A5004244600- earthquake and tectonic studies
- Geological and Geochemical Analysis
- Geological and Tectonic Studies in Latin America
- Geology and Paleoclimatology Research
- High-pressure geophysics and materials
- Geochemistry and Geologic Mapping
- Geological formations and processes
- Landslides and related hazards
- Seismology and Earthquake Studies
- Seismic Waves and Analysis
- Evolution and Paleontology Studies
- Earthquake Detection and Analysis
- Soil erosion and sediment transport
- Academic Research in Diverse Fields
- Paleontology and Stratigraphy of Fossils
- Agricultural and Food Sciences
- Business and Management Studies
- Environmental Sustainability and Education
- Chemistry Education and Research
- Physical Education and Gymnastics
- Cybercrime and Law Enforcement Studies
- Cultural, Media, and Literary Studies
- Geological and Geophysical Studies Worldwide
- Crime, Illicit Activities, and Governance
- Dam Engineering and Safety
Universidad del Norte
2024
University of Chile
2011-2022
Fundação Armando Alvares Penteado
2018
Expro (United States)
2015
Université de Toulouse
2008-2010
Institut de Recherche pour le Développement
2008-2010
Centre National de la Recherche Scientifique
2008-2010
Université Toulouse III - Paul Sabatier
2005
We analyze the west vergent thrust system (WTS) along western flank of Altiplano in northern Chile (18°S–21°S). In our study area (19°20′S–19°50′S), WTS consists three propagation monocline folds (flexures) developing growth strata. The relative uplift accommodated by flexures is rapid between 26 and 8 Ma (0.1 mm/yr), diminishing to 0.02 mm/yr after Ma. Approximately 2000 m surface was since late Oligocene. Sedimentological geomorphological analysis shows that westward tilting forearc...
We document a crustal‐scale structural model for the central Chile Andes based on seismicity and surface geology, which consists in major east verging ramp‐detachment structure connecting subduction zone with cordillera. The ramp rises from subducting slab at ∼60 km depth to 15–20 below western edge of cordillera, extending eastward as 10 flat detachment. This plays fundamental role Andean orogenesis because most shortening has been accommodated by structures rooted it allows distribution...
We observed vertically displaced coastal and river markers after the 27 February 2010 Chilean earthquake [moment magnitude (Mw) 8.8]. Land-level changes range between 2.5 -1 meters, evident along an approximately 500-kilometers-long segment identified here as maximum length of coseismic rupture. A hinge line located 120 kilometers from trench separates uplifted areas, to west, subsided regions. simple elastic dislocation model fits these observations well; parameters give a similar seismic...
We address the question of late Cenozoic geomorphological evolution central Chile Andes (33°–35°S), using uplift markers, river incision, previous and new ages volcanic bodies, fission track ages. The markers consist relicts high elevated peneplains that evidence >2 km regional surface lasting ∼2 Ma with variable amount along an E‐W transect. eastern Coastal Cordillera was uplifted 1.5–2.1 at 33–34°S <1 35°S, western Principal km, >2.5 33°45′S ∼1.5 34°30′S. Erosional response to...
Research Article| February 01, 2013 Slope and climate variability control of erosion in the Andes central Chile S. Carretier; Carretier 1Geosciences Environnement Toulouse, OMP, UPS, CNRS, IRD, Université de France Search for other works by this author on: GSW Google Scholar V. Regard; Regard R. Vassallo; Vassallo 2ISTerre, Savoie, 73376 Le Bourget du Lac, G. Aguilar; Aguilar 3Departamento Geología, Universidad Atacama, Copiapo, J. Martinod; Martinod Riquelme; Riquelme 4Departamento Ciencias...
We report a sequence of crustal quakes that began after the M w = 8.8 thrust‐subduction Maule earthquake affected Central Chile margin on 27 February 2010. This activity lasted by several months, having most important events 11 March 2010 ( 6.9 and 7.0) with normal focal mechanisms. Seismicity shows rupture oriented along NW‐striking SW‐dipping fault from surface down to interplate contact. can be correlated neotectonics extensional structures similarly in region, which have coexisted...
El 27 de febrero 2010 a las 03:34:08 la madrugada un terremoto magnitud Mw8,8, cuyo epicentro se ubico costa afuera Cobquecura (73,24°W; 36,29°S), afecto severamente zona centrosur Chile. Posteriormente tsunami costas comprendidas entre regiones Valdivia y Valparaiso, con efectos menores en Coquimbo. ocurrio lo largo subduccion placa tectonica Nazca bajo Sudamericana. Se estimo el levantamiento cosismico partir observaciones franja algas coralina lithothamnioideas, expuesta como producto del...
Abstract: Major fluvial incision (600–1000 m) affecting the Coastal Cordillera and Central Depression of northern Chile is analysed to evaluate supposed coeval uplift Altiplano and/or climatic changes in Atacama Desert. The timing beginning constrained by age deposition top. In north (18–19°S), this top corresponds gravels accumulated between 11.9 ± 0.6 Ma 8.3 0.5 Ma, which are genetically related semiarid climate an eastward poorly dissected parallel drainage network that developed 15.0...
Abstract New thermochronometric data provide evidence for an along‐strike diachronous building of the Andes in north‐central Chile (28.5–32°S). Geochronological (U‐Pb zircon) and thermochronological (apatite fission track (U‐Th)/He) analyses rock units were obtained west‐to‐east transects across western topographic front. Thermal models indicate that area west front was little exhumed since approximately 45 Ma. To east front, Main Cordillera shows both latitudinal longitudinal differences...
Abstract We document the effects of major mid‐Cretaceous to Late Cretaceous compression within volcanic arc western Gondwanan margin. The thinned Early Andean margin underwent rapid thickening and shortening‐related exhumation magmatic rocks during compressional inversion late intra‐arc basins. Clastic sedimentary recording this phase initial shortening correspond Las Chilcas Formation are interpreted have been deposited in a proximal retro‐arc position. A detailed analysis these deposits...
We explore the extent to which it is possible convert erosion rate data into uplift or laws, using a landscape evolution model. Transient stages of topography and rates block uplifting at constant are investigated different spatial scales, for climate, various laws initial topographies. identify three main model types mountain‐scale mean rate: “linear”‐type, “sigmoid”‐type “exponential”‐type. Linear‐type models obtained topographies without drainage system reorganization, in river incision...
Abstract The effect of mean precipitation rate on erosion is debated. Three hypotheses may explain why the current and runoff be spatially uncorrelated: (1) topography has reached a steady state for which pattern determined by uplift pattern; (2) only depends weakly runoff; or (3) studied catchments are experiencing different transient adjustments to climate variations. In Chilean Andes, between 27°S 39°S, annual rates increase southwards from 0.01 2.6 m −1 but catchment averaged decadal...
Abstract Intense storms or earthquakes in mountains can supply large amounts of gravel to rivers. Gravel clasts then travel at different rates, with periods storage and displacement leading their downstream dispersion over millennia. The rate this controls the long-term downcutting mountainous rivers as well grain-size signature climate tectonic variations sedimentary basins. Yet, millennial rates are poorly known. Here, we use 10 Be concentrations measured individual pebbles from a...