High-Resolution Core-Log-Seismic Integration and Igneous Seismic Geomorphology of IODP Expedition 396 Sites on the Mid-Norwegian Margin

The breakup of the Norwegian-Greenland Sea 56 million years ago was associated with massive basaltic magmatism and a short-lived global warming episode, the Paleocene-Eocene Thermal Maximum (PETM). Scientific drilling in 2021 targeted sediments and volcanic rocks on the mid-Norwegian margin to test hypotheses related to the formation of large igneous provinces as well as global warming associated potentially with the igneous activity. High-resolution 3D site survey data facilitated optimal borehole locations during the drilling; key reflections were targeted using the high-resolution 3D data, and PETM stratigraphic intervals were recognized during shipboard core descriptions. Igneous seismic geomorphological interpretation, furthermore, reveals distinct volcanic morphologies on the marginal high, related to different volcanic emplacement environments.