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

Kandilarov, Aleksandre, Mjelde, Rolf, Flueh, Ernst and Pedersen, Rolf Birger (2015) Vp/Vs-ratios and anisotropy on the northern Jan Mayen Ridge, North Atlantic, determined from ocean bottom seismic data Polar Science, 9 (3). pp. 293-310. DOI 10.1016/j.polar.2015.06.001.

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Abstract

In 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.

Document Type: Article
Additional Information: WOS:000360565200002
Keywords: Continental rifting; Icelandic crust; Jan Mayen Ridge; Ocean bottom seismometers; Oceanic spreading; Seismic anisotropy; Vp/Vs-ratio
Research affiliation: OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-GDY Marine Geodynamics
Refereed: Yes
DOI etc.: 10.1016/j.polar.2015.06.001
ISSN: 1873-9652
Projects: Future Ocean
Date Deposited: 23 Jul 2015 07:48
Last Modified: 01 Nov 2017 00:38
URI: http://eprints.uni-kiel.de/id/eprint/29292

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