"Discovery of the first hydrothermal field along the 500-km-long Knipovich Ridge offshore Svalbard (the Jøtul field)" (2024) https://www.nature.com/articles/s4

"Discovery of the first hydrothermal field along the 500-km-long Knipovich Ridge offshore Svalbard (the Jøtul field)" (2024) https://www.nature.com/articles/s41598-024-60802-3 https://www.nature.com/articles/s41598-024-60802-3 : > "The newly discovered hydrothermal field, named Jøtul hydrothermal field, is associated with the eastern bounding fault of the rift valley rather than with an axial volcanic ridge. Guided by physico-chemical anomalies in the water column, ROV investigations on the seafloor showed a wide variety of fluid escape sites, inactive and active mounds with abundant hydrothermal precipitates, and chemosynthetic organisms. Fluids with temperatures between 8 and 316 °C as well as precipitates were sampled at four vent sites. High methane, carbon dioxide, and ammonium concentrations, as well as high [87/86] Sr isotope ratios of the vent fluids indicate strong interaction between magma and sediments from the Svalbard continental margin. Such interactions are important for carbon mobilization at the seafloor and the carbon cycle in the ocean Does that help confirm or reject thi?s: "Dehydration melting at the top of the lower mantle" (2014) https://www.science.org/doi/10.1126/science.1253358 https://www.science.org/doi/10.1126/science.1253358 : > They conclude that the mantle transition zone — 410 to 660 km below Earth's surface — acts as a large reservoir of water.