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| DOI | 10.1038/s41561-022-00967-6 |
| Transient mobilization of subcrustal carbon coincident with Palaeocene–Eocene Thermal Maximum | |
| Gernon T.M.; Barr R.; Fitton J.G.; Hincks T.K.; Keir D.; Longman J.; Merdith A.S.; Mitchell R.N.; Palmer M.R. | |
| 发表日期 | 2022 |
| ISSN | 1752-0894 |
| 起始页码 | 573 |
| 结束页码 | 579 |
| 卷号 | 15期号:7 |
| 英文摘要 | Plume magmatism and continental breakup led to the opening of the northeast Atlantic Ocean during the globally warm early Cenozoic. This warmth culminated in a transient (170 thousand year, kyr) hyperthermal event associated with a large, if poorly constrained, emission of carbon called the Palaeocene–Eocene Thermal Maximum (PETM) 56 million years ago (Ma). Methane from hydrothermal vents in the coeval North Atlantic Igneous Province (NAIP) has been proposed as the trigger, though isotopic constraints from deep sea sediments have instead implicated direct volcanic carbon dioxide (CO2) emissions. Here we calculate that background levels of volcanic outgassing from mid-ocean ridges and large igneous provinces yield only one-fifth of the carbon required to trigger the hyperthermal. However, geochemical analyses of volcanic sequences spanning the rift-to-drift phase of the NAIP indicate a sudden ~220 kyr-long intensification of magmatic activity coincident with the PETM. This was likely driven by thinning and enhanced decompression melting of the sub-continental lithospheric mantle, which critically contained a high proportion of carbon-rich metasomatic carbonates. Melting models and coupled tectonic–geochemical simulations indicate that >104 gigatons of subcrustal carbon was mobilized into the ocean and atmosphere sufficiently rapidly to explain the scale and pace of the PETM. © 2022, The Author(s), under exclusive licence to Springer Nature Limited. |
| 语种 | 英语 |
| scopus关键词 | atmosphere-ocean coupling; carbon dioxide enrichment; Cenozoic; continental breakup; decompression; hydrothermal vent; magmatism; mobilization; Paleocene-Eocene boundary; thinning; Atlantic Ocean; Atlantic Ocean (Northeast) |
| 来源期刊 | Nature Geoscience
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/262175 |
| 作者单位 | School of Ocean & Earth Science, University of Southampton, Southampton, United Kingdom |
| 推荐引用方式 GB/T 7714 | Gernon T.M.； Barr R.； Fitton J.G.； Hincks T.K.； Keir D.； Longman J.； Merdith A.S.； Mitchell R.N.； Palmer M.R.. Transient mobilization of subcrustal carbon coincident with Palaeocene–Eocene Thermal Maximum[J],2022,15(7). |
| APA | Gernon T.M.； Barr R.； Fitton J.G.； Hincks T.K.； Keir D.； Longman J.； Merdith A.S.； Mitchell R.N.； Palmer M.R..(2022).Transient mobilization of subcrustal carbon coincident with Palaeocene–Eocene Thermal Maximum.Nature Geoscience,15(7). |
| MLA | Gernon T.M.； Barr R.； Fitton J.G.； Hincks T.K.； Keir D.； Longman J.； Merdith A.S.； Mitchell R.N.； Palmer M.R.."Transient mobilization of subcrustal carbon coincident with Palaeocene–Eocene Thermal Maximum".Nature Geoscience 15.7(2022). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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