High paleointensities for the Canary Islands constrain the Levant geomagnetic high

de Groot, Lennart V, Béguin, Annemarieke, Kosters, Martha E, van Rijsingen, Elenora M, Struijk, Erzsébet LM, Biggin, Andy ORCID: 0000-0003-4164-5924, Hurst, Elliot, Langereis, Cor G and Dekkers, Mark J (2015) High paleointensities for the Canary Islands constrain the Levant geomagnetic high. Earth and Planetary Science Letters, 419. pp. 154-167.

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Abstract

Understanding the behavior of enigmatic geomagnetic traits such as the Levant intensity high is currently challenged by a lack of full vector records of regional variations in the geomagnetic field. Here we apply the recently proposed multi-method paleointensity approach to a suite of 19 lavas from the Canary Islands dating between ∼4000 BC and 1909 AD. Our new record reveals high paleointensities (VADMs >120 ZAm2) coinciding with and shortly after the peak in geomagnetic intensity in the Levant at ∼1000 BC. Furthermore our data suggests a westward movement of this geomagnetic phenomenon at a rate of 6.7–12° per century. In addition to IZZI-Thellier, microwave-Thellier and the multi-specimen method, the calibrated pseudo-Thellier method is an important part of the multi-method paleointensity approach. The calibration of this relative paleointensity method was derived from a suite of Hawaiian lavas; it is improved with the results of the Canarian cooling units. Pseudo-Thellier results from samples with very low Curie temperature (<150 °C), however, cannot be reliably converted to absolute paleointensity estimates. The multi-method paleointensity approach yielded a reliable estimate for ∼60% of the flows sampled – an unusually high success rate for a paleointensity study involving lavas.

Item Type:	Article
Uncontrolled Keywords:	paleointensity, Canary Islands, multi-method paleointensity approach, Thellier, intensity highs
Subjects:	?? QE ??
Depositing User:	Symplectic Admin
Date Deposited:	10 Oct 2016 09:27
Last Modified:	19 Jan 2023 07:29
DOI:	10.1016/j.epsl.2015.03.020
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3003698

Available Versions of this Item

• High paleointensities for the Canary Islands constrain the Levant geomagnetic high. (deposited 09 Jul 2015 09:28)
  • High paleointensities for the Canary Islands constrain the Levant geomagnetic high. (deposited 10 Oct 2016 09:27) [Currently Displayed]