Heat Flow

We performed five heat-flow measurements at locations shown in Fig. 2. Heat flow data were obtained by the separate measurements of the geothermal gradient $g$ (K/m) and conductivity $\gamma W m^{-2} K$ in the sediment. After penetrating the sediment the system was held in position at least 15 minutes to reach equilibrium. The heat flow $q$ is calculated as:

$q = - \gamma \lambda ( mW m^{-2})$

Coordinates, depths and calculated values of $q$ are shown in Tab.1, whereas a simplified sketch of the sediment cores collected during the heatflow measurements are shown in Fig. 6.

Table: Coordinates (ddmm.x) and depths of heat-flow measurements performed during cruise G96 in the Bouvet region. $^*$ no probe penetration, heat-flow values was estimated using near bottom water temperature gradient ($\gamma_{w.b}$) and effective thermal conductivity ( $\lambda_{eff.w}$).

Station	Lat	Lon	Depth	q (mW m$^{-2}$)
HF-01	-5434.1	-0559.0	1860	116.0
HF-02	-5415.1	-0500.1	2640	49.0
HF-03	-5358.7	-0328.8	2157	89.1
HF-04	-5443.0	-0004.0	811	$>$430$^*$
HF-05	-5458.5	-0118.0	3270	116