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Kushikino
Japan
Main commodities:
Au
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Deposit Description
The Kushikino gold mine, now a gold park, produced 55 tonnes of gold and 497 tonnes of silver since mining commenced in 1660.
Ore occurs in quartz veins hosted by propylitically altered Miocene to Pliocene andesite with K-Ar aged adularia veining at 4.0 Ma. The NE trending main Kushikino No. 1 vein is 2.6 Km long and dips at 40° S, with a width of between 0.01 to 5.0 m. It has been exploited from the surface to a depth of 450 m. Quartz and calcite are the predominant vein material, together with adularia, interstratified chlorite/smectite or illite/smectite and smectite, accompanied by electrum, naumannite, polybasite and pyrargyrite. A major zone of silicification (quartz with kaolinite and interstratified illite/smectite) is developed immediately to the east of the mine.
Description based on information available at, or was up to date when written in 1999.
This description is a summary from published sources, the chief of which are listed below.
© Copyright Porter GeoConsultancy Pty Ltd. Unauthorised copying, reproduction, storage or dissemination prohibited.
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| References to this deposit in the PGC Literature Service Collection: |  |
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Izawa E, Taguchi S, Kobayashi T, Watanabe K 1992 - Gold Mineralization in Volcano-Geothermal Areas of Kyushu: in Urabe T, Aoki M (Eds.), Mineral Deposits of Japan and the Philippines 29th IGC Field Trip C33 Guide Book, The Society of Resource Geology, Tokyo, Japan v6 pp 143-172
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Matsuhisa Y, Morishita Y, Sato T 1985 - Oxygen and Carbon isotope variations in Gold-bearing hydrothermal veins in the Kushikino mining area, southern Kyushu, Japan: in Econ. Geol. v80 pp 283-293
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Watanabe Y 2005 - Late Cenozoic evolution of epithermal gold metallogenic provinces in Kyushu, Japan: in Mineralium Deposita v40 pp 307-323
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Yukihiro Matsuhisa 1992 - Epithermal gold mineralization in Kyushu, Japan: in Epithermal Gold in Asia and the Pacific, Mineral Concentrations and Hydrocarbon Accumulations in the ESCAP Region UN Econ & Social Comm to Asia & the Pacific v6 pp 23-27
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| PGC Literature Compilations containing papers referring to this deposit: | |
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Pacific Gold '99: Volume 2 - Western Pacific, B
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