Crustal Structures Across The Northern Scandinavia Along The SENJA OBS SURVEY Profile
- 1Istanbul Technical University, Eurasia Institute of Earth Science, GEodynamics, Türkiye (alemdar20@itu.edu.tr)
- 2Centre for Earth Evolution and Dynamics, University of Oslo, Oslo, Norway
- 3Department of Earth Science, University of Bergen, Bergen, Norway
- 4China University of Geosciences, School of Earth Sciences, Wuhan, China
- 5GEOMAR Helmholtz Center for Ocean Research, Section of Marine Geodynamics, Kiel, Germany
- 6Stanford University, Department of Geophysics, CA 94305, USA
The Senja onshore-offshore seismic profile is located in the north-western part of Europe across the Norwegian coast into the North Atlantic ocean. A number of terranes and microcontinents collided to form this region from the Archean to the Paleoproterozoic. The Sveconorwegian (Grenvillian) and Caledonian orogenies significantly affected this region and created the major Caledonian mountain belt. Despite being far from any active plate boundaries, the Baltic Shield contains a mountain range called the Scandes that reaches heights of up to 2500 meters. This mountain range is oriented northeast-southwest and mainly correlates with the deformed Caledonian and Sveconorwegian part of the western North Atlantic coastal region.
We present a crustal scale seismic profile along the northwest-to-southeast-directed Senja OBS Survey Profile in northern Scandinavia between 12°E and 20°E. This profile extends offshore and onshore for a total of ~300 kilometres across the Norwegian shelf in the North Atlantic Ocean, the Senja Island and into mainland Norway. The seismic sources were airgun shots from the vessel Hakon Mosby along the offshore profile. The seismic data set was collected by 68 onshore stations located at 1.3 kilometer distance and 5 ocean bottom seismometers located on the shelf, slope, and within the oceanic environment. The results of this investigation will provide new data for interpretation of the cause of the unusual onshore topography and offshore bathymetry at the North Atlantic Ocean's edge. We present the results from ray tracing modelling of a seismic P-wave velocity section along the profile.
How to cite: Alemdar, R. E., Kahraman, M., Shulgin, A., Mjelde, R., Artemieva, I., and Thybo, H.: Crustal Structures Across The Northern Scandinavia Along The SENJA OBS SURVEY Profile , EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-15662, https://doi.org/10.5194/egusphere-egu23-15662, 2023.
