삼성광산 일대의 견운모광화작용에 대한 광물학적 및 성인적 연구 = Mineralogy and Genesis of the Sericite Ore from the Samsung Mine Area

다국어 초록 (Multilingual Abstract)

The Samsung mine is located in Jeongsan-myeon, Cheongyang-gun, Chungcheongnam-do, and is produces sericiteores. The purpose of this study is to investigate the geology and mineralogy of sericite ore and its host-rock together with thealteration processes and age of sericitization. Geological survey, polarizing microscopy, X-ray powder diffraction, electronmicroprobe analysis, X-ray fluorescent analysis, diferential thermal analysis, and K/Ar isotope study have been employed forthis study. The mine area is composed of Precambrian granite-gneiss and mica schist, and also Jurassic biotite granite.Sericitization has occured within the granite-gneiss, and is interpreted to be formed by hydrothermal alteration. The sericitewas formed by the breakdown of orthoclase, plagioclase, and biotite, respectively. With sericitization intensity increase, SiO2,and Na2 2O3, and K2O increased. The formation age of sericite has been determined to beJurassic, which corresponds well to the intrusion age of the biotite granite nearby Samsung mine, sericite, sericitization, hydrothermal alteration

국문 초록 (Abstract)

충남청양군정산면에위치한삼성광산은견운모를생산하고있는광산으로서, 이광산및주변지역에서산출되는견운모에대해지질학적및광물학적연구를실시하였다. 이연구를위해야외지질조사및편광현미경관찰, X선회절분석, 전자현미분석, X선형광분석, 시차열분석, K/Ar 동위원소분석등의실내연구를실시하였다. 삼성광산지역은선캠브리아기의화강편마암이넓게분포하고있으며, 같은시기의운모편암이발달하고있다. 견운모는화강편마암의열수변질작용에의해생성된것으로사료되며, 원암의주요구성광물인정장석→ 사장석→ 흑운모의순서로변질된다. 견운모화
가진행되어감에따라석영의외곽부분에서용해작용에의한만곡현상이심화되다가점차사라진다. 견운모로의변질작용이진행됨에따라모암의화학성분은 SiO2, Na2O 함량은감소하는반면, 2O3, K2O는증가하는양상을나타낸다. 견운모의생성시기는중생대쥬라기이며, 이시기는화강편마암을관입한흑운모화강암의관입시기와잘일치한다.

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