The University of Southampton
University of Southampton Institutional Repository

The chemistry of hydrothermal fluids from the Broken Spur site, 29°N Mid-Atlantic ridge

The chemistry of hydrothermal fluids from the Broken Spur site, 29°N Mid-Atlantic ridge
The chemistry of hydrothermal fluids from the Broken Spur site, 29°N Mid-Atlantic ridge
Hydrothermal fluids have been collected from three high temperature (360–364°C) vents from Broken Spur (29°10.08?N, 43°10.46?W; water depth ? 3100 m). This is only the fourth site on a slow spreading ridge from which such fluids have been collected. Compared to other vent sites, the hydrothermal fluids are enriched in Li (1035 ?M) and have lower dissolved Mn (?250 ?M) and Sr (43 ?M) concentrations. The boron isotope systematics indicate that substantial removal (>50%) of seawater B has occurred in the low-temperature portion of the hydrothermal convection cell. In addition, low temperature removal of seawater Sr is ?10% greater at Broken Spur compared to similar vent sites in the Pacific where spreading rates are faster. A low Eu anomaly (11 ± 3) and a View the MathML source ratio (10.8) intermediate between pristine and weathered basalt suggest that the vent fluids have interacted with a component of basalt that has previously undergone low-temperature weathering. the fluids are 14% depleted in Cl relative to seawater. Supercritical phase separation appears to be the only reasonable process that may account for the fluid depletion.
0016-7037
651-659
James, R.H.
79aa1d5c-675d-4ba3-85be-fb20798c02f4
Elderfield, H.
fe3fae5f-0b4b-4741-a100-3aaa75568f06
Palmer, M.R.
d2e60e81-5d6e-4ddb-a243-602537286080
James, R.H.
79aa1d5c-675d-4ba3-85be-fb20798c02f4
Elderfield, H.
fe3fae5f-0b4b-4741-a100-3aaa75568f06
Palmer, M.R.
d2e60e81-5d6e-4ddb-a243-602537286080

James, R.H., Elderfield, H. and Palmer, M.R. (1995) The chemistry of hydrothermal fluids from the Broken Spur site, 29°N Mid-Atlantic ridge. Geochimica et Cosmochimica Acta, 59 (4), 651-659. (doi:10.1016/0016-7037(95)00003-I).

Record type: Article

Abstract

Hydrothermal fluids have been collected from three high temperature (360–364°C) vents from Broken Spur (29°10.08?N, 43°10.46?W; water depth ? 3100 m). This is only the fourth site on a slow spreading ridge from which such fluids have been collected. Compared to other vent sites, the hydrothermal fluids are enriched in Li (1035 ?M) and have lower dissolved Mn (?250 ?M) and Sr (43 ?M) concentrations. The boron isotope systematics indicate that substantial removal (>50%) of seawater B has occurred in the low-temperature portion of the hydrothermal convection cell. In addition, low temperature removal of seawater Sr is ?10% greater at Broken Spur compared to similar vent sites in the Pacific where spreading rates are faster. A low Eu anomaly (11 ± 3) and a View the MathML source ratio (10.8) intermediate between pristine and weathered basalt suggest that the vent fluids have interacted with a component of basalt that has previously undergone low-temperature weathering. the fluids are 14% depleted in Cl relative to seawater. Supercritical phase separation appears to be the only reasonable process that may account for the fluid depletion.

This record has no associated files available for download.

More information

Published date: 1995
Organisations: Geochemistry, Marine Geoscience

Identifiers

Local EPrints ID: 210299
URI: http://eprints.soton.ac.uk/id/eprint/210299
ISSN: 0016-7037
PURE UUID: 7c8ab609-e743-4abb-b5ea-a235c5775497
ORCID for R.H. James: ORCID iD orcid.org/0000-0001-7402-2315

Catalogue record

Date deposited: 07 Feb 2012 13:55
Last modified: 15 Mar 2024 03:30

Export record

Altmetrics

Contributors

Author: R.H. James ORCID iD
Author: H. Elderfield
Author: M.R. Palmer

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.

×