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제목 Environmental magnetic study of core samples from Sogwipo maar on the Cheju Island (요지)
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2014-10-17 오후 2:13:43
Environmental magnetic study of core samples from Sogwipo maar on the Cheju Island

Environmental magnetic study of core samples from Sogwipo maar on the Cheju Island

# Masaharu Fukuoka[1], Akira Hayashida[2], Hitoshi Fukusawa[3], Keiji Takemura[4], Kazumi Matsuoka[5], Yoshinori
Yasuda[6]

[1] Doshisha Univ, [2] SERI, Doshisha Univ., [3] Dept. of Geography, Tokyo Metropolitan Univ., [4] Dept.Geophysics, Grad.
Sci., Kyoto Univ., [5] Lab. Coastal Environmental Sci., Nagasaki Univ., [6] IRCJS
In order to detect environmental magnetic records related to climate change from the last glacial period to the Holocene,
we investigated magnetic properties of core sediments from the Sogwipo marr in the south of Cheju Island, Korea. Low-field
magnetic susceptibility of organic-rich sediment above the depth of 2.5 m showed relatively small values, while large
fluctuation was observed in the lower sequence down to 9.5 m. The significant change observed at around 2.5 m is
presumably correlated to the post-glacial warming. The variation of magnetic mineral content in the lower part can be
attributed to occasional increases of precipitation during the last glacial period.

In order to detect environmental magnetic records related to climate change from the last glacial period to the Holocene,
we investigated magnetic properties of core sediments from the Sogwipo marr in the south of Cheju Island, Korea. Low-field
magnetic susceptibility of organic-rich sediment above the depth of 2.5 m showed relatively small values, while large
fluctuation was observed in the lower sequence down to 9.5 m. The significant change observed at around 2.5 m is
presumably correlated to the post-glacial warming. The variation of magnetic mineral content in the lower part can be
attributed to occasional increases of precipitation during the last glacial period.


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