Strongly Negative Low-Field Variation of Magnetic Susceptibility: Rock Magnetic Character of the Basement-Cover Interface of Northeastern Oklahoma

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F24%3A00597996" target="_blank" >RIV/67985831:_____/24:00597996 - isvavai.cz</a>
Result on the web
<a href="https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2023JB028606" target="_blank" >https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2023JB028606</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1029/2023JB028606" target="_blank" >10.1029/2023JB028606</a>

Result language
angličtina
Original language name
Strongly Negative Low-Field Variation of Magnetic Susceptibility: Rock Magnetic Character of the Basement-Cover Interface of Northeastern Oklahoma
Original language description
Some rock and soil samples exhibit significant loss of magnetic susceptibility (χ) with increasing applied field amplitude even at relatively low (10–100s of A/m) fields, a behavior which remains unexplained. Exceptionally strong negative field-dependence of susceptibility (χHD) is present in sandstones and altered intermediate-felsic igneous rocks in several cores from the northeastern Oklahoma subsurface. These same rocks also show elevated frequency-dependence of susceptibility (χFD), with reasonable correlation of χHD to χFD, and frequency-dependent χHD. Results from multiple characterization methods indicate that strongly negative χHD in these rocks is linked to a yet-unidentified phase which begins the approach to magnetic saturation in low fields (<1 mT/800 A/m), shows elevated χFD to low temperatures, is unstable at high temperatures, possesses significant anisotropy of magnetic susceptibility, and becomes paramagnetic above ∼83°C. Clear associations with fluid alteration features indicate that this material may be highly relevant to rock alteration, diagenetic, and environmental studies.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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