백운산 향사대에 분포하는 동고층에 대한 고지자기 연구

• 영문명: Paleomagnetism of the Tonggo formation in the Baekunsan syncline
• 발행기관: 대한자원환경지질학회
• 저자명: 도성재(Seong Jae Doh)
• 간행물 정보: 『자원환경지질』26권 3호, 383~393쪽, 전체 11쪽
• 주제분류: 자연과학 > 지질학
• 파일형태: PDF
• 발행일자: 1993.06.30

영문 초록

Paleomagnetic data have been obtained from the Lower Triassic Tonggo formation which is exposed in the E-W trending Baekunsan syncline comprising the Pyongan Supergroup in eastern Korea. Two ancient components of magnetization are recovered in this formation by detailed thermal demagnetization: a post-folding component and a pre-folding component. The post-folding component (D/I =58.8/55.5°) is normally magnetized and appears to acquire in the Cretaceous Normal Superchron. It is a magnetic signature of the Daebo Orogeny and has been rotated clockwise since this magnetization has been acquired, in common with the main synclinal axis. The pre-folding component (D/I=1.1/19.4°, Paleopole at 306.1°E, 63.2°N) passes fold and reversal tests and is inferred to be a post-depositional or early chemical diagenetic remanence of Lower-Middle Triassic age. This paleopole corresponds only with the Lower Triassic poles from the North China Block: it is removed from the contemporary poles from the South China Block. If the result of this study is corrected for the clockwise rotation deduced from the Cretaceous overprint, the enhanced agreement with the Lower Triassic poles from the North China block can be achieved. Therefore, a first order correlation between the Korean Peninsula and North China at least since Lower Triassic times is identified in this study.

목차

ABSTRACT

서론

일반지질 및 시료채취

실험방법

고지자기 결과

암석자기 결과

고찰 및 결론

참고문헌