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+1.0 <br /> 10'4 <br /> 'f + 8 I <br /> LtNolmurs •Ii O <br /> ® Rain Hater <br /> ®Shallow Groundwater QHL" Waters +6 2+ + y20 <br /> "zo_oz <br /> ® Connate Water@ UO2 <br /> \Gz'PE,R SOIL +.4 4+ O =N <br /> .a trNr7• .._PRAT DOG U I N <br /> 0- �N <br /> +.2 I 0 S <br /> .6 /NT ENSE ST AorttTt Eh <br /> 1 V O <br /> wEgr °+ (volts/ 0 UO2 Co <br /> hEhW glop <br /> wqr 2 Uraninite <br /> Eh 1 q E UGH3+ <br /> v°in TA Eht. <br /> SOILS \ hS�ri fq NON � 1 <br /> oh e�E NEhTS \ _ 4 � <br /> "zo O ° <br /> \ Eh <br /> 0 2 z' 2 L+ <br /> 4 NTS S°•ioe\ V <br /> P6A1' BOGS <br /> !q <br /> ! E1�Z% <br /> -.z "z-,fi N <br /> Nd�"r �z ply ° CV2 4 6 S 10 12 14 <br /> See <br /> ry �•e 2 • 6 a 10 12 i• pH <br /> pH <br /> Fig. 14. Aqueous equilibrium diagram of the <br /> Fig. 13. Geochemical environments in terms of Eh and pH. After Baas Becking U-02-H2O system at 250C and 1 atm. <br /> at al. (1960); weathering and depth environments after Sato (1960a). Boundaries of solid phases at total <br /> (Hansuld, 1967) activity of uranium-bearing ions = <br /> 10-6 (238 ppb) in unbroken lines, <br /> and at total activity - 10-4 (23.8 <br /> j in d��h�d lYnos. <br /> (Hoetatlor <br />