The ikaite to calcite transformation: implications for palaeoclimate studies by Vickers, ML, Vickers, M, Rickaby, REM, Wu, H, Bernasconi, SM, Ullmann, CV, Bohrmann, G, Spielhagen, RF, Kassens, H, Pagh Schultz, B, Alwmark, C, Thibault, N, Korte, C