Hydrogenetic, Diagenetic and Hydrothermal Processes Forming Ferromanganese Crusts in the Canary Island Seamounts and Their Influence in the Metal Recovery Rate with Hydrometallurgical Methods - Marino, Egidio; Gonzaléz, Francisco; Kuhn, Thomas; Madureira, Pedro; Wegorzewski, Anna; Mirão, José; Medialdea, Teresa; Oeser, Martin; Miguel, Catarina; Reyes, Jesús; Somoza, Luis; Lunar, Rosario (2019)