Geochronology
Geochronology
GChron
Articles | Volume 8, issue 1
Articles | Volume 8, issue 1
https://doi.org/10.5194/gchron-8-143-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gchron-8-143-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 8, issue 1
Research article
 | 
11 Mar 2026
Research article |  | 11 Mar 2026

U-Pb dating of chrysocolla from supergene copper deposits in the Coastal Cordillera of northern Chile, Atacama Desert

Juan Ríos-Contesse, Richard Albert, Benedikt Ritter-Prinz, Axel Gerdes, Tibor Dunai, and Eduardo Campos

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Short summary
This study dated chrysocolla, a supergene copper mineral, from copper deposits hosted in the Coastal Cordillera of northern Chile, with ages between 8.0 and 0.045 million years. Results show that from the Late Miocene to the Pleistocene, short periods of moisture triggered mineral formation despite the hyperarid climate. These wetter periods were likely caused by occasional rainfall or stronger coastal fog, causing repeated pulses of supergene activity in the Coastal Cordillera.
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