IEECAS OpenIR  > 黄土与第四纪地质国家重点实验室(2010~)
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
Source PublicationJOURNAL OF GEOCHEMICAL EXPLORATION
Volume186Issue:2018Pages:50-60
SubtypeArticle
Abstract

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.

KeywordCoal Quality Element Distribution Mode Of Occurrence Terrigenous Input Huainan Coalfield
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.gexplo.2017.12.002
WOS KeywordTrace-elements ; Inner-mongolia ; Wuda Coalfield ; Antimony ; Anhui ; Selenium ; Mercury ; Sulfur ; Basin ; Modes
Indexed BySCI
Language英语
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000425299400005
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5197
Collection黄土与第四纪地质国家重点实验室(2010~)
Affiliation1.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
Recommended Citation
GB/T 7714
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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