Petrology of peridotite and garnet clinopyroxenite of the Mt. Higasi-Akaisi mass,central Sikoku,Japan — Subsolidus relation of anhydrous phases |
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| Authors: | Takeshi Mori Shohei Banno |
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| Institution: | (1) Department of Earth Sciences, Kanazawa University, Kanazawa, 920 Ishikawa, Japan |
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| Abstract: | The mineralogy of anhydrous minerals of peridotite and garnet clinopyroxenite of the Mt. Higasi-Akaisi peridotite mass, Japan, is described. The subsolidus equilibria among garnet, clinopyroxene, orthopyroxene and olivine are discussed in terms of composition range of solid solutions and of Fe-Mg partition. It is concluded that the anydrous minerals of this mass equilibrated at lower temperatures than any of well studied peridotite-garnet clinopyroxenite association. The tentative estimation gives 5–600° C and 7–13 Kb as the physical conditions of equilibration. Comparison with similar associations from other occurrences and geological implications are briefly discussed. |
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