Geophysical data acquisition - OGS

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• Standard 20’ container modified to host the compressor, the high-pressure air control and the airgun workshop, complete with all the required electric wiring. Streamer • 1200 m ITI solid state • Monochannel 3.5 m Geometrics • Single hydrophones and array hydrophones (10 single in array) • Streamer Tester A-2000 • Digicourse streamer position control system • ARDEA streamer winch Recording • OYO DAS-1 recording system, expanded to 96 channels, with three IMB 3480/3490 recording modules. • DELPH II System (version n° 2 seismic channels) DATASONICS - CHIRP-II (sub-bottom profiler) ERT (Earth Resistivity Tomography) • Resistivimeter Syscal-R2, IRIS Instruments • Output : 800V- 2,5A • Ground energization power supply: external - 250W using 12V input - 1200W using 220V input • Multinode System of IRIS, to control from 32 to 256 intelligent nodes GPR (Ground Penetrating Radar) • SIR-2000 GSSI • Antennas: • SUBECHO 35 MHz - SUBECHO 70 MHz - GSSI 100 MHz bistatic - GSSI 200 MHz MAGNETOMETRIC ACQUISITION: • Cesium Gradiometer G-858, Geometrics • Proton Magnetometer G-856, Geometrics The group’s activities are: • Project Tasman Sea. Geophysics research project in the Tasman Sea, with the R/V research ship Polar Duke, in cooperation with BGR of Hannover. Multichannel seismic lines and magnetometry were displayed. • High resolution seismic in Mica. The high-resolution 3D seismic program of the Mica Project has been acquired using the new Summit telemetric acquisition system and comprehends the sites of S. Pier d’Isonzo and Iamiano 11
(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. 12
Page 2 and 3: Istituto Nazionale di Oceanografia
Page 4: Contents Introduction . . . . . . .
Page 7 and 8: Sea, close to the Antarctic Peninsu
Page 10 and 11: Measurements while drilling (data a
Page 12 and 13: Vallazza research well: 3D-RVSP sei
Page 14 and 15: Therefore, having beside a high ele
Page 18 and 19: • Offshore gravimetric survey “
Page 20 and 21: The GPR instruments. Integrated met
Page 22 and 23: Seismic data processing Coordinator
Page 24 and 25: allow for the different spatial sam
Page 26 and 27: Results of application of the stati
Page 28 and 29: Measurements while drilling (R & D)
Page 30 and 31: Wave modeling Coordinator: Géza SE
Page 32 and 33: Phase velocities of the five wave m
Page 34 and 35: (SPEM) and the Wavenumber Integrati
Page 36 and 37: The Marche Microzonation Project is
Page 38 and 39: Seismic inversion Coordinator: Aldo
Page 40 and 41: The joint inversion of direct, refl
Page 42 and 43: Transferring technology from the oi
Page 44 and 45: At the end of the year, we started
Page 46 and 47: ODP Leg 178 - Site Location Site 10
Page 48 and 49: Core 1165B-14H Composite diagram sh
Page 50 and 51: Cenozoic Evolution of the South Ork
Page 52 and 53: Magallanes-Fagnano master fault TWT
Page 54 and 55: (Top): Structural map of the BSRs o
Page 56 and 57: Physical properties of sediment cor
Page 58 and 59: Bathymetric map of the North Atlant
Page 60 and 61: Synthetic Aperture Radar (SAR) remo
Page 62 and 63: Publications Wave modeling ARNTSEN,
Page 64 and 65: Seismic inversion ROSSI, G., AND VE
Page 66 and 67:
TINIVELLA, U. AND LODOLO, E., 2000.
Page 68 and 69:
POLETTO, F., LOVO, M., AND CARCIONE
Page 70 and 71:
REBESCO, M., CITA, M.B., HIEKE, W.,
Page 72 and 73:
Visitors Peter F. BARKER, British A
Page 74 and 75:
About Trieste, Italy Overwiew Tries
Page 76 and 77:
Near Trieste One cannot miss a visi
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Geophysical data acquisition - OGS

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