23-25 September 2013
GEOMAR East shore
Europe/Berlin timezone
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Submarine landslides affecting the Jan Mayen micro-continent, Norwegian-Greenland Sea

Presented by Dr. Jan Sverre LABERG on 24 Sep 2013 from 10:00 to 10:15
Type: Oral presentation, full-paper
Track: Oral presentations

Content

The Jan Mayen micro-continent is located in the Norwegian-Greenland Sea. It forms an up to 30 km wide and relatively flat-topped submarine ridge which narrows and deepens towards the south. The ridge rises 1500 – 2000 m above the surrounding sea-floor and has a length of some 150 km. Its northern termination is defined by the Jan Mayen Fracture Zone that is part of the mid-Atlantic spreading ridge system. Here, both submarine and sub-aerial (on the island Jan Mayen) volcanism occur. Based on newly acquired swath bathymetry data covering most of the ridge, the eastern and western slope morphologies were studied. Preliminary analyses show that the slope includes a number of smaller slide scars (up to some km wide) as well as one up to 50 km wide scar located on the eastern slope. The morphology of the larger slide scar is “fresh” and includes an irregular headwall area and channels that can be followed from the headwall at about 800 m water depth and downslope to at least 2500 m water depth. This morphology is distinctly different from that of the large slide scars along the Norwegian continental margin and in the paper factors that may explain this difference will be discussed.

Place

Location: GEOMAR East shore
Address: Wischhofstr. 1-3 / D-24148 Kiel
Room: Lecture Hall Geb. 8A

Primary authors

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Co-authors

  • K. KAWAMURA Graduate School of Science and Engineering, Yamaguchi University, Japan
  • H. AMUNDSEN Department of Geology, University of Tromsø, Norway
  • K. ANDREASSEN Department of Geology, University of Tromsø, Norway
  • N BAETEN Department of Geology, University of Tromsø, Norway
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