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 |
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Pages (from-to) | 263-268 |
Number of pages | 6 |
Journal | Resource Geology |
Volume | 51 |
Issue number | 3 |
DOIs | |
Publication status | Published - Sep 1 2001 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Geology
- Geochemistry and Petrology