Volcanic sequence in Late Triassic – Jurassicsiliciclastic and evaporitic rocks from Galeana, NE Mexico
In northeastern Mexico, volcanic rocks interbedded with Late Triassic–Jurassic siliciclastic and evaporitic strata have been linked to magmatic arcs developed in the Pangea western margin during its initial phase of fragmentation. This work provides new petrographic and geochemical data for volcani...
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| Format: | Article |
| Language: | English |
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Universitat de Barcelona (UB), Geociències Barcelona (Geo3BCN), Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDAEA), Universitat Autònoma de Barcelona (UAB)
2017-06-01
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| Series: | Geologica Acta |
| Subjects: | |
| Online Access: | https://revistes.ub.edu/index.php/GEOACTA/article/view/16988 |
| _version_ | 1797654599178387456 |
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| author | E.M. CRUZ-GÁMEZ F. VELASCO-TAPIA J.A. RAMÍREZ-FERNÁNDEZ U. JENCHEN P. RODRÍGUEZ-SAAVEDRA A.A. RODRÍGUEZ-DÍAZ A. IRIONDO |
| author_facet | E.M. CRUZ-GÁMEZ F. VELASCO-TAPIA J.A. RAMÍREZ-FERNÁNDEZ U. JENCHEN P. RODRÍGUEZ-SAAVEDRA A.A. RODRÍGUEZ-DÍAZ A. IRIONDO |
| author_sort | E.M. CRUZ-GÁMEZ |
| collection | DOAJ |
| description |
In northeastern Mexico, volcanic rocks interbedded with Late Triassic–Jurassic siliciclastic and evaporitic strata have been linked to magmatic arcs developed in the Pangea western margin during its initial phase of fragmentation. This work provides new petrographic and geochemical data for volcanism included in the El Alamar and Minas Viejas formations outcropping in the Galeana region. Andesitic dykes and sills (n= 10) in the El Alamar redbeds show SiO2= 47.5–59.1% and MgO= 1.2–4.2%, as well as a geochemical affinity to island arc magmas. This work represents the first report of this tectonic setting in the region. Geological and petrographic evidence suggest that this arc system likely developed after ~220 and before ~193Ma. Trachy-andesitic and rhyodacitic domes (n= 20) associated with the Minas Viejas gypsum-carbonates sequence show SiO2= 61.8–82.7% and MgO= 0.1–4.0% with a tectonic affinity to continental arc. A rhyodacite sample from this region has been dated by U-Pb in zircon, yielding an age of 149.4 ± 1.2Ma (n= 21), being the youngest age related to this arc. Finally, we propose a threestep model to explain the tectonic evolution from Late Triassic island arc to Jurassic continental arc system in the northeastern Mexico.
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| first_indexed | 2024-03-11T17:01:51Z |
| format | Article |
| id | doaj.art-f6727c4ea9204774a6fb3908642f2e18 |
| institution | Directory Open Access Journal |
| issn | 1696-5728 |
| language | English |
| last_indexed | 2024-03-11T17:01:51Z |
| publishDate | 2017-06-01 |
| publisher | Universitat de Barcelona (UB), Geociències Barcelona (Geo3BCN), Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDAEA), Universitat Autònoma de Barcelona (UAB) |
| record_format | Article |
| series | Geologica Acta |
| spelling | doaj.art-f6727c4ea9204774a6fb3908642f2e182023-10-20T07:24:34ZengUniversitat de Barcelona (UB), Geociències Barcelona (Geo3BCN), Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDAEA), Universitat Autònoma de Barcelona (UAB)Geologica Acta1696-57282017-06-01152Volcanic sequence in Late Triassic – Jurassicsiliciclastic and evaporitic rocks from Galeana, NE MexicoE.M. CRUZ-GÁMEZ0F. VELASCO-TAPIA1J.A. RAMÍREZ-FERNÁNDEZ2U. JENCHEN3P. RODRÍGUEZ-SAAVEDRA4A.A. RODRÍGUEZ-DÍAZ5A. IRIONDO6Universidad Autónoma de Nuevo León, Facultad de Ciencias de la Tierra Ex – Hacienda de Guadalupe, Carretera Linares – Cerro Prieto km. 8, Linares, Nuevo León67700, México.Universidad Autónoma de Nuevo León, Facultad de Ciencias de la Tierra Ex – Hacienda de Guadalupe, Carretera Linares – Cerro Prieto km. 8, Linares, Nuevo León67700, México.Universidad Autónoma de Nuevo León, Facultad de Ciencias de la Tierra Ex – Hacienda de Guadalupe, Carretera Linares – Cerro Prieto km. 8, Linares, Nuevo León67700, México.Universidad Autónoma de Nuevo León, Facultad de Ciencias de la Tierra Ex – Hacienda de Guadalupe, Carretera Linares – Cerro Prieto km. 8, Linares, Nuevo León67700, México.Universidad Autónoma de Nuevo León, Facultad de Ciencias de la Tierra Ex – Hacienda de Guadalupe, Carretera Linares – Cerro Prieto km. 8, Linares, Nuevo León67700, México.Universidad Nacional Autónoma de México, Instituto de Geofísica Ciudad Universitaria, Delegación Coyoacán, Ciudad de México, Distrito Federal 04510, MéxicoUniversidad Nacional Autónoma de México, Centro de Geociencias Blvd. Juriquilla No. 3001, Querétaro, Querétaro 76230, México In northeastern Mexico, volcanic rocks interbedded with Late Triassic–Jurassic siliciclastic and evaporitic strata have been linked to magmatic arcs developed in the Pangea western margin during its initial phase of fragmentation. This work provides new petrographic and geochemical data for volcanism included in the El Alamar and Minas Viejas formations outcropping in the Galeana region. Andesitic dykes and sills (n= 10) in the El Alamar redbeds show SiO2= 47.5–59.1% and MgO= 1.2–4.2%, as well as a geochemical affinity to island arc magmas. This work represents the first report of this tectonic setting in the region. Geological and petrographic evidence suggest that this arc system likely developed after ~220 and before ~193Ma. Trachy-andesitic and rhyodacitic domes (n= 20) associated with the Minas Viejas gypsum-carbonates sequence show SiO2= 61.8–82.7% and MgO= 0.1–4.0% with a tectonic affinity to continental arc. A rhyodacite sample from this region has been dated by U-Pb in zircon, yielding an age of 149.4 ± 1.2Ma (n= 21), being the youngest age related to this arc. Finally, we propose a threestep model to explain the tectonic evolution from Late Triassic island arc to Jurassic continental arc system in the northeastern Mexico. https://revistes.ub.edu/index.php/GEOACTA/article/view/16988Northeastern Mexicoisland arccontinental arcLate TriassicJurassic |
| spellingShingle | E.M. CRUZ-GÁMEZ F. VELASCO-TAPIA J.A. RAMÍREZ-FERNÁNDEZ U. JENCHEN P. RODRÍGUEZ-SAAVEDRA A.A. RODRÍGUEZ-DÍAZ A. IRIONDO Volcanic sequence in Late Triassic – Jurassicsiliciclastic and evaporitic rocks from Galeana, NE Mexico Geologica Acta Northeastern Mexico island arc continental arc Late Triassic Jurassic |
| title | Volcanic sequence in Late Triassic – Jurassicsiliciclastic and evaporitic rocks from Galeana, NE Mexico |
| title_full | Volcanic sequence in Late Triassic – Jurassicsiliciclastic and evaporitic rocks from Galeana, NE Mexico |
| title_fullStr | Volcanic sequence in Late Triassic – Jurassicsiliciclastic and evaporitic rocks from Galeana, NE Mexico |
| title_full_unstemmed | Volcanic sequence in Late Triassic – Jurassicsiliciclastic and evaporitic rocks from Galeana, NE Mexico |
| title_short | Volcanic sequence in Late Triassic – Jurassicsiliciclastic and evaporitic rocks from Galeana, NE Mexico |
| title_sort | volcanic sequence in late triassic jurassicsiliciclastic and evaporitic rocks from galeana ne mexico |
| topic | Northeastern Mexico island arc continental arc Late Triassic Jurassic |
| url | https://revistes.ub.edu/index.php/GEOACTA/article/view/16988 |
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