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NTIS 바로가기암석학회지 = The journal of the petrological society of korea, v.25 no.4, 2016년, pp.349 - 360
황상구 (안동대학교 지구환경과학과) , 서승환 (안동대학교 지구환경과학과)
The Bunam Stock (
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핵심어 | 질문 | 논문에서 추출한 답변 |
---|---|---|
고기 마그마챔버는 어디서 발견하기 쉬운가? | 고기 마그마챔버는 마그마활동과 조합된 고기 조산대의 침식부에서 자주 나타나지만, 동심원상 혹은 층 상의 일관된 누대 형상을 나타내는 것이 종종 발견된다. 이러한 누대분포가 발견되더라도 그 성인은 대부분 마그마 분화작용으로 증명되는 것이 일반적이다(예, Hwang and Lee, 2002). | |
부남암주란? | 부남암주(면적 $29.5km^2$)는 조립질 화강암, 석영몬조섬록암, 화강섬록암과 세립질 화강암 등의 4개 암상으로 분류되는 심성암 복합체이다. 세립질 화강암을 제외한 3개 암상은 석영몬조섬록암을 중심으로 화강섬록암과 조립질 화강암 순으로 동심원상 누대분포를 나타내며, 암상 간에는 매우 불규칙한 경계를 가지고 점이적 조성변화를 나타낸다. | |
동심원상 혹은 층 상의 일관된 누대 형상이 지질학 문헌의 기록은 어떠한가? | 또한 층상의 누대 형상은 암상 변화가 단순한 분화작용뿐만 아니라 지속적인 마그마 주입과 이에 따른 마그마 혼합과정으로 언급한 것도 종종 있다(예, Kim and Jwa, 2005). 그러나 마그마챔버에서 일관된 동심원상 누대 형상이 혼합과정의 일부로서 지질학 문헌으로 정확하게 기록된 것은 드문 편이다. 일반적으로 조성이 다른 두 마그마가 접촉하면 마그마 혼합작용(mixing)이 일어나며 이에는 완전히 혼합이 되기 전에 비혼합(unmixing) 상태의 혼화작용(mingling)과 혼성작용(hybridization)을 겪게 된다(Hibbard, 1995). |
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