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