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Deglaciation and glacial erosion: a joint control on magma productivity by continental unloading

Champagnac, Jean-Daniel
Published in Geophysical research letters. 2016, vol. 43, no. 4, p. 1632-1641
Abstract Glacial-interglacial cycles affect the processes through which water and rocks are redistributed across the Earth's surface, thereby linking the solid Earth and climate dynamics. Regional and global scale studies suggest that continental lithospheric unloading due to ice melting during the transition to interglacials leads to increased continental magmatic, volcanic and degassing activity. Such a climatic forcing on the melting of the Earth's interior, however, has always been evaluated regardless of continental unloading by glacial erosion, albeit the density of rock exceeds that of ice by approximately three times. Here, we present and discuss numerical results involving synthetic but realistic topographies, ice caps and glacial erosion rates suggesting that erosion may be as important as deglaciation in affecting continental unloading. Our study represents an additional step towards a more general understanding of the links between a changing climate, glacial processes and the melting of the solid Earth.
Keywords DeglaciationErosionMagmatism
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Article (Accepted version) (943 Kb) - document accessible for UNIGE members only Limited access to UNIGE
Research group Petrology and Volcanology
Swiss National Science Foundation: 200021_150204
Swiss National Science Foundation: 200021_162503
(ISO format)
STERNAI, Pietro et al. Deglaciation and glacial erosion: a joint control on magma productivity by continental unloading. In: Geophysical research letters, 2016, vol. 43, n° 4, p. 1632-1641. doi: 10.1002/2015GL067285 https://archive-ouverte.unige.ch/unige:80151

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Deposited on : 2016-02-01

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