Miocene tectonic deformation of central Japan-Paleomagnetic evidence of intra-arc bending
Recent paleomagnetic studies in the Kanto Mountains, central Japan, have revealed Miocene rotation of the east-wing of the bending structure of pre-Neogene geologic terranes. More than 90° colckwise rotation of the Kanto Mountains took place between 15 and 6 Ma. In contrast, Southwest Japan and it e...
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 1994 |
| País: | México |
| Institución: | UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO |
| Repositorio: | Geofísica Internacional |
| Idioma: | español |
| OAI Identifier: | oai:revistagi.geofisica.unam.mx:article/467 |
| Acceso en línea: | http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/467 |
| Access Level: | acceso abierto |
| Palabra clave: | Rotación tectónica tectónica de collision paleomagnetismo islas Japonesas tectónica de arco de islas Tectonic rotation collision tectonics paleomagnetism Japanese Islands island arc tectonics |
| Sumario: | Recent paleomagnetic studies in the Kanto Mountains, central Japan, have revealed Miocene rotation of the east-wing of the bending structure of pre-Neogene geologic terranes. More than 90° colckwise rotation of the Kanto Mountains took place between 15 and 6 Ma. In contrast, Southwest Japan and it eastern part (Nohi area) have rotate clockwise through 47° and 13-17° around 15 Ma, respectively. This differential rotation represents an intra-arc deformation during the Miocene. In addition, the field investigations reveal that the Izu-Bonin arc has been colliding with central Japan since the Middle Miocene. Along whit this previous paleomagnetic results accompanied with geological studies in central Japan, it is concluded that lateral bending of central Japan occurred during 15 and 16 Ma in association with the collision between the southeastward drifting Japanese Islands and the northwestward migrating Izu-Bonin arc. |
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