Provenance ages of late Paleozoic sandstones (Santa Rosa Formation) from the Maya block, SE Mexico. Implications on the tectonic evolution of western Pangea
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| Natura: | Artículo científico |
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Universidad Nacional Autónoma de México
2006
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| _version_ | 1876427568787226624 |
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| author | Victor A. Valencia |
| author_facet | Victor A. Valencia |
| contents | Provenance ages of late Paleozoic sandstones (Santa Rosa Formation) from the Maya block, SE Mexico. Implications on the tectonic evolution of western Pangea Victor A. Valencia Bodo Weber Peter Schaaf Alexander Iriondo Fernando Ortega Gutiérrez Ciencias de la Tierra Pan zircon African Gondwana sediments The Santa Rosa Formation in the State of Chiapas is a sequence of fl ysch-type sediments ofMississippian to Pennsylvanian age. These sedimentary rocks correlate with the Santa Rosa Group ofGuatemala and Belize and crop out along the southern limit of the Maya block north of the Motagua fault,which is currently considered the border between the North American and the Caribbean plates. Ages ofindividual zircon grains from sandstones of the Upper Santa Rosa Formation in southern Mexico wereanalyzed by Laser Ablation Multicollector ICPMS and by SHRIMP. The youngest zircon population is ofSilurian age (~420 Ma), but most grains have ages that correspond to the Pan-African-Brasiliano orogeniccycle (500700 Ma). Other minor populations have ~820 Ma, Grenville (1.01.3 Ga), Mesoproterozoic(1.41.6 Ga), Paleoproterozoic (1.82.2 Ga), and Archean (2.73.1 Ga) ages. Most of the sediments camefrom either present-day West Africa or NE South America, where both Pan-African-Brasiliano orogensand cratonic landmasses are present. In our model, southwestward progressive collision of Gondwanawith Laurentia during the Alleghanian orogeny resulted in erosion and deposition of fl ysch-type sedimentsto the west, followed by westward movement of the Maya block and adjacent lithosphere. 2006 artículo científico 1026-8774 https://www.redalyc.org/articulo.oa?id=57223302 en http://www.redalyc.org/revista.oa?id=572 Revista Mexicana de Ciencias Geológicas application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Ciencias Geológicas (México) Num.3 Vol.23 |
| format | Artículo científico |
| id | redalyc_57223302 |
| institution | Redalyc |
| language | en |
| publishDate | 2006 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Provenance ages of late Paleozoic sandstones (Santa Rosa Formation) from the Maya block, SE Mexico. Implications on the tectonic evolution of western Pangea Victor A. Valencia Ciencias de la Tierra Pan zircon African Gondwana sediments Provenance ages of late Paleozoic sandstones (Santa Rosa Formation) from the Maya block, SE Mexico. Implications on the tectonic evolution of western Pangea Victor A. Valencia Bodo Weber Peter Schaaf Alexander Iriondo Fernando Ortega Gutiérrez Ciencias de la Tierra Pan zircon African Gondwana sediments The Santa Rosa Formation in the State of Chiapas is a sequence of fl ysch-type sediments ofMississippian to Pennsylvanian age. These sedimentary rocks correlate with the Santa Rosa Group ofGuatemala and Belize and crop out along the southern limit of the Maya block north of the Motagua fault,which is currently considered the border between the North American and the Caribbean plates. Ages ofindividual zircon grains from sandstones of the Upper Santa Rosa Formation in southern Mexico wereanalyzed by Laser Ablation Multicollector ICPMS and by SHRIMP. The youngest zircon population is ofSilurian age (~420 Ma), but most grains have ages that correspond to the Pan-African-Brasiliano orogeniccycle (500700 Ma). Other minor populations have ~820 Ma, Grenville (1.01.3 Ga), Mesoproterozoic(1.41.6 Ga), Paleoproterozoic (1.82.2 Ga), and Archean (2.73.1 Ga) ages. Most of the sediments camefrom either present-day West Africa or NE South America, where both Pan-African-Brasiliano orogensand cratonic landmasses are present. In our model, southwestward progressive collision of Gondwanawith Laurentia during the Alleghanian orogeny resulted in erosion and deposition of fl ysch-type sedimentsto the west, followed by westward movement of the Maya block and adjacent lithosphere. 2006 artículo científico 1026-8774 https://www.redalyc.org/articulo.oa?id=57223302 en http://www.redalyc.org/revista.oa?id=572 Revista Mexicana de Ciencias Geológicas application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Ciencias Geológicas (México) Num.3 Vol.23 |
| title | Provenance ages of late Paleozoic sandstones (Santa Rosa Formation) from the Maya block, SE Mexico. Implications on the tectonic evolution of western Pangea |
| topic | Ciencias de la Tierra Pan zircon African Gondwana sediments |
| url | https://www.redalyc.org/articulo.oa?id=57223302 |