FOCUS NGU FOCUS NO.6 APRIL 2015
PL E A
BARENTS SEA AEROMAGNETIC REMAPPING (BASAR-14)
The Geological Survey of Norway (NGU) has carried out a new acquisition of aeromagnetic data in the Southeastern Barents Sea in order to determine the first order geological features. The survey comprises an area of approx. 46,000 km² in the Southeastern Barents Sea between the Fedynsky High and the Nordkapp Basin (see map on the next page). Profile and tie line spacings of the survey are 2 km and 5 km, respectively. The data acquisition was accomplished in October 2014. For the 3D seismic areas additional acquisition with denser profile distance of 1 km will be carried out in April/ May 2015.
Aeromagnetic surveys are useful for detailed mapping of salt features, fracture systems, magmatic intrusions and to estimate the depth to magnetic basement. This information provides a structural overview of the area and is valuable for further survey planning like seismic, gravity, MT or CSEM data acquisition.
The new BASAR-14 survey constitutes a part of an aeromagnetic remapping programme of the Norwegian continental shelf and adjacent ocean areas. Combined with previous NGU’s BASAR surveys (BAS-06, BASAR-08 and BASAR-09) the planned acquisition will provide a comprehensive and state-of-the-art aeromagnetic data-set of the Southeastern Barents Sea.
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DELIVERABLES Maps • Aeromagnetic total field data-sets • Depth to magnetic sources • Free air, Bouguer gravity maps • Filtered magnetic gravity maps • Combined interpretation maps • Magnetic modelling along key transects • 3D potential field modelling* • Geodynamic interpretation Reports • Processing report • Interpretation report (*)Optional; requires access to the NPD seismic survey of the Southeastern Barents Sea
TECHNICAL SPECIFICATIONS
Outline of the aeromagnetic survey BASAR-2014 in the southeastern Barents Sea with 3D seismic areas covered with denser line spacing
Line/tie-line spacing:
2/6 km
Line/tie-line spacing:
2 km / 5 km 1 km / 5 km for 3D seismic areas
Sensor elevation:
approx. 230 m
Total area coverage:
~46,000 km2
Total flying distance:
~44,000 km
Aeroplanes:
Piper Chieftain
Magnetometer:
Scintrex Cesium Vapour
Noise envelope:
±0.1 nT
Sensor:
CS-3 mounted in towed bird
SPONSORS NGU, NPD, Det norske, Eni, Statoil, Total
ORDERING: Price 1,164,000 NOK
MORE INFORMATION?
LAURENT GERNIGON
MARCO BRÖNNER Senior Researcher, Continental Shelf Geophysics marco.bronner@ngu.no Tel: +47 73 90 44 75
Senior Researcher, Continental Shelf Geophysics laurent.gernigon@ngu.no Tel: +47 73 90 44 37
NGU - GEOLOGICAL SURVEY OF NORWAY CONTACT ADDRESS
VISITING ADRESS
SOCIAL MEDIA
PO Box 6315 Sluppen NO-7491 Trondheim Phone: +47 73 90 40 00
Leiv Eirikssons vei 39, Trondheim E-mail: ngu@ngu.no www.ngu.no /continental_shelf_geophysics
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