Laramide to Miocene syn-extensional plutonism in the Puerta del Sol area, central Sonora, Mexico
Plutonic rocks of the Puerta del Sol area, in central Sonora, represent the extension to the south of the El Jaralito batholith, and are part of the footwall of the Sierra Mazatán metamorphic core complex, whose low-angle detachment fault bounds the outcrops of plutonic rocks to the west. Plutons in...
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Universidad Nacional Autónoma de México
2017-04-01
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| Series: | Revista Mexicana de Ciencias Geológicas |
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| author | Elizard González-Becuar Efrén Pérez-Segura Ricardo Vega-Granillo Luigi Solari Carlos Manuel González-León Jesús Solé Margarita López Martínez |
| author_facet | Elizard González-Becuar Efrén Pérez-Segura Ricardo Vega-Granillo Luigi Solari Carlos Manuel González-León Jesús Solé Margarita López Martínez |
| author_sort | Elizard González-Becuar |
| collection | DOAJ |
| description | Plutonic rocks of the Puerta del Sol area, in central Sonora, represent the extension to the south of the El Jaralito batholith, and are part of the footwall of the Sierra Mazatán metamorphic core complex, whose low-angle detachment fault bounds the outcrops of plutonic rocks to the west. Plutons in the area record the magmatic evolution of the Laramide arc and the Oligo-Miocene syn-extensional plutonism in Sonora. The basement of the area is composed by the ca. 1.68 Ga El Palofierral orthogneiss that is part of the Caborca block. The Laramide plutons include the El Gato diorite (71.29 ± 0.45 Ma, U-Pb), the El Pajarito granite (67.9 ± 0.43 Ma, U-Pb), and the Puerta del Sol granodiorite (49.1 ± 0.46 Ma, U-Pb). The younger El Oquimonis granite (41.78 ± 0.32 Ma, U-Pb) is considered part of the scarce magmatism that in Sonora records a transition to the Sierra Madre Occidental magmatic event. The syn-extensional plutons are the El Garambullo gabbro (19.83 ± 0.18 Ma, U-Pb) and the Las Mayitas granodiorite (19.2 ± 1.2 Ma, K-Ar). A migmatitic event that affected the El Palofierral orthogneiss, El Gato diorite, and El Pajarito granite between ca. 68 and 59 Ma might be related to the emplacement of the El Pajarito granite. The plutons are metaluminous to slightly peraluminous, with the exception of El Oquimonis granite, which is a peraluminous two-mica, garnet-bearing granite. They are mostly high-K calc-alkaline with nearly uniform chondrite-normalized REE and primitive-mantle normalized multielemental patterns that are characteristic of continental margin arcs and resemble patterns reported for other Laramide granites of Sonora. The Laramide and syn-extensional plutons also have Sr, Nd and Pb isotopic ratios that plot within the fields reported for Laramide granites emplaced in the Caborca terrane in northwestern and central Sonora. Nevertheless, and despite their geochemical affinity to continental magmatic arcs, the El Garambullo gabbro and Las Mayitas granodiorite are syn-extensional plutons that were emplaced at ca. 20 Ma during development of the Sierra Mazatán metamorphic core complex. The 40Ar/39Ar and K-Ar ages obtained for the El Palofierral orthogneiss, the Puerta del Sol granodiorite, the El Oquimonis granite, and the El Garambullo gabbro range from 26.3 ± 0.6 to 17.4 ± 1.0 Ma and are considered cooling ages associated with the exhumation of the metamorphic core complex. |
| format | Article |
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| institution | OA Journals |
| issn | 1026-8774 2007-2902 |
| language | English |
| publishDate | 2017-04-01 |
| publisher | Universidad Nacional Autónoma de México |
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| series | Revista Mexicana de Ciencias Geológicas |
| spelling | doaj-art-c440cefc981c458b98081dfebd9ff4ce2025-08-20T02:32:44ZengUniversidad Nacional Autónoma de MéxicoRevista Mexicana de Ciencias Geológicas1026-87742007-29022017-04-0134110.22201/cgeo.20072902e.2017.1.401Laramide to Miocene syn-extensional plutonism in the Puerta del Sol area, central Sonora, MexicoElizard González-Becuar0Efrén Pérez-Segura1Ricardo Vega-Granillo2Luigi Solari3Carlos Manuel González-León4Jesús Solé5Margarita López Martínez6Departamento de Geología, Universidad de Sonora, Blvd. Encinas y Rosales, 83000, Hermosillo, Sonora, Mexico, Present address, Grupo México, Centro de Investigaciones, Centenario y Turquesa s/n, Colonia La Prieta, 33800, Hidalgo del Parral, Chihuahua, Mexico.Departamento de Geología, Universidad de Sonora, Blvd. Encinas y Rosales, 83000, Hermosillo, Sonora, Mexico.Departamento de Geología, Universidad de Sonora, Blvd. Encinas y Rosales, 83000, Hermosillo, Sonora, Mexico.Universidad Nacional Autónoma de México, Centro de Geociencias, Campus Juriquilla, 76230, Querétaro, Qro., Mexico.Universidad Nacional Autónoma de México, Instituto de Geología, Estación Regional del Noroeste, 83000, Hermosillo, Sonora, Mexico.Universidad Nacional Autónoma de México, Instituto de Geología, Ciudad Universitaria, 04510, Cd. de México, Mexico.Departamento de Geología, Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Carretera Ensenada-Tijuana No. 3918, 22860, Ensenada, Baja California, Mexico.Plutonic rocks of the Puerta del Sol area, in central Sonora, represent the extension to the south of the El Jaralito batholith, and are part of the footwall of the Sierra Mazatán metamorphic core complex, whose low-angle detachment fault bounds the outcrops of plutonic rocks to the west. Plutons in the area record the magmatic evolution of the Laramide arc and the Oligo-Miocene syn-extensional plutonism in Sonora. The basement of the area is composed by the ca. 1.68 Ga El Palofierral orthogneiss that is part of the Caborca block. The Laramide plutons include the El Gato diorite (71.29 ± 0.45 Ma, U-Pb), the El Pajarito granite (67.9 ± 0.43 Ma, U-Pb), and the Puerta del Sol granodiorite (49.1 ± 0.46 Ma, U-Pb). The younger El Oquimonis granite (41.78 ± 0.32 Ma, U-Pb) is considered part of the scarce magmatism that in Sonora records a transition to the Sierra Madre Occidental magmatic event. The syn-extensional plutons are the El Garambullo gabbro (19.83 ± 0.18 Ma, U-Pb) and the Las Mayitas granodiorite (19.2 ± 1.2 Ma, K-Ar). A migmatitic event that affected the El Palofierral orthogneiss, El Gato diorite, and El Pajarito granite between ca. 68 and 59 Ma might be related to the emplacement of the El Pajarito granite. The plutons are metaluminous to slightly peraluminous, with the exception of El Oquimonis granite, which is a peraluminous two-mica, garnet-bearing granite. They are mostly high-K calc-alkaline with nearly uniform chondrite-normalized REE and primitive-mantle normalized multielemental patterns that are characteristic of continental margin arcs and resemble patterns reported for other Laramide granites of Sonora. The Laramide and syn-extensional plutons also have Sr, Nd and Pb isotopic ratios that plot within the fields reported for Laramide granites emplaced in the Caborca terrane in northwestern and central Sonora. Nevertheless, and despite their geochemical affinity to continental magmatic arcs, the El Garambullo gabbro and Las Mayitas granodiorite are syn-extensional plutons that were emplaced at ca. 20 Ma during development of the Sierra Mazatán metamorphic core complex. The 40Ar/39Ar and K-Ar ages obtained for the El Palofierral orthogneiss, the Puerta del Sol granodiorite, the El Oquimonis granite, and the El Garambullo gabbro range from 26.3 ± 0.6 to 17.4 ± 1.0 Ma and are considered cooling ages associated with the exhumation of the metamorphic core complex.https://rmcg.unam.mx/index.php/rmcg/article/view/401Laramide magmatismsyn-extensional plutonismgeochronologygeochemistrySr-Nd-Pb isotopesSonora |
| spellingShingle | Elizard González-Becuar Efrén Pérez-Segura Ricardo Vega-Granillo Luigi Solari Carlos Manuel González-León Jesús Solé Margarita López Martínez Laramide to Miocene syn-extensional plutonism in the Puerta del Sol area, central Sonora, Mexico Revista Mexicana de Ciencias Geológicas Laramide magmatism syn-extensional plutonism geochronology geochemistry Sr-Nd-Pb isotopes Sonora |
| title | Laramide to Miocene syn-extensional plutonism in the Puerta del Sol area, central Sonora, Mexico |
| title_full | Laramide to Miocene syn-extensional plutonism in the Puerta del Sol area, central Sonora, Mexico |
| title_fullStr | Laramide to Miocene syn-extensional plutonism in the Puerta del Sol area, central Sonora, Mexico |
| title_full_unstemmed | Laramide to Miocene syn-extensional plutonism in the Puerta del Sol area, central Sonora, Mexico |
| title_short | Laramide to Miocene syn-extensional plutonism in the Puerta del Sol area, central Sonora, Mexico |
| title_sort | laramide to miocene syn extensional plutonism in the puerta del sol area central sonora mexico |
| topic | Laramide magmatism syn-extensional plutonism geochronology geochemistry Sr-Nd-Pb isotopes Sonora |
| url | https://rmcg.unam.mx/index.php/rmcg/article/view/401 |
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