A Study on the Original Rock and Trace Elements of the Metamorphic Rocks in Buyeo-Cheongyang, Chungnam

충남(忠南) 부여(扶餘)-청양일대(淸陽一帶)에 분포(分布)하는 변성암류(變成岩類)의 미량성분(微量成分)과 기원암(起源岩)에 관(關)한 연구(硏究)

The Buyeo-Cheongyang area, in the south-western area of Gyeonggi massif, comprises Precambrian and Mesozoic metamorphic and sedimentary rocks. The original rock of metamorphic rocks was studied by geochemical examination and statistical analyses of the trace elements in the gneisses, schists, shale and granitic rocks. Average abundance of Cu,Cr,Pb,Ni,Co,Mn,Li and Zn elements from gneisses have similar to those from shale and schists. However the gneisses have higher Cr,Ni,Co,Mn,Li abundance than those from the granite. Abundance range and frequency distribution of the trace elements in the gneiss show a marked trend sedimentary origin, that is, standard deviation have far the higer than that of igneous origin. Also it is wide dispersion and irregularly distribution. For that reason, this gneiss is regard as sedimentary original rocks with schists.