Palaeoclimatic characteristics of the Late Jurassic-Cretaceous in Emei area, Sichuan Basin, China
The Late Mesozoic is a typical period for studying the greenhouse climate and the interaction of the Eearth’s systems. To expound the interaction between the evolution process of the terrestrial surface system and the environment in the Late Jurassic -Cretaceous, a typical profile with relatively co...
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Frontiers Media S.A.
2025-06-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2025.1607066/full |
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| author | Shuxia Li Fang Xiang Longyi Shao Fenghua Zhao Fenghua Zhao Hewen Ma Bin Xu Shenkai Sun |
| author_facet | Shuxia Li Fang Xiang Longyi Shao Fenghua Zhao Fenghua Zhao Hewen Ma Bin Xu Shenkai Sun |
| author_sort | Shuxia Li |
| collection | DOAJ |
| description | The Late Mesozoic is a typical period for studying the greenhouse climate and the interaction of the Eearth’s systems. To expound the interaction between the evolution process of the terrestrial surface system and the environment in the Late Jurassic -Cretaceous, a typical profile with relatively complete exposure of the Mesozoic strata in the Emei area of the Sichuan Basin, the Chuanzu Profile, was selected for this study. The sedimentary environment of the study area was qualitatively analysed based on the macroscopic characteristics of the lithostratigraphy of outcrop profiles in the field and the statistical data of detrital composition under a microscope. Factor analysis and the chemical alteration index after correction (CIAcorr) were used to quantitatively analyse the characteristics of major and trace elements. Finally, the palaeoclimatic evolutionary characteristics of the Late Jurassic-Cretaceous in the Emei area are systematically discussed. The results show that the formation of Cretaceous sediments in the Emei area of the Sichuan Basin is mainly controlled by climatic factors, but is little affected by tectonic activities, and the maturity of the rock clastic composition is relatively low; therefore, it should be a near-provenance deposit. The range of CIAcorr values was 55–79, indicating that the degree of chemical weathering of the provenance was weak to moderate. The palaeoclimate in the Late Jurassic gradually became humid from Early to Late; in the Early Cretaceous, it was semiarid to semihumid, with an extremely dry event occurring; and in the Late Cretaceous, it was semiarid and drier than that of the Early Cretaceous. |
| format | Article |
| id | doaj-art-04d3a7b9365f42f0a4277c283f5ebe0e |
| institution | OA Journals |
| issn | 2296-6463 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj-art-04d3a7b9365f42f0a4277c283f5ebe0e2025-08-20T02:23:23ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632025-06-011310.3389/feart.2025.16070661607066Palaeoclimatic characteristics of the Late Jurassic-Cretaceous in Emei area, Sichuan Basin, ChinaShuxia Li0Fang Xiang1Longyi Shao2Fenghua Zhao3Fenghua Zhao4Hewen Ma5Bin Xu6Shenkai Sun7College of Geoscience and Surveying Engineering, China University of Mining and Technology, Beijing, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chendu, ChinaCollege of Geoscience and Surveying Engineering, China University of Mining and Technology, Beijing, ChinaCollege of Geoscience and Surveying Engineering, China University of Mining and Technology, Beijing, ChinaHebei State Key Laboratory of Mine Disaster Prevention, North China Institute of Science and Technology, Beijing, ChinaCCTEG Xi’an Research Institute (Group) Co., Ltd., Xi’an, ChinaHebei State Key Laboratory of Mine Disaster Prevention, North China Institute of Science and Technology, Beijing, ChinaHebei State Key Laboratory of Mine Disaster Prevention, North China Institute of Science and Technology, Beijing, ChinaThe Late Mesozoic is a typical period for studying the greenhouse climate and the interaction of the Eearth’s systems. To expound the interaction between the evolution process of the terrestrial surface system and the environment in the Late Jurassic -Cretaceous, a typical profile with relatively complete exposure of the Mesozoic strata in the Emei area of the Sichuan Basin, the Chuanzu Profile, was selected for this study. The sedimentary environment of the study area was qualitatively analysed based on the macroscopic characteristics of the lithostratigraphy of outcrop profiles in the field and the statistical data of detrital composition under a microscope. Factor analysis and the chemical alteration index after correction (CIAcorr) were used to quantitatively analyse the characteristics of major and trace elements. Finally, the palaeoclimatic evolutionary characteristics of the Late Jurassic-Cretaceous in the Emei area are systematically discussed. The results show that the formation of Cretaceous sediments in the Emei area of the Sichuan Basin is mainly controlled by climatic factors, but is little affected by tectonic activities, and the maturity of the rock clastic composition is relatively low; therefore, it should be a near-provenance deposit. The range of CIAcorr values was 55–79, indicating that the degree of chemical weathering of the provenance was weak to moderate. The palaeoclimate in the Late Jurassic gradually became humid from Early to Late; in the Early Cretaceous, it was semiarid to semihumid, with an extremely dry event occurring; and in the Late Cretaceous, it was semiarid and drier than that of the Early Cretaceous.https://www.frontiersin.org/articles/10.3389/feart.2025.1607066/fullEmei areaLate Jurassic-Cretaceouspaleoclimatefactor analysischemical alteration index after correction (CIAcorr) |
| spellingShingle | Shuxia Li Fang Xiang Longyi Shao Fenghua Zhao Fenghua Zhao Hewen Ma Bin Xu Shenkai Sun Palaeoclimatic characteristics of the Late Jurassic-Cretaceous in Emei area, Sichuan Basin, China Frontiers in Earth Science Emei area Late Jurassic-Cretaceous paleoclimate factor analysis chemical alteration index after correction (CIAcorr) |
| title | Palaeoclimatic characteristics of the Late Jurassic-Cretaceous in Emei area, Sichuan Basin, China |
| title_full | Palaeoclimatic characteristics of the Late Jurassic-Cretaceous in Emei area, Sichuan Basin, China |
| title_fullStr | Palaeoclimatic characteristics of the Late Jurassic-Cretaceous in Emei area, Sichuan Basin, China |
| title_full_unstemmed | Palaeoclimatic characteristics of the Late Jurassic-Cretaceous in Emei area, Sichuan Basin, China |
| title_short | Palaeoclimatic characteristics of the Late Jurassic-Cretaceous in Emei area, Sichuan Basin, China |
| title_sort | palaeoclimatic characteristics of the late jurassic cretaceous in emei area sichuan basin china |
| topic | Emei area Late Jurassic-Cretaceous paleoclimate factor analysis chemical alteration index after correction (CIAcorr) |
| url | https://www.frontiersin.org/articles/10.3389/feart.2025.1607066/full |
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