@misc{10481/100418,
year = {2019},
url = {https://hdl.handle.net/10481/100418},
abstract = {The Argentine Tierra del Fuego comprises part of the roughly east-west trending southern end
of the Andean Cordillera intensely deformed since the Mesozoic. Mesostructures have been measured in
Late Jurassic to Miocene rocks. Taking into account statistical criteria to provide a representative stress
tensor from a fault population, this study defines 28 paleostress tensors pertaining to 22 sites. The orientation
of σ1 shows two main modes trending E-W to ESE-WNW and NE-SW. In addition, extensional sites reveal N-S,
NE-SW, ESE-WNW, and NW-SE horizontal σ3 and vertical σ1. The stress fields obtained are congruous with
a regional NE-SW compressive stress direction active in the study zone since the Late Cretaceous. Shortening
was coeval with a 30° counterclockwise rotation of the Patagonian orogenic curve and the indentation of the
orogenic wedge against a basement high, the Río Chico Arch, up to the early Miocene. The indentation
caused a modification in the orientation of the compressive stress trajectories, showing NE-SW direction in
Sorondo Range sector and NW-SE in Mitre Peninsula area. Since the late Miocene, left-lateral activity
along the Magallanes-Fagnano Fault System produced local deviations of the NE-SW compressive stress
toward an E-W direction. The present-day stress field is also characterized by NE-SW subhorizontal P axis
derived from earthquake focal mechanisms and geodetic studies.},
organization = {This work has been funded by projects
CTM2011-30241-C02-02, CTM2014-
60451-C2-2-P and CTM2017-89711-C2-
2-P of the Spanish R&D National Plan
and by PICT funding from ANPCyTFONCyT
(Argentina).},
title = {Stress field evolution of the southernmost Andean Cordillera from paleostress analysis (Argentine Tierra del Fuego).},
doi = {10.1029/2018TC005158},
author = {Maestro, A and Ruano, P and Torres Carbonell, P and Bohoyo, F and Galindo‐Zaldívar, J and Pedrera, A and Ruiz-Constán, A and López‐Martínez, J and González Castillo, María Lourdes},
}