자원환경지질 (Economic and Environmental Geology)
- 제11권4호
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- Pages.169-182
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- 1978
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- 1225-7281(pISSN)
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- 2288-7962(eISSN)
월악산화강암(月岳山花崗岩)의 접촉변성(接觸變成)에 관(關)하여
Study on The Contact Metamorphism of Weolagsan Granite
- Lee, Dai Sung (Department of Geology, Yonsei University) ;
- Kang, Jun Nam (Department of Geology, Yonsei University)
- 발행 : 1978.12.31
초록
The Weolagsan area consists of four units; (1) Low grade meta-sediments of the upper members of Ogcheon age unknown group such as Changri (mainly black slate and phyllitic rock), Majeonri (mainly alternation of slate, limestone and chert) and Hwanggangri Formation (pebble bearing phyllitic sediments); (2) Samtaesan Formation of Chosun System of Ordovician; (3) So called meta-volcanics and (4) Weolagsan Granite and its associations which intruded above mentioned meta-sediments and meta-volcanics. This study was focused to know the Woelagsan granite and its metasomatic effects to the country rocks petrographically and petrochemically. According to the field survey, microscopic work and some chemical analysis, the granite is a "normal granite" based on the Streckeisen's classification and belongs to a mass of the Central-zone younger group in Ogcheon geosynclinal belt. The granite metasomatized the country rocks along its northern contact zone. Zone of calcareous and cherty rocks (Majeonri formation) was silicified partly and skarned locally at the contact with the granite. The chemical analysis of the zone show no difinite variations in contents of
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