Hydrothermal metallogenic processes off the islands of Nisiros and Kos in the Hellenic Volcanic Arc
Identifieur interne : 000003 ( Istex/Corpus ); précédent : 000002; suivant : 000004Hydrothermal 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.
English descriptors
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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
Links to Exploration step
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<front><div type="abstract" xml:lang="en">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.</div>
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<head><ce:dochead><ce:textfn>Research paper</ce:textfn>
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<ce:title>Hydrothermal metallogenic processes off the islands of Nisiros and Kos in the Hellenic Volcanic Arc</ce:title>
<ce:author-group><ce:author><ce:given-name>S.P</ce:given-name>
<ce:surname>Varnavas</ce:surname>
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<ce:author><ce:given-name>D.S</ce:given-name>
<ce:surname>Cronan</ce:surname>
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<ce:affiliation id="AFF1"><ce:label>a</ce:label>
<ce:textfn>Department of Geology, University of Patras, Patras, Greece</ce:textfn>
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<ce:affiliation id="AFF2"><ce:label>b</ce:label>
<ce:textfn>Department of Geology, Imperial College, London SW7 2BP, UK</ce:textfn>
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<ce:abstract><ce:section-title>Abstract</ce:section-title>
<ce:abstract-sec><ce:simple-para>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.</ce:simple-para>
<ce:simple-para>The geochemical features described support possible sub-seafloor formation of metal sulphides at both of the hydrothermal fields studied.</ce:simple-para>
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<abstract lang="en">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.</abstract>
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