Seismic transect across the Lomonosov and Mendeleev Ridges: Constraints on the geological evolution of the Amerasia Basin, Arctic Ocean
Article first published online: 3 OCT 2013
©2013. American Geophysical Union. All Rights Reserved.
Geophysical Research Letters
Volume 40, Issue 19, pages 5047–5051, 16 October 2013
How to Cite
2013), Seismic transect across the Lomonosov and Mendeleev Ridges: Constraints on the geological evolution of the Amerasia Basin, Arctic Ocean, Geophys. Res. Lett., 40, 5047–5051, doi:10.1002/grl.50975., , and (
- Issue published online: 31 OCT 2013
- Article first published online: 3 OCT 2013
- Accepted manuscript online: 22 SEP 2013 11:42PM EST
- Manuscript Accepted: 18 SEP 2013
- Manuscript Revised: 16 SEP 2013
- Manuscript Received: 25 JUL 2013
- Makarov Basin;
 We report on seismic and petrological data that provide new constraints on the geological evolution of the Amerasia Basin. A seismic reflection transect across the Makarov Basin, located between the Mendeleev and Lomonosov Ridges, shows a complete undisturbed sedimentary section of Mesozoic/Cenozoic age. In contrast to the Mendeleev Ridge, the margin of the Lomonosov Ridge is wide and shows horst and graben structures. We suggest that the Mendeleev Ridge is most likely volcanic in origin and support this finding with a 40Ar/39Ar isotopic age for a tholeiitic basalt sampled from the central Alpha/Mendeleev Ridge. Seismic reflection data for the Makarov Basin show no evidence of compressional features, consistent with the Lomonosov Ridge moving as a microplate in the Cenozoic. We propose that the Amerasia Basin moved as a single tectonic plate during the opening of the Eurasia Basin.