28
-10
0
Elseaz
20
:
40
"
60
"
80
0 20 40 60 80 100-12
-8
-4
,--. -I0
.IG
~
;
"'"~
E 20
" - .
,
20
r *
c~
= 4 0
:
40 ,~.
~ 60
" ,
6O . . +.
m m
80
80
0 20 40 60 80 100 -12
-8
b. Enz
ol
20
4O
6O
80
0
Ima 9
100
200
Mn 2+ (pM)
0
4
0
()
1
-4
0
4
0
r Schwarzbach
-IG
si
20
@
<~
40
~
( )
60
~
80
-
-12
-8
-4
0
4
Saturation Index (SI)
9 alabandite o rhcKtochrosite
300
600
900
300
6OO
9OO
Mn (mg/kg)
Fig. 4.'/. Dissolved Mn 2+, SI of Mn minerals, and Mn in the sediments of the tributaries