Aim Although New Caledonia (NC) is now considered an oceanic island that emerged ca. 60 Ma, a few terrestrial clades are significantly older, raising the question of the origin of these groups. Classically, old lineages on more recent islands are hypothesized to originate through a process of hopping on now‐vanished islands (i.e., island‐hopping hypothesis) or other territories. We aim to test this hypothesis by studying a gro...

In southern New Caledonia, Late Oligocene granodiorite and adamellite are intruded into an ultramafic allochthon emplaced in the Late Eocene period. Previous studies of these granitoids proposed an origin associated with the melting of the underlying continental crust, but our new data show that these high‐K to medium‐K calc‐alkaline granitoids display the geochemical and isotopic features of volcanic arc magmas uncontaminated...