Secondary minerals geochemical controls

Predicted secondary minerals. As discussed above, direct evidence for the formation of secondary trace element phases in weathered ash is rare. Most evidence suggesting precipitation of trace element phases by weathering processes is therefore indirect. For example, geochemical modelling of pore fluids in CCB disposal facilities and ash leachate solutions indicates that aqueous trace element concentrations are controlled by a variety of secondary phases. Table 2 lists numerous secondary trace element phases predicted, but not yet observed, to form in weathering CCB systems. 

DaH Aglio, M., Gragnani, R. and Locardi, E., 1974. Geochemical factors controlling the formation of the secondary minerals of uranium. In Formation of Uranium Ore Deposits. International Atomic Energy Agency, Vienna, pp. 33—48. 

Dali. Agi.io, M, R. Gragnani, and E. Ixktardi. 1974. Geochemical factors controlling the formation of secondary minerals of uranium. Formation of uranium deposits. Froc. symp. Inti. Atomic Energy Agency, pp. 33-47, Vienna. 

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