We investigated the melting temperatures and phase relations of chondrite materials at high-pressure. The objective of this study is to understand early planetary differentiation processes such as core formation, mantle bulk composition and redox state of primordial mantle in early terrestrial planets. Melting experiments were carried out on natural carbonaceous (origin: Tagish Lake) and enstatite (origin: Sahara) chondrites at high pressure and temperatures using the multi-anvil apparatus. Our results show the effect of volatile on the melting temperature of Tagish Lake (CI2) and Sahara (EH3) with respect to Allende (CV3) meteorite and KLB1, respectively. We established the phase equilibria which can be used to derive a model of accretion and possible core segregation that takes into consideration the stability of carbon and hydrous species along with a Fe-Ni sulfide melt. This result leads to important implications for the evolution of the primordial mantle of terrestrial planets.