Melting the lithosphere: Metasomes as a source for mantle-derived magmas

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• 作者：Tyrone O. Rooney^a ; ^{rooneyt@msu.edu} ; Wendy R. Nelson^b ; Dereje Ayalew^c ; Barry Hanan^d ; Gezahegn Yirgu^c ; John Kappelman^e ; ^f
• 关键词：rift ; alkaline ; metasome ; amphibolite ; lava ; Ethiopia
• 刊名：Earth and Planetary Science Letters
• 出版年：2017
• 出版时间：1 March 2017
• 年：2017
• 卷：461
• 期：Complete
• 页码：105-118
• 全文大小：6291 K
• 卷排序：461

文摘

High- and low-Ti lava types found in a ∼24 Ma shield volcano on the Ethiopian Plateau. Low-Ti lavas are derived from a source similar to those in the Ethiopian rift. High-Ti lavas are melts of an amphibole-rich lithospheric metasome. Thermobaric destabilization of mantle metasomes may facilitate lithospheric thinning.