Decreased marine organic carbon burial during the Hirnantian glaciation
文献类型：期刊论文
| 作者 | Yang, Shengchao1,2,3,4; Fan, Junxuan2,3,4 |
| 刊名 | EARTH AND PLANETARY SCIENCE LETTERS
 |
| 出版日期 | 2025-03-15 |
| 卷号 | 654页码:8 |
| 关键词 | Hirnantian glaciation Marine carbon cycle HICE Late Ordovician |
| ISSN号 | 0012-821X |
| DOI | 10.1016/j.epsl.2025.119240 |
| 通讯作者 | Yang, Shengchao(scyang@smail.nju.edu.cn) ; Fan, Junxuan(jxfan@nju.edu.cn) |
| 英文摘要 | A significant glaciation occurred during the Late Ordovician Hirnantian Age, coinciding with the substantial positive Hirnantian Isotope Carbon Excursion (HICE, up to +7 %o). Modeling studies suggest that both events were driven by increased organic carbon burial; however, this hypothesis has not been substantiated with global sedimentary organic carbon data, hampering our understanding of the underlying causes of the Hirnantian glaciation and the HICE. In this study, we compiled data from 25 globally distributed sections along continental shelves, each stratigraphically constrained by graptolite biozonation, to elucidate the evolution of global organic carbon burial and the marine carbon cycle during the Late Ordovician to Early Silurian (Dicellograptus complexus to Akidograptus ascensus biozones, 449.13 to 443.07 Ma). Our results indicate a rapid decline in organic carbon burial from the late Katian to the early Hirnantian, coinciding with the onset of glaciation and the rising limb of the HICE, which is in contrast to the increased organic carbon burial indicated by modeling. This discrepancy between the geological record and modeling results suggests that variations in organic carbon burial may not be the primary driver of the Hirnantian glaciation and the HICE, and necessitates a reassessment of the global carbon cycling during the Late Ordovician. The diminished organic carbon burial during the glaciation is likely associated with redox-dependent remineralization of organic matter and increased organic matter degradation timescales, indicating that the organic carbon cycle functioned as a negative feedback mechanism to global cooling during the Late Ordovician. |
| WOS关键词 | SEA-LEVEL CHANGE ; LATE ORDOVICIAN ; ISOTOPE STRATIGRAPHY ; SEDIMENTATION-RATE ; ENVIRONMENTAL-CHANGES ; MASS EXTINCTION ; PRODUCTIVITY ; TRIGGER ; PRESERVATION ; EVOLUTION |
| 资助项目 | National Natural Science Foundation of China[42472026] ; China Postdoctoral Science Foundation[2022M711547] ; Fundamental Research Funds for the Central Universities[0206-14380146] ; Fundamental Research Funds for NIGPAS[NGBS202501] ; Fundamental Research Funds for NIGPAS[NGBS202424] ; [42102147] ; [92255301] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001422207800001 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for NIGPAS |
| 源URL | [http://ir.nigpas.ac.cn/handle/332004/44883]  |
| 专题 | 中国科学院南京地质古生物研究所 |
| 通讯作者 | Yang, Shengchao; Fan, Junxuan |
| 作者单位 | 1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China 2.Nanjing Univ, Sch Earth Sci & Engn, Nanjing 210023, Peoples R China 3.Nanjing Univ, Frontiers Sci Ctr Crit Earth Mat Cycling, Nanjing 210023, Peoples R China 4.Nanjing Univ, State Key Lab Mineral Deposits Res, Nanjing 210023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Shengchao,Fan, Junxuan. Decreased marine organic carbon burial during the Hirnantian glaciation[J]. EARTH AND PLANETARY SCIENCE LETTERS,2025,654:8. |
| APA | Yang, Shengchao,&Fan, Junxuan.(2025).Decreased marine organic carbon burial during the Hirnantian glaciation.EARTH AND PLANETARY SCIENCE LETTERS,654,8. |
| MLA | Yang, Shengchao,et al."Decreased marine organic carbon burial during the Hirnantian glaciation".EARTH AND PLANETARY SCIENCE LETTERS 654(2025):8. |
入库方式： OAI收割
来源：南京地质古生物研究所
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