Detrital Thermochronology Reveals Major Middle Miocene Exhumation of the Eastern Flank ofthe Andes That Predates the PampeanFlat Slab (33°–33.5°S)
- Lossada, Ana Clara
- Hoke, Gregory D.
- Giambiagi, Laura Beatriz
- Fitzgerald, P. G.
- Mescua, Jose Francisco
- Suriano, Julieta
- Aguilar, A.
DOIAbstract
The Cordón del Plata and Cordón del Portillo (32.6°?33.8°S) are the portions of the FrontalCordillera that straddle the transition zone between the Pampean flat‐slab subduction segment to thenorth and the normal subduction segment to the south. A complete understanding of how the FrontalCordillera developed is necessary in order to evaluate different tectonic models for the Andes along withtheir relation to subduction dynamics and contractional upper‐crustal deformation. Detrital apatite fissiontrack thermochronology of modern river sediments that drain the eastern and western slopes of theCordón del Plata and the northern Cordón del Portillo provides constraints on regional exhumationhistories. AFT data from each catchment typically contai...
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