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Occurrence and Reserve Evaluation of the Poongwon Quartzite Deposit in Geochang, Kyongsangnam Province  

Yang Kyounghee (Division of Earth Environmental System, College of Natural Science, Pusan National University)
Yun Sung-Hyo (Department of Earth Sciences, College of Education, Pusan National University)
Publication Information
Economic and Environmental Geology / v.39, no.1, 2006 , pp. 1-7 More about this Journal
Abstract
This paper attempts to locate and define a quartzite deposit in Geochang, Kyongsangnam Province in order to establish its commercial viability. The quartzite deposit (Poongwon Mine) occurs as lens or boudinage at the contact between mica schist of the Deogyusan formation and granite gneiss. During Precambrian, regional metamorphism and granitization may have caused the formation ot quartzite layers through recrystallization and rearrangement of silica components derived from older sedimentary rocks, probably chert and/or sandstone. The deposit is composed of fine-grained milky, or light yellowish quartz showing weak laminations with fairly dense and rough appearance in outcrop. It reaches about $60\;m(height)\times140\;m(length)\times35m(width)$ with attitude of $N57^{\circ}E-N8^{\circ}4E\;and\;51^{\circ}-60^{\circ}NW$. The average grade of the quartzite samples is $SiO_2=94.4\;wt\%,\;A1_2O_3=3.3\;wt\%,\; Fe_2O_3=0.8\;wt\%,\;K_2O=0.7\;wt\%$, which can be used for foundry, constructional materials, or concrete making. The proved reserve was estimated as 200,811 tonnage.
Keywords
quartzite; Geochang; lens or boudinage; average grade; the proved reserve;
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