The University of Southampton
University of Southampton Institutional Repository

A three-dimensional study of a crustal low velocity region beneath the 9,3'N overlapping spreading center

Bazin, S. and Sinha, M.C. (2003) A three-dimensional study of a crustal low velocity region beneath the 9,3'N overlapping spreading center Geophysical Research Letters, 30, (2), 1039-[4pp]. (doi:10.1029/2002GL015137).

Record type: Article


Overlapping spreading centers (OSCs) play a key role in models of magma distribution at fast spreading ridges. To investigate the relationship between ridge-axis discontinuities and magma supply, we conducted a three-dimensional seismic reflection and tomography experiment at the 9°03?N OSC along the East Pacific Rise. Tomographic analysis imaged a broad mid-crustal low velocity zone (LVZ) beneath parts of the overlapper and the associated overlap basin, demonstrating that it is magmatically robust. The complementary datasets reveal a complex storage and tapping of melt: the LVZ and melt sill at either end of the overlap basin are not simply centered beneath the rise crest but are skewed inwards. The subsequent focussing of the LVZ and sill beneath the axis of the eastern limb appears to be due to melt migration toward the tip. The OSC western limb is less magmatically robust and may be in the process of dying.

Full text not available from this repository.

More information

Published date: 2003
Organisations: Ocean and Earth Science


Local EPrints ID: 2227
ISSN: 0094-8276
PURE UUID: f6f09724-c799-4087-b3bb-1aff7100b336

Catalogue record

Date deposited: 20 May 2004
Last modified: 17 Jul 2017 17:15

Export record



Author: S. Bazin
Author: M.C. Sinha

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton:

ePrints Soton supports OAI 2.0 with a base URL of

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.