Articles
Geodynamic regional scheme for norwestern southamerica (subduccion model and relative displacements)
Published 2005-01-11
Keywords
- Subduction Zone,
- Wadati-Benioff Zone,
- Regional Seismicity
How to Cite
Monsalve, H., & Mora, H. (2005). Geodynamic regional scheme for norwestern southamerica (subduccion model and relative displacements). Boletín De Geología, 27(1), 25–53. Retrieved from https://revistas.uis.edu.co/index.php/revistaboletindegeologia/article/view/865
Abstract
This paper introduces some Isodepth contourns maps as well as the geometry of the subducted Nazca plate. We propose that the north boundary of the Nazca plate is located at a latitide of 8°N. Additionnally, we determine three dip angles 38°, 30° and 18° with constant transition between the Cauca and Murindo segments, this angle increases from north to south. A transition zone located between 5°N to 6°N is proposed, in which there is a change in the slope of the plate. This transition zone coincides with the place where the volcanoes disappear, the north arch of the Central Cordillera.
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References
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Campbell, C. J. (1968). The Santa Marta wrench faultof Colombia and its regional setting. En IV Conf. Geolog.del Caribe, Trinidad
Cárdenas, C. (1997). Sismicidad y Geometría de la zonade wadati-Benioff en el istmo de Tehuantepec. Tesis deLicenciatura, UNAM
Allenby, R. J. (1984). Andean Tectonics: Implicationsfor Satellite Geodesy, NASA Technical Memorandum86160, 41p
Assumpcao, M. (1992). The Regional Intraplate StressField in South America, J. Geophys. Res., Vol. 97, pp.11889-11903
Atwater, T. (1989). Plate tectonic History, Northeast Pacificand Western North America. The Geology of NorthAmerica Vol N,the Eastern Pacific Ocean and Hawaii. TheGeological society of America, chapter 4
Barazangi, M., Isacks, B. (1976). Spatial distributionearthquakes and subduction of the Nazca plate BeneathSouth America. Geology, Vol. 4, pp. 686- 692
Barragan R., Geist D., Hall , D., Larson, P., Kurz, P. (1998).Subduction controls on the compositions of lavas fromEcuadorian Andes. Earth and Planetary Science Letters,Vol. 154, pp. 153-166.
Ben-menahem, A., Singh, S.J. (1980). Seismic Waves andSources. Springer Verlag, New-York
Benioff, H. (1954). Orogenesis and deep crustal Structure:Additional evidence from Seismology. Geophysical Societyof American Bulletin, Vol.-65, pp. 385-400
Bevis, M., Isacks, B. (1984). Hypocentral trend surfaceanalysis : Probing the geometry of Benioff zones. JournalGeophysical Research , Vol. 89, pp. 7719 - 7735
Burbach, G. V., Frohlich, C., Pennington, W., Matumoto, T.(1984). Seismology and tectonics of the subducted Cocosplate.Journal Gepophysical Research, Vol. 89, pp. 6153-6170
Cahill, T., Isacks, B.L. (1992). Seismicity and shape ofthe subducted Nazca Plate. Journal Geophysical Research,Vol. 97, pp. 17503-17529.
Campbell, C. J. (1968). The Santa Marta wrench faultof Colombia and its regional setting. En IV Conf. Geolog.del Caribe, Trinidad
Cárdenas, C. (1997). Sismicidad y Geometría de la zonade wadati-Benioff en el istmo de Tehuantepec. Tesis deLicenciatura, UNAM