La Arena and Alizar are porphyry-type Cu-Au-(Mo) deposits with associated Calaorco and Vanessa high-sulfidation epithermal mineralizations, respectively. In this study, we conducted multiple conventional geochronologic analyses on samples from La Arena district, with the objective to obtain precise a temporal relationship among porphyry emplacement, hydrothermal alterations, cooling, exhumation history and preservation, together with published age data for the district. A precursor quartz–diorite pluton and a late–mineral andesite porphyry bracketed the mineralization in the La Arena and Alizar porphyry deposits. Zircon U-Pb dating of these intrusive rocks display markedly concordant ages, with emplacement beginning and ending at 26.50 ± 0.23 to 25.36 ± 0.07 Ma at La Arena, and at 26.47 ± 0.08 to 25.30 ± 0.07 Ma at Alizar. 40Ar/39Ar chronologic data for hydrothermal biotite from ...