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Hidaka Metamorphic Rocks
- Low P/T metamorphic rocks (0.7 GPa, 870 degrees Celsius)
- II zone (250 - 380 MPa, 400 - 550 degrees Celsius)
- III zone (400 - 550 MPa, 510 - 650 degrees Celsius)
- IV zone (630 - 720 MPa, 720 - 870 degrees Celsius)
- Protolith: Nakanokawa Group
- Metamorphism (Upper): Eocene - Oligocene (40 - 30 Ma, K-Ar; 39.6 Ma, U-Pb; 55 Ma, Rb-Sr)
- Metamorphism (Lower): Miocene (19 Ma, U-Pb)
- Metamorphic facies: Section of crust shallower than 23 km
- Metamorphic facies (I zone = Upper): Prehnite-Pumpellyite facies, lower Greenschist facies
- Metamorphic facies (II zone = Upper): upper Greenschist facies
- Metamorphic facies (III zone = Lower): Amphibolite facies
- Metamorphic facies (IV zone = Lower): Granulite facies
- Metamorphic facies (I zone, Pelitic): Phengite + Chlorite
- Metamorphic facies (II zone, Pelitic): Muscovite + Biotite +/- Andalusite
- Metamorphic facies (II zone, Mafic): Hornblende + Epidote +/- Biotite
- Metamorphic facies (III zone, Pelitic): Garnet + Sillimanite + K-feldspar
- Metamorphic facies (III zone, Mafic): Hornblende +/- Garnet +/- Cummingtonite
- Metamorphic facies (IV zone, Pelitic): Garnet + Cordierite/Orthopyroxene
- Metamorphic facies (IV zone, Mafic): Hornblende + Orthopyroxene +/- Clinopyroxene
- Lithofacies: Hornfels, Biotite schist, Biotite gneiss, Biotite-muscovite gneiss, Biotite-hornblende gneiss, Hornblende amphibolite, Granulite
- Lithofacies (Protolith, Upper): Psammitic - pelitic rocks
- Lithofacies (Protolith, Lower): Mafic rocks
- Hidaka Metamorphic Rocks
- [ Upper ]
- ?--?--?--?--?-
- I zone
- --------------
- II zone
- --------------
- III zone
- --------------
- IV zone
- --------------
- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Satsunai river, Tokachi, Hokkaido; Niikappu river, Hidaka, Hokkaido; Shoya, Erimo city, Horoizumi county, Hokkaido; Menashunbetsu river, Urakawa city, Urakawa county, Hokkaido
- Nanayama et al. (2019) Jour. Geol. Soc. Japan, vol.125, no.6, pp.421-438 DOI
- Takahashi et al. (2018) Jour. Geol. Soc. Japan, vol.124, no.6, pp.399-411 DOI
- Kojima and Shimura (2014) Jour. Geol. Soc. Japan, vol.120, no.11, pp.393-412 DOI
- Maeda et al. (2011) Jour. Geol. Soc. Japan, vol.117, no.4, pp.204-216 DOI
- Osanai et al. (2007) Jour. Geol. Soc. Japan, vol.113, Supplement, pp.29-50 DOI