Postshock Thermally Induced Transformations in Experimentally Shocked Magnetite
Abstract
We studied the effect of 973 K heating in argon atmosphere on the magnetic and structural properties of a magnetite-bearing ore, which was previously exposed to laboratory shock waves between 5 and 30 GPa. For this purpose magnetic properties were studied using temperature-dependent magnetic susceptibility, magnetic hysteresis and low-temperature saturation isothermal remanent magnetization. Structural properties of magnetite were analyzed using X-ray diffraction, high-resolution scanning electron microscopy and synchrotron-assisted X-ray absorption spectroscopy. The shock-induced changes include magnetic domain size reduction due to brittle and ductile deformation features and an increase in Verwey transition temperature due to lattice distortion. After heating, the crystal lattice is relaxed and apparent crystallite size is increased suggesting a recovery of lattice defects documented by a mosaic recrystallization texture. The structural changes correlate with modifications in magnetic domain state recorded by temperature-dependent magnetic susceptibility, hysteresis properties and low-temperature saturation isothermal remanent magnetization. In conclusion, these alterations in both, magnetic and structural properties of magnetite can be used to assess impact-related magnetic anomalies in impact structures with a high temperature overprint.
- Authors:
-
[1];
[1];
- Karlsruhe Inst. of Technology (KIT) (Germany). Inst. of Applied Geosciences
- SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
- Karlsruhe Inst. of Technology (KIT), Eggenstein-Leopoldshafen (Germany). Synchrotron Radiation Facility ANKA
- Publication Date:
- Research Org.:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE; German Research Foundation (DFG)
- OSTI Identifier:
- 1461951
- Grant/Contract Number:
- AC02-76SF00515; KO1514/8-1
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Geochemistry, Geophysics, Geosystems
- Additional Journal Information:
- Journal Volume: 19; Journal Issue: 3; Journal ID: ISSN 1525-2027
- Publisher:
- American Geophysical Union
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 58 GEOSCIENCES; experimentally shocked magnetite; effect of annealing; magnetic properties; structural properties; large impact structures
Citation Formats
Kontny, A., Reznik, B., Boubnov, A., Gottlicher, J., and Steininger, R. Postshock Thermally Induced Transformations in Experimentally Shocked Magnetite. United States: N. p., 2018.
Web. doi:10.1002/2017gc007331.
Kontny, A., Reznik, B., Boubnov, A., Gottlicher, J., & Steininger, R. Postshock Thermally Induced Transformations in Experimentally Shocked Magnetite. United States. https://doi.org/10.1002/2017gc007331
Kontny, A., Reznik, B., Boubnov, A., Gottlicher, J., and Steininger, R. Mon .
"Postshock Thermally Induced Transformations in Experimentally Shocked Magnetite". United States. https://doi.org/10.1002/2017gc007331. https://www.osti.gov/servlets/purl/1461951.
@article{osti_1461951,
title = {Postshock Thermally Induced Transformations in Experimentally Shocked Magnetite},
author = {Kontny, A. and Reznik, B. and Boubnov, A. and Gottlicher, J. and Steininger, R.},
abstractNote = {We studied the effect of 973 K heating in argon atmosphere on the magnetic and structural properties of a magnetite-bearing ore, which was previously exposed to laboratory shock waves between 5 and 30 GPa. For this purpose magnetic properties were studied using temperature-dependent magnetic susceptibility, magnetic hysteresis and low-temperature saturation isothermal remanent magnetization. Structural properties of magnetite were analyzed using X-ray diffraction, high-resolution scanning electron microscopy and synchrotron-assisted X-ray absorption spectroscopy. The shock-induced changes include magnetic domain size reduction due to brittle and ductile deformation features and an increase in Verwey transition temperature due to lattice distortion. After heating, the crystal lattice is relaxed and apparent crystallite size is increased suggesting a recovery of lattice defects documented by a mosaic recrystallization texture. The structural changes correlate with modifications in magnetic domain state recorded by temperature-dependent magnetic susceptibility, hysteresis properties and low-temperature saturation isothermal remanent magnetization. In conclusion, these alterations in both, magnetic and structural properties of magnetite can be used to assess impact-related magnetic anomalies in impact structures with a high temperature overprint.},
doi = {10.1002/2017gc007331},
journal = {Geochemistry, Geophysics, Geosystems},
number = 3,
volume = 19,
place = {United States},
year = {Mon Mar 12 00:00:00 EDT 2018},
month = {Mon Mar 12 00:00:00 EDT 2018}
}
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Cited by: 9 works
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Figures / Tables:
Figure 1: Effect of shock pressure and subsequent heating on Verwey transition (TV) and Curie point (TC). (a) Curves of an initial, “0 GPa” sample. Note that the heating (black) and cooling (grey) curves are nearly reversible. (b) Representative irreversible curves for a shocked sample. Curves are normalized to susceptibilitymore »
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Works referencing / citing this record:
Shock-induced formation of wüstite and fayalite in a magnetite-quartz target rock
text, January 2019
- Henrichs, Leonard F.; Kontny, Agnes; Reznik, Boris
- FID GEO
The effects of dislocations on crystallographic twins and domain wall motion in magnetite at the Verwey transition
collection, January 2019
- Lindquist, Anna K.; Feinberg, Joshua M.; Harrison, Richard J.
- Apollo - University of Cambridge Repository
The effects of dislocations on crystallographic twins and domain wall motion in magnetite at the Verwey transition
journal, January 2019
- Lindquist, Anna K.; Feinberg, Joshua M.; Harrison, Richard J.
- Earth, Planets and Space, Vol. 71, Issue 1
Shock‐induced formation of wüstite and fayalite in a magnetite‐quartz target rock
journal, December 2019
- Henrichs, Leonard F.; Kontny, Agnes; Reznik, Boris
- Meteoritics & Planetary Science, Vol. 55, Issue 1
Shock‐induced formation of wüstite and fayalite in a magnetite‐quartz target rock
text, January 2020
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- Wiley
The influence of strain on the Verwey transition as a function of dopant concentration: towards a geobarometer for magnetite-bearing rocks
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text, January 2019
- Lindquist, Anna K.; Feinberg, Joshua M.; Harrison, Richard
- Apollo - University of Cambridge Repository
The effects of dislocations on crystallographic twins and domain wall motion in magnetite at the Verwey transition
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Figures / Tables found in this record:
Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.