Archived
This content is available here strictly for research, reference, and/or recordkeeping and as such it may not be fully accessible. If you work or study at University of Kentucky and would like to request an accessible version, please use the SensusAccess Document Converter.
Location
Lexington, Kentucky
Start Date
5-5-2026 1:00 PM
End Date
5-5-2026 1:30 PM
Description
The abundance of elements in coal is important not only because it provides a solid scientific and practical foundation for various geochemical comparisons, but also because it helps address broader questions in Earth Sciences. In this study, data on major and trace elements in global coals comprising hundreds of thousands of coal samples were compiled from peer-reviewed journal articles, books, various databases, dissertations, and technical reports. These data formed the basis for estimating element abundances in global coals presented in this study. All collected data were rigorously screened for reliability, and any records with questionable quality were excluded from the analysis. Boxplot analysis was then applied to estimate element abundances, and median values of ash yields and different forms of sulfur in global coals. The results primarily include the minimum and maximum values within the normal range; the median (the 50th percentile, representing the average abundance); and outliers for all global coals, low-rank coals, and medium- to high-rank coals. Additionally, these statistical parameters are also provided for coals from different major coal-forming periods (including Pennsylvanian (Late Carboniferous) and Early Permian, Late Permian, Late Triassic, Early and Middle Jurassic, Late Jurassic and Early Cretaceous, and Paleogene and Neogene), and Chinese coals and U.S coals.
Document Type
Presentation
Archival?
Archival
Included in
Energy Systems Commons, Environmental Indicators and Impact Assessment Commons, Environmental Monitoring Commons, Mining Engineering Commons, Oil, Gas, and Energy Commons, Structural Materials Commons, Sustainability Commons
Abundances of Elements in Global Coals
Lexington, Kentucky
The abundance of elements in coal is important not only because it provides a solid scientific and practical foundation for various geochemical comparisons, but also because it helps address broader questions in Earth Sciences. In this study, data on major and trace elements in global coals comprising hundreds of thousands of coal samples were compiled from peer-reviewed journal articles, books, various databases, dissertations, and technical reports. These data formed the basis for estimating element abundances in global coals presented in this study. All collected data were rigorously screened for reliability, and any records with questionable quality were excluded from the analysis. Boxplot analysis was then applied to estimate element abundances, and median values of ash yields and different forms of sulfur in global coals. The results primarily include the minimum and maximum values within the normal range; the median (the 50th percentile, representing the average abundance); and outliers for all global coals, low-rank coals, and medium- to high-rank coals. Additionally, these statistical parameters are also provided for coals from different major coal-forming periods (including Pennsylvanian (Late Carboniferous) and Early Permian, Late Permian, Late Triassic, Early and Middle Jurassic, Late Jurassic and Early Cretaceous, and Paleogene and Neogene), and Chinese coals and U.S coals.
