Dupal Anomaly and Identification using Nd‐Hf Isotopes

Abstract The Dupal anomaly has attracted widespread attention since being discovered and is regarded as the most direct manifestation of mantle inhomogeneity at present. From initially defined anomalies limited to southern hemisphere global scale, criteria for identifying by Pb isotopes have also been adjusted, providing an important method reference study evolution. Pearce Peate (1995) proposed Nd‐Hf isotope element ratio identify anomaly. offers a possible way discriminate region arc magmatism through correction Nd in subduction process. This paper introduces concepts determination methods anomaly, reports new Hf isotopic data MORB‐type rocks with signature several Tethys ophiolites. Our results are good agreement those previous identification. Moreover, origins their controversy reviewed, internal connections between two Large Low Shear Velocity Provinces (LLSVPs) lower discussed depth. Further studies on origin evolution suggested, especially using integrated approach Hf‐Nd isotopes.