IGEBA   23946
INSTITUTO DE GEOCIENCIAS BASICAS, APLICADAS Y AMBIENTALES DE BUENOS AIRES
Unidad Ejecutora - UE
artículos
Título:
Simple hysteresis loop model for rock magnetic analysis
Autor/es:
FAZZITO, SABRINA; VASQUEZ, CARLOS A.
Revista:
STUDIA GEOPHYSICA ET GEODAETICA
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 2020 vol. 64 p. 114 - 129
ISSN:
0039-3169
Resumen:
A simple phenomenological model founded on Lorentzian functions is evaluated on thefirst derivative of magnetic hysteresis loops from several artificial samples with ironoxide/oxyhydroxide mixtures imitating natural sediments. The approach, which shows thathysteresis loops can be described by elementary analytical functions and providesestimates of magnetization parameters to a satisfactory degree of confidence, is appliedwith the help of standard data analysis software. Distorted hysteresis loops (waspwaisted,goose-necked and pot-bellied shaped) from simulations and artificial samplesfrom a previous work are reproduced by the model which allows to straightforwardlyunmix the ferromagnetic signal from different minerals like magnetite, greigite, haematiteand goethite. The analyses reveal that the contribution from the ferrimagnetic fraction,though present in a minor concentration ( 2.15 wt%), dominates the magnetization.