Impact of Terrigenous Organic Matter Input on Organic Matter Enrichment of Paleocene Source Rocks, Lishui Sag, East China Sea
To clarify the organic matter (OM) enrichment of the Lishui Sag, the factors influencing the variable abundance of OM in the Lingfeng Formation are studied using organic geochemical data. The source rocks of the Lingfeng Formation have medium–high total organic carbon (TOC) values (0.53–3.56%). The...
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MDPI AG
2023-02-01
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| Online Access: | https://www.mdpi.com/1996-1073/16/4/2046 |
| _version_ | 1811153816568987648 |
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| author | Xu Han Dujie Hou Xiong Cheng Yan Li |
| author_facet | Xu Han Dujie Hou Xiong Cheng Yan Li |
| author_sort | Xu Han |
| collection | DOAJ |
| description | To clarify the organic matter (OM) enrichment of the Lishui Sag, the factors influencing the variable abundance of OM in the Lingfeng Formation are studied using organic geochemical data. The source rocks of the Lingfeng Formation have medium–high total organic carbon (TOC) values (0.53–3.56%). The main type of kerogen is II2-III. Compared to the shallow marine subfacies source rocks, the TOC of the delta front subfacies source rocks is higher. The distribution of biomarkers shows that the redox environment of the delta front subfacies source rock is the sub-oxidizing and oxic environment, and the source rock is mainly supplied by terrigenous higher plants; the redox environment of shallow marine subfacies source rocks is a sub-reducing and suboxic environment, and the OM mainly comes from algae. The link between OM input and OM abundance demonstrates that terrigenous OM (TOM) input has a considerable influence on OM abundance. However, there is no obvious relationship between preservation and OM abundance, which suggests that preservation is not the determining element in OM enrichment. The strong sediment flux decreases the amount of time that OM is exposed to oxygen. As a result, delta front subfacies with large TOM input have a huge number of excellent source rocks. This paper proposes a “delta front-OM input model” for excellent source rocks. |
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| id | doaj.art-a5a9aac5cb1140e4a4385321a5dc2a5d |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-11T08:52:05Z |
| publishDate | 2023-02-01 |
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| spelling | doaj.art-a5a9aac5cb1140e4a4385321a5dc2a5d2023-11-16T20:21:25ZengMDPI AGEnergies1996-10732023-02-01164204610.3390/en16042046Impact of Terrigenous Organic Matter Input on Organic Matter Enrichment of Paleocene Source Rocks, Lishui Sag, East China SeaXu Han0Dujie Hou1Xiong Cheng2Yan Li3School of Energy Resources, China University of Geosciences, Beijing 100083, ChinaSchool of Energy Resources, China University of Geosciences, Beijing 100083, ChinaSchool of Energy Resources, China University of Geosciences, Beijing 100083, ChinaSchool of Energy Resources, China University of Geosciences, Beijing 100083, ChinaTo clarify the organic matter (OM) enrichment of the Lishui Sag, the factors influencing the variable abundance of OM in the Lingfeng Formation are studied using organic geochemical data. The source rocks of the Lingfeng Formation have medium–high total organic carbon (TOC) values (0.53–3.56%). The main type of kerogen is II2-III. Compared to the shallow marine subfacies source rocks, the TOC of the delta front subfacies source rocks is higher. The distribution of biomarkers shows that the redox environment of the delta front subfacies source rock is the sub-oxidizing and oxic environment, and the source rock is mainly supplied by terrigenous higher plants; the redox environment of shallow marine subfacies source rocks is a sub-reducing and suboxic environment, and the OM mainly comes from algae. The link between OM input and OM abundance demonstrates that terrigenous OM (TOM) input has a considerable influence on OM abundance. However, there is no obvious relationship between preservation and OM abundance, which suggests that preservation is not the determining element in OM enrichment. The strong sediment flux decreases the amount of time that OM is exposed to oxygen. As a result, delta front subfacies with large TOM input have a huge number of excellent source rocks. This paper proposes a “delta front-OM input model” for excellent source rocks.https://www.mdpi.com/1996-1073/16/4/2046marine source rocksgeochemical characteristicsorganic matter enrichmentLingfeng FormationLishui Sag |
| spellingShingle | Xu Han Dujie Hou Xiong Cheng Yan Li Impact of Terrigenous Organic Matter Input on Organic Matter Enrichment of Paleocene Source Rocks, Lishui Sag, East China Sea Energies marine source rocks geochemical characteristics organic matter enrichment Lingfeng Formation Lishui Sag |
| title | Impact of Terrigenous Organic Matter Input on Organic Matter Enrichment of Paleocene Source Rocks, Lishui Sag, East China Sea |
| title_full | Impact of Terrigenous Organic Matter Input on Organic Matter Enrichment of Paleocene Source Rocks, Lishui Sag, East China Sea |
| title_fullStr | Impact of Terrigenous Organic Matter Input on Organic Matter Enrichment of Paleocene Source Rocks, Lishui Sag, East China Sea |
| title_full_unstemmed | Impact of Terrigenous Organic Matter Input on Organic Matter Enrichment of Paleocene Source Rocks, Lishui Sag, East China Sea |
| title_short | Impact of Terrigenous Organic Matter Input on Organic Matter Enrichment of Paleocene Source Rocks, Lishui Sag, East China Sea |
| title_sort | impact of terrigenous organic matter input on organic matter enrichment of paleocene source rocks lishui sag east china sea |
| topic | marine source rocks geochemical characteristics organic matter enrichment Lingfeng Formation Lishui Sag |
| url | https://www.mdpi.com/1996-1073/16/4/2046 |
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