A Late Holocene geomagnetic secular variation record from Erhai Lake, southwest China

A Late Holocene geomagnetic secular variation record from Erhai Lake, southwest China

A secular variation record of the geomagnetic field direction for the last 6.5 kyr has been obtained from the magnetization of sediment cores from Erhai Lake, southwest China. In order to make a comparison with this record, secular variation in east-central China was investigated by combining availa...

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Veröffentlicht in:Geophysical journal international 1999-03, Vol.136 (3), p.784-790
Hauptverfasser: Hyodo, Masayuki, Yoshihara, Arata, Kashiwaya, Kenji, Okimura, Takashi, Masuzawa, Toshiyuki, Nomura, Ryotaro, Tanaka, Shingo, Xing, Tang Bang, Qing, Liu Su, Jian, Liu Shi
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geomagnetic variation
palaeomagnetism
sediments
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container_end_page 790
container_issue 3
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container_title Geophysical journal international
container_volume 136
creator Hyodo, Masayuki
Yoshihara, Arata
Kashiwaya, Kenji
Okimura, Takashi
Masuzawa, Toshiyuki
Nomura, Ryotaro
Tanaka, Shingo
Xing, Tang Bang
Qing, Liu Su
Jian, Liu Shi
description A secular variation record of the geomagnetic field direction for the last 6.5 kyr has been obtained from the magnetization of sediment cores from Erhai Lake, southwest China. In order to make a comparison with this record, secular variation in east-central China was investigated by combining available magnetic field data from historical records and archaeomagnetic measurements since about 350 bc. The secular variation in Erhai Lake shows features consistent with the combined record, except for the oldest three observed declination swings in Sian from 720 to 900 ad. Many features of declination and inclination in China also occur in Japan. From 500 to 1000 ad, declination was westerly ranging from about −20° to −5° in Erhai Lake, east-central China, and Japan.
doi_str_mv 10.1046/j.1365-246x.1999.00764.x
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source Oxford Journals Open Access Collection; Wiley Online Library Journals Frontfile Complete
subjects geomagnetic variation
palaeomagnetism
sediments
title A Late Holocene geomagnetic secular variation record from Erhai Lake, southwest China
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