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청송 세계지질공원 내 백악기 일직층, 점곡층, 사곡층의 쇄설성 저어콘 U-Pb 연령: 퇴적시기와 기원지
Detrital zircon U-Pb ages of the Cretaceous Iljik, Jeomgok, and Sagok formations in the Cheongsong Global Geopark, Korea: Depositional age and Provenance 원문보기

한국지구과학회지 = Journal of the Korean Earth Science Society, v.42 no.1, 2021년, pp.11 - 38  

채용운 (부산대학교 지질환경과학과) ,  최태진 (조선대학교 첨단에너지공학과) ,  백인성 (부경대학교 지구환경과학과) ,  김종선 (국립공원공단 국립공원연구원) ,  김현주 (부경대학교 지구환경과학과) ,  정훈영 (부산대학교 지질환경과학과) ,  임현수 (부산대학교 지질환경과학과)

초록
AI-Helper 아이콘AI-Helper

경상분지 하양층군의 퇴적시기와 기원지 변화를 밝히기 위해 청송 세계지질공원의 지질명소인 백석탄(일직층), 만안자암(점곡층), 신성리(사곡층) 지역에서 쇄설성 저어콘에 대한 U-Pb 연령측정을 실시하였다. 일직층에서는 백악기 저어콘이 발견되지 않고 쥐라기와 트라이아스기의 저어콘이 대부분이며, 선캄브리아 시대의 저어콘은 드물게 산출된다. 반면 점곡층과 사곡층은 백악기와 쥐라기, 고원생대의 저어콘이 우세하며 유사한 연령분포를 보인다. 점곡층과 사곡층의 백악기 저어콘에서 각각 103.2±0.3 Ma와 104.2±0.5 Ma의 가장 젊은 가중평균연령을 구했다. 연구결과에 의하면 점곡층 및 사곡층의 퇴적시기는 앨비안에 해당된다. 쇄설성 저어콘의 연령분포는 일직층과 점곡층 사이에 기원지의 중요한 변화가 있었음을 지시한다. 일직층은 주로 주변의 관입암체에서 퇴적물이 공급된 것으로 보이지만, 점곡층과 사곡층은 일본 남서부의 쥐라기 부가대의 비교적 젊은 퇴적단위로부터 기원한 것으로 해석된다.

Abstract AI-Helper 아이콘AI-Helper

Detrital zircon U-Pb dating of samples from the Baekseoktan (Iljik Formation), Mananjaam (Jeomgok Formation), and Sinseongri (Sagok Formation) geosites in the Cheongsong Global Geopark were carried out to estimate the depositional age and provenance of the Hayang Group in the Gyeongsang Basin. In th...

주제어

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