Which deep-sea hydrothermal vent field on the Mid-Atlantic Ridge is known for white smokers?

The deep-sea hydrothermal vent field on the Mid-Atlantic Ridge known for white smokers is the Lost City hydrothermal field.

Lost City lies on the Atlantis Massif, near the intersection of the Mid-Atlantic Ridge and the Atlantis Transform Fault. It was discovered in 2000 and differs from many famous black-smoker systems because its chemistry is driven largely by serpentinization: seawater reacts with mantle rock, producing alkaline fluids rich in hydrogen and methane.

Its pale chimneys and carbonate mounds create the white-smoker appearance. Fluids are generally much cooler than those at volcanic black smokers, commonly around 40–90°C, and contain little hydrogen sulfide, carbon dioxide, or metal-rich material. That is why Lost City does not produce the dense, dark plumes associated with classic black smokers.

The name can cause confusion because Lost City is not a city and is not primarily a volcanic vent system. Its long-lived chemistry has made it important in research on unusual microbial ecosystems and possible chemical pathways involved in the origin of life.