Abstract
In 1995 geophysical investigations in the southern part of the AP-1
geotraverse across the whole Barents Sea Plate were completed. The
entire profile links the super-deep SG-3 well on the Kola peninsular
(town of Zapolarny) and the base Hayes-1 well on Franz-Joseph Land.
The extent of the investigated part of the profile was 700 km. The
integrated seismic experiment included offshore and onshore wide-angle
reflection/refraction observations (referred hereinafter as Deep
Seismic Sounding, DSS) with 3-component ocean bottom seismographs
(OBS) and air guns and multi-channel seismic reflection study (MCS)
at different offsets ranges. Sufficiently dense deployment of OBS
(5-20 km) and a 250 m shooting interval provided reliable phase correlation
and wave identification. Intensive reflections from the Moho have
been recorded practically continuously along the profile. The DSS
data processing built a mid point dynamic reflection Moho image and
produced a general depth section. MCS data defined boundaries in
the sedimentary layer and the basement surface in the southern part
of the profile. The lowermost observed boundary, the Moho, occurs
at depths between 35 and 40 km. The thickness of sedimentary cover
varies from zero in the southern part of the profile to 14-16 km
in its northern part. Results of geological interpretation confirm
the continental crust in the studied part of the Barents Sea Shelf
Plate.
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