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NTIS 바로가기자원환경지질 = Economic and environmental geology, v.49 no.5, 2016년, pp.389 - 410
Wide ranges of fission-track (FT) ages were obtained from the Jurassic granite batholith in Jeonju-Gimje-Jeongeup area, southwestern Okcheon Belt: sphene=158~70 Ma; zircon=127~71 Ma; apatite=72~46 Ma. Thermochronological analyses based on undisturbed primary cooling and reset or partially-reduced FT...
핵심어 | 질문 | 논문에서 추출한 답변 |
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U-Pb 연대 측정법은 무엇을 이용한 방법인가? | 2000년대에 들어와서부터는 주로 저콘 또는 스핀을 이용한 U-Pb 연대 측정법에 기반하여 옥천대 중부에서 남서부에 이르는 광범위한 지역에 분포하는 다양한 암상의 쥬라기 화강암질암에 대한 연대 측정연구들이 활발하게 수행돼왔다(Table 1). 특히 전주-김제-정읍 일대의 전주전단대와 그 주변에 산출되는 거대한 저반상 화강암복합체에 대해서는 다양한 암상별로 관입 시기의 정의가 잘 이루어졌다(Lee et al. | |
한반도 남서부에 존재하는 연성전단대는? | 한반도 남서부에는 가장 규모가 큰 진안-오수-순창-강진을 잇는 순창전단대를 위시하여, 전주-무안-목포 간의 전주전단대, 장성-무안 간의 광주전단대, 영광 부근에서 전주전단대로부터 갈라진 영광전단대 등 여러 조의 연성전단대(延性剪斷帶, ductile shear zone)가 존재한다. Yanai et al. | |
호남전단대의 화강암질암은 어떻게 해석되는가? | (1985)이 옥천대 남서부의 넓은 지역에 발달돼있는 여러 조의 전단대를 호남전단대라 처음 명명하고 구조지질학적 특징에 관해 보고한 이래, 전단대의 성인과 형성시기 규명은 한반도를 포함한 동아시아의 지구조 진화를 이해하기 위한 주요 연구주제로 부각돼왔다. 특히 전단대에 분포하는 유색광물의 엽리조직을 뚜렷하게 보이는 화강암질암은 연성변형작용을 받은 압쇄암으로 해석됨으로써(Lee et al., 1990, 2001; Kim et al. |
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