Along-strike variations in the timing and magnitude of exhumation in the eastern Peruvian Andes

Abstract:

The spatio-temporal history and control of uplift and incision of the eastern flank of the Central Andean Plateau margin is a point of controversial discussion. For example, ca. 4 Ma incision has been suggested for canyons in Bolivia and South Peru (> 1250 km apart) and could be interpreted as either tectonically or climatically driven. To evaluate the sensitivity of cooling ages to climatic and/or tectonic driven erosional exhumation, we build upon previous work and contribute new low-temperature thermochronometer data from three, up to 190-km-long transects from the eastern Andean Plateau to the Subandean Zone in southeastern Peru. The transects extend from the plateau down the San Gabán, Marcapata, and Tres Cruces valleys and include both valley bottom and interfluve samples. This is different from previous work and allows for an evaluation of age-elevation relationships along and across strike. We …

Año de publicación:

2022

Keywords:

Fuente:

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