Application of X-Ray Transmission Sensor-Based Sorting for Preconcentration of Seafloor Massive Sulphide Rock Samples from the Loki’s Castle Area at the Arctic Mid-Ocean Ridge - Hahn, Klaus Matthias; Lennartz, Jutta; Wotruba, Hermann; Kowalczuk, Przemyslaw B.; Snook, Ben; Aasly, Kurt; Kleiv, Rolf Arne ("Ore and Metals" Publishing house, 2018)