Results 11 to 20 of about 34,130 (243)

Single Particle Multipole Expansions From Micromagnetic Tomography

open access: yesGeochemistry, Geophysics, Geosystems, 2021
Micromagnetic tomography aims at reconstructing large numbers of individual magnetizations of magnetic particles from combining high‐resolution magnetic scanning techniques with micro X‐ray computed tomography (microCT).
David Cortés‐Ortuño   +2 more
doaj   +1 more source

Magnetic Mineralogy of Speleothems From Tropical-Subtropical Sites of South America

open access: yesFrontiers in Earth Science, 2021
Fe-bearing minerals are a tiny fraction of the composition of speleothems. They have their origin in the karst system or are transported from the drainage basin into the cave.
Plinio Jaqueto   +8 more
doaj   +1 more source

A First‐Order Statistical Exploration of the Mathematical Limits of Micromagnetic Tomography

open access: yesGeochemistry, Geophysics, Geosystems, 2022
The recently developed Micromagnetic Tomography (MMT) technique combines advances in high resolution scanning magnetometry and micro X‐ray computed tomography.
Frenk Out   +4 more
doaj   +1 more source

Simulation of Natural Iron Oxide Alteration in Soil: Conversion of Synthetic Ferrihydrite to Hematite Without Artificial Dopants, Observed With Magnetic Methods

open access: yesGeochemistry, Geophysics, Geosystems, 2020
We present new results on the conversion of pure, undoped synthetic ferrihydrite, wet‐annealed at pH 6.56 and 90°C without stabilizing ligands, to nanophase goethite, hematite, and an intermediate magnetic phase, nanophase maghemite.
Dario Bilardello   +4 more
doaj   +1 more source

Further evidence for early lunar magnetism from troctolite 76535 [PDF]

open access: yes, 2017
The earliest history of the lunar dynamo is largely unknown and has important implications for the thermal state of the Moon and the physics of dynamo generation.
Garrick-Bethell, Ian   +4 more
core   +1 more source

Evidence for Widespread Remagnetizations in South America, Case Study of the Itararé Group Rocks From the State of São Paulo, Brazil

open access: yesFrontiers in Earth Science, 2018
Paleomagnetism of South American Jurassic/Cretaceous rocks has been troubled by elongated distributions of poles which has led to contrasting interpretations.
Dario Bilardello   +3 more
doaj   +1 more source

Investigating the utility of a high-temperature Thellier-style paleointensity experimental protocol

open access: yesEarth, Planets and Space, 2021
High-quality data are vital to the research field of paleointensity, which has long suffered from poor-quality and/or sparse data. Previous paleointensity work has established that repeatedly heating specimens increases the opportunity for thermochemical
J. Michael Grappone   +2 more
doaj   +1 more source

The magnetic record of the Late Glacial-Holocene transition in sediments from Grandfather Lake (Southwest Alaska)

open access: yesGeofísica Internacional, 1999
Las mediciones preliminares de propiedades magnéticas en muestras de un núcleo de 8.5 m. de longitud del lago Granfather (suroeste de Alaska), indican que la magnetización remanente de estos sedimentos reside en magnetita con comportamiento de ...
Pieter A. Vlag, Subir K. Banerjee
doaj   +1 more source

Variations in the Magnetic Properties of Meteoritic Cloudy Zone

open access: yesGeochemistry, Geophysics, Geosystems, 2020
Iron and stony‐iron meteorites form the Widmanstätten pattern during slow cooling. This pattern is composed of several microstructures whose length‐scale, composition and magnetic properties are dependent upon cooling rate.
Claire I. O. Nichols   +7 more
doaj   +1 more source

Magnetic Vortex States in Small Octahedral Particles of Intermediate Titanomagnetite

open access: yesGeochemistry, Geophysics, Geosystems, 2018
Fine particles of titanomagnetites (Fe3‐xTixO4, x > 0.5) in the pseudo‐single‐domain (PSD) size (0.5–20 μm) are important carriers of natural remanent magnetization in basalts.
E. Khakhalova   +4 more
doaj   +1 more source

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