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Takaneyama Mine

Naka, Shimoda city, Shizuoka pref., Japan


Takane Mine, Tsujita Mine


Moderate-T hydrothermal deposit

Moderate temperature hydrothermal deposit in andesitic and basaltic pyroclastic rocks of the early Pliocene (5.0 Ma) Harada Formation of the Shirahama Group. The pyroclastic rocks, the host of the deposit, is calc-alkaline to tholeiitic, and have been subjected to strong prppylitization alteration. The Shirahama Group unconformably overlies the late Miocene (7.5 Ma) Yugashima Group. Ages of volcanic rocks were determined by K-Ar radiometric dating and fission track dating of zircon.

Reported Minerals

Mineral Assemblages

  • Quartz(Gangue) - Ranciéite - Todorokite - Birnessite


  • 1918: Began to mine gold.
  • 1924: The mine was closed.
  • 1943: Began to mine manganese.
  • 1944: The mine was closed.
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