New hydrothermal sulfide fields of the Mid-Atlantic Ridge: Yubileinoe (20 degrees 09 ' N) and Surprise (20 degrees 45.4 ' N)

摘要

Two new sulfide fields (Yubileinoe, 20 degrees 09' N, and Surprise, 20 degrees 45.4' N) were discovered between 20 degrees 01' and 20 degrees 54' N within the Russian Application Area of the Mid-Atlantic Ridge (MAR). The Yubileinoe field is located at a depth of 2300-2550 m in the near-top area of the first rift ridge, which is a boundary of the western wall of the rift valley. This new field and the Zenith-Victory field, which was previously discovered in the eastern wall, occur symmetrically relative to the rift valley of this MAR segment. The Surprise field at a depth of 2800-2850 m is situated in the eastern wall of the rift valley, on the slope of the volcanic uplift. After the discovery of these inactive sulfide fields, the number of hydrothermal fields within the Russian Application Area reached ten.