994 resultados para Pick-Sloan Missouri Basin Program (U.S.). Glendo Unit.
Resumo:
80/09
Resumo:
82/20
Resumo:
77/16.3
Resumo:
78/80
Resumo:
85(7.2)
Resumo:
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 elements.
