Detrital zircon typology and U/Pb geochronology for the Miocene Ladrilleros-Juanchaco sedimentary sequence, Equatorial Pacific (Colombia): New constraints on provenance and paleogeography in northwestern South America
Typology and internal texture analyses were performed on detrital zircons obtained from the Miocene sandstones of the Ladrilleros-Juanchaco sedimentary sequence (Colombia, Equatorial Pacific). This analysis was complemented with zircon U/Pb dating to identify typology-age associations as indicators...
| Main Authors: | , , , , , |
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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)
2017-09-01
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| Series: | Geologica Acta |
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| Online Access: | https://revistes.ub.edu/index.php/GEOACTA/article/view/17296 |
| _version_ | 1827788100350246912 |
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| author | E. OSORIO-GRANADA S.A. RESTREPO-MORENO J.A. MUÑOZ-VALENCIA R.A. TREJOS-TAMAYO A. PARDO-TRUJILLO A.A. BARBOSA-ESPITIA |
| author_facet | E. OSORIO-GRANADA S.A. RESTREPO-MORENO J.A. MUÑOZ-VALENCIA R.A. TREJOS-TAMAYO A. PARDO-TRUJILLO A.A. BARBOSA-ESPITIA |
| author_sort | E. OSORIO-GRANADA |
| collection | DOAJ |
| description | Typology and internal texture analyses were performed on detrital zircons obtained from the Miocene sandstones of the Ladrilleros-Juanchaco sedimentary sequence (Colombia, Equatorial Pacific). This analysis was complemented with zircon U/Pb dating to identify typology-age associations as indicators of sediment provenance. Our results show that zircons with S and P dominant typologies have internal structures/zoning indicative of igneous, and potentially also metamorphic, origins. Morphometric results suggest limited transport from source areas. Both typology and U/Pb data point to the western Cordillera as the principal source of detrital materials for this sedimentary sequence. A paleogeographic reconstruction shows that, during the Late Miocene, significant portions of the western Cordillera were uplifted and actively eroding, thereby forming a fluvio-topographic barrier that prevented sediments from the central Cordillera reaching the Pacific basins. Exhumed Miocene plutons located along the axis of the western Cordillera may also have played a role as geomorphologically active massifs. This study demonstrates that typologic analysis on detrital zircon grains is a useful tool for establishing provenance and paleogeography in complex litho-tectonic areas where overlapping U/Pb signatures can lead to contradictory results.
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| first_indexed | 2024-03-11T17:01:41Z |
| format | Article |
| id | doaj.art-ca6d4bf2a4724af1942400dcdeddc114 |
| institution | Directory Open Access Journal |
| issn | 1696-5728 |
| language | English |
| last_indexed | 2024-03-11T17:01:41Z |
| publishDate | 2017-09-01 |
| 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-ca6d4bf2a4724af1942400dcdeddc1142023-10-20T07:24:33ZengUniversitat de Barcelona (UB), Geociències Barcelona (Geo3BCN), Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDAEA), Universitat Autònoma de Barcelona (UAB)Geologica Acta1696-57282017-09-01153Detrital zircon typology and U/Pb geochronology for the Miocene Ladrilleros-Juanchaco sedimentary sequence, Equatorial Pacific (Colombia): New constraints on provenance and paleogeography in northwestern South AmericaE. OSORIO-GRANADA0S.A. RESTREPO-MORENO1J.A. MUÑOZ-VALENCIA2R.A. TREJOS-TAMAYO3A. PARDO-TRUJILLO4A.A. BARBOSA-ESPITIA5Universidad de Caldas, Facultad de Ciencias, Departamento de Ciencias Geológicas Grupo de Investigaciones en Estratigrafía y Vulcanología (GIEV-Cumanday), Instituto de Investigaciones en Estratigrafía (IIES), Manizales, Colombia.Departamento de Geociencias y Medio Ambiente, Universidad Nacional de Colombia Sede Medellín Department of Geological Sciences. University of Florida Gainesville, Florida 32611, USAUniversidad de Caldas, Facultad de Ciencias, Departamento de Ciencias Geológicas Grupo de Investigaciones en Estratigrafía y Vulcanología (GIEV-Cumanday), Instituto de Investigaciones en Estratigrafía (IIES), Manizales, Colombia.Universidad de Caldas, Facultad de Ciencias, Departamento de Ciencias Geológicas Grupo de Investigaciones en Estratigrafía y Vulcanología (GIEV-Cumanday), Instituto de Investigaciones en Estratigrafía (IIES), Manizales, Colombia.Universidad de Caldas, Facultad de Ciencias, Departamento de Ciencias Geológicas Grupo de Investigaciones en Estratigrafía y Vulcanología (GIEV-Cumanday), Instituto de Investigaciones en Estratigrafía (IIES), Manizales, Colombia.Universidad de Caldas, Facultad de Ciencias, Departamento de Ciencias Geológicas Grupo de Investigaciones en Estratigrafía y Vulcanología (GIEV-Cumanday), Instituto de Investigaciones en Estratigrafía (IIES), Manizales, Colombia. Department of Geological Sciences. University of Florida Gainesville, Florida 32611, USATypology and internal texture analyses were performed on detrital zircons obtained from the Miocene sandstones of the Ladrilleros-Juanchaco sedimentary sequence (Colombia, Equatorial Pacific). This analysis was complemented with zircon U/Pb dating to identify typology-age associations as indicators of sediment provenance. Our results show that zircons with S and P dominant typologies have internal structures/zoning indicative of igneous, and potentially also metamorphic, origins. Morphometric results suggest limited transport from source areas. Both typology and U/Pb data point to the western Cordillera as the principal source of detrital materials for this sedimentary sequence. A paleogeographic reconstruction shows that, during the Late Miocene, significant portions of the western Cordillera were uplifted and actively eroding, thereby forming a fluvio-topographic barrier that prevented sediments from the central Cordillera reaching the Pacific basins. Exhumed Miocene plutons located along the axis of the western Cordillera may also have played a role as geomorphologically active massifs. This study demonstrates that typologic analysis on detrital zircon grains is a useful tool for establishing provenance and paleogeography in complex litho-tectonic areas where overlapping U/Pb signatures can lead to contradictory results. https://revistes.ub.edu/index.php/GEOACTA/article/view/17296MioceneLadrilleros-Juanchaco sedimentary sequenceColombia western CordilleraProvenance |
| spellingShingle | E. OSORIO-GRANADA S.A. RESTREPO-MORENO J.A. MUÑOZ-VALENCIA R.A. TREJOS-TAMAYO A. PARDO-TRUJILLO A.A. BARBOSA-ESPITIA Detrital zircon typology and U/Pb geochronology for the Miocene Ladrilleros-Juanchaco sedimentary sequence, Equatorial Pacific (Colombia): New constraints on provenance and paleogeography in northwestern South America Geologica Acta Miocene Ladrilleros-Juanchaco sedimentary sequence Colombia western Cordillera Provenance |
| title | Detrital zircon typology and U/Pb geochronology for the Miocene Ladrilleros-Juanchaco sedimentary sequence, Equatorial Pacific (Colombia): New constraints on provenance and paleogeography in northwestern South America |
| title_full | Detrital zircon typology and U/Pb geochronology for the Miocene Ladrilleros-Juanchaco sedimentary sequence, Equatorial Pacific (Colombia): New constraints on provenance and paleogeography in northwestern South America |
| title_fullStr | Detrital zircon typology and U/Pb geochronology for the Miocene Ladrilleros-Juanchaco sedimentary sequence, Equatorial Pacific (Colombia): New constraints on provenance and paleogeography in northwestern South America |
| title_full_unstemmed | Detrital zircon typology and U/Pb geochronology for the Miocene Ladrilleros-Juanchaco sedimentary sequence, Equatorial Pacific (Colombia): New constraints on provenance and paleogeography in northwestern South America |
| title_short | Detrital zircon typology and U/Pb geochronology for the Miocene Ladrilleros-Juanchaco sedimentary sequence, Equatorial Pacific (Colombia): New constraints on provenance and paleogeography in northwestern South America |
| title_sort | detrital zircon typology and u pb geochronology for the miocene ladrilleros juanchaco sedimentary sequence equatorial pacific colombia new constraints on provenance and paleogeography in northwestern south america |
| topic | Miocene Ladrilleros-Juanchaco sedimentary sequence Colombia western Cordillera Provenance |
| url | https://revistes.ub.edu/index.php/GEOACTA/article/view/17296 |
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