Determining Individual Particle Magnetizations in Assemblages of Micrograins

Lennart V. de Groot* (Corresponding Author), Karl Fabian, Annemarieke Béguin, Pim Reith, Auke Barnhoorn, Hans Hilgenkamp

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

4 Citations (Scopus)
45 Downloads (Pure)

Abstract

Obtaining reliable information from even the most challenging paleomagnetic recorders, such as the oldest igneous rocks and meteorites, is paramount to open new windows into Earth's history. Currently, such information is acquired by simultaneously sensing millions of particles in small samples or single crystals using superconducting quantum interference device magnetometers. The obtained rock-magnetic signal is a statistical ensemble of grains potentially differing in reliability as paleomagnetic recorder due to variations in physical dimensions, chemistry, and magnetic behavior. Here we go beyond bulk magnetic measurements and combine computed tomography and scanning magnetometry to uniquely invert for the magnetic moments of individual grains. This enables us to select and consider contributions of subsets of grains as a function of particle-specific selection criteria and avoid contributions that arise from particles that are altered or contain unreliable magnetic carriers. This new, nondestructive, method unlocks information from complex paleomagnetic recorders that until now goes obscured.

Original languageEnglish
Article numberL076634
Pages (from-to)2995-3000
Number of pages6
JournalGeophysical research letters
Volume45
Issue number7
DOIs
Publication statusPublished - 16 Apr 2018

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recorders
magnetization
magnetic measurement
magnetic signals
igneous rocks
meteorites
magnetometer
meteorite
igneous rock
magnetometers
set theory
tomography
magnetic moments
histories
rocks
chemistry
crystal
interference
scanning
single crystals

Keywords

  • Rock magnetism
  • Rock physics

Cite this

de Groot, L. V., Fabian, K., Béguin, A., Reith, P., Barnhoorn, A., & Hilgenkamp, H. (2018). Determining Individual Particle Magnetizations in Assemblages of Micrograins. Geophysical research letters, 45(7), 2995-3000. [L076634]. https://doi.org/10.1002/2017GL076634
de Groot, Lennart V. ; Fabian, Karl ; Béguin, Annemarieke ; Reith, Pim ; Barnhoorn, Auke ; Hilgenkamp, Hans. / Determining Individual Particle Magnetizations in Assemblages of Micrograins. In: Geophysical research letters. 2018 ; Vol. 45, No. 7. pp. 2995-3000.
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de Groot, LV, Fabian, K, Béguin, A, Reith, P, Barnhoorn, A & Hilgenkamp, H 2018, 'Determining Individual Particle Magnetizations in Assemblages of Micrograins', Geophysical research letters, vol. 45, no. 7, L076634, pp. 2995-3000. https://doi.org/10.1002/2017GL076634

Determining Individual Particle Magnetizations in Assemblages of Micrograins. / de Groot, Lennart V. (Corresponding Author); Fabian, Karl; Béguin, Annemarieke; Reith, Pim; Barnhoorn, Auke; Hilgenkamp, Hans.

In: Geophysical research letters, Vol. 45, No. 7, L076634, 16.04.2018, p. 2995-3000.

Research output: Contribution to journalArticleAcademicpeer-review

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