Organic matter enrichment in basin periphery: A case study of Wufeng-Longmaxi shale, Marcellus shale, and Ohio shale

Zhang, Tianyu; Jiang, Shu; Van der Land, Cees

doi:10.1016/j.sedgeo.2024.106668

Sedimentary Geology

2024

DOI: 10.1016/j.sedgeo.2024.106668

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Organic matter enrichment in basin periphery: A case study of Wufeng-Longmaxi shale, Marcellus shale, and Ohio shale

Tianyu Zhang,

Shu Jiang,

Cees Van der Land

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Re-Understanding the Sedimentary Environment of the Wufeng–Longmaxi Shales in the Sichuan Basin

Mao,

Chen,

Yang

et al. 2024

Applied Sciences

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The current understanding of organic matter enrichment in marine shales remains highly controversial. Most scholars argue that deeper water environments and warmer climates facilitate the enrichment of organic matter. However, this perspective contradicts the principles of carbon sequestration in environmental science, necessitating a more in-depth discussion of its underlying mechanisms. This article utilizes the Wufeng–Longmaxi shales in the Sichuan Basin as a case study and integrates the primary productivity and carbon sequestration patterns observed in modern water bodies to analyze the processes governing organic matter enrichment in shales. The findings indicate that the Wufeng–Longmaxi shales in the Sichuan Basin did not form in a deep-water shelf environment during a period of large-scale transgression; rather, they developed in a highly enclosed shallow-water environment during a regressive phase. The proximity to ancient land correlates with higher organic matter abundance and gas production, suggesting that the mineralization model closely resembles that of coal, thereby highlighting the significance of proximity to land and the supply of terrigenous materials. It can be concluded that the depositional environment of organic-matter-rich marine shales is characterized by four key attributes: a shallow water depth, proximity to land (with a supply of terrestrial materials), a high enclosure, and a cold climate.

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Re-Understanding the Sedimentary Environment of the Wufeng–Longmaxi Shales in the Sichuan Basin

Mao,

Chen,

Yang

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

show abstract

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Organic matter enrichment in basin periphery: A case study of Wufeng-Longmaxi shale, Marcellus shale, and Ohio shale

Cited by 1 publication

References 107 publications

Re-Understanding the Sedimentary Environment of the Wufeng–Longmaxi Shales in the Sichuan Basin

Re-Understanding the Sedimentary Environment of the Wufeng–Longmaxi Shales in the Sichuan Basin

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