Distinguishing environmental signals in a syn-orogenic, volcaniclastic to erosional engine sediment routing system: a case study from the Patagonian Foreland, Argentina

D'ELIA, LEANDRO; BILMES, ANDRÉS; VARELA, AUGUSTO; BUCHER, JOAQUÍN; LÓPEZ, MANUEL; GARCÍA, MICAELA; DANIELA FUNES; FRANZESE, JUAN R.

Toulouse

Congreso; 33Th International Meeting of Sedimentology - 16 CONGRÈS FRANÇAIS DE SÉDIMENTOLOGIE; 2017

The analysis of the controls in the sedimentation and surface processes into integrated, cause-effectmodels are in the spotlight during last years. The sedimentary record has been long used to analyze thedeformation and determining climate proxies at different temporal-spatial scales, motivating works focusedon to detect the tectonics and climate impact in non-marine basins infill. From the perspective of sedimentarysystem analysis, signals were defined as changes in sediment production, transport, or deposition that originatefrom perturbations of environmental variables for several timescales. However, relatively few studies haveconsidered the volcanism into all these schemes. This work examines the syn-orogenic Miocene succession inthe Southern Patagonian Broken-Foreland, Argentina, in an attempt to understand the coupling effects ofvolcanism, tectonic and climate controls to set signals in a complex sediment routing system (SRS). Based ona multidisciplinary approach, which includes structural analysis, facies model, palaeosol analysis, sequencestratigraphy, together with Digital Outcrop Modeling (DOM) and geochronology techniques, the main goalsof this study are to analyze: (1) how in a syn-orogenic context the volcaniclastic supply affects theclimatecontrolled erosion, and (2) how it affects environmental signals.