Melt Events in A Nascent Mantle Wedge: Implication from the Luobusa Ophiolite, Tibet

The compositions of minerals and whole rocks of the Luobusa ophiolite in South Tibet, a fragment of Neo‐Tethyan forearc lithosphere, is used to investigate the magmatic evolution of nascent mantle wedges in newly‐initiated subduction zones. Clinopyroxenes in the Luobusa peridotites all have diopsidic compositions, and their Al 2 O 3 contents vary from ∼ 2% in the dunites and refractory harzburgites to 2‐4% in the cpx‐bearing harzburgites. The...