Hydrothermal metallogenic processes off the islands of Nisiros and Kos in the Hellenic Volcanic Arc
Identifieur interne : 000334 ( Istex/Checkpoint ); précédent : 000333; suivant : 000335Hydrothermal metallogenic processes off the islands of Nisiros and Kos in the Hellenic Volcanic Arc
Auteurs : S. P Varnavas [Grèce] ; D. S Cronan [Royaume-Uni]Source :
- Marine Geology [ 0025-3227 ] ; 1991.
Descripteurs français
English descriptors
- KwdEn :
- Acetic, Acetic acid, Acta, Aegean region, Aegean shelf sediments, Aegean world, Areal, Areal distribution, Areal variations, Average value, Bostr6m, Carbonate, Chemical composition, Concentration levels, Cosmochim, Cronan, Datum, Earth planet, Eastern mediterranean, Eastern part, Edmond, Embayment, Enrichment, Exhalative, Fine fraction, Fine fractions, Galapagos, Geochemical, Geochemical behaviour, Geochemistry, Geochim, Geol, Greater amounts, Guaymas basin, Heavy metals, Higher ratios, Highest concentrations, Hydrothermal, Hydrothermal alteration, Hydrothermal fields, Hydrothermal metalliferous sediments, Hydrothermal metallogenetic processess, Hydrothermal solutions, Hydrothermal vents, Hydrothermal waters, Hydroxylamine, Hydroxylamine fraction, Hydroxylamine fractions, Inner part, Kameni, Kephalos, Manganese, Metal sulphides, Metalliferous, Metalliferous sediments, Metallogenetic, Moorby, Negative correlation, Nisiros, Normal seawater, Outer part, Outer zone, Partition geochemistry, Peckett, Precipitation, Processess, Same point, Santorini, Santorini embayments, Santorini hydrothermal field, Santorini volcano, Seafloor, Seawater, Sediment, Sediment samples, Southern aegean, Submarine hydrothermal solutions, Sulphide, Thera, Trace elements, Varnavas, Vent area, Vent areas, Volcanic rocks, Water samples, Yali, Yali sediments.
- Teeft :
- Acetic, Acetic acid, Acta, Aegean region, Aegean shelf sediments, Aegean world, Areal, Areal distribution, Areal variations, Average value, Bostr6m, Carbonate, Chemical composition, Concentration levels, Cosmochim, Cronan, Datum, Earth planet, Eastern mediterranean, Eastern part, Edmond, Embayment, Enrichment, Exhalative, Fine fraction, Fine fractions, Galapagos, Geochemical, Geochemical behaviour, Geochemistry, Geochim, Geol, Greater amounts, Guaymas basin, Heavy metals, Higher ratios, Highest concentrations, Hydrothermal, Hydrothermal alteration, Hydrothermal fields, Hydrothermal metalliferous sediments, Hydrothermal metallogenetic processess, Hydrothermal solutions, Hydrothermal vents, Hydrothermal waters, Hydroxylamine, Hydroxylamine fraction, Hydroxylamine fractions, Inner part, Kameni, Kephalos, Manganese, Metal sulphides, Metalliferous, Metalliferous sediments, Metallogenetic, Moorby, Negative correlation, Nisiros, Normal seawater, Outer part, Outer zone, Partition geochemistry, Peckett, Precipitation, Processess, Same point, Santorini, Santorini embayments, Santorini hydrothermal field, Santorini volcano, Seafloor, Seawater, Sediment, Sediment samples, Southern aegean, Submarine hydrothermal solutions, Sulphide, Thera, Trace elements, Varnavas, Vent area, Vent areas, Volcanic rocks, Water samples, Yali, Yali sediments.
Abstract
Abstract: Two submarine hydrothermal fields off Nisiros and Kos islands in the eastern sector of the Hellenic Volcanic Arc have been investigated using analyses of submarine hydrothermal waters and sediments. Both the waters and the sediments were found to be enriched in Fe, Mn and Zn, together with As, Mo and V in the sediments only, resulting from seawater-rock interaction processes similar to those described from mid-ocean ridge systems. Differences found between the products of these processes in the two hydrothermal fields studied reflect differences between the rock types being leached, the physiographic and geological conditions present including the thickness and composition of the sediment column above the volcanic rocks, and the rates of mixing of hydrothermal solutions with normal seawater.The geochemical features described support possible sub-seafloor formation of metal sulphides at both of the hydrothermal fields studied.
Url:
DOI: 10.1016/0025-3227(91)90086-J
Affiliations:
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ISTEX:9512BE2BC2A020D2C7E67725499B591BB034EE5ALe document en format XML
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Volcanic Arc have been investigated using analyses of submarine hydrothermal waters and sediments. Both the waters and the sediments were found to be enriched in Fe, Mn and Zn, together with As, Mo and V in the sediments only, resulting from seawater-rock interaction processes similar to those described from mid-ocean ridge systems. Differences found between the products of these processes in the two hydrothermal fields studied reflect differences between the rock types being leached, the physiographic and geological conditions present including the thickness and composition of the sediment column above the volcanic rocks, and the rates of mixing of hydrothermal solutions with normal seawater.The geochemical features described support possible sub-seafloor formation of metal sulphides at both of the hydrothermal fields studied.</div></front></TEI><affiliations><list><country><li>Grèce</li><li>Royaume-Uni</li></country></list><tree><country name="Grèce"><noRegion><name sortKey="Varnavas, S P" sort="Varnavas, S P" uniqKey="Varnavas S" first="S. P" last="Varnavas">S. P Varnavas</name></noRegion></country><country name="Royaume-Uni"><noRegion><name sortKey="Cronan, D S" sort="Cronan, D S" uniqKey="Cronan D" first="D. S" last="Cronan">D. S Cronan</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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