Taishu mine, Azu, Tsushima-Shimoshima island, Tsushima Islands, Nagasaki Prefecture, Kyushu Region, Japan
|Latitude & Longitude (WGS84):||34° 13' 14'' North , 129° 13' 9'' East|
|Latitude & Longitude (decimal):||34.22083,129.21944|
|Köppen climate type:||Cfa : Humid subtropical climate|
Originally mined for silver - Japan's first recorded silver production was from here in 699 A.D. Later a Pb-Zn-Ag mine. (1958 production = 13.0 tons Ag.) Hydrothermal veins in fissures in highly altered Miocene quartz porphyry, and disseminated in surrounding country rock. Metal mining has now ceased, but the surrounding altered country rock is mined for high-quality clay for porcelain and refractories. (The "kaolin" here is actually halloysite.) Remaining sulphides are detrimental to the clay ore and must be removed.
13 valid minerals.
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 Macrostrat.org
23.03 - 66 Ma
|Paleogene sedimentary rocks|