Diverse Magmatic Evolutionary Trends of the Northern Andes Unraveled by Paleocene to Early Eocene Detrital Zircon Geochemistry

Abstract The Paleocene‐early Eocene continental magmatic arc (PECMA) in the Northern Andes is an example of magmatism following a major collisional event. This formed after arc‐continent collision between Caribbean Plate and South American margin at ca. 72 Ma. We used detrital zircon LA‐ICP‐MS CA‐ID‐TIMS geochronology geochemistry to complement limited plutonic record PECMA better characterize PECMA's evolution. Zircon their respective trace element were analyzed from strata Bogotá Formation foreland region. Our results show that Plate, magmas differentiated under thick crust with subduction input 66 By 62–50 Ma, scattered patterns Hf, U, U/Yb, Yb/Gd ratios zircons suggest existence contrasting inputs attributed different depths crustal fractionation, varied temperatures crystallization, significant mantle inputs. These diverse reflect evolution crust. proposed oblique convergence strike‐slip tectonics favored architectures along while local lithosphere dripping previously thickened promoted formation hot