气候变化领域集成服务门户(CCPortal): Archaean seafloors shallowed with age due to radiogenic heating in the mantle

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DOI	10.1038/s41561-020-00673-1
	Archaean seafloors shallowed with age due to radiogenic heating in the mantle
	Rosas J.C.; Korenaga J.
发表日期	2021
ISSN	17520894
起始页码	51
结束页码	56
卷号	14 期号:1
英文摘要	Given the scarcity of geological data, knowledge of Earth’s landscape during the Archaean eon is limited. Although the continental crust may have been as massive as present by 4 Gyr ago, the extent to which it was submerged or exposed is unclear. One key component in understanding the amount of exposed landmasses in the early Earth is the evolution of the oceanic lithosphere. Whereas the present-day oceanic lithosphere subsides as it ages, based on numerical models of mantle convection we find that higher internal heating due to a larger concentration of radioactive isotopes in the Archaean mantle halted subsidence, possibly inducing seafloor shallowing before 2.5 Gyr ago. In such a scenario, exposed landmasses in the form of volcanic islands and resurfaced seamounts or oceanic plateaus can remain subaerial for extended periods of time, and may have provided the only stable patches of dryland in the Archaean. Our results therefore permit a re-evaluation of possible locations for the origin of life, as they provide support to an existing hypothesis that suggests that life had its origins on land rather than in an oceanic environment. © 2021, The Author(s), under exclusive licence to Springer Nature Limited.
英文关键词	age determination; Archean; concentration (composition); continental crust; early Earth; heating; mantle; mantle convection; oceanic lithosphere; radionuclide; seafloor; seamount; volcanic island; Trachinotus falcatus
语种	英语
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/206953
作者单位	Department of Earth and Planetary Sciences, Yale University, New Haven, CT, United States; Departamento de Geofísica Aplicada, Centro de Investigación Científica y de Educación Superior de Ensenada, Ensenada, Mexico
推荐引用方式 GB/T 7714	Rosas J.C.,Korenaga J.. Archaean seafloors shallowed with age due to radiogenic heating in the mantle[J],2021,14(1).
APA	Rosas J.C.,&Korenaga J..(2021).Archaean seafloors shallowed with age due to radiogenic heating in the mantle.Nature Geoscience,14(1).
MLA	Rosas J.C.,et al."Archaean seafloors shallowed with age due to radiogenic heating in the mantle".Nature Geoscience 14.1(2021).