Geochemistry and petrogenesis of extension-related magmas close to the volcanic front of the Central part of the trans-mexican volcanic belt
New geochemical data for 23 samples from the Sierra de Chichinautzin (SCN) and Sierra Santa Catarina (SSC) located at the volcanic front of the central part of the Trans-Mexican Volcanic Belt were combined with the published data on 580 samples from the SCN to explore the origin and evolution of the...
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| Formato: | Artículo |
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Dr. James Kellog
2016
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| _version_ | 1824413407367921664 |
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| author | Verma, Surendra P. Torres Sánchez, Darío Velasco Tapia, Fernando Subramanyam, K.S.V. Manikyamba, Chakravadhanula Bhutani, R. |
| author_facet | Verma, Surendra P. Torres Sánchez, Darío Velasco Tapia, Fernando Subramanyam, K.S.V. Manikyamba, Chakravadhanula Bhutani, R. |
| author_sort | Verma, Surendra P. |
| collection | Repositorio Institucional |
| description | New geochemical data for 23 samples from the Sierra de Chichinautzin (SCN) and Sierra Santa Catarina (SSC) located at the volcanic front of the central part of the Trans-Mexican Volcanic Belt were combined with the published data on 580 samples from the SCN to explore the origin and evolution of the Qua- ternary trachybasalt and basalt to andesite and dacite. The rare-earth element concentrations for the evolved intermediate and acid rocks are lower than those for the more basic varieties, implying that the evolved magmas cannot be generated by a simple fractional crystallisation process without crustal assimilation. The size of the Nb and Ta negative anomalies increases from basic to acid, which is similar to the behaviour of most continental rifts and extension-related areas, but contrasts from all island and continental arcs. The multidimensional tectonomagmatic diagrams indicate a continental rift setting from basic and alkaline intermediate magmas. The SSC represents a new site of within-plate alkaline magmas discovered in this work, which complements the earlier interpretation of the adjacent SCN as a manifestation of continental rift or extension-related magmatism. |
| format | Article |
| id | eprints-11628 |
| institution | UANL |
| publishDate | 2016 |
| publisher | Dr. James Kellog |
| record_format | eprints |
| spelling | eprints-116282018-10-22T16:50:05Z http://eprints.uanl.mx/11628/ Geochemistry and petrogenesis of extension-related magmas close to the volcanic front of the Central part of the trans-mexican volcanic belt Verma, Surendra P. Torres Sánchez, Darío Velasco Tapia, Fernando Subramanyam, K.S.V. Manikyamba, Chakravadhanula Bhutani, R. QE Geología New geochemical data for 23 samples from the Sierra de Chichinautzin (SCN) and Sierra Santa Catarina (SSC) located at the volcanic front of the central part of the Trans-Mexican Volcanic Belt were combined with the published data on 580 samples from the SCN to explore the origin and evolution of the Qua- ternary trachybasalt and basalt to andesite and dacite. The rare-earth element concentrations for the evolved intermediate and acid rocks are lower than those for the more basic varieties, implying that the evolved magmas cannot be generated by a simple fractional crystallisation process without crustal assimilation. The size of the Nb and Ta negative anomalies increases from basic to acid, which is similar to the behaviour of most continental rifts and extension-related areas, but contrasts from all island and continental arcs. The multidimensional tectonomagmatic diagrams indicate a continental rift setting from basic and alkaline intermediate magmas. The SSC represents a new site of within-plate alkaline magmas discovered in this work, which complements the earlier interpretation of the adjacent SCN as a manifestation of continental rift or extension-related magmatism. Dr. James Kellog 2016-08-16 Article PeerReviewed Verma, Surendra P. y Torres Sánchez, Darío y Velasco Tapia, Fernando y Subramanyam, K.S.V. y Manikyamba, Chakravadhanula y Bhutani, R. (2016) Geochemistry and petrogenesis of extension-related magmas close to the volcanic front of the Central part of the trans-mexican volcanic belt. Journal of South American Earth Sciences, 72. pp. 126-136. ISSN 0895-9811 http://www.journals.elsevier.com/journal-of-south-american-earth-sciences http://dx.doi.org/10.1016/j.jsames.2016.08.006 |
| spellingShingle | QE Geología Verma, Surendra P. Torres Sánchez, Darío Velasco Tapia, Fernando Subramanyam, K.S.V. Manikyamba, Chakravadhanula Bhutani, R. Geochemistry and petrogenesis of extension-related magmas close to the volcanic front of the Central part of the trans-mexican volcanic belt |
| thumbnail | https://rediab.uanl.mx/themes/sandal5/images/online.png |
| title | Geochemistry and petrogenesis of extension-related magmas close to the volcanic front of the Central part of the trans-mexican volcanic belt |
| title_full | Geochemistry and petrogenesis of extension-related magmas close to the volcanic front of the Central part of the trans-mexican volcanic belt |
| title_fullStr | Geochemistry and petrogenesis of extension-related magmas close to the volcanic front of the Central part of the trans-mexican volcanic belt |
| title_full_unstemmed | Geochemistry and petrogenesis of extension-related magmas close to the volcanic front of the Central part of the trans-mexican volcanic belt |
| title_short | Geochemistry and petrogenesis of extension-related magmas close to the volcanic front of the Central part of the trans-mexican volcanic belt |
| title_sort | geochemistry and petrogenesis of extension related magmas close to the volcanic front of the central part of the trans mexican volcanic belt |
| topic | QE Geología |
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