Uranium in marine basalts, supplement to: MacDougall, J Douglas (1977): Uranium in marine basalts: Concentration, distribution and implications. Earth and Planetary Science Letters, 35(1), 65-70

J Douglas MacDougall
The uranium content of glass from chilled margins of oceanic tholeiitic basalt flows is generally <0.1 ppm, even for old samples with highly altered crystalline interiors. Such low values represent the original whole rock concentrations, although subsequent to eruption low-temperature weathering has added uranium, and other elements, to the crystalline portions of these basalts. Consideration of the K/U ratios of altered samples suggests that basalt weathering may provide the major oceanic sink for these two...
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