April 2018 | Pre-breakup geology of Jan Mayen revealed by seafloor sampling

New paper by Stéphane Polteau (VBPR) published in Tectonophysics

The Jan Mayen Microplate Complex (JMMC) in the NE Atlantic is interpreted to mostly consist of continental fragments with possible interstitial embryonic oceanic crust. A complex Cenozoic rifting history accompanied by extensive extrusive and intrusive volcanism have made the geological characterization of the JMMC challenging especially due to poor seismic imaging beneath the breakup basalt succession.

April 2018 | Ice-stream dynamics revealed by P-Cable 3D seismic

New paper by Benjamin Bellwald (VBPR) published in Marine Geology

High-resolution 3D P-Cable is a useful tool for imaging glacial landforms. The seismic data allow to study the link between seabed morphology and underlying geology. A buried shear margin moraine was imaged, and buried glacial horizons can be mapped at MBE-quality using the P-Cable technology . Meter-scale glacial deposits can be imaged using seismic attribute maps.

February 2018 | Gas Hydrate studies at Nyegga

New paper published in Nature

Large amounts of methane are stored in continental margins as gas hydrates. They are stable under high pressure and low temperature, but react sensitively to environmental changes. Bottom water temperature and sea level changes were considered as main contributors to gas hydrate dynamics after the last glaciation. However, here we show with numerical simulations that pulses of increased sedimentation dominantly controlled hydrate stability during the end of the last glaciation offshore mid-Norway.