Marine Geophysics and Hydroacoustics

Research Cruises Worldwide

MSM87 IODP NW-Africa

Summary - MSM87 November 17th to November 25th, 2019 Las Palmas (Canary Islands, Spain) - Mindelo (Cape Verde)

A seismic pre-site survey for an International Ocean Discovery Program (IODP) was conducted on Maria S. Merian research cruise MSM87 in order to find a potential drill-site on the Cape Verde Plateau offshore NW Africa.
The IODP pre-proposal ‘Neogene Climate of NW Africa’ suggests investigating: i) NW Af-rican climate in a warmer world, and ii) High productivity ecosystem response to climates different from today.Sediment cores should be retrieved at five locationsoff NW-Africa. more

MSM84 Labrador Glacials

Summary – MSM84 June 18th to July 17th, 2019 St. John’s (Canada) – St. John’s (Canada)

The Labrador shelf, located off the eastern Canadian coast, is a key area for paleoclimate and paleoceanographic research. The Canadian hinterland was covered by the Laurentide Ice Sheet during glacials. During phases of ice melt at the transition from glacials to interglacials, large amounts of fresh water were released into the Labrador Sea and North Atlantic Ocean. This release of fresh water occurred through fjords and adjacent troughs More 

M155 Fogo

Summary M155 - May 26th to June 30th, 2019 Pointe-á-Pitre (Guadeloupe) to Mindelo (Cape Verde)

RV  Meteor-Cruise  M155  realized  two  proposals  with  different  objectives.  The  main  part  of  the cruise was assigned to the proposal ‘The tsunamigenic gravitational flank collapse of Fogo volcano, Cape Verde  Islands’. The cruise contributes to the assessment of poorly constrained and heavily debated  tsunamigenic  potential  of  large  volcanic  island  flank  collapses. The  recent  discovery  of tsunamigenic  deposits  in  the  Cape Verdes  shows  that  Fogo  collapsed  catastrophically  at  ~73  ka, resulting in a mega-tsunami. More 

MSM 82_2 Morphology of the headwall area of the Sahara slide, NW-Africa

Summary – MSM82/2 April 26th to May 14th, 2019 Montevideo (Uruguay) – Las Palmas (Canary Islands, Spain)

Three different proposals were realized in the frame of the cruise MSM82/2. Proposal 1 ‘Morphology of the headwall area of the Sahara Slide, NW-Africa’ from University of Kiel seeks a morphological characterization of the entire headwall area of the Sahara Slide. The importance of submarine landslides for society, economy, and ecology is increasingly being recognized by a large number of scientific disciplines and industries. Submarine landslides present a significant geohazard due to their potential to destroy offshore infrastructure and to trigger significant tsunamis. More 

Sector collapse kinematics and tsunami implications -SEKT

Summary - M154/1 April 3rd to April 25th, 2019 Mindelo (Cape Verde) - Point-á-Pitre (Guadeloupe)

Deep-seated  collapses  of  volcanic  islands  have  generated  the  largest  volume  mass  flows worldwide. These mass flows might trigger mega-tsunamis. The way in which these collapse events are emplaced is poorly understood, even though this emplacement process determines the scale of associated tsunamis. Key questions such as whether they are emplaced in single or multiple events, how they may incorporate  seafloor  sediment  to  increase  their  volume,  and  how  they  are  related  to  volcanic eruption cycles and migration of volcanic centers, remain to be answered. More

Seamount at the Canary Islands

Summary

M146 - Hesse HEnry Seamount Seepage Exploration

 

The aim of expedition M146 HESSE (HEn­ry Se­a­m­ount See­page Ex­plo­ra­ti­on) is Henry Seamount a 126 Ma old extinct volcano southeast of the Canary Island El Hierro in 3600 m water depth. Preliminary results of a Meteor cruise revealed that clam shells more

Western Australian Continental Shelf

SO257 - WACHEIO: Western Australian Climate History from Eastern Indian Ocean Sediment Archives

 

Summary

During Cruise SO257, a Geometrics GeoEel streamer consisting of four solid state sections (32 channels) and one standard 1.7L Generator Injector (GI)-gun were used to acquire 2D high-resolution multichannel seismic data. The aim was to acquire high-resolution shallow seismic data across a number of transects during the cruise. More ...

Grand Banks Area, New Foundland

Summary

On November 18, 1929, a M7.2 earthquake occurred beneath the Laurentian Channel off the coast of Newfoundland. Nearly simultaneously, 12 undersea trans-Atlantic communication cables were severed and within two hours, a devastating tsunami struck the south coast of Newfoundland, claiming 28 lives. Only in 1952, it was understood that a slump-generated turbidity current caused the sequential severance of the cables more

Rio de la Plata, offshore Uruguay

Summary

The waters off Uruguay and Northern Argentina offer the possibility to study sediment transport processes from ‘source-to-sink’ in a relatively small area.  Quickly accumulated sediments are potentially unstable and might be transported downslope in canyons and/or on the open slope. Strong contour currents result in along-slope sediment transport. Within the scope of Meteor-Cruise M78/3 more