31
-10
0
20
40
I
60
813
0
0.2
0.4
-10
oi
20
,~
= 40
e-,
o~
~ 60
~ 8o
0.0
9
"..-.
0.2
0.4
-10
0
20
40
60
mean
80
h
t
i
0 0.2 0.4 0.6 0.8
F e 2+ (raM)
a. Elseaz
0.6 -6 -4 -2 0 2 4 6
0
b. Enz
ol
60
(~
80
, . ,
0.6 -6 -4 -2 0 2 4 6
0
-1(3
o
c. S c h w a r z b a c h
20
40
(~
60
80 . ,
-6 -4 -2 0 2 4 6
Saturation Index (SI)
siderite
4
Fe (%)
Fig. 4.9. Dissolved Fe 2+, SI of siderite, and Fe in the sediments of the tributaries