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Ogoya mine, Komatsu City, Ishikawa Prefecture, Chubu Region, Honshu Island, Japan

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Latitude & Longitude (WGS84): 36° 17' 35'' North , 136° 35' 30'' East
Latitude & Longitude (decimal): 36.29306,136.59167
Köppen climate type:Dfb : Warm-summer humid continental climate
Name(s) in local language(s):尾小屋鉱山, 石川県 小松市

A closed mine with Cu-Pb-Zn veins, famous to Japanese collectors for its purplish pyromorphite crusts on amethystine quartz crystals (the color association being presumably just coincidence!). 1958 Cu production 2,644 tons from ore averaging 1.5% Cu.

Historical summary:
- In 1772, Au ore was found in Kanahira area.
- In 1884, Otani vein was found.
- In 1908, owner changed. New outcrop was found in Shirayama Area.
- In 1932, owned by Nippon Mining Industry Co., Ltd.
- In 1962, mining company was separated to Hokuriku Mine Co., Ltd.
- In 1971, closed.

Now, Hokuriku Mine Co., Ltd. is remain as environmental conservation company for prevention of water pollution from slag heaps.

Mineral List

35 valid minerals.

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on

Pliocene - Miocene
2.588 - 23.03 Ma

ID: 1378185
Miocene-Pliocene mixed volcanic, volcaniclastic and sedimentary rocks

Age: Neogene (2.588 - 23.03 Ma)

Comments: This designation includes Precambrian iron-formation-bearing sedimentary and volcanic sequences, as well as mixed sedimentary and volcanic or volcaniclastic sequences.

Lithology: Mixed volcanic, volcaniclastic and sedimentary rocks

Reference: Geological Survey of Canada. Generalized geological map of the world and linked databases. doi:10.4095/195142. Open File 2915d. [18]

Data and map coding provided by, used under Creative Commons Attribution 4.0 License

This page contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


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- Kamitani, M., Okumura, K., Teraoka, Y., Miyano, S., and Watanabe, Y. (2007): Mineral Resources Map of East Asia. Geological Survey of Japan.
岸上佳史, 桜山和美, 田崎和江, 上島雅人, & 渡辺弘明. (1999). 尾小屋鉱山における Cu と Fe の微生物による固定. 地球科學, 53(1), 19-28. Bacterial fixation of Cu and Fe in Ogoya Mine, Ishikawa Prefecture. The Association for the Geological Collaboration in Japan (AGCJ)

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