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NTIS 바로가기자원환경지질 = Economic and environmental geology, v.49 no.6, 2016년, pp.433 - 444
김명정 (부경대학교 일반대학원 지구환경시스템과학부) , 박정웅 (숭문고등학교) , 이태호 (부경대학교 일반대학원 지구환경시스템과학부) , 송용선 (부경대학교 일반대학원 지구환경시스템과학부) , 박계헌 (부경대학교 일반대학원 지구환경시스템과학부)
The U-Pb ages of detrital zircons from the Baengnyeong Group were determined by LA-MC-ICPMS, yielding condensed age population in the range from 1100 Ma to 1800 Ma corresponding to the Mesoproterozoic to late Paleoproterozoic. However, detrital zircons of ca.1800-2000 Ma or ca. 2500 Ma ages, which a...
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핵심어 | 질문 | 논문에서 추출한 답변 |
---|---|---|
저어콘 연령은 어디에 집중되는가? | 백령층군의 사암에서 분리한 쇄설성 저어콘에 대해 LA-MC-ICPMS를 이용하여 U-Pb 연령을 측정하였다. 저어콘 연령은 주로 중원생대와 고원생대말의 기간인 약 1100-1800 Ma의 범위에 집중된다. 그러나 하부고생대 조선누층군이나 상부고생대 평안누층군의 쇄설성 저어콘들에서 흔히 나타나는 1800-2000 Ma 또는 약 2500 Ma의 고원생대 연령은 거의 나타나지 않는 특징을 보인다. | |
백령도는 어디에 위치하는가? | 백령도는 북한 황해남도의 서쪽 끝에서 서해쪽으로 돌출해있는 장산곶을 마주보는 곳에 위치한다. 이 연구에서는 앞에서 언급한 문제들에 대한 논의의 단서를 구하기 위한 방도의 하나로 지리적인 위치로 볼 때 인접한 황해남도의 지질이 연장되어 분포할 가능성이 매우 높은 백령도에서 채취한 규질 사암으로부터 분리한 저어콘에 대한 U-Pb 연대측정을 수행하였으며, 그 결과를 보고한다. | |
저어콘 연령의 특징은 무엇인가? | 저어콘 연령은 주로 중원생대와 고원생대말의 기간인 약 1100-1800 Ma의 범위에 집중된다. 그러나 하부고생대 조선누층군이나 상부고생대 평안누층군의 쇄설성 저어콘들에서 흔히 나타나는 1800-2000 Ma 또는 약 2500 Ma의 고원생대 연령은 거의 나타나지 않는 특징을 보인다. 이러한 특징은 북한의 신원생대 상원계 퇴적암과 동일하며, 백령층군이 상원계의 남서쪽 연장부에 해당함을 시사한다. |
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