Takemori
Enzan-Takemori, Koshu city, Yamanashi pref., Japan
"No Trespassing" sign was erected
Occurrence
Alpine fissure in hornfels, shale of the Shimanto accretionary complex subjected to Albite-Epidote-hornfels facies metamorphism by the late Miocene (10 Ma) Tokuwa Granite. Granite at this locality is the S-type (Ilmenite-series) margin of the I-type (Magnetite-series) Tokuwa Granite. The S-type (Ilmenite-series) margin was formed by reduction reation of granite magma with surrounding pelitic rocks. The shale of this locality is that of the Shimanto accretionary complex, probably the middle Eocene (45 Ma) Gongenyama Unit of the Sagamiko Group. Approximately 1 km apart from the Tokuwa Granite, the heat source. Ages of sedimentary rocks were determined by radiolarians, and granite age by K-Ar radiometric dating of biotite and whole rock.
Reported Minerals
Mineral Assemblages
- Quartz - Anatase - Brookite - Rutile
- Quartz - Muscovite - Dravite
- Quartz - Sulphur
Locality
- Takatori Mine (Ferberite)
- Ebisu Mine (Wolframite)
- Togane Mine (Wolframite)
- Komaki Mine (Wolframite)
- Itaga Mine (Andalusite)
- Otani Mine (Cassiterite, Scheelite)
- Taisho Mine (Cassiterite)
- Ichiyanagi Mine (Löllingite)
- Takane Mine (Bismuth)
- Karasawa Mine (Bismuth)
- Takemori (Dravite)