Demagnetization of Ordinary Chondrites under Hydrostatic Pressure up to 1.8 GPa

We present here the results of hydrostatic pressure demagnetization experiments up to 1.8 GPa on LL, L and H ordinary chondrites—the most common type of meteorites with Fe-Ni alloys being the main magnetic carrier. We used a non-magnetic high-pressure cell of piston-cylinder type made of “Russian” a...

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Bibliographic Details
Published in:Geochemistry international 2022-05, Vol.60 (5), p.421-429
Main Authors: Bezaeva, N. S., Gattacceca, J., Rochette, P., Sadykov, R. A.
Format: Article
Language:English
Subjects:
Alloys
Chondrites
Coercivity
Cylinders
Decompression
Demagnetization
Earth and Environmental Science
Earth Sciences
Extraterrestrial materials
Ferrous alloys
Geochemistry
Geophysics
Heavy metals
Hydrostatic pressure
Iron
Magnetic field
Magnetic fields
Magnetic properties
Magnetism
Magnetization
Metamorphism
Meteorites
Minerals
Nickel
Palaeomagnetism
Paleomagnetism
Pressure
Pressure cells
Remanence
Remanent magnetization
Saturation
Sciences of the Universe
Shock metamorphism
Water hardness
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Summary:We present here the results of hydrostatic pressure demagnetization experiments up to 1.8 GPa on LL, L and H ordinary chondrites—the most common type of meteorites with Fe-Ni alloys being the main magnetic carrier. We used a non-magnetic high-pressure cell of piston-cylinder type made of “Russian” alloy (NiCrAl) together with a liquid pressure transmitting medium PES-1 (polyethylsiloxane) to ensure purely hydrostatic pressure. This technique allowed measuring magnetic remanence of investigated samples directly under pressure as well as upon decompression. Pressure was always applied in near-zero magnetic field ( 80 mT, i.e. whose main metal phase is tetrataenite (Fe 0.5 Ni 0.5 ). This study gives an overview of pressure sensitivity of ordinary chondrites up to 1.8 GPa and has implications for extraterrestrial paleomagnetism as it can help to interpret remanent magnetization of ordinary chondrites that suffered shock metamorphism processes.
ISSN:0016-7029
1556-1968
DOI:10.1134/S0016702922050032