Investigation of Organic Matter Sources and Depositional Environment Changes for Terrestrial Shale Succession from the Yuka Depression: Implications from Organic Geochemistry and Petrological Analyses

Liu, S. G.; Jiang, Lian; Liu, Bangjun; Zhao, Cunliang; Tang, Shuheng; Tan, Fang

doi:10.1007/s12583-022-1617-1

Cited by 6 publications

(5 citation statements)

References 65 publications

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“…The different distribution patterns of n-alkane could indicate different origins of organic matter (Liu et al, 2022a(Liu et al, , 2022cMoldowan et al, 1985). For example, terrestrial plants-derived organic matter commonly contains more n-alkanes than aquatic matter (Peters et al, 2005;Zhang et al, 2023).…”

Section: Sources Of Organic Mattermentioning

confidence: 99%

“…Charcoal has been considered to be the direct evidence of wildfire in geological time (Liu et al, 2022a(Liu et al, , 2022cScott, 2000;Sun et al, 2017). Inertinite of coal macerals are equivalent to charcoal, which has also been used as indicators for wildfire (Xu et al, 2020).…”

Section: Wildfire and Paleoclimatementioning

confidence: 99%

“…Coal is key to understand the history of the Earth, with a high-resolution record of past environmental changes. Numerous researchers have used maceral composition and different discrete indicators or combinations of proxies, aiming to extract geological information from coal on paleoenvironmental, paleoclimatic, and paleobotanical aspects during the evolution of swamp→peat →coal (Dai et al, 2020;Diessel, 1982;Liu et al, 2022aLiu et al, , 2022cVu et al, 2009;Zieger and Littke, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Maceral and Organic Geochemical Characteristics of the No. 6 Coal Seam from the Haerwusu Surface Mine, Inner Mongolia, China

Wang

Jin

Wang

2023

Energy Exploration & Exploitation

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Haerwusu Surface Mine of the Jungar Coalfield is a large coal mine. Its coal formation environments have not been reported in detail. In order to reconstruct the paleoenvironment of the peat formation, nine samples were collected, and were analyzed using microscope, column chromatography, gas chromatography (GC), and gas chromatography–mass spectrometry (GC–MS). According to the results of the microscopic analysis, the average random vitrinite reflectance ( Rr) is 0.73%, indicating a low rank bituminous coal. Vitrinite group is the predominant macerals with an average content of 54.54%, followed by inertinite group with an average of 35.99%. The higher inertinite contents indicate widespread wildfire events during the peat formation. The distribution pattern of n-alkanes, the cross plot between Pr/ n-C17 and Ph/ n-C18, the lower saturated/aromatic hydrocarbon ratios (0.22–0.68) and the presence of cadalene, retene, simonellite indicates that the organic matter is predominantly terrestrial higher plants with a small amount of aquatic organisms. The ternary diagram of Pr/Ph, Pr/ n-C17 and Ph/ n-C18 and the relative abundance of fluorene, dibenzofuran and dibenzothiophene indicate a continental–oceanic alternative facies. The higher contents of combustion-derived PAHs are also indicative of widespread wildfire events during peat formation.

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Section: Sources Of Organic Mattermentioning

confidence: 99%

Section: Wildfire and Paleoclimatementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Maceral and Organic Geochemical Characteristics of the No. 6 Coal Seam from the Haerwusu Surface Mine, Inner Mongolia, China

Wang

Jin

Wang

2023

Energy Exploration & Exploitation

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“…Major and trace elements are vital indicators for sedimentary environment reconstruction [21][22][23]52]. The element ratios of Sr/Ba, B/Ga, V/(V + Ni), CI, Sr/Cu, Fe/Mn, and Mo EF /U EF have ranges of 0.03 to 2.23, 1.17 to 4.92, 0.62 to 0.96, 0.19 to 0.89, 3.90 to 37.52, 25.19 to 247.17, 1.01 to 4.85, with their averages of 0.53, 3.43, 0.78, 0.41, 14.53, 109.01, 2.14, respectively (Table S2).…”

Section: Major and Trace Elements Datamentioning

confidence: 99%

“…Abundant diterpenoids (e.g., abietan and retene) are typically derived from gymnosperms, whereas angiosperms produce substantial quantities of triterpenoids (e.g., oleananes, ursanes, and lupanes) [18][19][20]. Additionally, some indicators are also used for assessing the thermal maturity, carbon content, kerogen types, and depositional environments of source rocks [21][22][23][24][25][26][27][28]. For instance, short-chain n-alkanes are predominantly related to aquatic sources (e.g., microphytoplankton), while abundant long-chain n-alkanes indicates extensive input of terrestrial organic carbon [29].…”

Section: Introductionmentioning

confidence: 99%

Paleoenvironmental Evolution and Organic Matter Accumulation in a Hydrocarbon-Bearing Depression in the East China Sea

Zhan,

Liu,

Chen

et al. 2023

JMSE

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Investigating the paleoenvironment and characteristics of source rocks in sedimentary basins is crucial for understanding organic matter accumulation and guiding hydrocarbon exploration. The Lishui Sag, a significant hydrocarbon-bearing depression in the East China Sea, has experienced extensive marine transgression and increasing salinity in the Paleocene, but the changes in accumulation factors of organic matter during this evolution process remain unclear. Through a comprehensive analysis of total organic carbon (TOC), major and trace elements, and biomarker data, this study investigates the characteristics of source rocks from two lithostratigraphic units, namely the Paleocene Yueguifeng and Lingfeng formations, to gain deep insight into the effects of paleoenvironment on organic matter accumulation and hydrocarbon distribution. Our results indicate that the Lishui Sag transitioned from a closed lake to an open-marine environment in the Paleocene, with a shift from warm-humid to arid climate conditions. The biomarker distribution suggests a change in the origin of organic matter, with a higher input of terrestrial organic matter in the Lingfeng Formation. During the early stage, the lacustrine source rocks in the lower Yueguifeng Formation were formed in a relatively humid and anoxic environment within brackish water, resulting in a substantial influx of terrestrial and lacustrine algae organic matter. In contrast, in the late stage, the marine source rocks in the overlying Lingfeng Formation were developed in an arid and oxidizing environment. The lacustrine source rocks in the Yueguifeng Formation were notably more favorable to developing good-quality source rocks. Compared with the other regions, the western and northeastern parts of the study area have greater hydrocarbon generation potential due to the wider distribution of high maturity and organic-rich source rocks, with higher terrestrial and algal organic matter input. Moreover, considering the practical circumstances in the exploration, the northeastern part of the Lishui Sag is recommended as the next exploration target zone.

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The mechanism of organic matter accumulation in the archipelago marine sediments: Insights from the Middle Devonian Givetian mudstone with low TOC in the Youjiang Basin, South China

Liu,

Shi,

et al. 2024

Marine and Petroleum Geology

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Investigation of Organic Matter Sources and Depositional Environment Changes for Terrestrial Shale Succession from the Yuka Depression: Implications from Organic Geochemistry and Petrological Analyses

Cited by 6 publications

References 65 publications

Maceral and Organic Geochemical Characteristics of the No. 6 Coal Seam from the Haerwusu Surface Mine, Inner Mongolia, China

Maceral and Organic Geochemical Characteristics of the No. 6 Coal Seam from the Haerwusu Surface Mine, Inner Mongolia, China

Paleoenvironmental Evolution and Organic Matter Accumulation in a Hydrocarbon-Bearing Depression in the East China Sea

The mechanism of organic matter accumulation in the archipelago marine sediments: Insights from the Middle Devonian Givetian mudstone with low TOC in the Youjiang Basin, South China

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