dor_id: 4132872

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

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

336.#.#.b: 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

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270.1.#.d: México

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883.#.#.a: Revistas UNAM

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

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

856.4.0.u: http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/1072/1004

100.1.#.a: Delgado Argote, L. A.; Rubinovich Cogan, R.; Gasca Durán, A.

524.#.#.a: Delgado Argote, L. A., et al. (1986). Descripción preliminar de la geología y mecánica de emplazamiento del complejo ultrabásico del cretácico de Loma Baya, Guerrero, México.. Geofísica Internacional; Vol. 25 Núm. 4: Octubre 1, 1986; 537-558. Recuperado de https://repositorio.unam.mx/contenidos/4132872

245.1.0.a: Descripción preliminar de la geología y mecánica de emplazamiento del complejo ultrabásico del cretácico de Loma Baya, Guerrero, México.

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

561.1.#.a: Instituto de Geofísica, UNAM

264.#.0.c: 1986

264.#.1.c: 1986-10-01

653.#.#.a: Geología; Mecánica de emplazamiento; Ultrabasico del retácito; Guerrero-México; Geology; Emplacement Mechanics; Retacit Ultrabasic; Guerrero-Mexico

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-SA 4.0 Internacional, https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode.es, para un uso diferente consultar al responsable jurídico del repositorio por medio del correo electrónico revistagi@igeofisica.unam.mx

884.#.#.k: http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/1072

001.#.#.#: 063.oai:revistagi.geofisica.unam.mx:article/1072

041.#.7.h: spa

520.3.#.a: In Papanoa, the coast of Guerrero cuts across a Mid-Cretaceous magmatic belt, within which four mafic-ultramafic complexes are emplaced. One of them is the Loma Baya complex. It covers an area of O. 75 km2 and intrudes volcanic and hypabysal rocks of mainly intermedia te composition. In order of abundance the ultramafic intrusive is formed by olivine clinopyroxenites, wehrlites, clinopyroxenites, dunites, minor hornblende pegmatites and chromitites. Olivine averages Fo 90 and clinopyroxenes are diopside and diopsidic augi.te. Orthopyroxenes are virtually absent in the whole sequence. Chemically, the ultramafic suite is richer in FeO than ophiolitic suites and calk-alkalic cordilleran intrusives from western Unites States, Canada and Alaska. Microprobe analyses revealed various oxides, sorne of which were identified as seudostratified primary magnetite and ferrochromite, as well as secondary magnetite, formed during the serpentinization process. The former ones clearly differ from the primary oxides because their Si02 and MgO contents are higher, between 8 to 20°/o and 14 to 24%, respectively. With respect to other localities, massive chromites show higher Mg content and lower Cr. Main structural features such as foliation and internal brecciation show a vertical tendency averaging 73%. The whole complex seems to be emplaced following a N-04 E plane, dipping 53°/o W. It is considered that the ultramafic emplacement took place during the Upper Cretaceous through a diapiric mechanism. The forced intrusión of the complex is explained as a result ofvolume increase (30%?) anda density loss approximate to one third of the ultramafic mass during the serpentinization.doi: https://doi.org/10.22201/igeof.00167169p.1986.25.4.777

773.1.#.t: Geofísica Internacional; Vol. 25 Núm. 4: Octubre 1, 1986; 537-558

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

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

doi: https://doi.org/10.22201/igeof.00167169p.1986.25.4.777

handle: 00924a2968d3cc4f

harvesting_date: 2023-06-20 16:00:00.0

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file_modification_date: 2022-07-13 14:36:27.0

file_creator: L.A. Delgado-Argote

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245.1.0.b: Descripción preliminar de la geología y mecánica de emplazamiento del complejo ultrabásico del cretácico de Loma Baya, Guerrero, México

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Artículo

Descripción preliminar de la geología y mecánica de emplazamiento del complejo ultrabásico del cretácico de Loma Baya, Guerrero, México.

Delgado Argote, L. A.; Rubinovich Cogan, R.; Gasca Durán, A.

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

Delgado Argote, L. A., et al. (1986). Descripción preliminar de la geología y mecánica de emplazamiento del complejo ultrabásico del cretácico de Loma Baya, Guerrero, México.. Geofísica Internacional; Vol. 25 Núm. 4: Octubre 1, 1986; 537-558. Recuperado de https://repositorio.unam.mx/contenidos/4132872

Descripción del recurso

Autor(es)
Delgado Argote, L. A.; Rubinovich Cogan, R.; Gasca Durán, A.
Tipo
Artículo de Investigación
Área del conocimiento
Físico Matemáticas y Ciencias de la Tierra
Título
Descripción preliminar de la geología y mecánica de emplazamiento del complejo ultrabásico del cretácico de Loma Baya, Guerrero, México.
Fecha
1986-10-01
Resumen
In Papanoa, the coast of Guerrero cuts across a Mid-Cretaceous magmatic belt, within which four mafic-ultramafic complexes are emplaced. One of them is the Loma Baya complex. It covers an area of O. 75 km2 and intrudes volcanic and hypabysal rocks of mainly intermedia te composition. In order of abundance the ultramafic intrusive is formed by olivine clinopyroxenites, wehrlites, clinopyroxenites, dunites, minor hornblende pegmatites and chromitites. Olivine averages Fo 90 and clinopyroxenes are diopside and diopsidic augi.te. Orthopyroxenes are virtually absent in the whole sequence. Chemically, the ultramafic suite is richer in FeO than ophiolitic suites and calk-alkalic cordilleran intrusives from western Unites States, Canada and Alaska. Microprobe analyses revealed various oxides, sorne of which were identified as seudostratified primary magnetite and ferrochromite, as well as secondary magnetite, formed during the serpentinization process. The former ones clearly differ from the primary oxides because their Si02 and MgO contents are higher, between 8 to 20°/o and 14 to 24%, respectively. With respect to other localities, massive chromites show higher Mg content and lower Cr. Main structural features such as foliation and internal brecciation show a vertical tendency averaging 73%. The whole complex seems to be emplaced following a N-04 E plane, dipping 53°/o W. It is considered that the ultramafic emplacement took place during the Upper Cretaceous through a diapiric mechanism. The forced intrusión of the complex is explained as a result ofvolume increase (30%?) anda density loss approximate to one third of the ultramafic mass during the serpentinization.doi: https://doi.org/10.22201/igeof.00167169p.1986.25.4.777
Tema
Geología; Mecánica de emplazamiento; Ultrabasico del retácito; Guerrero-México; Geology; Emplacement Mechanics; Retacit Ultrabasic; Guerrero-Mexico
Idioma
spa
ISSN
ISSN-L: 2954-436X; ISSN impreso: 0016-7169

Enlaces