INFO APRIL 2015
PL E A
S
W W W E VISIT FOR M .NGU.NO O RE I N FO
DATA COMPILATION 2015
NORWAY BASIN (JAS-05, NB-07 AND JAS-12) Better mapping of the Norway Basin required new surveys on both sides of the pre-existing Aegir Ridge survey (NB-90) acquired by the U.S. Naval Research Laboratory in 1990 (Fig. 1).
MAIN GOALS:
The compilation of the JAS-05, NB-07 and JAS-12 surveys allowed us to refine the tectonic and magmatic evolution of the Norway Basin and adjacent margins. The main faults, structure and magnetic anomalies have be reinterpreted using a systematic comparison between bathymetry, gravity, magnetic patterns and available seismic data.
• To map more precisely the magnetic spreading anomalies and oceanic fracture zones
• To constrain the location of the continentocean boundary
• To test the validity of assumed structural and magnetic features • To provide an updated geodynamic model for the Norway Basin, Møre margin and the Jan Mayen microcontinent. ORDERING: Survey
Area coverage
Flying distance
Price
JAS-05
120,000 km2
32,000 km
1,52 MNOK
NB-07
155,000 km2
38,500 km
1,08 MNOK
JAS-12
80,000 km2
17,600 km
1,30 MNOK
355,000 km2
88,100 km
3,90 MNOK
Sum
WWW.NGU.NO
Figure 1: Outline of the aeromagnetic surveys JAS-05, NB-07 and JAS-12 across the Norway Basin. JMMC: Jan Mayen microcontinent
DELIVERABLES Maps • • • • • • • •
Aeromagnetic total field data-sets Depth to magnetic sources Free air, Bouguer and isostatic gravity maps Filtered magnetic and gravity maps Combined interpretation maps Gravity and magnetic modelling along key transects Combined interpretation with seismic data Geodynamic and tectonic interpretations
Reports • Processing Reports • Interpretation Reports
SPONSORS
TECHNICAL SPECIFICATIONS: Line/tie-line spacing:
5-6/20 km
Sensor elevation:
230 m
Area coverage: ~355,000 km² Total flying distance: ~88,100 km Aeroplane:
Piper Chieftain
Magnetometer:
Scintrex Cesium Vapour MEP410
Noise envelope:
±0.1nT
Sensor:
CS-3 mounted in towed bird
Navigation:
Real time differential GPS
Navigation accuracy:
< 3m
Base of operation:
Jan Mayen, Egilsstadir and Torshavn
Base magnetometer:
Scintrex Envi-mag
NGU, NPD, Chevron, ConocoPhilips, Shell, Statoil, Total, Jardfeingi, Orkustofnun.
MORE INFORMATION?
ODLEIV OLESEN
LAURENT GERNIGON
Team Leader, Continental Shelf Geophysics odleiv.olesen@ngu.no Tel: +47 73 90 44 56
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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