Chemical composition of hydrothermal deposits and vulcanites from the Menez Gwen vent field, Mid-Atlantic Ridge

• Main Authors: Bogdanov, Yury A, Lein, Alla Yu, Sagalevich, Anatoly M
• Format: Dataset
• Language: English
• Published: PANGAEA 2005
• Subjects: Akademik Mstislav Keldysh; AMK49; AMK49-4574; Archive of Ocean Data; ARCOD; Menez Gwen vent field; Central North Atlantic; MIR; MIR deep-sea manned submersible; Mid-Atlantic Ridge; North Atlantic
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.763329; https://doi.org/10.1594/PANGAEA.763329

Surface hydrothermal deposits of the shallow-water Menez Gwen vent field located in the rift zone of the Mid-Atlantic Ridge are mostly composed of nonmetalliferous minerals in contrast to sulfide deposits of deep-water fields. Here sulfide minerals occur only in dispersed form. High-temperature sulfide deposits strongly enriched in copper and zinc occur only immediately below the surface of the bottom. This is related to subsurface boiling and phase separation of initial high-temperature hydrothermal ore-bearing solution that ascends from the interior to the floor surface.