Results 11 to 20 of about 2,033 (309)

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

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

Tracking Subsurface Active Weathering Processes in Serpentinite

open access: yesGeophysical Research Letters, 2021
We conducted a novel study to capture the on‐going advancement of mineral weathering within a serpentinite formation by using an integrated approach of multi‐scale quantitative rock magnetic analyses and nano‐resolution geochemical imaging analyses.
Masako Tominaga   +7 more
doaj   +1 more source

High‐Resolution Magnetic‐Geochemical Mapping of the Serpentinized and Carbonated Atlin Ophiolite, British Columbia: Toward Establishing Magnetometry as a Monitoring Tool for In Situ Mineral Carbonation

open access: yesGeochemistry, Geophysics, Geosystems, 2023
We address in situ serpentinization and mineral carbonation processes in oceanic lithosphere using integrated field magnetic measurements, rock magnetic analyses, superconducting quantum interference device (SQUID) microscopy, microtextural observations,
Masako Tominaga   +5 more
doaj   +1 more source

Separating Geometry‐ From Stress‐Induced Remanent Magnetization in Magnetite With Ilmenite Lamellae From the Stardalur Basalts, Iceland

open access: yesGeochemistry, Geophysics, Geosystems, 2020
Realistic geometries of magnetite grains from the Stardalur volcano, Iceland, were obtained by Focused Ion Beam Scanning Electron Microscopy nanotomography. These magnetite grains are subdivided by oxidation‐exsolution lamellae of ilmenite.
G. W. terMaat   +3 more
doaj   +1 more source

Home - About - Disclaimer - Privacy