New petrochronological evidence for magmatic activity at the Central American arc at ∼100-84 Ma

New detrital zircon petrochronological data (~380 analysed grains), including U-Pb dating, trace element, and isotopic analyses from modern sediments and Oligocene-Miocene strata, cropping out along the western slope of the Baudó Range in the northern Pacific coast of Colombia (Tribugá and Cupica Gulfs), are used to assess the nature of Cretaceous basement rocks. Modern sediments of the Cupica Gulf show the existence of ~100-84 Ma zircons with juvenile isotopic signatures (εHf shifting from +11.0 to +12.9), and subduction-related geochemical features, as indicated by the low content of REE (