Economic and Environmental Geology (자원환경지질)
- Volume 27 Issue 2
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- Pages.209-212
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- 1994
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- 1225-7281(pISSN)
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- 2288-7962(eISSN)
Quaternary Tectonic Movement on Cheju Island
제주도의 제4기 지구조운동
-
Hwang, Jae Ha
(Korea Institute of Geology, Mining and Materials)
;
- Lee, Byung Joo (Korea Institute of Geology, Mining and Materials) ;
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Song, Kyo Young
(Korea Institute of Geology, Mining and Materials)
- Received : 1994.01.14
- Published : 1994.04.25
Abstract
Cheju Island was formed by volcanic activity probably related to the inferred geodynamics in the early Quaternary times. Paleostress analysis, in spite of a few fault slip data collected near Sanbangsan trachyte dome (dated 0.87 Ma) represents an extentional tectonic event with the direction ENE-WSW. Joint anayses in the vicinity of Seahwa reveal three extensional tectonic events of directions NW-SE, NE-SW and ENE-WSW. Especially the extensional event with the direction ENE-WSW affected the whole Cheju area during the most recent time.
Keywords