The Geology of the Norwegian Sea Continental Margin and Probable Similarities with the Jan Mayen Ridge

Harald Brekke, Robert W. Williams & Christian Magnus Barents Sea

Norwegian Continental Shelf Structure map

Norwegian Sea

North Sea Structural Elements of the Norwegian Sea Continental Margin General Basin Development Regional Geoseismic Sections – Vøring Basin Regional Profiles Regional Geoseismic Profiles – Western Vøring Basin

Regional Geoseismic Sections – Møre Basin

Base Cretaceous TWT Geisesimic Sections – Eastern Flank of Vøring Basin

Geoseismic Sections – Eastern Flank of Møre Basin

Eastern Basin Flank of Møre Basin Regional Stratigraphy Norwegian Sea Tectonic History

Tektonisk skjema, kritt- tertiær Geoseismic Sections – Basin Deformation

Base Coniacian Sills and Inner Flows Sills and Inner Flows Base Cretaceous TWT

Inner Flows Model Palaeogeography Where does Jan Mayen MC Fit? Plate Reconstruction By simple de - rifting

L E G E N D RIFTING EPISODE ACCUMULATED EXTENSION IN THE NORWGIAN SEA Maastrrichtian Eocene 45 km

M. Jurassic- 80 km E. Cretaceous Relative Carboniferous 135 km Triassic Magnitude of Major Rifting Phases

Fig.3

MHe 10.12.99 RL9904011 53Ma Anomaly 24

Structural Elements of the Norwegian Sea Continental Margin Colour legend for stratigraphy and palaeogeography Carboniferous Palaeogeography Carboniferous Palaeogeography Permian Palaeogeography Permian Palaeogeography Triassic Palaeogeography Triassic Palaeogeography Jurassic Palaeogeography Jurassic Palaeogeography Arctic PlateTectonics Cretaceous Palaeogeography

EARLY CAMPANIAN Cretaceous Palaeogeography

EARLY CAMPANIAN Southern Hatton Bank

Plio-Pleistocene

Albian

Hitchen 2004 Hatton Bank, Deformed Mesozoic Sequence

Hitchen 2004 Breakup Palaeogeography

EARLY PALAEOCENE MID/LATE PALAEOCENE Breakup Palaeogeography

EARLY PALAEOCENE MID/LATE PALAEOCENE Breakup Palaeogeography Breakup Palaeogeography Crustal Transect Correlations OBS Crustal Transects Line 5-00

Raum et al. 2005 Line 6-00

Raum et al. 2005 Line 8A-96

Mjelde et al. 2008 Line 1-00

Breivik et al. 2006 Palinspastic Crustal Transects

Present

25 Ma

Mjelde et al. 2008 Palinspastic Crustal Transects (contd)

52 Ma 55 Ma

Mjelde et al. 2008 Jan Mayen Crustal Transect (Line 4-95)

Kuvaas & Kodaira 1997 Jan Mayen Crustal Transect (Line 4-95)

Kuvaas & Kodaira 1997 Jan Mayen Seismic Profiles JM-32-85 W E

DSDP site 349 New sites Late Oligocene Middle Eocene

Middle Eocene?

Lower Eocene?

Top paleocene? JM-4-85 w E JM-4-85 w E JM-17-84

E W JM-17-84

E W JM-20-85

E W Regional Stratigraphy Conclusive Remarks

 Until Cretaceous JMMC occupied central parts of the rifting region between Greenland and Scandinavia  In Cretaceous, JMMC was part of the western flanking platform of the Møre Basin, becoming the northern extension of the Hatton-Rockall-Faroe block  Probably most of the post-Devonian strata preserved in parts of JMMC  However, uncertainties about periods of emergence and submergence  Probably a substantive hiatus in Palaeocene