Abukuma Cave
Sugaya, Takine village, Tamura city, Fukushima pref., Japan
Occurrence
Stalactite cave formed by deposition of CaCO3 dissolved from limestone in the Takine Group, a member of the accretionary complex. The age of the Takine Group and tectonic relation to other accretionary complexes are not know. The age of limestone is Devonian to Triassic (360-250 Ma). A part of the limestone has been subjected to contact metamorphism by surrounding the Late Cretaceous (90 Ma) Abukuma granitic rocks. The Abukuma granitic rocks are S-type (Ilmenite-series). Ages of sedimentary rocks were determined by foraminifera.
Stalactite deposited on open spaces in limestone of the Takine Group, CaCO3 was dissolved by underwater from limestone, and it deposited as stalactite. Stalactite is mainly composed of aragonite. The hight of photograph is approximately 5 m.
Reported Minerals
- Aragonite
- Calcite
Mineral Assemblages
- Calcite - Aragonite
Localities
- Abukuma Cave
- Gyokusen Cave
- Otake Cave
Related Occurrences
- Stalactite
- Tufa (Calcareous sinter)
- Travertine (Calcareous sinter)