aus dem MARUM und dem Fachbereich Geowissenschaften der ...

MARIA S. MERIAN-Berichte, Cruise 20, Leg 4, Bridgetown – Freeport, 15.3.2012 – 7.4.2012
h) Documentation of the sieving residue meta data within the "SaM-Archive" data base. The sieving
residue itself will be stored at SaM in Wilhelmshaven, and provided on demand for further
taxonomical analyses.
5.5.3 Gravity Corer
A gravity corer with a pipe length of 6 or 12 m and a weight of 1.6 tons was applied to recover
long sediment sequences. Imprints of the manufacturer along the plastic liners were used to retain
the orientation of the core. Once on board, the sediment core was cut into 1-m-sections, closed
with caps on both ends and labelled according to a standard scheme (Fig. 5.4).
During MSM20-4, the gravity corer was used at 24 stations (16x equipped with 6-m- and 8x
with a 12-m-long core barrel). Seventeen coring attempts were successful (70%) with sediment
recoveries between 0.53 and 10.60 m resulting in total core recovery of 61.76 m. One off-mound
core (GeoB 16320-2) was opened on board, described and photographed. The remaining offmound
cores (GeoB 16363-3, GeoB 16384-1) and all coral-bearing sediment cores will be opened
back in the institute. The latter will be scanned by computer tomography before opening. All
sediment cores collected during cruise MSM20-4 will be transported to Bremen and stored in the
MARUM core repository at the University of Bremen. The sediment cores will be opened,
described, and photo-scanned, and further analyses will be done after the cruise at the home
laboratories of the participating institutes.
Fig. 5.4 The core segments were closed with caps on both ends and labelled according to a standard scheme for
GeoB cores of the MARUM.
5.5. MARUM-CHEROKEE ROV
(ROV-Team: Nico Nowald, Götz Ruhland, Klaus Dehning, Maik Wilsenack, Marco
Klann; Observations: André Freiwald, Lydia Beuck, Claudia Wienberg, Dierk Hebbeln)
The MARUM-CHEROKEE is a 1,000 m depth rated, mid-size inspection class ROV, manufactured
by Sub-Atlantic, Aberdeen. It is operated by MARUM since 2001 and was adapted and improved for
scientific use. The ROV has already been deployed on 24 expeditions with a total of 123 dives.
System description - The ROV system consists of three major components: the vehicle, the
winch, and the topside control unit.
Vehicle - Vehicle dimensions are 130 x 90 x 90 cm and the total weight in air is 450 kg. The
system is electrically propelled by four axial thrusters and power consumption is around 12 kW.
Three 230 VAC dimmable LEDs, provide a total light power of 1500 W. For scientific
observation, three cameras are installed on the ROV. The main camera is a Tritech Typhoon
15