气候变化领域集成服务门户(CCPortal): Carbon concentration increases with depth of melting in Earth’s upper mantle

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DOI	10.1038/s41561-021-00797-y
	Carbon concentration increases with depth of melting in Earth’s upper mantle
	Aiuppa A.; Casetta F.; Coltorti M.; Stagno V.; Tamburello G.
发表日期	2021
ISSN	17520894
英文摘要	Carbon in the upper mantle controls incipient melting of carbonated peridotite and so acts as a critical driver of plate tectonics. The carbon-rich melts that form control the rate of volatile outflux from the Earth’s interior, contributing to climate evolution over geological times. However, attempts to constrain the carbon concentrations of the mantle source beneath oceanic islands and continental rifts is complicated by pre-eruptive volatile loss from magmas. Here, we compile literature data on magmatic gases, as a surface expression of the pre-eruptive volatile loss, from 12 oceanic island and continental rift volcanoes. We find that the levels of carbon enrichment in magmatic gases correlate with the trace element signatures of the corresponding volcanic rocks, implying a mantle source control. We use this global association to estimate that the mean carbon concentration in the upper mantle, down to 200 km depth, is approximately 350 ppm (range 117–669 ppm). We interpret carbon mantle heterogeneities to reflect variable extents of mantle metasomatism from carbonated silicate melts. Finally, we find that the extent of carbon enrichment in the upper mantle positively correlates with the depth at which melting starts. Our results imply a major role of carbon in driving melt formation in the upper mantle. © 2021, The Author(s), under exclusive licence to Springer Nature Limited.
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/206853
作者单位	Dipartimento di Scienze della Terra e del Mare, Università di Palermo, Palermo, Italy; Dipartimento di Fisica e Scienze della Terra, Università di Ferrara, Ferrara, Italy; Dipartimento di Scienze della Terra, Università di Roma La Sapienza, Rome, Italy; Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Bologna, Bologna, Italy
推荐引用方式 GB/T 7714	Aiuppa A.,Casetta F.,Coltorti M.,等. Carbon concentration increases with depth of melting in Earth’s upper mantle[J],2021.
APA	Aiuppa A.,Casetta F.,Coltorti M.,Stagno V.,&Tamburello G..(2021).Carbon concentration increases with depth of melting in Earth’s upper mantle.Nature Geoscience.
MLA	Aiuppa A.,et al."Carbon concentration increases with depth of melting in Earth’s upper mantle".Nature Geoscience (2021).