Abstract
Interstitial waters of marine carbonate sediments from two cores collected on the Bermuda Apron were analyzed for dissolved chloride, sodium, calcium, magnesium, and silica. Of all the constituents investigated only silica showed considerable deviation from the composition of average sea water. Metastable carbonate minerals (aragonite and high Mg calcite) are not present in the cores investigated and the Mg/Cl and Ca/Mg ratios of the interstitial waters indicate that these minerals have not been dissolved or recrystallized in the deep sea sedimentary environment. Aragonite and high Mg calcite are present in the carbonate sediments on the Bermuda Pedestal which serve as partial source materials for the deep sea carbonates. The results suggest that a considerable amount of selective dissolution and recrystallization of metastable carbonate minerals may occur during transport from shallow water to deep sea sites of deposition.
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