Análisis tectónico del sistema transpresivo neogénico entre Macuspana, Tabasco, y Puerto Ángel, Oaxaca

  • Luis Alberto Delgado-Argote Instituto de Geología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Delegación Coyoacán, 04510 D.F. Dirección actual: Centro de Investigación Científica y Educación Superior de Ensenada (CICESE), Av. Espinazo 843, 22800 Ensenada, Baja California.
  • Enrique Alberto Carballido-Sánchez Instituto de Geología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Delegación Coyoacán, 04510 D.F. Dirección actual: Geology Department, Tulane University, New Orleans, 70118 LA, USA.
Keywords: ectonics, transpression, Tabasco, Oaxaca, Mexico

Abstract

The structurally complex geometry of southeastern Mexico can be partially explained by stability analysis of the region of convergence between the North America, Caribbean and Cocos plates. A trench-trench-transform fault triple junction is located south-southeast of Salina Cruz. It is unstable and migrates eastward since about 8 Ma, from Puerto Ángel, along the Polochic system. The geometric solution and evolution of the triple junction of the Gulf of Tehuantepec explains major tectonic features such as: (a) a gravimetrically defined basin, between Puerto Ángel and Salina Cruz; (b) a left-handed transpressive system, 100 km wide and SW-NE oriented, which runs from Puerto Ángel to Macuspana; and (c) a probably active clockwise rotative block located between the Puerto Ángel Macuspana and Polochic-Motagua transcurrent systems. The northern limits of this block are not well-defined… In order to continue, download the full text in PDF.

Published
2019-03-07
Issue
Vol 9 No 1 (1990)
Section
Número especial: Centenario del Instituto de Geología

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