Further occurrence of brown ores in Kuroko-type deposits in Japan

Akira Imai; Osamu Ishizuka; Ryoichi Yamada; Hiroshi Miyamoto

doi:10.1111/j.1751-3928.2001.tb00098.x

Further occurrence of brown ores in Kuroko-type deposits in Japan

Akira Imai, Osamu Ishizuka, Ryoichi Yamada, Hiroshi Miyamoto

Earth Science and Technology

Research output: Contribution to journal › Article

4 Citations (Scopus)

Abstract

The occurrence of so-called brown ore from the Kuroko-type deposits in Japan was examined. Brown ore specimens from the Kannondo, Inarizawa, Matsumine, Fukazawa, Uchinotai, Kosaka (orebody unknown) and Nurukawa deposits have been found in the ore collection stored by Dowa Mining Co. Ltd. and the subsidiary companies. In addition, occurrences from the Fukazawa, Matsumine, Ezuri, Shakanai, and Ginzan deposits were previously reported. The brown ore is characterized by its color and by its higher Ag concentration (up to around 2,400 g/t) than ordinary black ores. This type of ore occurs commonly in the Kuroko-type deposits in Japan, whereas its extent is limited. The brown ore is a type of Au-rich massive sulfide ore formed in submarine hydrothermal system.

Original language	English
Pages (from-to)	263-268
Number of pages	6
Journal	Resource Geology
Volume	51
Issue number	3
DOIs	https://doi.org/10.1111/j.1751-3928.2001.tb00098.x
Publication status	Published - Sep 1 2001

All Science Journal Classification (ASJC) codes

Geology
Geochemistry and Petrology

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Imai, A., Ishizuka, O., Yamada, R., & Miyamoto, H. (2001). Further occurrence of brown ores in Kuroko-type deposits in Japan. Resource Geology, 51(3), 263-268. https://doi.org/10.1111/j.1751-3928.2001.tb00098.x

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abstract = "The occurrence of so-called brown ore from the Kuroko-type deposits in Japan was examined. Brown ore specimens from the Kannondo, Inarizawa, Matsumine, Fukazawa, Uchinotai, Kosaka (orebody unknown) and Nurukawa deposits have been found in the ore collection stored by Dowa Mining Co. Ltd. and the subsidiary companies. In addition, occurrences from the Fukazawa, Matsumine, Ezuri, Shakanai, and Ginzan deposits were previously reported. The brown ore is characterized by its color and by its higher Ag concentration (up to around 2,400 g/t) than ordinary black ores. This type of ore occurs commonly in the Kuroko-type deposits in Japan, whereas its extent is limited. The brown ore is a type of Au-rich massive sulfide ore formed in submarine hydrothermal system.",

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