Mine detail: Kosaka Zn - Cu - Pb - Ag - Au - Pyr Mines

Previously called 'Uchinotai Mine and Others'

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Location

Lat / long:

40.32847, 140.74832

Resource(M)

Primary:	Copper, Zinc, Lead
Secondary:	Gold, Sulfur-Pyrite, Silver
Ore:	Argentite, Barite, Bornite, Chalcocite, Chalcopyrite, Galena, Gold, Sphalerite
Gangue:	Gypsum, Quartz
Orebody form:	TABULAR
Discovery year:	1861

Production

Operation type:	Unknown
Production size:	Medium
Development status:	Producer
First production started:	1884

Geology

Host type:	Volcanic Breccia (Agglomerate),Rhyolite
Associated rock:	Uwamuki Formation Tuff Breccia (Nishikurosawa Formation);Other Green Tuff Horizons
Associated type:	Volcanic Breccia (Agglomerate),Rhyolite
Structure:	Hokuroku Basin, Hanawa Fault, Ashinazawa Fault

References

MRDS	W018909
DEP	10073094
Reference	{Deposit:: OSHIMA, T., ET AL, 1974, GEOLOGY OF THE KOSAKA MINE, AKITA PREFECTURE; JAP. SOC. MINING GEOL., MINING GEOL. SPECIAL ISSUE NO. 6 P. 89 - 100}{Deposit:: LAMBERT, I. B., SATO, T., 1974, THE KUROKO AND ASSOCIATED ORE DEPOSITS OF JAPAN: A REVIEW OF THEIR FEATURES AND METALLOGENESIS; ECON. GEOL. V 69 P. 1215 - 1236}{Production:: SKINNERS MINING INTL. YBK. 1975, P. 213. OSHIMA T. ET AL, 1974, JAP. SOC. MINING GEOL. NO. 6 P. 94}{Reserve-Resource:: OSHIMA, T. ET AL., 1974, JAP. SOC. MINING GEOL. NO. 6 P. 94. LAMBERT, I. B., SATO, T., 1974, ECON. GEOL. V. 69 P. 1216}
Reporter	Schruben, Paul G.