Hydrothermal metallogenic processes off the islands of Nisiros and Kos in the Hellenic Volcanic Arc
Identifieur interne : 000437 ( Main/Merge ); précédent : 000436; suivant : 000438Hydrothermal metallogenic processes off the islands of Nisiros and Kos in the Hellenic Volcanic Arc
Auteurs : S. P. Varnavas ; D. S. CronanSource :
- Marine geology [ 0025-3227 ] ; 1991.
Descripteurs français
- Pascal (Inist)
- Condition hydrothermale, Source sous marine, Arc insulaire, Hydrochimie, Sulfure, Analyse chimique, Mer Egée, Grèce, Sédiment marin, Ile Kos, Ile Yali, Ile Nisiros, Métallogénie, Cheminée hydrothermale, Arc volcanique, Analyse majeurs, Analyse mineurs, Fer substance, Manganèse substance, Iles Dodécanèse, Zinc substance.
- Wicri :
- geographic : Grèce.
English descriptors
- KwdEn :
- Aegean Sea, Chemical analysis, Chemical composition, Dodecanese, Greece, Hydrochemistry, Hydrothermal chimneys, Hydrothermal condition, Hydrothermal conditions, Iron ores, Island arc, Major elements, Manganese ores, Marine sediments, Metallogeny, Minor elements, Submarine springs, Sulfides, Volcanic arcs, Zinc ores.
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
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Pascal:91-0594101Le document en format XML
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