Weathered heavy-mineral associations from the young-Tertiary deposits of Jutland,Denmark

Exemplified by young Tertiary sandy sediments from Denmark, general aspects of the study of heavy-minerals are discussed. It is demonstrated that three different heavy-mineral associations of the sediments have originated from one single association by successive chemical weathering of amphibole and epidote. Physical processes active during deposition may influence the composition within associations, but differences of this origin are shown to be insufficient to explain the differences between the associations. It has not been possible to demonstrate major influence on the heavy-mineral associations from differences in the composition within the source area, which is assumed to be part of the Scandinavian Shield.