Paleomagnetic and tectonic constraints on the Late Cretaceous to early Tertiary northward translation of the Baja California peninsula
Cretaceous paleomagnetic data for the Baja California Peninsula (northwestern Mexico; southwestern California, U.S.A.) consistently indicate northward translation ( ͌ 8° in latitude or ~900 Km) and clockwise rotation ( ͌ 20°) of the region relative to ancestral North America prior to opening of the...
| Autores: | , |
|---|---|
| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 1990 |
| País: | México |
| Recursos: | UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO |
| Repositorio: | Geofísica Internacional |
| Idioma: | español |
| OAI Identifier: | oai:revistagi.geofisica.unam.mx:article/1053 |
| Acesso em linha: | http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/1053 |
| Access Level: | acceso abierto |
| Palavra-chave: | Paleomagnetismo Tectonica de placas Estructuras y procesos de margen de placa Paleomagnetism Plate tectonics Plate margin Structures and processes |
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Paleomagnetic and tectonic constraints on the Late Cretaceous to early Tertiary northward translation of the Baja California peninsula Paleomagnetic and tectonic constraints on the Late Cretaceous to early Tertiary northward translation of the Baja California peninsula |
| title |
Paleomagnetic and tectonic constraints on the Late Cretaceous to early Tertiary northward translation of the Baja California peninsula |
| spellingShingle |
Paleomagnetic and tectonic constraints on the Late Cretaceous to early Tertiary northward translation of the Baja California peninsula Hagstrum, J. T. Paleomagnetismo Tectonica de placas Estructuras y procesos de margen de placa Paleomagnetism Plate tectonics Plate margin Structures and processes |
| title_short |
Paleomagnetic and tectonic constraints on the Late Cretaceous to early Tertiary northward translation of the Baja California peninsula |
| title_full |
Paleomagnetic and tectonic constraints on the Late Cretaceous to early Tertiary northward translation of the Baja California peninsula |
| title_fullStr |
Paleomagnetic and tectonic constraints on the Late Cretaceous to early Tertiary northward translation of the Baja California peninsula |
| title_full_unstemmed |
Paleomagnetic and tectonic constraints on the Late Cretaceous to early Tertiary northward translation of the Baja California peninsula |
| title_sort |
Paleomagnetic and tectonic constraints on the Late Cretaceous to early Tertiary northward translation of the Baja California peninsula |
| dc.creator.none.fl_str_mv |
Hagstrum, J. T. Filmer, P. E. |
| author |
Hagstrum, J. T. |
| author_facet |
Hagstrum, J. T. Filmer, P. E. |
| author_role |
author |
| author2 |
Filmer, P. E. |
| author2_role |
author |
| dc.subject.none.fl_str_mv |
Paleomagnetismo Tectonica de placas Estructuras y procesos de margen de placa Paleomagnetism Plate tectonics Plate margin Structures and processes |
| topic |
Paleomagnetismo Tectonica de placas Estructuras y procesos de margen de placa Paleomagnetism Plate tectonics Plate margin Structures and processes |
| description |
Cretaceous paleomagnetic data for the Baja California Peninsula (northwestern Mexico; southwestern California, U.S.A.) consistently indicate northward translation ( ͌ 8° in latitude or ~900 Km) and clockwise rotation ( ͌ 20°) of the region relative to ancestral North America prior to opening of the Gulf of California in late Miocene time. Paleomagnetic and rock magnetic studies in Upper Cretaceous rocks younger than the Cretaceous Normal Polarity Superchron (Aptian to Santonian) confirm the age of the Cretaceous magnetization, and paleomagnetic data for early to middle Miocene lava flows indicate that peninsular California was near its pre-Gulf position against coastal Sonora during much of Miocene time. Estimates of potential coastwise displacement of crustal fragments along the western margin of North America by oblique subduction and arc-parallel strike-slip faulting for all of Paleogene time, based on modern analogs and plate reconstruction models of Farallon and Farallon + Kula plate motion ( ͌ 1000-2000 Km), are roughly equivalent to the northward displacement of peninsular California indicated by the Cretaceous paleomagnetic data ( ͌ 900 Km). However, current paleomagnetic and geologic studies indicate that the pre-Miocene displacement of peninsula California may have been completed by early Eocene time. The available paleomagnetic and paleontologic data constrain northward movement to have occurred between Chron 32r and Chron 23r, or between ͌ 70 Ma and ͌52 Ma. Coastwise transport of 900 Km during this time interval is most easily explained within the context of our model by arc-parallel strike-slip faulting related to oblique subduction of the Kula plate, although transport could also have occurred within the limits of relative motion of the Farallon plate depending on the trend of the North American margin and efficiency of the mechanism of transport. |
| publishDate |
1990 |
| dc.date.none.fl_str_mv |
1990-10-01 |
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info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
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article |
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publishedVersion |
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http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/1053 10.22201/igeof.00167169p.1990.29.4.630 |
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http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/1053 |
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10.22201/igeof.00167169p.1990.29.4.630 |
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spa |
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spa |
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http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/1053/988 |
| dc.rights.none.fl_str_mv |
Derechos de autor 1990 Geofisica Internacional https://creativecommons.org/licenses/by-nc-sa/4.0/ info:eu-repo/semantics/openAccess |
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Derechos de autor 1990 Geofisica Internacional https://creativecommons.org/licenses/by-nc-sa/4.0/ |
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openAccess |
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application/pdf |
| dc.publisher.none.fl_str_mv |
Universidad Nacional Autónoma de México. Instituto de Geofísica |
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Universidad Nacional Autónoma de México. Instituto de Geofísica |
| dc.source.none.fl_str_mv |
Geofisica Internacional; Vol. 29 No. 4 (1990): October 1, 1990; 175-184 Geofísica Internacional; Vol. 29 Núm. 4 (1990): Octubre 1, 1990; 175-184 2954-436X 0016-7169 10.22201/igeof.00167169p.1990.29.4 reponame:Geofísica Internacional instname:UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO instacron:UNAM |
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UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO |
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UNAM |
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UNAM |
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Geofísica Internacional |
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Geofísica Internacional |
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1858177563341357056 |
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Paleomagnetic and tectonic constraints on the Late Cretaceous to early Tertiary northward translation of the Baja California peninsulaPaleomagnetic and tectonic constraints on the Late Cretaceous to early Tertiary northward translation of the Baja California peninsulaHagstrum, J. T.Filmer, P. E.PaleomagnetismoTectonica de placasEstructuras y procesos de margen de placaPaleomagnetismPlate tectonicsPlate margin Structures and processesCretaceous paleomagnetic data for the Baja California Peninsula (northwestern Mexico; southwestern California, U.S.A.) consistently indicate northward translation ( ͌ 8° in latitude or ~900 Km) and clockwise rotation ( ͌ 20°) of the region relative to ancestral North America prior to opening of the Gulf of California in late Miocene time. Paleomagnetic and rock magnetic studies in Upper Cretaceous rocks younger than the Cretaceous Normal Polarity Superchron (Aptian to Santonian) confirm the age of the Cretaceous magnetization, and paleomagnetic data for early to middle Miocene lava flows indicate that peninsular California was near its pre-Gulf position against coastal Sonora during much of Miocene time. Estimates of potential coastwise displacement of crustal fragments along the western margin of North America by oblique subduction and arc-parallel strike-slip faulting for all of Paleogene time, based on modern analogs and plate reconstruction models of Farallon and Farallon + Kula plate motion ( ͌ 1000-2000 Km), are roughly equivalent to the northward displacement of peninsular California indicated by the Cretaceous paleomagnetic data ( ͌ 900 Km). However, current paleomagnetic and geologic studies indicate that the pre-Miocene displacement of peninsula California may have been completed by early Eocene time. The available paleomagnetic and paleontologic data constrain northward movement to have occurred between Chron 32r and Chron 23r, or between ͌ 70 Ma and ͌52 Ma. Coastwise transport of 900 Km during this time interval is most easily explained within the context of our model by arc-parallel strike-slip faulting related to oblique subduction of the Kula plate, although transport could also have occurred within the limits of relative motion of the Farallon plate depending on the trend of the North American margin and efficiency of the mechanism of transport.Los resultados paleomagnéicos del Cretaceo de Baja California y parte de California indican consistentemente un movimiento al norte y una rotación positiva de la region con respecto al cratón de Norteamérica antes de la apertura del Golfo de California durante el Mioceno Tardio. La edad Creticica de la magnetización se confirma por medio de estudios paleomagnéticos del cretaceo Superior más recientes que el Supercron Cretacico de Polaridad Normal (Aptio al Santoniano) y los registros paleomagnéticos para lavas del Mioceno Inferior a Medio indican que la California peninsular se encontraba en su posición "pre-Golfo" junto a la costa de Sonora durante gran parte del Mioceno. Las estimaciones de desplazamiento costero potencial con respecto al borde oeste de Norteamérica debido a subducción oblicua durante todo el Paleogeno basadas en analogfas de placa modernas y en reconstrucciones del movimiento de las placas Farallón y Kula + Farallon ( ͌ 1000-1200 km), corresponden aproximadamente al movimiento de la California peninsular hacia el norte que sugieren los resultados paleomagnéticos sobre el Cretaceo ( ͌ 900 km). Sin embargo, los estudios paleomagnéticos y geológicos más recientes indican que el desplazamiento ante-Mioceno de la California peninsular termino antes del Eoceno Inferior. De este modo, el movimiento al norte debe haber ocurrido entre los Crones 32r y 23r, 0 sea entre - ͌ 70 Ma y - ͌ 52 Ma, y el movimiento costero de 900 km durante este tiempo se explica probable mente como movimientos transcurrentes paralelos al arco que pudieran estar relacionados con la subduccion oblicua de la placa de Kula, aunque el movimiento al norte también pudiera haber ocurrido dentro de los limites del movimiento relativo de la placa de Farallón, basado en la alineación del margen norteamericano y la eficiencia del mecanismo de desplazamiento.Universidad Nacional Autónoma de México. Instituto de Geofísica1990-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://revistagi.geofisica.unam.mx/index.php/RGI/article/view/105310.22201/igeof.00167169p.1990.29.4.630Geofisica Internacional; Vol. 29 No. 4 (1990): October 1, 1990; 175-184Geofísica Internacional; Vol. 29 Núm. 4 (1990): Octubre 1, 1990; 175-1842954-436X0016-716910.22201/igeof.00167169p.1990.29.4reponame:Geofísica Internacionalinstname:UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICOinstacron:UNAMspahttp://revistagi.geofisica.unam.mx/index.php/RGI/article/view/1053/988Derechos de autor 1990 Geofisica Internacionalhttps://creativecommons.org/licenses/by-nc-sa/4.0/info:eu-repo/semantics/openAccessoai:revistagi.geofisica.unam.mx:article/10532024-08-16T17:32:04Z |
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15,81155 |