남해 대륙붕 도미분지의 탄성파층서와 지구조운동 = Seismic stratigraphy and tectonics of Domi Basin, South Sea of Korea

다국어 초록 (Multilingual Abstract)

Seismic interpretation was carried out based on biostratigraphy of Fukue-1 well in Japan side of the Domi Basin and compared with the Cheju Basin and Tertiary basins in north-west Kyushu. East China Sea Basin including Domi Basin began developing in towrds the end of Late Cretaceous~Paleocene related to rifting. The basin had been filled with a thick package of syn-rift sediments during Paleocene and Oligocene and was under post-rift stage effected by transtenssion during Miocene. According to primary studies with seismic interpretation, the basin had been mostly filled with Miocene formation (>3km), but the Miocene formation is compatively thin from the result of this study. The thickness of the Miocene varies from tens of meters to hundreds of meters and the formation is getting thick to the SW direction and expanded over Oligocene formation of Cheju Basin. In addition, the index taxa of the Oligocene~Eocene nannofossils and dinoflagellates exists in the formation of the Cheju Basin and Tertiary basins in north-west Kyushu and it is well correlated to
the result of this study. On the base of seismic interpretation, normal faults with high angle are very common and negative flower structures which are related to right lateral strike-slip faults are found. The main strike of the normal faults changes from NE-SW direction in the Domi sub-basin to E-W direction Sora and North Sora sub-basin. The high angled normal faults in the North Sora sub-basin show inverted features, but they are reduced to the Sora sub-basin and have not been found in Domi sub-basin. In addition, the study of the negative flower structures and normal faults show that the Domi sub-basin and south parts of Sora sub-basin were expanded as a result of pull-apart movement.

목차 (Table of Contents)

• 1. 서언 1
• 2. 광역지질 5
• 2-1. 한반도 제3기분지 5
• 2-2. 북서 큐슈 제3기분지 6
• 2-3. 제주/도미 분지 6
• 3. 연구자료 8
• 3-1. 시추공 자료 8
• 3-2. 탄성파탐사자료 8
• 4. 해석 10
• 4-1. 시추공자료 해석 10
• 4-2. 탄성파 탐사자료 해석 12
• 5. 결과 및 토의 20
• 5-1. 마이오세 이전 20
• 5-2. 마이오세 21
• 5-3. 도미분지의 발달사 28
• 6. 결론 30
• 참고문헌 31
• Abstact 35