Palaeomagnetic evidence for the persistence or recurrence of geomagnetic main field anomalies in the South Atlantic
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- 作者：Jay Shaha ; jay.shah109@imperial.ac.uk" class="auth_mail" title="E-mail the corresponding author ; Anthony A.P. Koppersb ; Marko Leitnerc ; Roman Leonhardtd ; Adrian R. Muxworthya ; Christoph Heunemannc ; Valerian Bachtadsec ; Jack A.D. Ashleya ; Jü ; rgen Matzkae
- 关键词：palaeomagnetic ; Ar/Ar dating ; Tristan da Cunha ; South Atlantic Anomaly ; geomagnetic field ; magnetic anomaly
- 刊名：Earth and Planetary Science Letters
- 出版年：2016
- 出版时间：1 May 2016
- 年：2016
- 卷：441
- 期：Complete
- 页码：113-124
- 全文大小：1115 K
文摘
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A unique paleomagnetic dataset from Tristan da Cunha in the South Atlantic.
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Lava flows Ar/Ar dated as 46 to 90 ka.
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Average paleointensity 18±6 μT: weaker than global paleomagnetic average.
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Data suggest magnetic anomaly present in the Late Pleistocene in the South Atlantic.