[HTML][HTML] Modes of occurrence of elements in coal: A critical evaluation

S Dai, RB Finkelman, D French, JC Hower… - Earth-Science …, 2021 - Elsevier
Coal, containing all the elements that are present in nature and more than 200 minerals, has
a complex chemical structure, making it one of the most complex geological materials …

[HTML][HTML] Mineralogy and geochemistry of the Late Triassic coal from the Caotang mine, northeastern Sichuan Basin, China, with emphasis on the enrichment of the …

M Zhou, L Zhao, X Wang, VP Nechaev, D French… - Ore Geology …, 2021 - Elsevier
Comprehensive research on the concentrations, modes of occurrence, and origin of critical
elements in coal is significant from an economic point of view. Several previous …

[HTML][HTML] Mineralogy and enrichment of critical elements (Li and Nb-Ta-Zr-Hf-Ga) in the Pennsylvanian coals from the Antaibao Surface Mine, Shanxi Province, China …

S Di, S Dai, VP Nechaev, D French, IT Graham… - International Journal of …, 2023 - Elsevier
As a critical element, lithium plays an important role in a wide range of modern industries
and in particular, battery storage and new energy technologies. Lithium in coal has attracted …

Geochemical and mineralogical evidence for the formation of siderite in Late Permian coal-bearing strata from western Guizhou, SW China

M Shen, S Dai, D French, IT Graham, BF Spiro… - Chemical …, 2023 - Elsevier
This paper presents the results of the geochemical and mineralogical investigation of
siderite in the Late Permian coal-bearing strata from western Guizhou, SW China. Siderite …

[HTML][HTML] Geological factors controlling variations in the mineralogical and elemental compositions of Late Permian coals from the Zhijin-Nayong Coalfield, western …

J Liu, S Dai, H Song, VP Nechaev, D French… - International Journal of …, 2021 - Elsevier
Determination of the geochemical and mineralogical characteristics of coal can provide
useful information on the geological setting and evolution of coal basins and assist in …

Geochronology, mineralogy, and geochemistry of tonsteins from the Pennsylvanian Taiyuan formation of the Jungar Coalfield, Ordos Basin, North China

Z Zhang, D Lv, JC Hower, L Wang, Y Shen… - International Journal of …, 2023 - Elsevier
Altered volcanic ashes occur worldwide in coal-bearing sequences. The Carboniferous is
one of the important coal-forming periods but the altered volcanic ashes within coals in …

Critical element (Nb-Ta-Zr-Hf-REE-Ga-Th-U) mineralization in Late Triassic coals from the Gaosheng Mine, Sichuan Basin, southwestern China: Coupled effects of …

M Zhou, S Dai, X Wang, L Zhao, VP Nechaev… - International Journal of …, 2022 - Elsevier
Abstract The Nb-Ta-Zr-Hf-REY-Ga mineralization in the Late Permian coals in southwestern
China has been well investigated by several studies and has generally been attributed to …

Detrital UPb zircon geochronology, zircon LuHf and SrNd isotopic signatures of the Lopingian volcanic-ash-derived Nb-Zr-REY-Ga mineralized horizons from eastern …

N Wang, S Dai, VP Nechaev, D French, IT Graham… - Lithos, 2024 - Elsevier
The Lopingian altered volcanic-ash horizons in southwest China have attracted significant
attention due to highly-elevated concentrations of critical element Nb-Zr-REY-Ga. Despite …

[HTML][HTML] Origin of chamosite and berthierine: Implications for volcanic-ash-derived Nb-Zr-REY-Ga mineralization in the Lopingian sequences from eastern Yunnan, SW …

N Wang, D French, S Dai, IT Graham, L Zhao… - Journal of Asian Earth …, 2023 - Elsevier
Clay minerals are generally used as pivotal indicators to reveal diagenetic parameters such
as temperature and pH in hydrothermal ore-forming systems. Within the Late Permian Nb-Zr …

Mineralogy and geochemistry of the Middle Jurassic coal from the Hexi Mine, Shenfu Mining Area, Ordos Basin: With an emphasis on genetic indications of siderite

N Shang, J Liu, Q Han, R Jia, S Zhao - International Journal of Coal …, 2023 - Elsevier
Siderite is a common carbonate mineral in coal and usually contains geochemical
indications (elemental associations and isotopic compositions) for sedimentary …