气候变化领域集成服务门户(CCPortal): Transient mobilization of subcrustal carbon coincident with Palaeocene-Eocene Thermal Maximum

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DOI	10.1038/s41561-022-00967-6
	Transient mobilization of subcrustal carbon coincident with Palaeocene-Eocene Thermal Maximum
	Gernon, Thomas M.; Barr, Ryan; Fitton, J. Godfrey; Hincks, Thea K.; Keir, Derek; Longman, Jack; Merdith, Andrew S.; Mitchell, Ross N.; Palmer, Martin R.
发表日期	2022
ISSN	1752-0894
EISSN	1752-0908
起始页码	573
结束页码	+
卷号	15 期号:7 页码:21
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 similar to 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 >10(4) gigatons of subcrustal carbon was mobilized into the ocean and atmosphere sufficiently rapidly to explain the scale and pace of the PETM.
学科领域	Geosciences, Multidisciplinary
语种	英语
WOS研究方向	Geology
WOS记录号	WOS:000814973200001
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/272606
作者单位	NERC National Oceanography Centre; University of Southampton; University of Edinburgh; University of Florence; Carl von Ossietzky Universitat Oldenburg; UDICE-French Research Universities; Universite Claude Bernard Lyon 1; University of Leeds; Chinese Academy of Sciences; Institute of Geology & Geophysics, CAS
推荐引用方式 GB/T 7714	Gernon, Thomas M.,Barr, Ryan,Fitton, J. Godfrey,et al. Transient mobilization of subcrustal carbon coincident with Palaeocene-Eocene Thermal Maximum[J],2022,15(7):21.
APA	Gernon, Thomas M..,Barr, Ryan.,Fitton, J. Godfrey.,Hincks, Thea K..,Keir, Derek.,...&Palmer, Martin R..(2022).Transient mobilization of subcrustal carbon coincident with Palaeocene-Eocene Thermal Maximum.NATURE GEOSCIENCE,15(7),21.
MLA	Gernon, Thomas M.,et al."Transient mobilization of subcrustal carbon coincident with Palaeocene-Eocene Thermal Maximum".NATURE GEOSCIENCE 15.7(2022):21.