Economic and Environmental Geology (자원환경지질)
- Volume 22 Issue 2
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- Pages.151-166
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- 1989
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- 1225-7281(pISSN)
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- 2288-7962(eISSN)
Allanite Mineralization in the Mt. Eorae Area
어래산지역(御來山地域)의 갈렴석광상(褐簾石鑛床)
Abstract
A study of rare-earth mineralization in Kyemyungsan metasedimentary formation of Precambrian Ogcheon Group was carried out in the Mt. Eore Area near Choongju City based on the thorium (Th) and uranium (U) count data of geophysical airborne survey. This rare-earth mineralization was found in the magnetite-bearing banded quartizite which contains diagnostically some amounts of the metamict allanite. The brown colored allanites are distributed as aggregates of fine grains and sometimes banded structures with magnetite (inter growth) along the banding. The ore bed is displaced by the small faults and granite intrusions, and separated 5 ore blocks. The dimensions of the outcrop are 50-80 m in width, 1,500 m in length with the strike of
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