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The study on carbonate systems is a very important subject of early diagenesis in interstitial water chemistry. But in general, the behavior of iron and manganese in marine sediment interstitial water are the typical examples in oxidation-reduction systems, so iron and manganese in marine sediment interstitial waters are controlled by their oxidation-reduction systems.This paper lays emphasis on dolomitization of calcite, dissolution of CaCO3 and phosph-atization of calcite, as well as on the control systems of iron and manganese in interstitial waters of the East China Sea.Nine cores about 60cm depth were obtained by using box corer from three regions of the East China Sea (the outer region off Changjiang River Estuary TORCRE, the Okinawa Trough TOT, and Taiwan Strait North TSN) (Fig. 1). The pH values, Eh, dissolved phosphate, calcium, mangnesium, total alkalinity (ALK), sulfate, iron and manganese in interstitial water were determined. The results are as follows.
The study on carbonate systems is a very important subject of early diagenesis in interstitial water chemistry. But in general, the behavior of iron and manganese in marine sediment interstitial water are the typical examples in oxidation-reduction systems, so iron and manganese in marine sediment interstitial waters are controlled by their oxidation-reduction systems. This paper lays emphasis on dolomitization of calcite, dissolution of CaCO3 and phosph-atization of calcite, as well as on the control systems of iron and manganese in interstitial waters of the East China Sea. Nine cores about 60 cm depth were obtained by using box corer from three regions of the East China Sea (the outer region off Changjiang River Estuary TORCRE, the Okinawa Trough TOT, and Taiwan Strait North TSN) (Fig. 1). The pH values, Eh, dissolved phosphate, calcium, mangnesium, total alkalinity (ALK), sulfate, iron and manganese in interstitial water were determined. The results are as follows.