ORIGINAL RESEARCH article
Front. Earth Sci.
Sec. Geochemistry
Volume 13 - 2025 | doi: 10.3389/feart.2025.1643201
Study on coal facies evolution and coal-forming environment of the L 2 coal seam of in Juhugeng Mine, Muli Coalfield, Qinghai Province
Provisionally accepted
- Shaanxi Institute of Energy, Jinzhong, China
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Maceral composition in coal varies significantly under the influence of different sedimentary environments. This study applies coal petrology techniques to elucidate the controlling mechanisms of coal-forming environments on the maceral, focusing on the L2 coal seam from the Juhugeng Mine in the Muli Coalfield. The results reveal that the lower section of the L2 coal seam is predominantly composed of semi-bright coal, transitioning upwards into durain and semi-dull coal. Vitrinite is the dominant maceral, followed by inertinite, while clay minerals constitute the primary inorganic component. Based on vertical variations in coal facies, the L2 coal seam is subdivided into three evolutionary stages from bottom to top: a wet forest swamp facies, a wet herbaceous swamp facies, and a return to wet forest swamp facies. These transitions reflect dynamic changes in peat-forming conditions, likely driven by subtle shifts in hydrology, vegetation input, and clastic influx.
Keywords: Coal facies evolution, Macerals, Coal-forming environment, Juhugeng mine, Muli Coalfield
Received: 08 Jun 2025; Accepted: 01 Sep 2025.
Copyright: © 2025 Li and Wang. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Jing Li, Shaanxi Institute of Energy, Jinzhong, China
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