深时成煤演化与成煤环境分析

李勇; 李锵; 刘乐; 丁蓉; 李玉洁; 许卫凯

doi:10.3799/dqkx.2026.206

Volume 51 Issue 7

Jul. 2026

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Li Yong, Li Qiang, Liu Le, Ding Rong, Li Yujie, Xu Weikai, 2026. Deep-Time Coal-Forming Evolution and Perspectives on Coal-Forming Environment Analysis. Earth Science, 51(7): 2482-2498. doi: 10.3799/dqkx.2026.206

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Li Yong, Li Qiang, Liu Le, Ding Rong, Li Yujie, Xu Weikai, 2026. Deep-Time Coal-Forming Evolution and Perspectives on Coal-Forming Environment Analysis. Earth Science, 51(7): 2482-2498. doi: 10.3799/dqkx.2026.206

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Deep-Time Coal-Forming Evolution and Perspectives on Coal-Forming Environment Analysis

doi: 10.3799/dqkx.2026.206

Li Yong^{1
,
,},
Li Qiang¹,
Liu Le¹,
Ding Rong^{2, 3},
Li Yujie¹,
Xu Weikai¹

1.
College of Geoscience and Surveying Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
2.
China United Coalbed Methane National Engineering Research Center, Beijing 100095, China
3.
PetroChina Coalbed Methane Co., Ltd., Beijing 100028, China

Received Date: 2026-06-17
Publish Date: 2026-07-25

Abstract

Abstract

Coal-forming environment analysis is an important basis for understanding coal-measure sedimentary processes, reconstructing paleoenvironmental evolution, and advancing coal geology theory. This paper systematically reviews the evolutionary characteristics of coal-forming environments through geologic time, the distribution and dynamic evolution of peat swamps, and traditional analytical methods for coal-forming environments based on macerals, microlithotypes, mineral-element geochemistry, and biomarkers, and discusses their applicability. The results show that the evolution of coal-forming environments through geologic time was jointly controlled by plant succession, climate change, and adjustments in sedimentary systems, resulting in marked differences in coal-forming plants, peat swamp types, and depositional settings in different periods. Peat swamps are widely developed in delta plains, tidal flat-lagoon systems, fluvial-lacustrine settings, and alluvial plains, and their formation and preservation are jointly constrained by water supply pattern, water-table condition, clastic input, and marine influence. Traditional coal-facies indices play an important role in coal-forming environment analysis, but their environmental significance is readily affected by vegetation composition, decomposition, water-table fluctuations, allochthonous input, and diagenetic-coalification modification. On this basis, it is suggested that coal-forming environment analysis should place greater emphasis on depositional-process constraints and strengthen the integrated identification of key controlling factors such as water supply pattern, water-table condition, clastic input, and preservation conditions. It is further proposed that coal-forming peat swamps can be simplified into three types: low moor mire, transitional mire, and high moor mire. A case study from the Ordos Basin shows that this approach is helpful for revealing the vertical evolutionary pattern of coal-forming environments and can provide a reference for coal-forming environment reconstruction and coal-measure sedimentary research.
- coal-forming environment,
- coal facies,
- peat swamp,
- depositional process,
- Ordos Basin

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References(71)

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Deep-Time Coal-Forming Evolution and Perspectives on Coal-Forming Environment Analysis

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