金浦지역 大同累層群에 대한 古磁氣 연구

• 영문명: Palaeomagnetism of the Taedong supergroup in the Kimpo area
• 발행기관: 대한자원환경지질학회
• 저자명: 김인수(In Soo Kim) 민경덕(Kyung Duck Min) 이미영(Mi Yeong Lee) 강희철(Hee Cheol Kang) 전희영(Hee Young Chun)
• 간행물 정보: 『자원환경지질』26권 2호, 193~206쪽, 전체 14쪽
• 주제분류: 자연과학 > 지질학
• 파일형태: PDF
• 발행일자: 1993.04.30

영문 초록

A total of 111 independently oriented core samples were drilled at 12 sites in the Kimpo area (37.70°N, 126.55°E) of the Taedong Supergroup. The Taedong strata are composed of sandstone, conglomeratic sandstone, shale and thin coal seams. The age of the strata is known to be Late Triassic-Early Jurassic according to fresh-water Estherites and plant fossil (Dictyophyllum-Clathropteris flora) contents. Through AF and thermal demagnetization, an area-mean ChRM direction of D=48.3° I=40.3° α95=7.9° k=59.5, n=7 was obtained. It passed fold and reversal test in the formation-mean level. Fold test was not significant in the area-mean level. The palaeomagnetic north pole calculated from the area-mean lies at 46.3°N, 222.0°E with dp =5.7, dm =9.5°. This pole position is very similar to those of the South China Block (SCB) in Triassic times. Palaeolatitude of the Kimpo area in the Taedong times was 23.0°N, again very similar to the palaeolatitude of the South China Block in the Late Triassic. This low latitude of the study area at the time of deposition explains the tropical-subtropical nature of fossil contents of the Taedong Supergroup.

목차

ABSTRACT

서론

일반지질

시료채취

연구방법

잔류자기 세척실험

실험 결과

고찰

결론

참고문헌