The University of Southampton
University of Southampton Institutional Repository

Imbalance in the oceanic strontium budget

Record type: Article

Palmer and Edmond [Earth Planet. Sci. Lett. 92 (1989) 11-26] indicated that thermally plausible oceanic hydrothermal inputs of strontium to the oceans are not sufficient to balance the riverine input. It has recently been suggested that off-axis low-temperature hydrothermal circulation may reconcile this discrepancy [e.g. Butterfield et al., Geochim. Cosmochim. Acta 65 (2001) 4141-4153]. Strontium isotope alteration profiles are compiled for sampled in situ ocean and ophiolite crust to calculate a sustainable cumulative hydrothermal flux to the oceanic strontium budget. High-temperature circulation contributes ~1.8 x 109 mol yr-1 of basaltic strontium to the oceans. Enhanced hydrothermal systems in arc-related spreading environments (10% of the crust) may increase this to ~2.3 x 109 mol yr-1. It is shown that low-temperature flow cannot supply the remaining flux required to reconcile the oceanic strontium budget (~8.7 x 109 mol yr-1) because this would require 100% exchange of seawater strontium for basaltic strontium over an 820 m section of MORB-like crust. Currently sampled in situ ocean crust is not altered to this extent. The isotopic alteration intensity of 120 Myr crust sampled in DSDP Holes 417D and 418A indicates that off-axis low-temperature flow may contribute up to ~8 x 108 mol yr-1 of basaltic strontium (9% of that required). The ocean crust can sustain a total basaltic strontium flux of ~3.1+/-0.8 x 109 mol yr-1 (87Sr/86Sr ~0.7025) to the oceans. This is consistent with hydrothermal flux estimates, but remains less than a third of the flux required to balance the oceanic strontium budget. The ocean crust cannot support a higher hydrothermal contribution unless the average ocean crust is significantly more altered than current observation.

Full text not available from this repository.

Citation

Davis, Amy C., Bickle, Mike J. and Teagle, Damon A.H. (2003) Imbalance in the oceanic strontium budget Earth and Planetary Science Letters, 211, (1-2), pp. 173-187. (doi:10.1016/S0012-821X(03)00191-2).

More information

Published date: 15 June 2003
Keywords: strontium isotopes, ocean budget, ocean crust, hydrothermal, ophiolite, odp

Identifiers

Local EPrints ID: 2079
URI: http://eprints.soton.ac.uk/id/eprint/2079
ISSN: 0012-821X
PURE UUID: 35c680e7-f730-4279-8dea-ce37489ac530
ORCID for Damon A.H. Teagle: ORCID iD orcid.org/0000-0002-4416-8409

Catalogue record

Date deposited: 11 May 2004
Last modified: 17 Jul 2017 17:16

Export record

Altmetrics

Contributors

Author: Amy C. Davis
Author: Mike J. Bickle

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.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

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.

×