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Scientific Drilling The open-access ICDP and IODP journal
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Sci. Dril., 23, 29-37, 2017
https://doi.org/10.5194/sd-23-29-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Technical development
30 Nov 2017
Design and deployment of autoclave pressure vessels for the portable deep-sea drill rig MeBo (Meeresboden-Bohrgerät)
Thomas Pape1,2, Hans-Jürgen Hohnberg2,3, David Wunsch3, Erik Anders3, Tim Freudenthal2, Katrin Huhn2, and Gerhard Bohrmann1,2 1Department of Geosciences at the University of Bremen, Klagenfurter Str. 4, 28359 Bremen, Germany
2MARUM – Center for Marine Environmental Sciences at the University of Bremen, Leobener Str. 8, 28359 Bremen, Germany
3Corsyde International GmbH & CO. KG, Reuchlinstr. 10–11, 10553 Berlin, Germany
Abstract. Pressure barrels for sampling and preservation of submarine sediments under in situ pressure with the robotic sea-floor drill rig MeBo (Meeresboden-Bohrgerät) housed at the MARUM (Bremen, Germany) were developed. Deployments of the so-called MDP (MeBo pressure vessel) during two offshore expeditions off New Zealand and off Spitsbergen, Norway, resulted in the recovery of sediment cores with pressure stages equaling in situ hydrostatic pressure. While initially designed for the quantification of gas and gas-hydrate contents in submarine sediments, the MDP also allows for analysis of the sediments under in situ pressure with methods typically applied by researchers from other scientific fields (geotechnics, sedimentology, microbiology, etc.). Here we report on the design and operational procedure of the MDP and demonstrate full functionality by presenting the first results from pressure-core degassing and molecular gas analysis.

Citation: Pape, T., Hohnberg, H.-J., Wunsch, D., Anders, E., Freudenthal, T., Huhn, K., and Bohrmann, G.: Design and deployment of autoclave pressure vessels for the portable deep-sea drill rig MeBo (Meeresboden-Bohrgerät), Sci. Dril., 23, 29-37, https://doi.org/10.5194/sd-23-29-2017, 2017.
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Pressure coring is currently the only method that enables precise off-site analysis of gas and gas-hydrate volumes in marine sediments. Pressure barrels for sampling and preservation of submarine sediments under in situ pressure with the robotic sea-floor drill rig MeBo (MARUM, Bremen, Germany) were developed. Here we report on the design and operational procedure of the so-called MDP during two seagoing cruises and demonstrate functionality by presenting results from pressure core degassing.
Pressure coring is currently the only method that enables precise off-site analysis of gas and...
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