出典:Wiktionary
出典:『Wiktionary』 (2025/06/26 13:12 UTC 版)
majorite (plural majorites)
出典:Wikipedia
出典:『Wikipedia』 (2010/12/03 11:53 UTC 版)
Majorite is a type of mineral found in the upper mantle of the Earth. Its chemical formula is Mg3(Fe, Al,Si)2(SiO4)3. Majorite was first described from the Coorara Meteorite of Western Australia and has been reported from various other meteorites. Mantle derived xenoliths containing majorite have been reported from potassic ultramafic magmas on Malaita Island on the Ontong Java Plateau Southwest Pacific.