@article{GarciaHongnYagupskyetal.2019,
  author    = {Garcia, Victor H. and Hongn, Fernando D. and Yagupsky, Daniel and Pingel, Heiko and Kinnaird, Timothy and Winocur, Diego and Cristallini, Ernesto and Robinson, Ruth Aj and Strecker, Manfred},
  title     = {Late Quaternary tectonics controlled by fault reactivation. Insights from a local transpressional system in the intermontane Lerma valley, Cordillera Oriental, NW Argentina},
  series = {Journal of structural geology},
  volume    = {128},
  journal   = {Journal of structural geology},
  publisher = {Elsevier},
  address   = {Oxford},
  issn      = {0191-8141},
  doi       = {10.1016/j.jsg.2019.103875},
  pages     = {17},
  year      = {2019},
  abstract  = {We analyzed the Lomas de Carabajal area in the intermontane Lerma valley of the Cordillera Oriental to assess the level of neotectonic activity in a densely populated region of northwestern Argentina. In this region, Plio-Pleistocene synorogenic conglomerates are deformed, locally associated with high-angle faults, and NNW-SSE oriented en-echelon folds characterized by wavelengths of < 1 km. The deformed Quaternary units follow the same pattern of deformation as observed in the underlying Neogene deposits; growth-strata geometries are observed near faults. This configuration is compatible with local left-lateral transpressional tectonism driven by ENE-WSW buttressing against the NW-oriented border of a Cretaceous extensional basin (Alemania sub-basin). Optically Stimulated Luminescence analysis of sandy-silty layers interbedded within the folded late Pleistocene conglomeratic sequence helps to determine uplift rates of 0.83-0.87 mm/a during the last 30-40 ka. Nearby the Lomas de Carabajal, a WNW-striking, 3-m-high fault scarp disrupts radiocarbon dated, 10-ka-old loessic deposits providing a Holocene mean uplift rate of 0.30 mm/a. Our data unambiguously show that shallow crustal deformation in the intermontane Lerma valley is ongoing; some of this deformation may be associated with seismicity. Our findings support the notion of temporally and spatially disparate deformation processes in the broken foreland of the northwestern Argentinean Andes.},
  language  = {en}
}