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NTIS 바로가기자원환경지질 = Economic and environmental geology, v.52 no.1, 2019년, pp.49 - 64
조경오 (부경대학교 환경해양대학 지구환경과학과) , 박계헌 (부경대학교 환경해양대학 지구환경과학과) , 송용선 (부경대학교 환경해양대학 지구환경과학과) , 최지은 (부경대학교 교육대학원 지구과학교육전공)
SHRIMP U-Pb ages were analyzed for the detrital zircons separated from the Jangsan Formation of the Lower Paleozoic Joseon Supergroup in the Taebaeksan Basin and the Mungyeong area. Similar to the previously reported from Taebaeksan basin, the detrital zircons show strong peaks near the age of about...
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핵심어 | 질문 | 논문에서 추출한 답변 |
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규암층의 특징은? | 규암층 또는 규질사암층들은 풍화에 강하기 때문에 현저한 지형을 형성하고 있으며, 층서적 연구에 중요한 건층의 역할을 할 수 있다. 따라서 여러 시대미상 지층들에 대한 연구에서 이러한 규질암층의 시대를 결정하는 것은 매우 중요하다. | |
규질암으로 구성된 퇴적층을 통해 연대측정이 어려운 이유는? | 따라서 여러 시대미상 지층들에 대한 연구에서 이러한 규질암층의 시대를 결정하는 것은 매우 중요하다. 그러나 규질암으로 구성된 퇴적층은 대부분 화석의 산출이 불량하고 직접적인 연대측정도 쉽지 않기 때문에 한반도에 분포하는 여러 규암층들 역시 그 생성된 지질시대가 잘 알려지지 않은 것들이 많다. 그동안 지질시대가 확실하게 알려진 것으로 간주되던 하부고생대의 조선누층군의 장산층 조차도 최근에 그 생성시대가 캠브리아기인지 아니면 선캠브리아기인지에 대한 논란이 진행되고 있다(Chough et al. | |
한반도 기저암의 특징적 연령분포를 나타내주는 사례가 있나요? | 태백산분지에 분포하는 장산층에 대한 이전연구와이 연구의 결과를 모두 종합해보면 장산층의 쇄설성 저어콘 U-Pb 연령분포가 비교적 단순하며 약 18-20억년과 25억년 부근에 특징적인 연령피크를 보여줌이 확인된다. 표품별로 보면 두 연령 피크가 모두 나타나거나 둘 중에서 하나만 나타나기도 하며, 두 연령 사이 에서 부차적인 연령성분이 감지되기도 한다. |
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