1. Hydrothermal mineralising processes and associated sedimentation in the Santorini hydrothermal embayments.
- Author
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Cronan D.S., Hodkinson R., Varnavas S.P., Cronan D.S., Hodkinson R., and Varnavas S.P.
- Abstract
A lithological and chemical study was made of sediment cores from shallow embayments with hydrothermal vents off Palaea Kameni (active from 50 AD) and Nea Kameni (active from 1900 AD), the central islands of the Greek caldera. Sediments from Palaea Kameni are reduced at depth and comprise mainly pyritiferous diatomaceous ooze, with minor Fe oxyhydroxide, volcanic debris, gypsum and siderite. Sediments from Nea Kameni are oxidised throughout and comprise amorphous Fe oxyhydroxides and goethite. Mn is much enriched towards the open sea. Substantial amounts of organic matter in the Palaea Kameni sediments account for the different geochemical processes. Metal accumulation in both embayments has been faster than at any dated location apart from the Atlantis II Deep., A lithological and chemical study was made of sediment cores from shallow embayments with hydrothermal vents off Palaea Kameni (active from 50 AD) and Nea Kameni (active from 1900 AD), the central islands of the Greek caldera. Sediments from Palaea Kameni are reduced at depth and comprise mainly pyritiferous diatomaceous ooze, with minor Fe oxyhydroxide, volcanic debris, gypsum and siderite. Sediments from Nea Kameni are oxidised throughout and comprise amorphous Fe oxyhydroxides and goethite. Mn is much enriched towards the open sea. Substantial amounts of organic matter in the Palaea Kameni sediments account for the different geochemical processes. Metal accumulation in both embayments has been faster than at any dated location apart from the Atlantis II Deep.