gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1998.62A.1.271 Surface Concentrations of ²²⁸Th,²³⁰Th and ²³¹Pa in the Atlantic Sector of the Southern Ocean — the Effects on Palaeoenvironmental Applications Geibert W. Walter H.-J. Hanfland C. Rutgers van der Loeff M. M. Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany 1998 62A 1 511 512 Copyright © 1998, The Mineralogical Society 1998