dor_id: 42570

506.#.#.a: Público

590.#.#.d: Cada artículo es evaluado mediante una revisión ciega única. Los revisores son externos nacionales e internacionales.

510.0.#.a: Consejo Nacional de Ciencia y Tecnología (CONACyT), Sistema Regional de Información en Línea para Revistas Científicas de América Latina, el Caribe, España y Portugal (Latindex), Scientific Electronic Library Online (SciELO), SCOPUS, Web Of Science (WoS)

561.#.#.u: http://www.geofisica.unam.mx/

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

336.#.#.b: info:eu-repo/semantics/article

336.#.#.3: Artículo de Investigación

336.#.#.a: Artículo

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

351.#.#.b: Geofísica Internacional

351.#.#.a: Artículos

harvesting_group: RevistasUNAM

270.1.#.p: Revistas UNAM. Dirección General de Publicaciones y Fomento Editorial, UNAM en revistas@unam.mx

590.#.#.c: Open Journal Systems (OJS)

270.#.#.d: MX

270.1.#.d: México

590.#.#.b: Concentrador

883.#.#.u: http://www.revistas.unam.mx/front/

883.#.#.a: Revistas UNAM

590.#.#.a: Coordinación de Difusión Cultural

883.#.#.1: https://www.publicaciones.unam.mx/

883.#.#.q: Dirección General de Publicaciones y Fomento Editorial, UNAM

850.#.#.a: Universidad Nacional Autónoma de México

856.4.0.u: http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/609/592

100.1.#.a: Connor, Charles B.; Lane, Sammantha B.; Clement, Bradford M.

524.#.#.a: Connor, Charles B., et al. (1993). Structure and thermal characteristics of the Summit dome, March 1990 - March, 1991: Volcán Colima, Mexico. Geofísica Internacional; Vol. 32 No. 4, 1993. Recuperado de https://repositorio.unam.mx/contenidos/42570

245.1.0.a: Structure and thermal characteristics of the Summit dome, March 1990 - March, 1991: Volcán Colima, Mexico.

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

561.1.#.a: Instituto de Geofísica, UNAM

264.#.0.c: 1993

264.#.1.c: 2013-06-10

653.#.#.a: Dome; temperature; fumarole field; magnetism; graben.; Domo; temperatura; fumarolas; magnetismo; graben.

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, fecha de asignación de la licencia 2013-06-10, para un uso diferente consultar al responsable jurídico del repositorio por medio de revistagi@igeofisica.unam.mx

884.#.#.k: http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/609

001.#.#.#: oai:ojs.ojs.geofisica.unam.mx:article/609

041.#.7.h: spa

520.3.#.a: A new exogeneous dome lobe erupted on the summit lava dome of Volcán Colima, Mexico, carly in March, 1991. Within the first day of eruptive activity the new dome lobe grew to a volume of approximately 2,200 m3, was circular in shape, had a diameter of about 20 m and a height of approximately 6.5 m. This dome lobe was surrounded by a shallow moat, from which degassing was intense. Radial fractures extended from the dome lobe, indicating that principal horizontal compressional stresses were oriented radial to the dome at the time of extrusion. The most prominent faulting resulted in the formation of a small graben, approximately 20 m in width and bounded by scarps with 3 m to 5 m of vertical displacement, extending NNW of the new dome lobe. Geophysical observations made on the summit lava dome throughout 19990 indicate that the initial extrusion of this dome lobe was controlled by a pre-existing structure. The dome lobe extruded approximately 30 m south of the only high-temperature (350-375°C) fumaroles field occurring on the summit dome during 1990. Four fumaroles monitored during March, May and December, 1990, degassed in a steady-state from this field throughout 1990 at low mass flows. Little change in mean fumaroles temperatures occurred during this period. Ground magnetic observations collected in December, 1990, along a traverse across this high-temperature fumaroles field reveal a short-wavelength, -2000nT magnetic anomaly, nearly centered on the fumaroles field. Summit dome rocks have comparatively low magnetic susceptibilities (8.42x10-6-8.06x10-5 mass-corrected SI) and high remanent magnetizations (1.08-5.57 A/m). Our model of the magnetic data, incorporating the rock magnetic anomaly was a small, shallow body of rock which was heated by the ascending fumaroles gases to above the NRM unblocking temperatures of summit dome rocks. This body of hot rock was elongated in a NNW direction and coincides exactly with the eastern scarp of the graben formed during the initial extrusion of the March, 1991 dome lobe. Application of a numerical heat and mass transfer model suggest that fumaroles degassing in a steady-state and low mass flow from a shallow, volatile-depleted magma, will create a thermal anomaly similar to that deduced from the magnetic model. Rock-avalanching from high on the flanks of the volcano is also most intense along the northern and southern extensions if the graben. The coincidence of these structural and thermal features suggest that the NNW-trending graben formed during 1991 activity is the surface manifestation of a major structure transecting the upper edifice of the volcano, along which additional deformation may occur in the future.

773.1.#.t: Geofísica Internacional; Vol. 32 No. 4 (1993)

773.1.#.o: http://revistagi.geofisica.unam.mx/index.php/RGI

046.#.#.j: 2020-10-20 00:00:00.000000

022.#.#.a: 0016-7169

310.#.#.a: Trimestral

264.#.1.b: Instituto de Geofísica, UNAM

758.#.#.1: http://revistagi.geofisica.unam.mx/index.php/RGI

handle: 00a882d2ad4b8259

harvesting_date: 2020-09-23 00:00:00.0

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file_modification_date: 2014-12-23 15:10:37.0

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license_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode.es

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Artículo

Structure and thermal characteristics of the Summit dome, March 1990 - March, 1991: Volcán Colima, Mexico.

Connor, Charles B.; Lane, Sammantha B.; Clement, Bradford M.

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

Connor, Charles B., et al. (1993). Structure and thermal characteristics of the Summit dome, March 1990 - March, 1991: Volcán Colima, Mexico. Geofísica Internacional; Vol. 32 No. 4, 1993. Recuperado de https://repositorio.unam.mx/contenidos/42570

Descripción del recurso

Autor(es)
Connor, Charles B.; Lane, Sammantha B.; Clement, Bradford M.
Tipo
Artículo de Investigación
Área del conocimiento
Físico Matemáticas y Ciencias de la Tierra
Título
Structure and thermal characteristics of the Summit dome, March 1990 - March, 1991: Volcán Colima, Mexico.
Fecha
2013-06-10
Resumen
A new exogeneous dome lobe erupted on the summit lava dome of Volcán Colima, Mexico, carly in March, 1991. Within the first day of eruptive activity the new dome lobe grew to a volume of approximately 2,200 m3, was circular in shape, had a diameter of about 20 m and a height of approximately 6.5 m. This dome lobe was surrounded by a shallow moat, from which degassing was intense. Radial fractures extended from the dome lobe, indicating that principal horizontal compressional stresses were oriented radial to the dome at the time of extrusion. The most prominent faulting resulted in the formation of a small graben, approximately 20 m in width and bounded by scarps with 3 m to 5 m of vertical displacement, extending NNW of the new dome lobe. Geophysical observations made on the summit lava dome throughout 19990 indicate that the initial extrusion of this dome lobe was controlled by a pre-existing structure. The dome lobe extruded approximately 30 m south of the only high-temperature (350-375°C) fumaroles field occurring on the summit dome during 1990. Four fumaroles monitored during March, May and December, 1990, degassed in a steady-state from this field throughout 1990 at low mass flows. Little change in mean fumaroles temperatures occurred during this period. Ground magnetic observations collected in December, 1990, along a traverse across this high-temperature fumaroles field reveal a short-wavelength, -2000nT magnetic anomaly, nearly centered on the fumaroles field. Summit dome rocks have comparatively low magnetic susceptibilities (8.42x10-6-8.06x10-5 mass-corrected SI) and high remanent magnetizations (1.08-5.57 A/m). Our model of the magnetic data, incorporating the rock magnetic anomaly was a small, shallow body of rock which was heated by the ascending fumaroles gases to above the NRM unblocking temperatures of summit dome rocks. This body of hot rock was elongated in a NNW direction and coincides exactly with the eastern scarp of the graben formed during the initial extrusion of the March, 1991 dome lobe. Application of a numerical heat and mass transfer model suggest that fumaroles degassing in a steady-state and low mass flow from a shallow, volatile-depleted magma, will create a thermal anomaly similar to that deduced from the magnetic model. Rock-avalanching from high on the flanks of the volcano is also most intense along the northern and southern extensions if the graben. The coincidence of these structural and thermal features suggest that the NNW-trending graben formed during 1991 activity is the surface manifestation of a major structure transecting the upper edifice of the volcano, along which additional deformation may occur in the future.
Tema
Dome; temperature; fumarole field; magnetism; graben.; Domo; temperatura; fumarolas; magnetismo; graben.
Idioma
spa
ISSN
0016-7169

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