Geochronology of pediment surfaces in southern Peru: Implications for Quaternary deformation of the Andean forearc

Multidisciplinary approach of the hyperarid desert of Pampas de La Joya in southern Peru as a new Mars-like soil analog

“…If the Pampas de La Joya desert basin was deposited near sea level in the Miocene, a total of 1200 m uplift would have occurred at rates between 0.22 and 0.13 mm/a. Actual uplift rates have been recently estimated for the southern Perú basins at 0.04-0.3 mm/a based on cosmogenic 10 Be dating of river terraces and abandoned pediplains surfaces (Hall et al, 2008). Similar uplift rates at 0.05-0.13 mm/year calculated from apatite fission-track and (U/Th)/He techniques, combined with geomorphological analysis have been obtained for central Perú (Wipf et al, 2008).…”

Tectonic and climatic controls on the Chuquibamba landslide (western Andes, southern Peru)

“…Starting at ∼ 9-10 Ma, these units were incised by 1-3 km deep canyons that strike perpendicular to NW-SE-striking range (Schildgen et al, 2007(Schildgen et al, , 2009Thouret et al, 2007;Gunnell et al, 2010). The Western Cordillera and Pacific piedmont are affected by Quaternary tectonic deformation mainly expressed in the Western Cordillera by an active fault system striking parallel to the range (Sébrier et al, 1985;Hall et al, 2008Hall et al, , 2012 (Fig. 2).…”

“…Along the Andes, the active subduction and induced crustal deformation largely control the geomorphologic evolution of the forearc (Keefer, 1994;Keefer and Moseley, 2004;Tavera et al, 2007;Perfettini et al, 2010). The piedmont region is exposed to extremely low denudation rates ranging from 0.1-1 mm kyr −1 in the coastal desert and Pacific piedmont to 1-46 mm kyr −1 in the Western Cordillera (values obtained for Quaternary timescale by TCN dating; Hall et al, 2008;Kober et al, 2007) due to the arid climatic conditions since at least the Neogene (Mortimer, 1980;Alpers and Brimhall, 1988;Dunai et al, 2005;Rech et al, 2006). Moreover, the Altiplano has been the target of many paleoclimatic investigations (Thompson et al, 1998(Thompson et al, , 2000Cross et al, 2001;Baker et al, 2001;Placzek et al, 2006Placzek et al, , 2013 that highlighted climate fluctuations for the last 130 kyr.…”

“…It belongs to the Andean arid piedmont, where geomorphic markers are minimally affected by erosion/transport processes (Hall et al, 2008). In this study, we aim to explore how seismotectonic activity and/or abrupt climate change may potentially have triggered the large Chuquibamba landslides.…”

LiDAR Data for Characterizing Linear and Planar Geomorphic Markers in Tectonic Geomorphology

“…Planar geomorphic features such as fluvial terraces, alluvial fans, and marine terraces have been widely used as geomorphic markers in tectonic deformation studies [26][27][28][29][30][31][32][33], while erosion surfaces such as pediments [34,35] and glacis [36] have been less used as geomorphic markers due to the difficulty in dating of such surfaces. Several studies have used LiDAR data to analyze tectonic deformation of alluvial fans and marine terraces.…”