Artículos de revistas
NORTHWARD TRANSLATION OF MESOZOIC BATHOLITS WESTERN NORTH AMERICA: PALEOMAGNETIC EVIDENCE AND TECTONIC SIGNIFICANCE
NORTHWARD TRANSLATION OF MESOZOIC BATHOLITS WESTERN NORTH AMERICA: PALEOMAGNETIC EVIDENCE AND TECTONIC SIGNIFICANCE
Autor
Beck, Jr, M. E.; Departament of Geology, Westem Washington University, Bellingham, Waschington (98225), U.S.A
Burmester, R. F.; Departament of Geology, Westem Washington University, Bellingham, Waschington (98225), U.S.A
Engebretson, D. C.; Current address: Department of Departament of Geology, Standford University,California (94305), U.S.A
Schoonover, R.; Departament of Geology, Westem Washington University, Bellingham, Waschington (98225), U.S.A
Institución
Resumen
Paleomagnetic measurements indicate that many, perhaps all, Mesozoic batholiths currently on the western edge of North America originated far south of their present locations. Two kinds of tectonic transport probably contributed to their general northward migration: (1) California style transport, in which the batholith belt becomes detached from the continent along a zone of transform faulting; (2) Sunda-style transport, in which a sliver of continental lithosphere including the batholith belt moves along the edge of the continent in response to oblique subduction. Interaction of North America with the Farallon and Kula plates can account for the creation of the batholiths, as well as their northward transport. Investigaciones palcomagnéticas indican que muchos, quizá todos, los batolitos Mesozoicos localizados en el margen occidental de Norteamérica se originaron al sur de las localidades presentes. Dos clases de transporte tectónico han contribuido a esta migración tectónica general: (1) transporte estilo California, en el cual los batolitos son separados de la masa continental a través de fallas transformadas; y (2) transporte estilo Sunda, en el cual un fragmento de litósfera, incluyendo batolitos, es trasladado a lo largo del margen continental en respuesta a procesos de subducción oblicua. La interacción de la placa Norteamericana con las placas Farallón y Kula puede explicar la creación de los batolitos , así como su transporte hacia el norte.