HEAT FLOW

The core sampling and geothermal research were carried out with system GRUNT, designed and assembled at the Thermal Exploration Laboratory (NIPIOkeangeofisika), Gelendzhik, Russia. The sea-going part (KADR-1M) incorporates: a) a corer that ensures the recovery of undisturbed sediments, b) a self-recording thermogradiometer (ACTM-1), b) deepwater camera and bathometer for nearbottom water sampling. The shipboard module consists of a programmable control and recording unit ensuring: programming of self recording instruments, readout, visualization, processing, and storage of measurements results. An Automated geotechnical module (NGM-1) was also available for engineer-physical parameter measurements on the cores. Heat flow data were obtained by the separate measurement of the geothermal gradient ($\gamma$, K/m) in sediments,and bottom sediment conductivity ($\lambda$, (W/m$^2$K). After penetrating the sediments, system was held in position for a minimum time of 15 minutes to reach equilibrium. As a result of the self-recording geothermal gradient measurements ($\gamma$) and value of the thermal conductivity ($\lambda$), the heat flow density is calculated as $q = -\gamma \lambda ~~(mW/m^2)$.

The Station positions are shown in Tab.6 and in Fig.5.

Table 6: Heat flow Station position.

LAT	LONG	DEPTH	STATION	DATE
-54:34.1	-05:59.0	1860	HF-01	1996-03-30
-54:15.1	-05:00.1	2640	HF-02	1996-03-31
-53:58.7	-03:28.8	2157	HF-03	1996-04-01
-54:43.0	00:04.0	811	HF-04	1996-04-12
-54:58.5	01:18.0	3270	HF-05	1996-04-17