Geophysical data acquisition - OGS

(GO). The energizing systems were an Isotta gun and PWD. In the Mica project
127 transepts of 20-channels have been acquired, for a total amount of 994
points, while in Iamiano the acquirement grid was provided by 600 channels
and 530 energization points.
• Integrated metodology in the Mica project. Combined to the high resolution
seismic, the two sites of S. Pier d’Isonzo and Iamiano were characterised using
GPR, ERT (earth resistivity tomography) and magnetometry. The 2D
resistivity profiles had length from 31 to 315 m.
• TRUCK Project. In February 2000, for the AGIRE srl society a magnetic survey
was carried out on an area near PERPIGNAN (F). The aim of the survey was
the determination of magnetic anomalies connected with the supposed
presence of a buried vehicle. The area was delimited with a total station
SOKIA. The vertexes of the area were joined with the local topography. The
high-resolution magnetic acquisition was carried out with a portable cesium
gradiometer GEOMETRICS mod. G-858 along parallel profiles with a 2-m
range. Magnetic data were reduced by the field reference model IGRF 2000.
• KRSKO High Resolution. In February 2000 three high-resolution seismic
profiles, with a total length of 4 km were recorded in the surroundings of the
KRSKO nuclear-power plant (SLO). This acquisition was performed in the
framework of the EU-programme PHARE to complete data acquired in 1999.
• Project LARSEN. The NSF project “Paleohistory of the Larsen Ice Shelf:
Evidence from the Marine Record”, with the aim of reconstructing the
history and collecting sedimentological, biostratigraphical, biological and
oceanographical information on the environmental change of the sea floor in
the area that, until five years ago was still covered by the Larsen ice platform
(Eastern part of the Anctartic peninsula). Among the various applied surveys
the group took part in data acquisition with multibeam echosounder, Side
Scan Sonar and monochannel reflection seismic. The expedition has been
carried out in May 2000, on the icebreaker N.B. Palmer (USA).
• Extended Program Geophysical Research in the surroundings of the Krsko
NPP. Three new seismic lines were made with a double purpose: to clarify the
position of some faults zones and correlate the seismic data with logs of the
drill hole Drnovo 1.
• Project STRATAGEM. Research project with the R/V research ship Dana, in
three different investigation areas. In one of these, the Faeroe-Shetland
margin, the main aim was the construction of a mid –to late Cenozoic
stratigraphic framework for the Faeroe-Shetland and the setting up an
evolution model for the Faeroe-Shetland margin, with particular emphasis on
the development of shelf-margin progradational wedges. During the fieldwork
4 monochannel high-resolution reflection profiles have been recorded, for a
total amount of 300 km. The acquisition system was composed by a GI-Gun
(90 in 3 ) checked by a Real Time System Sure Shot, one streamer with an array
of 10 Hydrophones 1.6 m space and one recording system Elics Delph-2x. The
positioning was supplied by SHIPMATE GPS equipped with differential GPS
corrector.
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