98
3
Quantification of Early Diagenesis: Dissolved Constituents in Marine Pore Water
Fig. 3.17 Comparison of analyses after the preparation of pore water by compression and centrifugal extraction. In principle,
there are no observable differences. The larger variation of the sulfide values might be attributed to the decompression of the core
and/or might have occurred upon mounting the sediment into the press or into the centrifuge (after Schulz et al. 1994).
10
70
60
50
40
30
20
0
10
20 30 40 50 60
70
0
alkalinity [mmol(eq)/l]
- C
alkalinity [mmol(eq)/l] - P
5
4
3
2
1
0 0
1
2
3
4
5
sulfide [mmol/l] - P
sulfide [mmol/l]
- C
5
10 15
20 25 30
35
0
sulfate [mmol/l] - P
0
5
10
15
20
25
30
35
1
2
3
4
5
0
0.1
0.2 0.3
0.4
0.5
0.6
0
1
2
3
4
5
0
0.1
0.2
0.3
0.4
0.5
0.6
0
ammonium [mmol/l] - P
phosphate [mmol/l] - P
ammonium [mmol/l]
- C
phosphate [mmol/l]
- C
sulfate [mmol/l]
- C
n = 53
r 2 = 0.99
n = 45
r 2 = 0.99
n = 46
r 2 = 0.99
n = 50
r 2 = 0.84
n = 44
r 2 = 0.98