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Petrology of Rhyolitic Tuffites Around Wolseong Area, Southeast Korea  

박준범 (미육군극동공병단 지반환경공학부)
전은영 (미육군극동공병단 지반환경공학부)
박성현 (미육군극동공병단 지반환경공학부)
최성자 (한국지질자원연구원 지질도지구조실)
Publication Information
Economic and Environmental Geology / v.37, no.3, 2004 , pp. 347-354 More about this Journal
Abstract
We report the petrographic and petrochemical results on the rocks which have been classified as hornfelsic sandstones or mudstones of the Gyeongsang Group in Wolseong Area, part of Choyang Geologic Sheet (Tateiwa, 1924) and discuss its origin. The rocks consist of alternating layers with dark. fine-grained and bright, coarse-grained but don't have any clues of thermal alteration such as hornfels. The rocks are composed of quartz, feldspar and rock fragments of volcanic origin. The overall geochemical characteristics of the rocks indicate that the rocks have mainly rhyolitic composition with 64.5-72 wt% SiO$_2$ and are similar to the trend of Cretaceous and Tertiary volcanic rocks around this area. On the contrary, the geochemical characteristics of rocks are distinguished from those of Lower Cretaceous Sindong and Mayans mudrocks in the Gyeongsang Basin. We re-name the rocks as rhyolitic tuffite.
Keywords
petrographic and petrochemical results; hornfelsic Gyeongsang Group; volcanic origin; tuffite;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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