Meimechit

Meimechit is an ultra- basic rock of volcanic origin, which consists of olivine injections in a fine-grained matrix. The matrix also contains olivine, as well as serpentine , phlogopite , perovskite and rock glass . With regard to its mineralogical and chemical composition, the rock belongs to the group of picrites and is related to kimberlites . Because of its high MgO content of more than 18%, Meimechit is classified as one of the High-Mg volcanic rocks . The earth's mantle below the continental crust is assumed to be the origin of the melt .

Meimechite were named after the Meimecha River in northern Siberia, where these rocks occur within the Siberian trap .

Web links

• Meimechit in the Mineral Atlas

literature

• MJ Le Bas: IUGS Reclassification of the High-Mg and Picritic Volcanic Rocks. Journal of Petrology 41 (10), 2000, pp. 1467-1470
• AV Sobolev, SV Sobolev, DV Kuzmin, KN Malitch, AG Petrunin: Siberian meimechites: origin and relation to flood basalts and kimberlites. Russian Geology and Geophysics 50, 2009, pp. 999-1033
• Wolfhard Wimmenauer : Petrography of igneous and metamorphic rocks. Enke, Stuttgart 1985, p. 151. ISBN 3-432-94671-6