Evolution of the Norwegian-Greenland Sea

Talwani, Manik; Eldholm, Olav

doi:10.1130/0016-7606(1977)88<969:eotns>2.0.co;2

Cited by 721 publications

(382 citation statements)

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“…This was accompanied by a change in the relative plate motion between the European and North American plates from NNWdSSE to NWeSE. Spreading along the Aegir Ridge decreased gradually and the ridge became extinct at~25 Ma (magnetic anomaly 6e7, Talwani and Eldholm, 1977;Tessensohn and Piepjohn, 2000;Mosar et al, 2002). The spreading along the Aegir Ridge was accompanied by simultaneous continental rifting on East Greenland from about 43.5 Ma until the Kolbeinsey spreading rift initiated at around 24 Ma (Mjelde et al, 2008a).…”

Section: Tectonic Settingmentioning

confidence: 99%

“…1). During this phase, spreading along the northern Mid-Atlantic Ridge was simultaneous with spreading in the Labrador sea (Talwani and Eldholm, 1977;Tessensohn and Piepjohn, 2000). Voluminous magmatic activity accompanied the separation of Norway and Greenland, leading to the formation of thicker oceanic crust.…”

Section: Tectonic Settingmentioning

confidence: 99%

“…Talwani and Eldholm, 1977;Cande and Kent, 1995). Oceanic spreading lasted around 20 myr (until~33 Ma, magnetic anomaly 13a) at the Reykjanes, Aegir and Mohns Ridges (Fig.…”

Section: Tectonic Settingmentioning

confidence: 99%

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Vp/Vs-ratios and anisotropy on the northern Jan Mayen Ridge, North Atlantic, determined from ocean bottom seismic data

et al. 2015

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a b s t r a c tIn order to gain insight into the lithology and crustal evolution of the northern Jan Mayen Ridge, North Atlantic, the horizontal components of an Ocean Bottom Seismometer (OBS) dataset were analyzed with regard to Vp/Vs-modeling and seismic anisotropy. The modeling suggests that the northernmost part of the ridge consists of Icelandic type oceanic crust, bordered to the north by anomalously thick oceanic crust formed at the Mohns spreading ridge. The modeled Vp/Vs-ratios suggest variations in gabbroic composition and present-day temperatures in the area. Anisotropy analysis reveals a fast S-wave component along the Jan Mayen Ridge. This pattern of anisotropy is most readily interpreted as dikes intruded along the ridge, suggesting that the magmatism can be related to the development of a leaky transform since Early Oligocene.

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Section: Tectonic Settingmentioning

confidence: 99%

Section: Tectonic Settingmentioning

confidence: 99%

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Vp/Vs-ratios and anisotropy on the northern Jan Mayen Ridge, North Atlantic, determined from ocean bottom seismic data

et al. 2015

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“…The WSFTB formed along the transform plate boundary between Greenland and the western Barents Sea dur− ing Paleocene-Eocene breakup in the North Atlantic (e.g. Talwani and Eldholm 1977;Faleide et al 2008). Approximately 10-40 km margin−perpendicular short− ening (e.g.…”

Section: Geological Setting Of Southern Spitsbergenmentioning

confidence: 99%

The recognition of transient compressional fault slow−slip along the northern shore of Hornsund Fjord, Sw Spitsbergen, Svalbard

Štemberk¹,

Briestenský²,

Cacoń³

2015

Polish Polar Research

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This paper presents the results of direct 3−D fault displacement monitoring along the northern shore of Hornsund Fjord, SW Spitsbergen, Svalbard. The fault displacements have been recorded using three permanently installed optical−mechanical crack gauges since 2009. The monitoring data from all three sites provided evidence for a remarkable slip event that lasted from September 2011 to May 2012. The cause is discussed in some detail with consideration given to both exogenic (temperature changes, surface processes) and endogenic processes (isostatic rebound and regional seismicity). It is proposed that tran− sient fault slips recorded had a tectonic origin and were caused by approximately W−E ori− ented compression corresponding to regional compression in the Svalbard area.

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“…1) occurred at the Paleocene-Eocene transition and took place in two stages, reflecting the change from a three-to twoplate configuration (e.g. Talwani and Eldholm 1977). During the first stage the region between Greenland and Svalbard ( Fig.…”

Section: Introductionmentioning

confidence: 99%

The Cenozoic western Svalbard margin: sediment geometry and sedimentary processes in an area of ultraslow oceanic spreading

et al. 2011

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The northeastern high-latitude North Atlantic is characterised by the Bellsund and Isfjorden fans on the continental slope off west Svalbard, the asymmetrical ultraslow Knipovich spreading ridge and a 1,000 m deep rift valley. Recently collected multichannel seismic profiles and bathymetric records now provide a more complete picture of sedimentary processes and depositional environments within this region. Both downslope and alongslope sedimentary processes are identified in the study area. Turbidity currents and deposition of glacigenic debris flows are the dominating downslope processes, whereas mass failures, which are a common process on glaciated margins, appear to have been less significant. The slide debrite observed on the Bellsund Fan is most likely related to a 2.5-1.7 Ma old failure on the northwestern Barents Sea margin. The seismic records further reveal that alongslope current processes played a major role in shaping the sediment packages in the study area. Within the Knipovich rift valley and at the western rift flank accumulations as thick as 950-1,000 m are deposited. We note that oceanic basement is locally exposed within the rift valley, and that seismostratigraphic relationships indicate that fault activity along the eastern rift flank lasted until at least as recently as 1.5 Ma. A purely hemipelagic origin of the sediments in the rift valley and on the western rift flank is unlikely. We suggest that these sediments, partly, have been sourced from the western Svalbard-northwestern Barents Sea margin and into the Knipovich Ridge rift valley before continuous spreading and tectonic activity caused the sediments to be transported out of the valley and westward.

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Evolution of the Norwegian-Greenland Sea

Cited by 721 publications

References 0 publications

Vp/Vs-ratios and anisotropy on the northern Jan Mayen Ridge, North Atlantic, determined from ocean bottom seismic data

Vp/Vs-ratios and anisotropy on the northern Jan Mayen Ridge, North Atlantic, determined from ocean bottom seismic data

The recognition of transient compressional fault slow−slip along the northern shore of Hornsund Fjord, Sw Spitsbergen, Svalbard

The Cenozoic western Svalbard margin: sediment geometry and sedimentary processes in an area of ultraslow oceanic spreading

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