Paleoclimate Variations Spanning the Past 29–4 Ma Inferred From Lipid Biomarkers and Carbon Isotopes in the Linxia Basin, Northeast Tibetan Plateau
Thick and continuous deposits in the Linxia Basin, located in the landing area of westerlies and monsoons, offer a good opportunity for understanding the climatic evolution and tectonic activities. However, detailed paleoclimate reconstruction based on lipid biomarkers was rare, which limited our fu...
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Frontiers Media S.A.
2022-04-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2022.861005/full |
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| author | Gen Wang Gen Wang Zhifu Wei Zhifu Wei Ting Zhang Ting Zhang Wei He Wei He Xueyun Ma Xueyun Ma Xiaoli Yu Xiaoli Yu Yongli Wang |
| author_facet | Gen Wang Gen Wang Zhifu Wei Zhifu Wei Ting Zhang Ting Zhang Wei He Wei He Xueyun Ma Xueyun Ma Xiaoli Yu Xiaoli Yu Yongli Wang |
| author_sort | Gen Wang |
| collection | DOAJ |
| description | Thick and continuous deposits in the Linxia Basin, located in the landing area of westerlies and monsoons, offer a good opportunity for understanding the climatic evolution and tectonic activities. However, detailed paleoclimate reconstruction based on lipid biomarkers was rare, which limited our further knowledge, even though there were some relevant reports regarding pollen assemblages, microbial communities. In the present study, we conducted systematic analyses on the lipid biomarkers and carbon isotope values of the sediments, in an effort to reconstruct the evolution history of paleoclimate and figure out the potential driving mechanism. Our results showed that the organic matter was from mixed sources including lower organisms and terrestrial higher plants. The organic matter sources varied in response to the change of paleoclimate conditions as revealed by the lipid-derived proxies and organic carbon isotopes. Significant climatic events like late Oligocene Warming, Mid-Miocene Climatic Optimum and aridification at ∼8.5 Ma were observed throughout the sequence. Our results further indicated that the paleoclimate conditions in the study area primarily followed the pace of long-term global cooling, and the aridification at ∼8.5 Ma was associated with the uplift of the Tibetan Plateau. |
| first_indexed | 2024-12-10T09:57:31Z |
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| id | doaj.art-1c4ab933027d4bff8566785baa6d7ac9 |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-12-10T09:57:31Z |
| publishDate | 2022-04-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-1c4ab933027d4bff8566785baa6d7ac92022-12-22T01:53:27ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632022-04-011010.3389/feart.2022.861005861005Paleoclimate Variations Spanning the Past 29–4 Ma Inferred From Lipid Biomarkers and Carbon Isotopes in the Linxia Basin, Northeast Tibetan PlateauGen Wang0Gen Wang1Zhifu Wei2Zhifu Wei3Ting Zhang4Ting Zhang5Wei He6Wei He7Xueyun Ma8Xueyun Ma9Xiaoli Yu10Xiaoli Yu11Yongli Wang12Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, ChinaKey Laboratory of Petroleum Resources, Lanzhou, ChinaNorthwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, ChinaKey Laboratory of Petroleum Resources, Lanzhou, ChinaNorthwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, ChinaKey Laboratory of Petroleum Resources, Lanzhou, ChinaNorthwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, ChinaKey Laboratory of Petroleum Resources, Lanzhou, ChinaNorthwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, ChinaKey Laboratory of Petroleum Resources, Lanzhou, ChinaNorthwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, ChinaKey Laboratory of Petroleum Resources, Lanzhou, ChinaKey Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, ChinaThick and continuous deposits in the Linxia Basin, located in the landing area of westerlies and monsoons, offer a good opportunity for understanding the climatic evolution and tectonic activities. However, detailed paleoclimate reconstruction based on lipid biomarkers was rare, which limited our further knowledge, even though there were some relevant reports regarding pollen assemblages, microbial communities. In the present study, we conducted systematic analyses on the lipid biomarkers and carbon isotope values of the sediments, in an effort to reconstruct the evolution history of paleoclimate and figure out the potential driving mechanism. Our results showed that the organic matter was from mixed sources including lower organisms and terrestrial higher plants. The organic matter sources varied in response to the change of paleoclimate conditions as revealed by the lipid-derived proxies and organic carbon isotopes. Significant climatic events like late Oligocene Warming, Mid-Miocene Climatic Optimum and aridification at ∼8.5 Ma were observed throughout the sequence. Our results further indicated that the paleoclimate conditions in the study area primarily followed the pace of long-term global cooling, and the aridification at ∼8.5 Ma was associated with the uplift of the Tibetan Plateau.https://www.frontiersin.org/articles/10.3389/feart.2022.861005/fulllate oligocenen-alkanesorganic matterstable organic carbon isotopesaridification |
| spellingShingle | Gen Wang Gen Wang Zhifu Wei Zhifu Wei Ting Zhang Ting Zhang Wei He Wei He Xueyun Ma Xueyun Ma Xiaoli Yu Xiaoli Yu Yongli Wang Paleoclimate Variations Spanning the Past 29–4 Ma Inferred From Lipid Biomarkers and Carbon Isotopes in the Linxia Basin, Northeast Tibetan Plateau Frontiers in Earth Science late oligocene n-alkanes organic matter stable organic carbon isotopes aridification |
| title | Paleoclimate Variations Spanning the Past 29–4 Ma Inferred From Lipid Biomarkers and Carbon Isotopes in the Linxia Basin, Northeast Tibetan Plateau |
| title_full | Paleoclimate Variations Spanning the Past 29–4 Ma Inferred From Lipid Biomarkers and Carbon Isotopes in the Linxia Basin, Northeast Tibetan Plateau |
| title_fullStr | Paleoclimate Variations Spanning the Past 29–4 Ma Inferred From Lipid Biomarkers and Carbon Isotopes in the Linxia Basin, Northeast Tibetan Plateau |
| title_full_unstemmed | Paleoclimate Variations Spanning the Past 29–4 Ma Inferred From Lipid Biomarkers and Carbon Isotopes in the Linxia Basin, Northeast Tibetan Plateau |
| title_short | Paleoclimate Variations Spanning the Past 29–4 Ma Inferred From Lipid Biomarkers and Carbon Isotopes in the Linxia Basin, Northeast Tibetan Plateau |
| title_sort | paleoclimate variations spanning the past 29 4 ma inferred from lipid biomarkers and carbon isotopes in the linxia basin northeast tibetan plateau |
| topic | late oligocene n-alkanes organic matter stable organic carbon isotopes aridification |
| url | https://www.frontiersin.org/articles/10.3389/feart.2022.861005/full |
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