Plattform Platform	Reise-Nr. Cruise-No.	Zeitraum Period	Projekt Project	Arbeitsgebiet Working area
Meteor	M111	10.10.2014 - 01.11.2014		Ionian Sea

Fahrtleiter Chief Scientist	Institut Institute	Auslaufhafen Port of departure	Einlaufhafen Port of return	Stationskarte Station map	Schiffsroute Trackchart
Kopp Heidrun	Helmholtz Centre for Ocean Research Kiel (GEOMAR)	Catania	Catania

Ziel der Reise / Objectives of Cruise:

Geophysical investigations of the Calabria subdcution zone and Tethys Margins Data acquisition:OBH/MicrOBS seismics, mini-streamer, multibeam, Parasound The cruise M111 started on October 10, 2014 when FS METEOR left the port of Catania, Italy at 09:00h. The 23 hour transit to our first seismic station on profile DY-P04 was used to test our release units and to conduct a sound-velocity profile using an expendable sound velocity probe (XSV-02) to a depth of 2000m. At 08:00h on Oct. 11, we began deploying 61 Ocean Bottom Seismometers and Hydrophones (OBS/OBH) along profile DY-P04 at an average spacing of 2.8 nm; all instruments (OBH401 to OBS461) were deployed within 26 hours. On Oct. 13, communication with our partners onshore in Italy verified that all onshore stations were ready for recording and that we could commence with the shooting. The air gun array consisting of 6 G-gun clusters with a total volume of 84 l was fired along the 174 nm long spread of seismometers with a trigger interval of 60 s at the ship's average speed of 4.5 kn, resulting in a shot spacing of 110 m. In addition, a 4-channel streamer was deployed on all seismic profiles during cruise M111. Shooting started at 08:00h and was preceded by seismic survey mitigation measures for the protection of marine mammals. Shooting terminated at 06:20h on Oct. 15 and subsequently instruments along profile DY-P04 were recovered. Recovery of OBH 447 failed and will be attempted again on Oct. 31 after the automated time release. All other instruments were recovered by 14:00h on Oct. 17 and have recorded properly. After a short transit to profile DY-P03 we deployed 25 instruments at a spacing of 3.2 nm between Oct. 17, 19:30h and Oct. 18., 06:00h. Shooting above OBH301-325 along this 77 nm long profile was achieved between Oct. 18., 10:00h and Oct. 19., 08:00h. This line was also recorded by the onshore stations installed on Sicily. Instrument recovery commenced on Oct. 19., 10:00h and lasted until Oct. 20., 02:00h. After transit to profile DY-P01 we began instrument deployment on Oct. 20., 10:00h. A total of 52 seafloor stations were spaced at a distance of 3.3 nm along the 317 nm spread, which subsequently was shot starting on Oct. 21., 09:45h. Due to adverse weather conditions with gales up to 10 Bft in the Ionian Sea we interrupted the seismic survey on Oct. 22 at 11:00h and reverted to bathymetric swath mapping of a missing segment in the Ionian Sea seafloor map about 20 nm south of profile DY-P01. Weather conditions calmed on Oct. 23 so that we could recommence shooting and reflection seismic data acquisition along the southwestern segment of DY-P01 starting at 16:00h. Shooting was terminated the following day at 10:30h, followed by instrument recovery. The following morning we continued the recovery of the seafloor stations, which was terminated on Oct. 27, 00:00h. After a four-hour transit to the northern termination of profile DY-P02 we deployed a total of 6 instruments at a spacing of ~6 nm between 04:00-08:00h on Oct. 27. Shooting at 4.5kn commenced at 09:00h at a shot interval of 60 s; the streamer was deployed along the profile. Shooting along the 42 nm long line was terminated at 19:30h the same day, followed by instrument recovery. All 6 instruments were securely recovered by 04:00h, Oct. 28. Subsequently, we sailed south and after a transit of 6.5 hrs laid out 8 instruments spaced at 4 nm along profile DY-P05. This profile covers the Ionian Sea abyssal plain and shooting along the 84 nm transect was conducted between 19:30h on Oct. 28 and 10:00h on Oct. 29. Instrument recovery was completed by 22:00h on Oct. 29. Throughout the night and the following day we conducted swath bathymetric profiles to fill gaps in bathymetric coverage of the region. On the morning of 01.11.14 at 08:00 the pilot entered the R/V METEOR, and soon after R/V METEOR berthed in Catania, terminating cruise M111.

Messungen / Measurements