Salman Bloch, James L. Bischoff; The effect of low-temperature alteration of basalt on the oceanic budget of potassium. Geology ; 7 (4): 193–196. doi: https://doi.org/10.1130/0091-7613(1979)7<193:TEOLAO>2.0.CO;2
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Alteration of the oceanic crust along fractures is a major sink for the K supplied to the ocean. However, this process alone does not seem adequate to maintain the steady-state of the ocean with respect to K. Formation of authigenic K-bearing minerals may also be a major factor in its removal from sea water. Ion exchange and palagonitization appear to play relatively minor roles in the oceanic budget of K.