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Models of hydrothermal plumes by submarine diffuse venting in a coastal area: a case study for Milos, South Aegean Volcanic Arc, Greece

Koelbl, Richard

Abstract:
The hydrothermal activity of Milos Island has been studied with respect to its economic potential and its significance for marine ecosystems. This study aims at assessing the hydrothermal plumes close to the southeastern coast of Milos forming from submarine diffuse vents covered by sediment in shallow water. It contributes to the knowledge about hydrothermal plumes at such conditions as a large part of research effort so far has been applied to hydrothermal plumes from focused vents in sediment- starved settings in the deep sea. Fluid and gas samples from submarine vents were taken showing different portions of high- and low salinity fluids originating in the hydro-thermal system. This seems to be controlled by the distance to the hydrothermal system and by the thickness of the sedimentary canope. Seawater samples were taken in the regions of active venting revealing a strong impact by low-salinity fluids on the seawater forming extended surface layers of lower salinity. High salinity fluids were encountered only as locally confined small plumes delineated by enrichments of main components. this suggests that the flux of low-salini ... mehr


Zugehörige Institution(en) am KIT Institut für Mineralogie und Geochemie (IMG)
Publikationstyp Hochschulschrift
Jahr 2000
Sprache Englisch
Identifikator ISSN: 0943-8599
KITopen ID: 29832000
Verlag Karlsruhe
Serie Karlsruher Geochemische Hefte ; 16
Abschlussart Dissertation
Fakultät Fakultät für Bio- und Geowissenschaften (Fak. f. Bio- u. Geowiss.)
Institut Institut für Petrographie und Geochemie (Inst. f. Petrograph. u. Geochem.)
Prüfungsdaten 07.06.2000
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