Relationship between volcanic activity and enrichment of shale organic matter during the Ordovician-Silurian transition in western Hubei, Southern China

Shen, Jingjin; Pengwan, Wang; Chen, Kongquan; Zhang, Dongtao; Wang, Yuman; Cai, Quansheng; Meng, Jianghui

doi:10.1016/j.palaeo.2021.110551

Cited by 9 publications

(1 citation statement)

References 49 publications

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“…Multiple layers of potash bentonite are present in the black shales of the Wufeng-Longmaxi Formation in the Yangtze Block (Figure 2C). They are a product of the deposition and alteration of volcanic ash (Hu et al, 2009;Su et al, 2009;Du et al, 2021;Shen et al, 2021) generated by volcanic activity on the southeastern margin of the Yangtze Block (Su et al, 2009). The thickness of the potash bentonite in the black shales shows a gradual decrease from the southern margin to the northern margin of the Yangtze Block (Su et al, 2009).…”

Section: Paleoenvironmental Modes During the Deposition Of The Wufeng...mentioning

confidence: 99%

Earth’s Orbital Control on Organic Matter Enrichment in the Black Shales of the Wufeng–Longmaxi Formation in the Upper Yangtze Region, South China

Zhao

et al. 2022

Front. Earth Sci.

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China’s most successful horizon for shale-gas exploration and development is the Upper Ordovician Wufeng Formation through the Lower Silurian Longmaxi Formation in its Upper Yangtze Region. In this study, the Wufeng–Longmaxi Formation black shales in the Upper Yangtze Region are analysed to determine their microstructural characteristics, total organic carbon (TOC) content, and well log characteristics and to identify information on the parameters of Earth’s orbit from its gamma-ray (GR) data series. Then, paleoenvironmental modes are established over a long time scale. On this basis, the Earth’s orbital control on organic matter enrichment in the black shales is examined. The black shales of the Wufeng Formation and the lower Longmaxi Formation are rich in biogenic siliceous fossils and framboidal pyrite. Their TOC content, GR value, and uranium (U) content increase gradually from the bottom of the Wufeng Formation to the Guanyinqiao Member at its top, peak at the Guanyinqiao Member, and then decrease gradually up to the Longmaxi Formation. Approximately six and seven long eccentricity cycles can be identified from the GR curves of the Wufeng Formation and the lower Longmaxi Formation, respectively. During the long eccentricity minima, corresponding to Earth’s cold period, the black shales have a relatively high level of enrichment of organic matter. This study can provide an important reference for investigating the mechanism by which Earth’s orbits control the climate and sedimentary environment, as well as the mechanism of organic matter enrichment.

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Section: Paleoenvironmental Modes During the Deposition Of The Wufeng...mentioning

confidence: 99%

Earth’s Orbital Control on Organic Matter Enrichment in the Black Shales of the Wufeng–Longmaxi Formation in the Upper Yangtze Region, South China

Zhao

et al. 2022

Front. Earth Sci.

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Organic matter accumulation mechanisms in the Wufeng-Longmaxi shales in western Hubei Province, China and paleogeographic implications for the uplift of the Hunan-Hubei Submarine high

Zhou

Nie

et al. 2023

International Journal of Coal Geology

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Sedimentary paleoenvironment and organic matter accumulation model of the Lower Silurian Gaojiabian Formation shales in the Lower Yangtze region, South China

Li¹,

Liu²,

Cen³

et al. 2023

Geoenergy Science and Engineering

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Relationship between volcanic activity and enrichment of shale organic matter during the Ordovician-Silurian transition in western Hubei, Southern China

Cited by 9 publications

References 49 publications

Earth’s Orbital Control on Organic Matter Enrichment in the Black Shales of the Wufeng–Longmaxi Formation in the Upper Yangtze Region, South China

Earth’s Orbital Control on Organic Matter Enrichment in the Black Shales of the Wufeng–Longmaxi Formation in the Upper Yangtze Region, South China

Organic matter accumulation mechanisms in the Wufeng-Longmaxi shales in western Hubei Province, China and paleogeographic implications for the uplift of the Hunan-Hubei Submarine high

Sedimentary paleoenvironment and organic matter accumulation model of the Lower Silurian Gaojiabian Formation shales in the Lower Yangtze region, South China

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