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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Geophysical Research-Solid Earth

ISSN

2169-9313

e-ISSN

2169-9356

Svazek periodika

129

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

22

Strana od-do

e2023JB028606

Kód UT WoS článku

001285336900001

EID výsledku v databázi Scopus

2-s2.0-85200689423