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Micromagnetic Tomography for Paleomagnetism and Rock‐Magnetism [PDF]

J Geophys Res Solid Earth, 2021
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
L. D. de Groot, K. Fabian, Annemarieke Béguin, M. Kosters, D. Cortés-Ortuño, R. Fu, C. Jansen, R. Harrison, T. van Leeuwen, A. Barnhoorn   +9 more
semanticscholar   +2 more sources

Diagenesis of Magnetic Minerals in Active/Relict Methane Seep: Constraints From Rock Magnetism and Mineralogical Records From Bay of Bengal

Frontiers in Earth Science, 2021
In this study, we conducted a comprehensive investigation of rock magnetic, mineralogical, and sedimentological records of sediment cores supplemented by a high resolution seismic data to elucidate the controls of structural and diagenetic (early vs ...
V. Gaikwad, F. Badesab, P. Dewangan, M. Kotha   +3 more
semanticscholar   +1 more source

An Enigma in Rock Magnetism: Can Microstructures in Magnetite Cause a Threefold Increase in the Efficiency of NRM Acquisition in the Stardalur Basalts?

Geophysical Journal International, 2022
Quaternary lavas of the Stardalur Caldera, 20 km northeast of Reykjavik, Iceland, create a 27 300 nT magnetic anomaly visible in both ground- and aeromagnetic surveys. Here, we provide a comprehensive mineralogical and rock magnetic data set to analyze
S. McEnroe, N. Church, K. Fabian, Marianne Stange, A. V. van Helvoort   +4 more
semanticscholar   +1 more source

Paleointensity and Rock Magnetism of Martian Nakhlite Meteorite Miller Range 03346: Evidence for Intense Small‐Scale Crustal Magnetization on Mars

Journal of Geophysical Research - Planets, 2021
The martian dynamo’s strength and duration are essential for understanding Mars' habitability and deep interior dynamics. Although most northern volcanic terranes were likely emplaced after the martian dynamo ceased, recent data from the InSight mission ...
M. Volk, R. Fu, A. Mittelholz, J. Day
semanticscholar   +1 more source

High-Resolution Environmental Magnetism Using the Quantum Diamond Microscope (QDM): Application to a Tropical Speleothem

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, Kimberly Hess, Plinio Jaqueto, Plinio Jaqueto, Valdir F. Novello, Tyler Kukla, Ricardo I. F. Trindade, Nicolás M. Stríkis, Francisco W. Cruz, Oren Ben Dor, Oren Ben Dor   +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, Karl Fabian, Lennart V. de Groot   +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, Ricardo I. F. Trindade, Joshua M. Feinberg, Janine Carmo, Valdir F. Novello, Nicolás M. Stríkis, Francisco W. Cruz, Marília H. Shimizu, Ivo Karmann   +8 more
doaj   +1 more source

Peak-ring magnetism: Rock and mineral magnetic properties of the Chicxulub impact crater

Geological Society of America Bulletin, 2023
The Chicxulub impact event at ca. 66 Ma left in its wake the only complex crater on Earth with a preserved peak ring, characterized by a well-developed magnetic anomaly low. To date, little is known about its magnetic properties.
B. D. L. Mendes, A. Kontny, Michael Polchau, L. Fischer, Ksenia Gaus, K. Dudzisz, B. Kuipers, M. Dekkers   +7 more
semanticscholar   +1 more source

AMS and rock magnetism in the Caviahue-Copahue Volcanic Complex (Southern Andes): emission center, flow dynamics, and implications to the emplacement of non-welded PDCs

Journal of Volcanology and Geothermal Research, 2021
Pyroclastic deposits can cover significant areas and register major geological events. Despite their importance, understanding depositional dynamics of pyroclastic density currents (PDCs) and linking explosive deposits to their emission centers is still ...
M. Haag, C. A. Sommer, J. Savian, A. Caselli, Thiago Ribas Moncinhatto, G. Hartmann, M. Ort, Wilbor Poletti, R. I. Ferreira da Trindade   +8 more
semanticscholar   +1 more source

Rock magnetism and soil magnetic susceptibility

AgroChemistry and Soil Science, 2021
Information support of modern agriculture and ecology forms a demand for ever higher requirements for efficiency and density of the sampling network.
O. Kruglov, S. Popov
semanticscholar   +1 more source