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Crystallization and differentiation in abyssal tholeiites and gabbros from mid-oceanic ridges

1970; Elsevier BV; Volume: 7; Issue: 4 Linguagem: Inglês

10.1016/0012-821x(69)90050-8

1385-013X

Akiho Miyashiro, Fumiko Shido, Maurice Ewing,

Paleontology and Stratigraphy of Fossils

Tholeiitic gabbros from the Mid-Atlantic Ridge near 24°N were found to show remarkable differentiation, producing high-iron, high-titanium gabbros and aplite in later stages. Crystallization of olivine and plagioclase from abyssal tholeiite magma approximately follows cotectic relation in the system olivine-plagioclase-pyroxene.