dor_id: 4132826

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590.#.#.d: Los artículos enviados a la revista "Geofísica Internacional", se juzgan por medio de un proceso de revisión por pares

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650.#.4.x: Físico Matemáticas y Ciencias de la Tierra

336.#.#.b: article

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336.#.#.a: Artículo

351.#.#.6: http://revistagi.geofisica.unam.mx/index.php/RGI

351.#.#.b: Geofísica Internacional

351.#.#.a: Artículos

harvesting_group: RevistasUNAM

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100.1.#.a: Urrutia Fucugauchi, J.

524.#.#.a: Urrutia Fucugauchi, J. (1973). A parameter for estimating the degree of magnetic susceptibility anisotropy. Geofísica Internacional; Vol. 18 Núm. 3: Julio 1, 1979; 309-320. Recuperado de https://repositorio.unam.mx/contenidos/4132826

245.1.0.a: A parameter for estimating the degree of magnetic susceptibility anisotropy

502.#.#.c: Universidad Nacional Autónoma de México

561.1.#.a: Instituto de Geofísica, UNAM

264.#.0.c: 1973

264.#.1.c: 1979-07-01

653.#.#.a: Anisotropía; Prolatos y oblatos; Grado de susceptibilidad magnética anisotropía; Isotropía; Elipsoide; Anisotropy; Prolates and Oblates; Degree of magnetic susceptibility anisotropy; Isotropy; Ellipsoid

506.1.#.a: La titularidad de los derechos patrimoniales de esta obra pertenece a las instituciones editoras. Su uso se rige por una licencia Creative Commons BY-NC-ND 4.0 Internacional, https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode.es, para un uso diferente consultar al responsable jurídico del repositorio por medio del correo electrónico revistagi@igeofisica.unam.mx

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041.#.7.h: spa

520.3.#.a: Confusion has existed in the literature over the use of the term "degree of magnetic susceptibility anisotropy". Previous parameters proposed as estimators of the anisotropy degree have no physical basis, and their motivation has been mainly operational. The low-field susceptibility can be approximated by a symmetric tensor of second rank. The tensor for isotropic susceptibility is represented as a sphere and for anisotropic susceptibility as an ellipsoid. The anisotropy degree therefore increases as the ellipsoid departes from sphericity. Thus, it seems logical that the degree of anisotropy can be estimated from the degree of departure from sphericity and measured by comparing the ellipsoids (anisotropy) with the sphere (isotropy). For this purpose we define a parameter based on the argument that solids of equal surface areas but of different volumes have different shapes and express it as the ratio of the volume of a sphere, of the same surface areas as the ellipsoid, to the volume of the ellipsoid. Simple expressions for estimating the anisotropy degree for the cases of oblate spheroids are derived. Finally, approximate expressions for estimating the degree of magnetic susceptibility anisotropy of rocks are proposed.doi: https://doi.org/10.22201/igeof.00167169p.1979.18.3.941

773.1.#.t: Geofísica Internacional; Vol. 18 Núm. 3: Julio 1, 1979; 309-320

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022.#.#.a: ISSN-L: 2954-436X; ISSN impreso: 0016-7169

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300.#.#.a: Páginas: 309-320

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doi: https://doi.org/10.22201/igeof.00167169p.1979.18.3.941

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245.1.0.b: A parameter for estimating the degree of magnetic susceptibility anisotropy

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Artículo

A parameter for estimating the degree of magnetic susceptibility anisotropy

Urrutia Fucugauchi, J.

Instituto de Geofísica, UNAM, publicado en Geofísica Internacional, y cosechado de Revistas UNAM

Licencia de uso

Procedencia del contenido

Entidad o dependencia
Instituto de Geofísica, UNAM
Revista
Repositorio
Contacto
Revistas UNAM. Dirección General de Publicaciones y Fomento Editorial, UNAM en revistas@unam.mx

Cita

Urrutia Fucugauchi, J. (1973). A parameter for estimating the degree of magnetic susceptibility anisotropy. Geofísica Internacional; Vol. 18 Núm. 3: Julio 1, 1979; 309-320. Recuperado de https://repositorio.unam.mx/contenidos/4132826

Descripción del recurso

Autor(es)
Urrutia Fucugauchi, J.
Tipo
Artículo de Investigación
Área del conocimiento
Físico Matemáticas y Ciencias de la Tierra
Título
A parameter for estimating the degree of magnetic susceptibility anisotropy
Fecha
1979-07-01
Resumen
Confusion has existed in the literature over the use of the term "degree of magnetic susceptibility anisotropy". Previous parameters proposed as estimators of the anisotropy degree have no physical basis, and their motivation has been mainly operational. The low-field susceptibility can be approximated by a symmetric tensor of second rank. The tensor for isotropic susceptibility is represented as a sphere and for anisotropic susceptibility as an ellipsoid. The anisotropy degree therefore increases as the ellipsoid departes from sphericity. Thus, it seems logical that the degree of anisotropy can be estimated from the degree of departure from sphericity and measured by comparing the ellipsoids (anisotropy) with the sphere (isotropy). For this purpose we define a parameter based on the argument that solids of equal surface areas but of different volumes have different shapes and express it as the ratio of the volume of a sphere, of the same surface areas as the ellipsoid, to the volume of the ellipsoid. Simple expressions for estimating the anisotropy degree for the cases of oblate spheroids are derived. Finally, approximate expressions for estimating the degree of magnetic susceptibility anisotropy of rocks are proposed.doi: https://doi.org/10.22201/igeof.00167169p.1979.18.3.941
Tema
Anisotropía; Prolatos y oblatos; Grado de susceptibilidad magnética anisotropía; Isotropía; Elipsoide; Anisotropy; Prolates and Oblates; Degree of magnetic susceptibility anisotropy; Isotropy; Ellipsoid
Idioma
spa
ISSN
ISSN-L: 2954-436X; ISSN impreso: 0016-7169

Enlaces