dor_id: 4133439

506.#.#.a: Público

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

510.0.#.a: Consejo Nacional de Ciencia y Tecnología (CONACyT); Scientific Electronic Library Online (SciELO); SCOPUS, Dialnet, Directory of Open Access Journals (DOAJ); Geobase

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

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

270.#.#.d: MX

270.1.#.d: México

590.#.#.b: Concentrador

883.#.#.u: https://revistas.unam.mx/catalogo/

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

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

856.4.0.u: http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/989/931

100.1.#.a: Nimz, G.J.; Cameron, K.L.; Cameron, M.; Morris, S.L.

524.#.#.a: Nimz, G.J., et al. (1986). The petrology of the lower crust and upper mantle beneath southeastern Chihuahua, Mexico: a progress report. Geofísica Internacional; Vol. 25 Núm. 1: Enero 1, 1986; 85-116. Recuperado de https://repositorio.unam.mx/contenidos/4133439

245.1.0.a: The petrology of the lower crust and upper mantle beneath southeastern Chihuahua, Mexico: a progress report

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

561.1.#.a: Instituto de Geofísica, UNAM

264.#.0.c: 1986

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

653.#.#.a: Petrología; Corteza Inferior; Manto Superior; Petrology; Lower Crust; Upper Mantle; Chihuahua-Mëxico

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/989

001.#.#.#: 063.oai:revistagi.geofisica.unam.mx:article/989

041.#.7.h: spa

520.3.#.a: Granulite facies metamorphic rocks and ultramafic nodules, of lower crustal and upper mantle origin, respectively, occur as xenoliths in a host alkali basalt at the La Olivina peridot mine, approximately 150 km southeast of Ciudad Chihuahua. Toe La Olivina ultramafic xenoliths are of three compositional groups that are distinguished by clinopyroxene chemistry: a high magnesian (Mg/Mgi-Fe= 0.90), high Cr2 03 group (Group I); a moderatelymagnesian (Mg/Mg+Fe= 0.76), high AI2O3, high TiO2 group (Group II); anda group compositionally intermediate between these two (Transitional Group ). Analyses of primary minerals show that these xenoliths are similar to ones from San Carlos, Arizona (USA), from Xalapasco de La Joya, San Luis Potosí (Mexico), and from Kilbourne Hale, New Mexico (USA). Toe La Olivina mantle xenoliths are of three textural groups: allotriomorphic ranular (igneous?), porphyroclastic (metamorphic?), and granoblastic (metamorphic?). All Group I xenoliths are granoblastic, and most nodules of Group II and the Transitional Group are allotriomorphic granular. Porphyroclastic texture is less common than the other textures in the rocks studied, but it is found in sorne Transitional Group rocks. Toe La Olivina lower crust xenoliths are predominantly pelitic gneisses and pyroxene granulites. Toe pelitic gneisses are uniform in mineral assemblage with garnet+ quartz+ plagioclase+ sanidine+ sillimanite+ rutile+ graphite. Most of the pyroxene granulites are plagioclase-bearing, but sorne contain scapolite in place of plagioclase. These lower crustal samples are identical in mineral assemblage and very similar in mineral chemistry to xenoliths described from Kilbourne Hale. The granulites and pelitic gneisses have model Nd ages of 1.1 to 1.2 b.y. using a chondritic initial ratio, or 1.6 b.y. using a depleted so urce model. Toe latter age is in excellent agreement with those from Kilbourne Hale. Thus it appears that Precambrian craton, similar in age, metamorphic history, and protolith composition to that which underlies Kilbourne Hale, extends into Mexico at least as far southeast as La Olivina.doi: https://doi.org/10.22201/igeof.00167169p.1986.25.1.802

773.1.#.t: Geofísica Internacional; Vol. 25 Núm. 1: Enero 1, 1986; 85-116

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

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

310.#.#.a: Trimestral

300.#.#.a: Páginas: 85-116

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

doi: https://doi.org/10.22201/igeof.00167169p.1986.25.1.802

handle: 00e9755e8467a477

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

856.#.0.q: application/pdf

file_creation_date: 2008-06-25 23:51:52.0

file_modification_date: 2022-07-11 18:37:46.0

file_creator: G.J. Nimz

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245.1.0.b: The petrology of the lower crust and upper mantle beneath southeastern Chihuahua, Mexico: a progress report

last_modified: 2023-06-20 16:00:00

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

license_type: by-nc-sa

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