The paleoposition of the Antimonio depositional system (Sonora, Mexico): New insights from nonparametric and multivariate analysis of detrital zircon data

The Antimonio depositional system ranges from the Upper Permian to the uppermost Lower Jurassic. It is the only locality of Upper Triassic shallow marine carbonates in Mexico and through its speculative basement; it provides a potential link between the terrane framework of Mexico and the North American Cordillera. Various paleotectonic models have been proposed to explain the mixed siliciclastic-carbonate successions of the Antimonio depositional system in Sonora, Mexico, including interpreting it as a distinct allochthonous terrane or having a position close to the Laurentian basement. Microfacies, paleontological and paleomagnetic studies have suggested a paleogeographic position in low latitudes close to Laurentia. However, the basement structures of the Antimonio depositional system are poorly known and have numerous uncertainties.