Abstract
An extensive seismic experiment by use of twentyseven three-component Ocean Bottom Seismographs (OBS) was in 1992 conducted in the central and northern part of the Voring basin, northern Norway. Each OBS was deployed several times; a total of 75 OBS deployments along seven profiles with a total length of = 1650 km were thus performed during the acquisition. All profiles were shot where high-quality multichannel reflection profiles have been acquired earlier. The spacing between the OBSs varied from 200 m to about 30 km, and two different seismic air-gun sources were used to optimize the mapping of both deep crystalline and shallow sedimentary structures. 2-D ray-tracing modelling of the regional OBS-data shows that these data contain considerable information about deep sedimentary and crystalline structures, not achievable through the study of multichannel reflection data.
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