Serveur d'exploration Nissiros

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Gas venting rates from submarine hydrothermal areas around the island of Milos, Hellenic Volcanic Arc

Identifieur interne : 000335 ( Main/Exploration ); précédent : 000334; suivant : 000336

Gas venting rates from submarine hydrothermal areas around the island of Milos, Hellenic Volcanic Arc

Auteurs : P. R. Dando ; J. A. Hughes ; Y. Leahy ; S. J. Niven ; L. J. Taylor ; C. Smith

Source :

RBID : ISTEX:0B709BF188229180372954BD85BF7BE56DDDCC15

English descriptors

Abstract

Abstract: Gas seeps were located, by echo sounding, SCUBA divers and ROV observations, at hydrothermal sites around the island of Milos, in the Hellenic Volcanic Arc. Samples were collected by SCUBA divers and by a ROV from water depths between 3 and 110 m. Fifty-six flow rates from 39 individual seeps were measured and these ranged from 0.2 to 18.51 h−1 at the depth of collection. The major component, 54.9–91.9% of the gas, was carbon dioxide. Hydrogen (≤3%), methane (≤9.7%) and hydrogen sulphide (≤8.1%) were also measured. Hydrothermal free gas fluxes from the submarine hydrothermal areas around Milos were estimated to be greater than 1010 moles y−1. It was concluded that submarine gas seeps along volcanic island arcs may be an important carbon dioxide source.

Url:
DOI: 10.1016/0278-4343(95)80002-U


Affiliations:


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Le document en format XML

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<term>Clear trend</term>
<term>Continental shelf research</term>
<term>Cosmochimica acta</term>
<term>Cymodocea nodosa</term>
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<term>Diver</term>
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<term>Flow rates</term>
<term>Freshwater research</term>
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<term>Helium isotopes</term>
<term>Hydrogen content</term>
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<term>Hydrogen sulphide concentrations</term>
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<term>Kraternaya bight</term>
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<term>Large areas</term>
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<term>Methane</term>
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<term>Sediment</term>
<term>Sediment column</term>
<term>Sediment temperature</term>
<term>Sediment temperature profiles</term>
<term>Seeps</term>
<term>Southern japan</term>
<term>Spathi</term>
<term>Spathi point</term>
<term>Submarine hydrothermal areas</term>
<term>Submarine hydrothermal areas table</term>
<term>Submarine venting</term>
<term>Sulphide</term>
<term>Temperature measurements</term>
<term>Transect</term>
<term>Transect line</term>
<term>Vent</term>
<term>Vent density</term>
<term>Vent outlet</term>
<term>Vent outlets</term>
<term>Vent temperature</term>
<term>Venting</term>
<term>Venting rates</term>
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<term>Biologiya morya</term>
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<term>Carbon dioxide</term>
<term>Clear trend</term>
<term>Continental shelf research</term>
<term>Cosmochimica acta</term>
<term>Cymodocea nodosa</term>
<term>Dando</term>
<term>Diver</term>
<term>East coast</term>
<term>Esmeralda bank</term>
<term>Fault lines</term>
<term>Flow rate</term>
<term>Flow rates</term>
<term>Freshwater research</term>
<term>Fytikas</term>
<term>Geothermal</term>
<term>Geothermal areas</term>
<term>Helium isotopes</term>
<term>Hydrogen content</term>
<term>Hydrogen sulphide</term>
<term>Hydrogen sulphide concentrations</term>
<term>Hydrogen sulphide content</term>
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<term>Hydrothermal areas</term>
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<term>Norton sound</term>
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<term>Sediment column</term>
<term>Sediment temperature</term>
<term>Sediment temperature profiles</term>
<term>Seeps</term>
<term>Southern japan</term>
<term>Spathi</term>
<term>Spathi point</term>
<term>Submarine hydrothermal areas</term>
<term>Submarine hydrothermal areas table</term>
<term>Submarine venting</term>
<term>Sulphide</term>
<term>Temperature measurements</term>
<term>Transect</term>
<term>Transect line</term>
<term>Vent</term>
<term>Vent density</term>
<term>Vent outlet</term>
<term>Vent outlets</term>
<term>Vent temperature</term>
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<term>Venting rates</term>
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<div type="abstract" xml:lang="en">Abstract: Gas seeps were located, by echo sounding, SCUBA divers and ROV observations, at hydrothermal sites around the island of Milos, in the Hellenic Volcanic Arc. Samples were collected by SCUBA divers and by a ROV from water depths between 3 and 110 m. Fifty-six flow rates from 39 individual seeps were measured and these ranged from 0.2 to 18.51 h−1 at the depth of collection. The major component, 54.9–91.9% of the gas, was carbon dioxide. Hydrogen (≤3%), methane (≤9.7%) and hydrogen sulphide (≤8.1%) were also measured. Hydrothermal free gas fluxes from the submarine hydrothermal areas around Milos were estimated to be greater than 1010 moles y−1. It was concluded that submarine gas seeps along volcanic island arcs may be an important carbon dioxide source.</div>
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<name sortKey="Dando, P R" sort="Dando, P R" uniqKey="Dando P" first="P. R." last="Dando">P. R. Dando</name>
<name sortKey="Hughes, J A" sort="Hughes, J A" uniqKey="Hughes J" first="J. A." last="Hughes">J. A. Hughes</name>
<name sortKey="Leahy, Y" sort="Leahy, Y" uniqKey="Leahy Y" first="Y." last="Leahy">Y. Leahy</name>
<name sortKey="Niven, S J" sort="Niven, S J" uniqKey="Niven S" first="S. J." last="Niven">S. J. Niven</name>
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