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

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 pa...

Full description

Bibliographic Details
Published in:Polar Science
Main Authors: Kandilarov, Aleksandre, Mjelde, Rolf, Flueh, Ernst, Pedersen, Rolf Birger
Format: Article in Journal/Newspaper
Language:English
Published: Elsevier 2015
Subjects:
Jan Mayen
Jan Mayen Ridge
North Atlantic
Polar Science
Online Access:https://oceanrep.geomar.de/id/eprint/29292/
https://oceanrep.geomar.de/id/eprint/29292/1/1-s2.0-S1873965215300037-main.pdf
https://doi.org/10.1016/j.polar.2015.06.001
Description
Summary: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.

Similar Items