The Yanaurcu volcano (Western Cordillera, Ecuador): A field, petrographic, geochemical, isotopic and geochronological study

The Yanaurcu volcanic center in the Ecuadorian frontal arc is characterized by several epochs of activity from the Early Pliocene to approx. 61 ka, with important changes in geochemistry and isotope ratio values throughout its history. Most of its units have high Sr/Y and La/Yb signatures. We present a comprehensive study of this volcano involving morphological and stratigraphical observations, sampling, petrography, whole rock and in situ...