Trace element spidergrams for migmatic leucosomes in the UHP metamorphic terrane of North Qaidam in China (Additional file4: Table S3). Black solid curves denote data from Dulan after Yu et al. (2012) and Song et al. (2014), and blue dash-dot curves denote data from Xitieshan after Chen et al. (2012b). Data for the primitive mantle are after McDonough and Sun (1995).