TrekGEO > Mineral Trail > Tokai region > Shizuoka pref. > Cape Osaki

Japanese page

Cape Osaki

Usami, Ito city, Shizuoka pref., Japan


Hot spring deposit

Hydrothermal veins associated with basalt lava of the Late Pleistocene (0.9 - 0.4 Ma) Usami volcano. The basalt lava covers Andesite.


Outcrop of basalt associated with low temperature hydrothermal veins. The grayish white host is basalt including white phenocrysts of anorthite. The black vein with a red tint is the hydrothermal vein formed in joints of basalt, and is mainly composed of .Ranciéite.

Reported Minerals

  • Ranciéite
  • Anorthite

Mineral Assemblages

  • Hydrothermal vein - Ranciéite
  • Basalt (Host) - Anorthite
Copyright (c) 2020 NariNari, All Rights Reserved.