Unnamed pegmatite, Obok-tong, Haksong-gun, North Hamgyong Province, North Korea
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Granite, pegmatite and aplite intruding mica-gneiss, amphibolite and magnesite of the Matenrei system. Investigated during WW2 for potential lithium production from its zinnwaldite. Reserves = 488 tons zinnwaldite.
Harada, J. and Ishikawa, T. (1944) Report of the 58th Minor Committee for Special Minerals and Ores, Japan Science Promotion Association, no. 5.
2 valid minerals.
Rock Types Recorded
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