The addition of salts derived from the mantle and weathering rocks are unable to balance the amount of minerals being bound in the sediments.

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Quizplus · Accepted Answer

The addition of salts from the weathering of rocks and the mantle are not enough to balance those being bound in the sediment. Dissolved salts can precipitate out of the water from the shells of living organisms that are full of minerals and are drifting to the seafloor. Information can be found in the section Seawater Consists of Water and Dissolved Solids.

The Addition of Salts Derived from the Mantle and Weathering