Continent‐ocean transition on the Vøring Plateau, NE Atlantic, derived from densely sampled ocean bottom seismometer data

Mjelde, Rolf; Raum, T.; Myhren, Bjarte; Shimamura, Hideki; Murai, Yoshio; Takanami, Tetsuo; Karpuz, R.; Næss, Unni

doi:10.1029/2004jb003026

Cited by 81 publications

(123 citation statements)

References 69 publications

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“…Therefore, additional indicators must be considered when estimating the reliability of the final model. Such quality indicators are the signal-to-noise ratio for individual phases and the ray-coverage for different parts of the model (Breivik et al, 2005;Mjelde et al, 2005). The reliability of the Vp/Vs-model will thus depend on the validity of the underlying P-wave velocity model, the data quality of the horizontal components and the uncertainty of the travel-time picks.…”

Section: Uncertainty Estimatesmentioning

confidence: 99%

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: Uncertainty Estimatesmentioning

confidence: 99%

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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“…To the south, the mid-Norwegian Vøring margin is characterized by an increased but along-strike-variable initial ocean crust thickness (e.g., Skogseid and Eldholm, 1995). Packages of SDRS are commonly present at this margin, and the thickness of the LCB varies along strike (Mjelde et al, 2005;Ebbing et al, 2006). At the Møre margin (Fig.…”

Section: Volume Of Magmatismmentioning

confidence: 99%

The North Atlantic Igneous Province: A review of models for its formation

Meyer

Wijk²,

Gernigon³

2007

Special Paper 430: Plates, Plumes and Planetary Processes

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The mantle plume concept is currently being challenged as an explanation for North Atlantic Igneous Province formation. Alternative models have been suggested, including delamination, meteorite impact, small-scale rift-related convection, and chemical mantle heterogeneities. We review available datasets on uplift, strain localization, age and chemistry of igneous material, and tomography for the North Atlantic Igneous Province, and compare them with predictions from the mantle plume and alternative models. The mantle plume concept is quite successful in explaining formation of the NAIP, but unexplained aspects remain. Delamination and impact models are currently not supported. Rift-related small-scale convection models appear to be able to explain volcanic rifted margin volcanism well. However, the most important problem that non-plume models need to overcome is the continuing, long-lived melt anomaly extending via the Greenland-Faeroe Ridges to Iceland. Mantle heterogeneities, resulting from an ancient subducted slab, are included in plate tectonic models to explain the continuing melt production as an alternative to the mantle plume model, but there are still uncertainties related to this idea that need to be solved.

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“…Vøring 99 line AB Mjelde et al (2005Mjelde et al ( , 2007. Note: the line is not labelled on the map (Fig.…”

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Moho and basement depth in the NE Atlantic Ocean based on seismic refraction data and receiver functions

Funck

Geissler

Kimbell

et al. 2016

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Seismic refraction data and results from receiver functions were used to compile the depth to the basement and Moho in the NE Atlantic Ocean. For interpolation between the unevenly spaced data points, the kriging technique was used. Free-air gravity data were used as constraints in the kriging process for the basement. That way, structures with little or no seismic coverage are still presented on the basement map, in particular the basins off East Greenland. The rift basins off NW Europe are mapped as a continuous zone with basement depths of between 5 and 15 km. Maximum basement depths off NE Greenland are 8 km, but these are probably underestimated. Plate reconstructions for Chron C24 (c. 54 Ma) suggest that the poorly known Ammassalik Basin off SE Greenland may correlate with the northern termination of the Hatton Basin at the conjugate margin. The most prominent feature on the Moho map is the Greenland-Iceland-Faroe Ridge, with Moho depths .28 km. Crustal thickness is compiled from the Moho and basement depths. The oceanic crust displays an increased thickness close to the volcanic margins affected by the Iceland plume.Gold Open Access: This article is published under the terms of the CC-BY 3.0 license.

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Continent‐ocean transition on the Vøring Plateau, NE Atlantic, derived from densely sampled ocean bottom seismometer data

Cited by 81 publications

References 69 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 North Atlantic Igneous Province: A review of models for its formation

Moho and basement depth in the NE Atlantic Ocean based on seismic refraction data and receiver functions

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