ANNEXE 30
Analyses chimiques (ICP) des quatre sédiments (C2, C3, PI et P2)
Prélèvements
Elément
C2
C3
PI
P2
SiO2 (%)
48.00
42.70
17.7
25.0
MgO (%)
<1
<1
5.0
2.5
MO, (%)
8.50
12.70
6.2
8.1
IÇO (%)
1.70
1.40
1.10
1.30
Fe2O3 (%)
3.70
5.90
4.0
3.6
MnO (%)
0.04
0.04
0.02
0.06
CaO (%)
11.50
5.20
34.0
32.6
TiO, (%)
0.58
0.47
0.25
0.38
P2O5 (ppm)
7 328
19 190
2 235
5 242
V (ppm)
54
65
82
81
Cu (ppm)
201
364
310
1 092
Y (ppm)
<20
<20
<20
<20
Cd (ppm)
25
12
4
10
La (ppm)
<20
<20
<20
<20
Bi (ppm)
<10
<10
<10
<10
Nb (ppm)
<20
<20
<20
368
Cr (ppm)
301
305
105
178
Zn (ppm)
1 350
1 431
737
818
Sn (ppm)
52
52
55
57
Ce (ppm)
58
54
<10
<10
Zr (ppm)
261
239
74
342
Be (ppm)
<2
<2
<2
<2
Co (ppm)
12
31
51
8
As (ppm)
61
72
1 887
46
Mo (ppm)
16
11
<5
8
Sb (ppm)
13
<10
58
<10
W (ppm)
<10
<10
<10
<10
B (ppm)
42
39
153
101
Ni (ppm)
75
246
69
35
Sr (ppm)
304
353
266
257
Ag (ppm)
52
67
2.0
4.0
Ba (ppm)
569
962
1 588
476
Pb (ppm)
164
516
860
440
Hg (ppm)
/
/
/
16.35
298