CONCLUDING REMARKS AND FUTURE WORKS

Main targets of MARMARA2009 cruise have been reached. A schematic list of first results is indicated.

• Recovery of the SN4 observatory Th SN4 Observatory was found to be overturned on bottom and to be moved twice by 40-50m SE of the deployment site of the MARM10_01 cruise with R/V Yunus, during the second half of september. The system have been located by the multibeam and by three ROV dives. The last ROV dive was able to drive a hook into the frame and the SN4 was recovered by ship's winch.

• Sampling of the seabed The seabed have been sampled by ISMAR gravity corers and turkish Water/sediment corers, that were also used for preserving the uppermost veneer and overlying waters. On one 6m pipe of the ISMAR corer 6 temperature sensors were installed at different lengths along the pipe, for heat flow and thermal conductivity measurements. The pore waters were collected within few hours from the recovery by the Rhizone method, employing syringes and 0.1 $\mu$m filter. The so collected pore waters have been store in deep-freezer and liquid N. The cores and water samples will be used for fluid migration analysis.

• ROV survey Apart from the dives on the SN4, we launched the ROV on the gulf of Gölcük  close to the 1999 earthquake rupture visible at the seafloor just S of the NAF, and on some sites potentially interesting for gas and fluid emissions. Those emissions were somewhere detected as anomalous reflections of the sonars in the water column and subsequently investigated using the 300 KHz ADCP.

• Geophysical data

  First results highlighted the high-resolution of the MB and the Chirp system on board of Urania that fitted perfectly the requirement of accuracy in mapping the subtle trace of active faults in the Sea of Marmara.

Analysis of the data collected during the expedition is under process, and will continue during the forthcoming several months.

No problems were encountered regarding neither the people nor the environment during the cruise.