The University of Southampton
University of Southampton Institutional Repository

Scratching the surface: estimating dimensions of large igneous provinces

Coffin, M.F. and Eldholm, O. (1993) Scratching the surface: estimating dimensions of large igneous provinces Geology, 21, (6), pp. 515-518. (doi:10.1130/0091-7613(1993)021<0515:STSEDO>2.3.CO;2).

Record type: Article


A study of five major basaltic provinces, including oceanic plateaus, volcanic passive margins, and continental flood basalts, shows that they are voluminous constructions of extrusive igneous rock underlain by intrusive rock. Crustal thickness ranges from 20 to 40 km, and lower crust is characterized by high (7.0-7.6 km/s) seismic velocities. Volumes and emplacement rates derived for two oceanic plateaus, the Ontong Java and Kerguelen-Broken Ridge, reveal short-lived pulses of increased global crustal production and suggest an origin involving the lower mantle. The Ontong Java rate of emplacement may have exceeded the contemporaneous global production rate of the entire mid-ocean ridge system. Despite the importance off large igneous provinces in studies of mantle dynamics and the global environment, scarce age and deep crustal data necessitate intensified efforts in seismic imaging and scientific drilling in a range of such features.

Full text not available from this repository.

More information

Published date: June 1993


Local EPrints ID: 52416
ISSN: 0091-7613
PURE UUID: 19b713c5-3b22-492a-ae0e-aace6aaed2a4

Catalogue record

Date deposited: 26 Jun 2008
Last modified: 17 Jul 2017 14:40

Export record



Author: M.F. Coffin
Author: O. Eldholm

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.