CADMIUM AND ZINC IN NAMIBIAN SHELF PHOSPHORITES

Abstract

We studied recent phosphorite nodules and micronodules of different grades of lithification, phosphatized coprolites of sea lions, and enclosing diatom oozes. Pliocene–Pleistocene phosphate samples include phosphorite nodules, phosphatized coprolites and shell casts, as well as phosphate-rich and phosphate-poor sands.