Abstract
The sediment from an intertidal area has been investigated with regard to the vertical and areal distribution of the following acid-soluble metals: Na, K, Mg, Ca, Fe, Co, Ni, Cu, Ag and Pb. In addition to the metals, granulometric properties, content of organic matter, carbonate concentrations and E h are measured. The metals are accumulated along the margins of the area and show a high correlation with organic matter and the finest sediment fraction. The interstitial water is diluted with infiltrated rain water. The higher level of this water, of the marsh area compared with that of the tidal flat area, gives rise to an upward percolation in the sediment of the tidal flat area. The metal interrelationships and concentrations are determined by processes in the uppermost oxidized layer and only to a minor extent by reducing processes in the lower hydrogen sulphide-rich layers.
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