Suishoyama pegmatite (Suishouyama; Suisyoyama; Suishyoyama), Iizaka Village (Iisaka), Kawamata, Fukushima Prefecture, Tohoku Region, Honshu Island, Japan
|Latitude & Longitude (WGS84):||37° 40' North , 140° 37' East|
|Latitude & Longitude (decimal):||37.66667,140.61667|
|Köppen climate type:||Cfa : Humid subtropical climate|
A pegmatite shaped like a vertical pipe of 60m diameter. Worked for its major components (perthitic feldspar and quartz) for the ceramic industry. Unusually rich in yttrium-bearing minerals.
The largest pegmatite body in an area rich in other pegmatites.
Mining started in 1916 and closed in the early 1980s.
According to Hori et al. (2006) Iizaka (Iisaka) Village is the old locality name; the pegmatite is near Kawamata town.
35 valid minerals. 2 (TL) - type locality of valid minerals.
Rock Types Recorded
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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
66 - 252.17 Ma
|Mesozoic plutonic rocks|
Age: Mesozoic (66 - 252.17 Ma)
Comments: Deep-seated to high-level intrusions are included. Many charnockites, anorthosites, and large ophiolites, classified as plutons, are distinguished in the database using the SIGNIF item. Ophiolites were classified as plutons, even where remnants may be extrusive and/or sedimentary.
Lithology: Plutonic rocks
Reference: Geological Survey of Canada. Generalized geological map of the world and linked databases. doi:10.4095/195142. Open File 2915d.