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NTIS 바로가기암석학회지 = The journal of the petrological society of korea, v.25 no.1, 2016년, pp.29 - 37
정원석 (충북대학교 지구환경과학과) , 조문섭 (서울대학교 지구과학교육과) , 이기욱 (한국기초과학지원연구원 환경.소재분석본부) , 이민성 (서울대학교 지구과학교육과) , 김윤섭 (충북대학교 지구환경과학과)
A "granite boulder", ~70 cm in size, was reported from the Geumgang Limestone, and has been considered as a glaciogenic dropstone. Since this interpretation has enormous implications for unraveling the evolution history of the Ogcheon Metamorphic Belt, we re-examined the contact relationship and str...
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핵심어 | 질문 | 논문에서 추출한 답변 |
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옥천변성대 내에는 무엇이 분포하는가? | 옥천변성대 내에는 특징적으로 연장성이 좋은 석회암층이 광역적으로 분포한다(Choi et al., 2012; Choi, 2014). | |
쇄설성(변성)퇴적암의 연대측정 및 근원지 해석을 위한 대안으로는 무엇이 있는가? | 화석이 발견되지 않거나 드문 쇄설성(변성)퇴적암의 연대측정 및 근원지 해석을 위한 대안으로 고분해능 이차이온질량분석기(SHRIMP)나 레이저 삭박 유도결합 플라즈마 질량분석기(LA-ICP-MS)를 이용한 쇄설성 저어콘 연대측정이 최근 크게 각광을 받고 있다(e.g. | |
화강암 거력은 어떤 증거로 제시되었는가? | , 1998b). 이 거력은 매우 특이하게도 석회암층 내부에서 고립되어 산출하기 때문에 빙하기원을 지시하는 결정적 증거로 제시되었다. 더 나아가 금강 석회암이 신원생대의 눈덩어리 지구(Snowball Earth)에 수반된 빙하 기원의 덮개 탄산염암(cap carbonate)으로 해석된 바 있다(Choi et al. |
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Cheong, C.-S., Kim, N., Yi, K., Jo, H.J., Jeong, Y.-J., Kim, Y., Koh, S.M., Iizuka, T., 2015, Recurrent rare earth element mineraliztion in the northwestern Okcheon Metamorphic Belt, Korea: SHRIMP U-Th-Pb geochronology, Nd isotope geochemistry, and tectonic implications. Ore Geology Reviews, 71, DOI:10.1016/j.oregeorev.2015.05.012
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