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NTIS 바로가기암석학회지 = The journal of the petrological society of korea, v.21 no.2 = no.68, 2012년, pp.235 - 247
Peridotite xenoliths hosted by alkali basalts from South Korea occur in Baengnyeong Island, Jeju Island, Boeun, Asan, Pyeongtaek and Ganseong areas. K-Ar whole-rock ages of the basaltic rocks range from 0.1 to 18.9 Ma. The peridotites are dominantly lherzolites and magnesian harzburgites, and the co...
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핵심어 | 질문 | 논문에서 추출한 답변 |
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우리나라에서 맨틀 포획암이 산출되는 지역은 어디인가? | 우리나라에서 맨틀 포획암이 산출되는 지역은 백령도, 간성일대, 아산-평택지역, 보은(조곡리) 및 제주도(신산리, 산굼부리, 선흘리, 낙천동, 송악산, 지그리오름) 등지 이다(Fig. 1). | |
암석권 맨틀 시료를 확보할 수 있는 두 가지 방법은? | 암석권 맨틀 시료를 확보할 수 있는 방법에는 크게 두 가지가 있다. 하나는 조산대 페리도타이트 암괴 (orogenic peridotite massif)의 형태로 지구조적으로 지표면에 노출되어 있는 경우이며(e.g., Menzies and Dupuy, 1991), 다른 하나는 알칼리현무암류나 킴벌라이트(kimberlite) 화산암내에 포획되어 온 경우이다(Nixon, 1987). 페리도타이트 암괴의 경우 노두 규모는 수 km에 달하기도 한다. | |
암석권 맨틀(lithospheric mantle)은 무엇인가? | 암석권 맨틀(lithospheric mantle)은 판(plate)의 일부로 대류하는 연약권(asthenosphere)으로부터 물리적 으로, 화학적으로 또 열적으로 분리되어 있는 지각의 뿌리를 이루는 공간이다. 물리적으로는 강체이며, 화학적으로는 연약권의 부분용융으로 생성된 액(분출하여 지각을 생성)을 분리하고 남은 잔류물(residue)로, 또 열적으로는 맨틀 단열선(adiabat)인 약 1280ºC 이하의 공간으로 간주된다(Nixon, 1987; Takahashi, 1990; Thompson, 1992). |
김윤규, 이대성, 송윤구, 김선억, 1988, 보은지역 조곡리 현무암에 함유된 초염기성 포획암의 암석학. 지질학회지, 24, 57-66.
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