INVESTIGADORES
MESCUA Jose Francisco
artículos
Título:
Stress field and active faults in the orogenic front of the Andes in the Malargüe fold-and-thrust belt (35°–36°S)
Autor/es:
MESCUA, J.F.; BARRIONUEVO, M.; GIAMBIAGI, L.; SURIANO, J.; SPAGNOTTO, S.; STAHLSCHMIDT, E.; DE LA CAL, H.; SOTO, J.L.; MAZZITELLI, M.
Revista:
TECTONOPHYSICS
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Año: 2019 vol. 766 p. 179 - 193
ISSN:
0040-1951
Resumen:
We integrate field and wellbore data to discuss the stress field in the frontal sector of the Malarg├╝e fold-and-thrust belt (Andes of Argentina). Surface observations indicate N-S thrusts and NW to WNW and ESE strike-slip faults are active in the study area. Inversion of fault kinematic indicators, combined with borehole breakout data and a mini-frac test within the study area, constrain the Quaternary to recent stress state, which is characterized by a subhorizontal, E-W oriented maximum stress, and by intermediate and minimum stresses with similar magnitudes that are locally interchanged, producing a setting in which reverse and strike-slip faults are alternatively active. The implications of the recognized structures for earthquake hazard are examined.