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Higo Metamorphic Rocks

• Type locality: Kumamoto prefecture
• Metamorphism: Triassic (260 - 230 Ma, Sm-Nd, SHRIMP, Rb-Sr, CHIME; 120 - 90 Ma, K-Ar, Rb-Sr)

• Metamorphic facies (B zone, C zone): Greenschist facies - Amphibolite facies
• Metamorphic facies (D zone, E zone): Amphibolite facies - Granulite facies (800 - 870 °C, 700 MPa)
• Lithofacies (Main): Biotite-muscovite gneiss, Biotite gneiss, Garnet-biotite gneiss, Garnet-cordierite-biotite gneiss, Garnet-orthopyroxene gneiss
• Lithofacies (Minor): Amphibolite, Garnet amphibolite, Orthopyroxene-hornblende granulite, Two pyroxene-hornblende granulite, Hornblende-biotite gneiss, Garnet-clinopyroxene marble, Wollastonite-bearing marble
• Lithofacies (Protolith): Sandstone, Mudstone

• Upper limit: Thrust fault
• Lower limit: Thrust fault

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: Tabira?, Ogawa village, Uki city, Kumamoto pref.; Uchida, Matsubase village, Uki city, Kumamoto pref.

• Osanai et al. (2014) Jour. Geol. Soc. Japan, vol.120, Supplement, pp.79-100 DOI