In this paper, we merge more than 200 new apatite and zircon (U-Th)/He analyses and 21 apatite fi ssion-track analyses from 71 new samples with previous published thermochronologic data using the same systems to understand the growth and largescale kinematics of the central Andes between 21°S and 28°S. In general, minimum dates decrease and the total range of dates increases from west to east across the range. Large variations in thermochronometer dates on the east side refl ect high spatial gradients in depth of recent erosional exhumation. Almost nowhere in this part of the Andes has Cenozoic erosion exceeded ~6-8 km, and in many places in the eastern half of the range, erosion has not exceeded 2-3 km, despite these regions now being

No abstract