Compositional characterization of suspended particulate matter in hellenic volcanic arc hydrothermal centres
Identifieur interne : 000189 ( Istex/Curation ); précédent : 000188; suivant : 000190Compositional characterization of suspended particulate matter in hellenic volcanic arc hydrothermal centres
Auteurs : S. P Varnavas [Grèce] ; D. Panagiotaras [Grèce] ; P. Megalovasilis [Grèce] ; P. Dando [Royaume-Uni] ; S. Alliani [Italie] ; R. Meloni [Italie]Source :
- Physics and Chemistry of the Earth, Part B [ 1464-1909 ] ; 2000.
Descripteurs français
- Wicri :
- topic : Milieu marin.
English descriptors
- KwdEn :
- Aluminosilicate value, Central part, Centre, Compositional variability, Cronan, Data variance, Diurnal variability, Element factor, Elsevier science, Factor analysis, Factor matrix, Flow rate, Graphite furnace, Higher values, Highest concentrations, Highest values, Hydrothermal, Hydrothermal centre, Hydrothermal centres, Hydrothermal field, Hydrothermal fluids, Hydrothermal waters, June, Latitude longitude, Lowest values, Marine environment, Other sampling times, Palaeochori, Palaeochori hydrothermal vents, Particulate, Particulate matter, Positive loadings, Receiver flask, Same phase, Sampling periods, Sampling times, Santorini hydrothermal field, Second factor, September, Spatial variability, Strong biogenic affiliation, Submarine hydrothermal fields, Surface waters, Temperature variability, Third factor accounts, Total data variance, Trace elements, Values decrease, Vamavas, Variability, Varnavas, Water column, Water flow, Western parts.
- Teeft :
- Aluminosilicate value, Central part, Centre, Compositional variability, Cronan, Data variance, Diurnal variability, Element factor, Elsevier science, Factor analysis, Factor matrix, Flow rate, Graphite furnace, Higher values, Highest concentrations, Highest values, Hydrothermal, Hydrothermal centre, Hydrothermal centres, Hydrothermal field, Hydrothermal fluids, Hydrothermal waters, June, Latitude longitude, Lowest values, Marine environment, Other sampling times, Palaeochori, Palaeochori hydrothermal vents, Particulate, Particulate matter, Positive loadings, Receiver flask, Same phase, Sampling periods, Sampling times, Santorini hydrothermal field, Second factor, September, Spatial variability, Strong biogenic affiliation, Submarine hydrothermal fields, Surface waters, Temperature variability, Third factor accounts, Total data variance, Trace elements, Values decrease, Vamavas, Variability, Varnavas, Water column, Water flow, Western parts.
Abstract
Abstract: Suspended particulate matter (SPM) separated from waters discharging from a number of submarine hydrothermal vents at Palaeochori bay, Milos island was analysed for major and trace elements (i.e. Fe, Mn, Cu, Pb, Cd, Ca, Sr, Si, Al, B a). It was found that SPM in the hydrothermal waters investigated was strongly enriched in Fe, Mn, Si and Ba compared with normal Aegean Sea waters. Four major hydrothermal centres were distinguished on the basis of the SPM chemical characteristics. On average Fe decreases in the four hydrothermal centres in the following order : A > D > C > B while Si decreases as follows: D > A > C > B. Calcium, Sr, Si and Ba show a strong biogenic affiliation. The marked enrichment of these elements in hydrothermal centre D relative to the other hydrothermal centres indicates strong biological activity there. The diurnal variability of Ca, Sr, Si and Ba shows increase in the afternoon. On average the concentrations of Fe, Si and Ca were higher in September 1996 than in June 1996. By contrast Mn, Cu, Pb and Sr were more enriched in June than in September 96.
Url:
DOI: 10.1016/S1464-1909(99)00113-6
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<term>Elsevier science</term>
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<term>Highest values</term>
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<term>Cronan</term>
<term>Data variance</term>
<term>Diurnal variability</term>
<term>Element factor</term>
<term>Elsevier science</term>
<term>Factor analysis</term>
<term>Factor matrix</term>
<term>Flow rate</term>
<term>Graphite furnace</term>
<term>Higher values</term>
<term>Highest concentrations</term>
<term>Highest values</term>
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<term>Hydrothermal centre</term>
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<term>Hydrothermal field</term>
<term>Hydrothermal fluids</term>
<term>Hydrothermal waters</term>
<term>June</term>
<term>Latitude longitude</term>
<term>Lowest values</term>
<term>Marine environment</term>
<term>Other sampling times</term>
<term>Palaeochori</term>
<term>Palaeochori hydrothermal vents</term>
<term>Particulate</term>
<term>Particulate matter</term>
<term>Positive loadings</term>
<term>Receiver flask</term>
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<term>Sampling periods</term>
<term>Sampling times</term>
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<term>Second factor</term>
<term>September</term>
<term>Spatial variability</term>
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<term>Submarine hydrothermal fields</term>
<term>Surface waters</term>
<term>Temperature variability</term>
<term>Third factor accounts</term>
<term>Total data variance</term>
<term>Trace elements</term>
<term>Values decrease</term>
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<term>Variability</term>
<term>Varnavas</term>
<term>Water column</term>
<term>Water flow</term>
<term>Western parts</term>
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<front><div type="abstract" xml:lang="en">Abstract: Suspended particulate matter (SPM) separated from waters discharging from a number of submarine hydrothermal vents at Palaeochori bay, Milos island was analysed for major and trace elements (i.e. Fe, Mn, Cu, Pb, Cd, Ca, Sr, Si, Al, B a). It was found that SPM in the hydrothermal waters investigated was strongly enriched in Fe, Mn, Si and Ba compared with normal Aegean Sea waters. Four major hydrothermal centres were distinguished on the basis of the SPM chemical characteristics. On average Fe decreases in the four hydrothermal centres in the following order : A > D > C > B while Si decreases as follows: D > A > C > B. Calcium, Sr, Si and Ba show a strong biogenic affiliation. The marked enrichment of these elements in hydrothermal centre D relative to the other hydrothermal centres indicates strong biological activity there. The diurnal variability of Ca, Sr, Si and Ba shows increase in the afternoon. On average the concentrations of Fe, Si and Ca were higher in September 1996 than in June 1996. By contrast Mn, Cu, Pb and Sr were more enriched in June than in September 96.</div>
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