SCANLIPS3D - SCANdinavian LIthosphere P and S wave experiment 3 D

Abstract

The SCANLIPS 3D experiment deployed 20 ESP seismometers in northern central Norway and Sweden between June 2013 and September 2014 to investigate the cause of the high topography which dominates Norway and process of topographic uplift. 97% data recovery was achieved. Data quality showed the ESP instruments performed well in comparison to 3T instruments previously deployed in Scandinavia. Over 400 receiver functions were calculated from teleseismic events recorded across the array. Inverse modelling and h-κ stacking of these receiver functions show there is no linear crustal root supporting the present day high topography. A region of thick crust which correlates with a negative residual isostatic gravity anomaly appears to confirm that locally the crust is overcompensated. Comparisons between the surface geology and variations in crustal structure and Moho sharpness suggest that the Caledonian orogeny may have reworked the Proterozoic basement, removing a high velocity lower crustal layer.