Topical Collection "Minerals in Coal and Coal Combustion Products"

Editors

Guest Editor
Prof. Dr. Shifeng Dai

State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology (Beijing), Beijing 100083, China
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Interests: coal mineralogy; coal geochemistry; coal petrology; coal geochemistry; coal combustion products
Guest Editor
Dr. David French

School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW 2052, Australia
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Interests: coal geology and utilisation; mineralogy; geochemistry

Topical Collection Information

Dear Colleagues,

Minerals are very significant components of coal, from both academic and practical perspectives. The minerals and associated non-mineral inorganic elements may give rise to deleterious effects during coal preparation and utilization, such as stickiness and abrasion during preparation and ash deposition issues, corrosion, erosion and release of volatile pollutants, such as mercury and sulphur dioxide during combustion. Minerals in coal, in some cases, may be major carriers of critical elements, such as Ga and rare earth elements, or important base metals, such as Al, and such coals or their combustion products have potential as sources of those elements for industrial use.

From the genetic point of view, the minerals and non-mineral inorganic elements in coal are products of the processes associated with peat accumulation and rank advance, as well as, possibly, a range of epigenetic processes, and thus can provide information on the depositional conditions and geologic history of coal beds, coal-bearing sequences, and regional tectonic evolution. This Topical Collection on “Minerals in Coal and Coal Combustion Products” focuses on providing an up-to-date series of papers covering research and technological developments in the nature, origin, and significance of the minerals in coal, the transformations in the mineral matter during coal combustion, and the mineralogy of products derived from coal combustion processes.

Prof. Dr. Shifeng Dai
Dr. David French
Guest Editors

Manuscript Submission Information

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Keywords

  • minerals
  • coal
  • coal combustion products
  • non-mineral inorganic elements
  • trace elements

Related Special Issues

Published Papers (1 paper)

2018

Open AccessArticle Minerals and Enrichment of W, Rb, and Cs in Late Permian Coal from Meitian Mine, Meitian Coalfield, Southern China by Magmatic Hydrothermal Fluids
Minerals 2018, 8(11), 504; https://doi.org/10.3390/min8110504
Received: 22 September 2018 / Revised: 26 October 2018 / Accepted: 31 October 2018 / Published: 5 November 2018
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Abstract
We report on the effects of magmatic hydrothermal fluids on the mineralogical and geochemical compositions of 12U and 12L Coals from the Meitian Mine in the Meitian Coalfield, southern China. The minerals in 12U Coal are predominantly chlorite, quartz, and calcite, while the [...] Read more.
We report on the effects of magmatic hydrothermal fluids on the mineralogical and geochemical compositions of 12U and 12L Coals from the Meitian Mine in the Meitian Coalfield, southern China. The minerals in 12U Coal are predominantly chlorite, quartz, and calcite, while the minerals in 12L Coal consist mainly of illite, quartz, chlorite, kaolinite, and mixed-layer illite/smectite (I/S). The vesicle- and fracture-filling illite, chlorite, I/S, pyrite, and fluorite, cleat- and fracture-filling carbonate minerals (i.e., calcite, and dolomite), and cleat-filling tremolite, diopside, and talc have epigenetic hydrothermal origins. Tremolite, diopside, and talc were probably formed from the reaction between dolomite and Si-rich magmatic hydrothermal fluids. Elevated Pb–Zn–Sn–Cd assemblages are characteristic for the 12U Coal, while 12L Coal is enriched in W, Rb, Cs, Th, V, Zn, and Zr, most notably W, Rb, and Cs. REY (Rare Earth Elements and Yttrium) plots for almost all coals, partings and host rocks are similar, showing an M-type REY distribution, Gd-maximum, positive Y anomalies, and negative Ce anomalies, suggesting acid hydrothermal circulation in the coal-bearing strata. Rubidium and cesium in the coal is clearly associated with K-rich clay minerals (illite + I/S), and to a lesser extent with silicate minerals that were precipitated from hydrothermal solutions. W in the coals mainly occurs in the inorganic constituents of illite and pyrite, especially illite. Enrichment of W, Rb, and Cs in the coal and host rocks is genetically associated with magmatic hydrothermal fluids. Specifically, magmatic hydrothermal fluids of relatively high temperatures that are rich in volatile matter can extract abundant W, Rb, and Cs from granitic melts. The enrichment of these rare metals in the coal is mainly related to illitization. Our study results suggest that, for coal intruded by magmatic rocks, the type of hydrothermal alteration may greatly influence the enrichment of elements. Full article
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