This paper first reports zircon Hf-isotope and trace elemental data of OIB-type mafic samples from Jibutang, Dalong, Comei and Chigu Tso located within the Comei LIP. Considering the whole-rock geochemical and zircon Hf-isotope signatures, this paper proposes that the Dalong gabbroic pluton without contributions from crust and/or sub-continental lithospheric mantle likely represents the pure compositions of plume head of the Comei LIP [⁸⁷Sr/⁸⁶Sr_(t)=0.7047, ε_Nd(t=+1.5, ε_Hf(t=+2.1～+5.7]. These compositions are very similar to those of the basalts from Site 1138 and Bunbury Casuarina in SW Australia that were interpreted to represent the Cretaceous Kerguelen plume head materials. This similarity indicates that the OIB-type mafic rocks in the Comei LIP may be the product of decompression melting of the Kerguelen plume head materials.