Zoning and resorption of plagioclase in a layered gabbro, as a petrographic indicator of magmatic differentiation

The Murotomisaki Gabbroic Intrusion is a sill-like layered gabbro emplaced in sedimentary strata of Tertiary age in southwest Japan. The zoning (including resorption structures) and the compositional variations of plagioclase from throughout the intrusion were studied, and it was found that the zoni...

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