend are attributed to influence from terrigenous inputs. Elements in Xinjier coals were classified into three geochemical groups based on the statistical analysis. In particular, sequential extraction experiments of selected coals found that As, Se, and Sb predominantly occur as organic associations in coal.

关键词Coal Quality Element Distribution Mode Of Occurrence Terrigenous Input Huainan Coalfield
WOS标题词Science & Technology ; Physical Sciences
DOI10.1016/j.gexplo.2017.12.002
关键词[WOS]Trace-elements ; Inner-mongolia ; Wuda Coalfield ; Antimony ; Anhui ; Selenium ; Mercury ; Sulfur ; Basin ; Modes
收录类别SCI
语种英语
WOS研究方向Geochemistry & Geophysics
WOS类目Geochemistry & Geophysics
WOS记录号WOS:000425299400005
引用统计
被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5197
专题黄土与第四纪地质国家重点实验室(2010~)
作者单位1.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Anhui, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Shaanxi, Peoples R China
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Ding Dianshi,Liu Guijian,Fu Biao,et al. Characteristics of the coal quality and elemental geochemistry in Permian coals from the Xinjier mine in the Huainan Coalfield, north China: Influence of terrigenous inputs[J]. JOURNAL OF GEOCHEMICAL EXPLORATION,2018,186(2018):50-60.
APA Ding Dianshi,Liu Guijian,Fu Biao,&Qi Cuicui.(2018).Characteristics of the coal quality and elemental geochemistry in Permian coals from the Xinjier mine in the Huainan Coalfield, north China: Influence of terrigenous inputs.JOURNAL OF GEOCHEMICAL EXPLORATION,186(2018),50-60.
MLA Ding Dianshi,et al."Characteristics of the coal quality and elemental geochemistry in Permian coals from the Xinjier mine in the Huainan Coalfield, north China: Influence of terrigenous inputs".JOURNAL OF GEOCHEMICAL EXPLORATION 186.2018(2018):50-60.
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