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NTIS 바로가기암석학회지 = The journal of the petrological society of korea, v.28 no.2, 2019년, pp.111 - 128
황상구 (안동대학교 지구환경과학과) , 이소진 (안동대학교 기초과학연구소) , 안웅산 (제주특별자치도 세계유산본부)
Ulleung Island is the top of an intraplate alkalic volcano rising 3200 m from sea floor in the East Sea (or Sea of Japan). The emergent 984.6 m consist of eruptive products of basaltic, trachytic and phonolitic magmas, which are divided into Dodong Basaltic Rocks, and Ulleung, Seonginbong and Nari g...
핵심어 | 질문 | 논문에서 추출한 답변 |
---|---|---|
울릉도의 위치는 ? | 울릉도는 한반도 동해안에서 약 130 km 떨어진 동해 서부에 위치한다. 울릉도는 심해저 깊이 약 2,200 m에서 해수면 위로 984. | |
울릉도의 특징은 ? | 울릉도는 동해의 해저에서 3,200 m 판내 알칼리 화산의 상단부로 해수면 위에 984.6 m 높이로 출현한 섬이다. 이는 대체로 현무암질에서 조면암질과 포놀라이트질 마그마의 분출에 의해 형성되었으며, 도동현무암질암류, 울릉층군, 성인봉층군과 나리층군으로 구분된다. | |
현무암질암류는 무엇에 의해 관입되어 있는가? | 현무암질암류는 용암 및 화산쇄설암의 연속체로서 대부분 바다쪽으로 60~70o 경사되며, 이의 기저는 노출되지 않는다. 이 연속체는 여러 곳에서 현무암질 암맥과 조면암질 암맥에 의해 관입되어 있다. 몇몇 경우에 큰 암맥은 지표에 도달하여 용암류를 공급하였다. |
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