Do carbonatites and alkaline rocks reflect variable redox conditions in their upper mantle source

Simon Braunger,Michael A.W. Marks,Thomas Wenzel,Luanna Chmyz,Rogério Guitarrari Azzone,Gregor Markl

Earth and Planetary Science Letters（2020）

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摘要

•Carbonatites and associated alkaline rocks crystallize from rather oxidized magmas.•Continental alkaline complexes without carbonatites reveal rather reduced conditions.•Relatively oxidized mantle is a major prerequisite for generation of carbonatites.

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关键词

carbonatites,alkaline silicate rocks,redox conditions,oxygen fugacity,mantle

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