Print Email Facebook Twitter Determining Individual Particle Magnetizations in Assemblages of Micrograins Title Determining Individual Particle Magnetizations in Assemblages of Micrograins Author de Groot, L.V. (Universiteit Utrecht) Fabian, Karl (Geological Survey of Norway) Béguin, Annemarieke (Universiteit Utrecht) Reith, Pim (University of Twente) Barnhoorn, A. (TU Delft Applied Geophysics and Petrophysics) Hilgenkamp, Hans (University of Twente) Date 2018 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. Subject Rock magnetismRock physics To reference this document use: http://resolver.tudelft.nl/uuid:ffe14bc6-67b0-46f1-bb3b-4196f02e4831 DOI https://doi.org/10.1002/2017GL076634 ISSN 0094-8276 Source Geophysical Research Letters, 45 (7), 2995-3000 Part of collection Institutional Repository Document type journal article Rights © 2018 L.V. de Groot, Karl Fabian, Annemarieke Béguin, Pim Reith, A. Barnhoorn, Hans Hilgenkamp Files PDF Groot_et_al_2017_Geophysi ... etters.pdf 4.16 MB Close viewer /islandora/object/uuid:ffe14bc6-67b0-46f1-bb3b-4196f02e4831/datastream/OBJ/view