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.
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
1995
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), .
(doi:10.1016/0016-7037(95)00003-I).
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
Catalogue record
Date deposited: 07 Feb 2012 13:55
Last modified: 15 Mar 2024 03:30
Export record
Altmetrics
Contributors
Author:
H. Elderfield
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
