Millennial-timescale thermogenic CO2 release preceding the Paleocene-Eocene Thermal Maximum

文献类型： 外文期刊

第一作者： Jiang, Shijun

作者： Jiang, Shijun;Wang, Yasu;Jiang, Shijun;Cui, Ying;De Palma, Maurizia;Naafs, B. David A.;Huang, Yizhou;Naafs, B. David A.;Huang, Yizhou;Jiang, Jingxin;Hu, Xiumian;Wu, Huaichun;Chu, Runjian;Gu, Yangguang;Wang, Jiuyuan;Ingalls, Miquela;Bralower, Timothy J.;Yang, Shiling;Zachos, James C.;Ridgwell, Andy

作者机构：

期刊名称：NATURE COMMUNICATIONS （ 影响因子：15.7； 五年影响因子：17.2 ）

ISSN：

年卷期： 2025 年 16 卷 1 期

页码：

收录情况： SCI

摘要： Geologic records support a short-lived carbon release, known as the pre-onset excursion (POE), shortly before the Paleocene-Eocene Thermal Maximum (PETM; similar to 56 Ma). However, the source and pace of the POE carbon release and its relationship to the PETM remain unresolved. Here we show a high-temporal-resolution stratigraphic record spanning the POE and PETM from the eastern Tethys Ocean that documents the evolution of surface ocean carbon cycle, redox and eutrophication, confirming the global nature of the POE. Biomarkers extracted from the sedimentary record indicate a smaller environmental perturbation during the POE than that during the PETM in the eastern Tethys Ocean. Earth system modeling constrained by observed delta C-13 and pH data indicates that the POE was driven by a largely thermogenic CO2 source, likely associated with sill intrusions prior to the main eruption phase of the North Atlantic Igneous Province and possibly biogeochemical feedbacks involving the release of biogenic methane.

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