강원도 고성지역에 분포하는 알칼리 현무암질 마그마의 상승경로

국문 초록 (Abstract)

강원도 고성지역에는 여러 종류의 포획암과 포획결정을 내포한 마이오세 현무암들이 화산전(volcanic plug) 형태를 이루며 분포한다. 이들 화산전중에서 운봉산화산전의 근원마그마는 지하 160 ㎞ 깊이에서 형성되어 지표로 올라왔다. 전암화학분석, 구성광물의 평형온도 및 압력은 운봉산화산전을 형성한 화산암이 알칼리현무암이며, 결핍된 석류석 페리도타이트의 0.2-2%의 부분용융에 의하여 형성되었음을 지시한다. 이 마그마는 감람석, 단사휘석, 사장석을 각각 75-110 ㎞ 40-52 ㎞ 37-54 ㎞ 깊이에서 정출하였으며, 맨틀포획암인 스피넬 페리도타이트를 지하 57-67 ㎞에서 포획하여 지표에 빠른 속도로 올라왔다.

다국어 초록 (Multilingual Abstract)

Miocene basalt plugs in Goseong contain a large variety of crustal and mantle xenoliths and xenocrysts. One of basalt plugs, Unbongsan, are derived from 160 ㎞ depth. Whole-rock geochemistry and pressure and temperature conditions of mineral phases indicate that Unbongsan volcanic rocks are alkali basalts and the source magma of the alkali basalts was generated from about 0.2-2% partial melting of depleted garnet peridotite. Crystallization pressures and temperatures of mineral phases within ascending magma of Unbongsan alkali basalt indicate that olivines, clinopyroxenes, and plagioclases were crystallized at 75-110 ㎞, 40-52 ㎞, 37-54 ㎞ depth, respectively. The ascending magma of Unbongsan alkali basalts enclosed mantle xenoliths at about 57-67 ㎞ depth.

목차 (Table of Contents)

• 요약
• Abstract
• 서론
• 지질 및 암석기재
• 분석방법
• 편형온도 및 압력
• 결론 및 토의
• 사사
• 참고문헌

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