PUMA
Istituto di Scienze Marine     
Varnavas S., Panagiotaras D., Megalovasilis P., Dando P., Aliani S., Meloni R. Compositional characterization of suspended particulate matter in hellenic volcanic arc hydrothermal centres. In: Physics and Chemistry of the Earth Part B-Hydrology Oceans and Atmosphere, vol. 25 (1) pp. 9 - 18. Elsevier Science Ltd, 2000.
 
 
Abstract
(English)
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: http://www.sciencedirect.com/science/article/pii/S1464190999001136
DOI: 10.1016/S1464-1909(99)00113-6
Subject hydrothermal centres
Hellenic Volcanic Arc
suspended particulate matter
SPM
Palaeochori bay
Milos island
SPM chemical characteristics


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