[HTML][HTML] Recognition of peat depositional environments in coal: A review
Peat depositional environments, the sites where and conditions under which peat
accumulates, significantly influence a resultant coal's physical properties, chemical …
accumulates, significantly influence a resultant coal's physical properties, chemical …
Analysis, origin and significance of mineral matter in coal: An updated review
CR Ward - International Journal of Coal Geology, 2016 - Elsevier
The material classed as “mineral matter” in coal embraces crystalline mineral materials as
well as a range of inorganic elements that occur in non-crystalline form. This review outlines …
well as a range of inorganic elements that occur in non-crystalline form. This review outlines …
Altered volcanic ashes in coal and coal-bearing sequences: A review of their nature and significance
Volcanic ashes in coal and coal-bearing sequences typically occur as persistent bands
within coal seams (generally as tonsteins, but in a few cases as bentonites, K-bentonites, or …
within coal seams (generally as tonsteins, but in a few cases as bentonites, K-bentonites, or …
Lanthanide, yttrium, and zirconium anomalies in the Fire Clay coal bed, Eastern Kentucky
The Fire Clay coal bed in the Central Appalachian basin region contains a laterally-
persistent tonstein that is found in the coal throughout most of its areal extent. The tonstein …
persistent tonstein that is found in the coal throughout most of its areal extent. The tonstein …
Chemical and mineralogical compositions of silicic, mafic, and alkali tonsteins in the late Permian coals from the Songzao Coalfield, Chongqing, Southwest China
Silicic and alkali intra-seam tonsteins were discovered earlier in southwestern China. This
paper reports new data on the geochemical and mineralogical compositions of tonsteins …
paper reports new data on the geochemical and mineralogical compositions of tonsteins …
Distribution of rare earth elements in eastern Kentucky coals: indicators of multiple modes of enrichment?
Abstract Four eastern Kentucky Pennsylvanian coals (from oldest to youngest, the
Manchester, Pond Creek, Fire Clay, and Hazard coals) were examined for their total rare …
Manchester, Pond Creek, Fire Clay, and Hazard coals) were examined for their total rare …
Origin of minerals and elements in the Late Permian coals, tonsteins, and host rocks of the Xinde Mine, Xuanwei, eastern Yunnan, China
This paper reports the mineralogical and geochemical compositions of the Late Permian C2
and C3 coals (both medium volatile bituminous coal) from the Xinde Mine, near Xuanwei in …
and C3 coals (both medium volatile bituminous coal) from the Xinde Mine, near Xuanwei in …
Provenance of multi-stage volcanic ash recorded in the Late Carboniferous coal in the Jungar Coalfield, North China, and their contribution to the enrichment of critical …
S Zhang, W Xiu, B Sun, Q Liu - International Journal of Coal Geology, 2023 - Elsevier
The origins of partings within the Late Carboniferous No. 6 coal in the Jungar Coalfield,
North China, and their relationship to the enrichment of critical metals in the coal, is poorly …
North China, and their relationship to the enrichment of critical metals in the coal, is poorly …
[HTML][HTML] Mineralogical and geochemical characteristics of altered volcanic ashes (tonsteins and K-bentonites) from the latest Permian coal-bearing strata of western …
Although the geochemical and mineralogical characteristics and provenance of Permian-
Triassic boundary (PTB) widespread volcanic ashes from southern China have been well …
Triassic boundary (PTB) widespread volcanic ashes from southern China have been well …
Elements and phosphorus minerals in the middle Jurassic inertinite-rich coals of the Muli Coalfield on the Tibetan Plateau
The content, modes of occurrence, and origin of elements and phosphorus minerals in the
Jurassic coals of the Muli Coalfield, on the Tibetan Plateau, were investigated using optical …
Jurassic coals of the Muli Coalfield, on the Tibetan Plateau, were investigated using optical …