Thermal conductivities have been measured on-board on the cores in order to determine the thermal conductivity of the sediments. The method of the “hot- needle” has been applied, which consists on the triggering an electric current in a needle. This current releases a certain amount of heat in one impulsion. A temperature sensor inside the needle measures the decrease with time of the temperature straight after the heating; then we can deduce, by the evolution of temperature with time, the thermal conductivity of the sediment.