Multicorer
The Multicorer ( MUC for short ) is a marine geological sampling device for use on research vessels . It can be used to “punch” sediment samples from the seabed .
description
The multicorer usually consists of an outer frame and an inner, vertically movable head. The frame is used to protect the device. The feet with which the device touches the seabed are also attached to it. The head consists of a number of vertically mounted tubes, usually made of a transparent plastic , which allows an initial visual inspection of the sediment obtained. In addition, a closure flap is mounted for each pipe at the top and bottom.
functionality
The multicorer is prepared by first installing the sampling tubes in their holders. The closing flaps of the individual tubes are opened and locked: the multicorer is "tensioned", the device is ready for use. Now the device is raised to a cable, a securing bolt is removed and the corer is drained on the wire rope hanging to the seabed ( eased ). This is where the outer frame touches its feet. To prevent sinking in, different feet can be fitted depending on the nature of the sediment. The internal head with the pipes moves further through mounted weights and pushes the pipes into the sediment.
The multicorer is then heaved . The locked flaps are unlocked and the tubes are closed at the top and bottom. The device is brought on board and secured. The pipes filled with sediment and the water enclosed above the sediment can be obtained in this way without turbulence. The sediment forms a chronological sequence of deposits. The pipes are removed and taken to the laboratory for scientific studies .