Results 11 to 20 of about 1,324 (221)
Micromagnetic Tomography for Paleomagnetism and Rock-Magnetism. [PDF]
J Geophys Res Solid Earth, 2021 Abstract Our understanding of the past behavior of the geomagnetic field arises from magnetic signals stored in geological materials, e.g., (volcanic) rocks. Bulk rock samples, however, often contain magnetic grains that differ in chemistry, size, and shape; some of them record the Earth's magnetic field well, others are unreliable ...
de Groot LV +9 more
europepmc +10 more sources
The importance of clays in speleothem magnetic remanence acquisition [PDF]
Scientific ReportsSpeleothems are promising recorders of paleosecular variation of the Earth’s magnetic field, but ambiguities remain about the physical processes active during remanence acquisition.
Rashida Doctor +4 more
doaj +2 more sources
Magnetic Properties of Plant Ashes and Their Influence on Magnetic Signatures of Fire in Soils
Frontiers in Earth Science, 2021 Fires are an integral part of many terrestrial ecosystems and have a strong impact on soil properties. While reports of topsoil magnetic enhancement after fires vary widely, recent evidence suggests that plant ashes provide the most significant source of
Jessica L. Till +3 more
doaj +1 more source
Earth and Space Science, 2021 Sedimentary rocks of the Itararé Group, deposited during the Late Paleozoic Ice Age in the Paraná Basin of South America, were collected throughout the state of São Paulo, Brazil, for an anisotropy of magnetic susceptibility (AMS) and rock‐magnetic study.
Dario Bilardello
doaj +1 more source
Frontiers in Earth Science, 2021 Quantum diamond microscope (QDM) magnetic field imaging is a recently developed technique capable of mapping magnetic field sources in geologic samples at 1 micrometer resolution.
Roger R. Fu +10 more
doaj +1 more source
Single Particle Multipole Expansions From Micromagnetic Tomography
Geochemistry, 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
Frontiers 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
Geochemistry, 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
Frontiers in Earth Science, 2022 The Ocean Drilling Program Site 1177 recovered the oldest (∼23 Ma) sedimentary records in the Shikoku Basin, northeastern part of the Philippine Sea Plate.
Wei Liu +10 more
doaj +1 more source
Geochemistry, 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