濟州島에 分布하는 火山岩類 및 堆積岩類에 對한 古地磁氣 硏究

• 영문명: Paleomagnetic Study on the Volcanic and Sedimentary Rocks of Jeju Island
• 발행기관: 대한자원환경지질학회
• 저자명: Kyung Duck Min(閔庚德) Joong Sun Won(元重善) Suk Yeon Hwang(黃石淵)
• 간행물 정보: 『자원환경지질』19권 2호, 153~163쪽, 전체 11쪽
• 주제분류: 자연과학 > 지질학
• 파일형태: PDF
• 발행일자: 1986.04.30

영문 초록

Paleomagnetic and geological studies of volcanic and sedimentary rocks of Jeju Island have been carried out to determine the position of virtual geomagnetic pole(VGP), and to estimate the geological sequence and their age. As a result of paleomagnetic studies, the reversal polarities are measured in the Sanbangsan trachyte and Hwasun formation, and the normal are the rest. In case of normal polarity, the mean values of declination and inclination are 2.3° and 48.4°, respectively, and the average value of VGP is 85.4°N and 79.9°W. The locations of VGP’s are coincident with those obtained from world-wide Plio-Pleistocene rocks. The Hwasun formation and Seongsan formation which have been known to be sedimented in the similar time in the 2nd-stage of volcanic eruption, possess reversal and normal polarities, respectively. This fact brings about the result that two formations should be separated in a sense of geological sequence. Consequently, the geological sequence of the 2nd-stage of volcanic eruption is Pyoseonri basalt-Seoguipo hawaiite-Hwasun formation-Seongsan formation-Jungmun hawaiite-Sanbangsan trachyte. Referring to the paleomagnetic studies and the previous and present geological studies, Seoguipo formation corresponds to the Gauss normal epoch, the 2nd-stage of volcanic eruption to Matuyama reversed epoch, and the 3rd-, 4th-, and 5th-stages to Brunhes normal epoch. Therefore, the Seoguipo formation is mostly sedimented during late Pliocene and/or presumably extended to the early Pleistocene. The rocks of the 2nd- to 5th-stage are formed later than this.

목차

Abstract

序言

地質

古地磁氣硏究

結論

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