Changes in the Composition of Upper Pleistocene Sediments in the Center of an Active Hydrothermal System (Middle Valley, Juan De Fuca Ridge, Pacific Ocean)

The article presents the results of studying changes in the chemical composition of Upper Pleistocene sediments from Hole ODP 1036A drilled in the Middle Valley of the Juan de Fuca oceanic ridge at the Dead Dog hydrothermal field to a depth of 38.50 m, 9 m from a black smoker with a temperature of 2...

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Bibliographic Details
Published in:Oceanology (Washington. 1965) 2024, Vol.64 (4), p.584-597
Main Authors: Kurnosov, V. B., Konovalov, Yu. I., Galin, K. R.
Format: Article
Language:English
Subjects:
Chemical composition
Chemical elements
Earth and Environmental Science
Earth Sciences
Elements
Hydrothermal fields
Hydrothermal systems
Marine Geology
Oceanography
Pleistocene
Sediment
Sediment chemistry
Sediments
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Summary:The article presents the results of studying changes in the chemical composition of Upper Pleistocene sediments from Hole ODP 1036A drilled in the Middle Valley of the Juan de Fuca oceanic ridge at the Dead Dog hydrothermal field to a depth of 38.50 m, 9 m from a black smoker with a temperature of 268°C. The most significant changes in sediment chemistry occurred in the lower intervals of the hole. In the 20–30.70 m interval, the concentration of a large number of chemical elements increased and, accordingly, the hydrothermal fluid was depleted of these elements. Conversely, in the 30.70–38.5 m interval, the concentration of most chemical elements decreased, which led to significant enrichment of hydrothermal fluid in these elements.
ISSN:0001-4370
1531-8508
DOI:10.1134/S0001437024700255