Environmental magnetism record of volcano ejecting events in the middle Okinawa Trough

LI Ping; LI Pei-ying; XU Xing-yong; CAO Cheng-xiao; DU Jun

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LI Ping, LI Pei-ying, XU Xing-yong, CAO Cheng-xiao, DU Jun. Environmental magnetism record of volcano ejecting events in the middle Okinawa Trough[J]. Haiyang Xuebao, 2008, 30(1): 100-104.

Citation:

LI Ping, LI Pei-ying, XU Xing-yong, CAO Cheng-xiao, DU Jun. Environmental magnetism record of volcano ejecting events in the middle Okinawa Trough[J]. Haiyang Xuebao, 2008, 30(1): 100-104.

LI Ping, LI Pei-ying, XU Xing-yong, CAO Cheng-xiao, DU Jun. Environmental magnetism record of volcano ejecting events in the middle Okinawa Trough[J]. Haiyang Xuebao, 2008, 30(1): 100-104.

Citation:

LI Ping, LI Pei-ying, XU Xing-yong, CAO Cheng-xiao, DU Jun. Environmental magnetism record of volcano ejecting events in the middle Okinawa Trough[J]. Haiyang Xuebao, 2008, 30(1): 100-104.

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Environmental magnetism record of volcano ejecting events in the middle Okinawa Trough

Key Laboratory of Marine Sediment and Environmental Geology of State Oceanic Administration, First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China

Received Date: 2006-12-29
Rev Recd Date: 2007-08-31

Abstract

Abstract

Multiple experiments measurements, such as AMS ¹⁴C dating, magnetic susceptibility, anhyster esis remanent magnetization and saturation remanent magnetization, were made on 64 samples of the DH 180 core sediment taken from the middle Okinaw a Trough.Magnetic parameters verified singularly at the two layers that sediments contain more volcanic matter.The magnetic susceptibility, the anhysteresis remanent magnetization and the saturation remanent magnetization show an increasing tendency, and the saturation shows a decreasing tendency oppositely at the depths from 57.5 to 82.5 cm and from 212.5 to 252.5 cm.The time of volcano ejecting events was calculated based on the data of datings at the depths of magnetic parameters changing evidently.It happened at 12.6 and 6.2 ka respectively, and the time of the last volcano ejecting event was consistent with K-Ah volcano ejecting events.
- Okinawa Trough,
- volcano ejecting event,
- environmental magnetism

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References(20)

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