Sobolev, A. V., Asafov, E. V., Gurenko, A. A., Arndt, N. T., Batanova, V. G., Portnyagin, Maxim , Garbe-Schönberg, Dieter and Krasheninnikov, S. P. (2016) Evidence for Archean hydrous deep-mantle reservoir provided by Abitibi komatiites. [Talk] In: Goldschmidt Conference 2016. , 26.06-01.07.2016, Yokohama, Japan .

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Abstract

Archean komatiites result from melting under extreme conditions of the Earth’s mantle. Their chemical compositions evoke very high eruption temperatures, up to 1600°C, providing clues to still higher temperatures in their mantle source [1]. This message is clouded, however, by uncertainty about the water content in komatiite magmas. One school holds that komatiites were essentially dry and originated in mantle plumes [2] while the other argues that these magmas contained several percent of water, which drastically reduced their eruption temperature and links them to subduction processes [3].

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