305
The Carbonate System
Calcite in Sediments (%)
0
20
40
60
80
100
Bottom Depth (m)
3500
4000
4500
Western Atlantic
Rio Grande Rise
(30°S)
∆CO 3
2–
=
10 µM
∆CO 3
2– =
10 µM
∆CO 3
2– =
10 µM
∆CO 3
2–
=
10 µM
0
20
40
60
80
100
2500
3000
3500
4000
4500
5000
Western Pacific
Java Plateau
(10°N–10°S)
0
20
40
60
80
100
Bottom Depth (m)
3500
4000
4500
Eastern Pacific
East Pacific Rise
(17°S)
0
20
40
60
80
100
3000
3500
4000
4500
5000
5500
Indian Ocean
(20–30°S)
Figure 7.44
Calcium carbonate concentrations in the sediments of various oceans.
Time (days)
0
20
40
60
80
100
K
sp × 10 7
(mol 2
kg –2
)
7
8
9
Figure 7.45
Values of the solubility product for aragonite in waters as a function of the equilibration times.