Geophysical Journal | 2011 volume 33 3

The experimental-methodical geophysical studies in the RV POSEIDON cruise 405

© J. Bialas, S. Mykhaylyuk, A. Vasiliev, I. Klaucke, C. Papenberg, K. Schwalenberg

This work presents the main results of the experimental-methodical geophysical studies in the RV POSEIDON cruise 405 (08.12.2010 - 22.12.2010) in the NW the Black Sea. The cruise POS 405 aims to test new geophysical equipment developed in the frame of the "SUGAR" project. A new ELAC Nautik SBE 3050 Multibeam system was installed during the recent ship yard docking. The Multibeam is capable to record a water column and display gas bubbles on the water column image (WCI) viewer. Successful tests were performed mapping along the shoulders of the Danube canyon. For the first time a new deep towed multichannel streamer was also set up. Intensive system tests with a deep sea winch applied were completed and the first seismic signals were recorded. After an intermediate port call with exchange of scientific crew members a new Controlled Electromagnetic Source System (CSEM) was tested. For the first time a 700 m long receiver array was towed behind the bottom transmitter. Due to weather conditions (wind force up to 25 m/s) the vessel could not operate for a total of 3,5 days of 15 working days. These limitations prevented from intensive profiling with the towed instruments as their deployment and recovery could not be done in such stormy conditions. According to the agreement with the Institute of Geophysics, NAS of Ukraine electromagnetic researches were conducted with the innovative method of analysis of spontaneous electromagnetic radiation (ASEMR) during 15 days.

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