|
molar:
9.3 10-3 = e.g. 9.3 µM/mM or 9.3 mM/M
weight:
15 10-6 = e.g. 15 ng/mg or 15 µg/g..
|
|
Seawater
|
Coral
|
foram a
|
|
Seawater
|
Coral
|
foram
|
|
coral
|
foram
|
|
ratio
|
molar
|
molar
|
molar
|
|
weight
|
weight
|
weight
|
|
factor
|
factor
|
|
Mg/Ca
|
5.2
|
5
10-3
|
1-10
10-3
|
|
3.1
|
3
10-3
|
0.6-6
10-3
|
|
1
10-3
|
2
- 20 10-4
|
|
Sr/Ca
|
8-9
10-3
|
9.3
10-3
|
1-2
10-3
|
|
18-20
10-3
|
20
10-3
|
2.2-4.4
10-3
|
|
1
|
0.1
- 0.2
|
|
Ba/Ca
|
3-15
10-6
|
4-10
10-6
|
2-3
10-6
|
|
10-50
10-6
|
14-35
10-6
|
5-10
10-6
|
|
1
|
1
|
|
U/Ca
|
1-1.6
10-6
|
1-2
10-6
|
5-15
10-9
|
|
6-10
10-6
|
6-12
10-6
|
3-9
10-8
|
|
1
|
1
10-2 |
|
B/Ca
|
40
10-3
|
4-5
10-4
|
|
|
11
10-3
|
0.1-0.13
10-3
|
|
|
10-2
|
|
|
Mn/Ca
|
1.8-3
10-8
|
|
1-20
10-5
|
|
24-40
10-9
|
|
1.4-28
10-5
|
|
|
103
- 104 |
|
Cd/Ca
|
10-10-10-7
|
|
5-25
10-8
|
|
0.3-300
10-9
|
|
1.4-7
10-7
|
|
|
1
- 103 |
|
Li/Cab
|
2.4
10-3
|
4-18
10-6
|
2-6
10-6
|
|
4.2
10-4
|
0.7-3
10-6
|
0.3-1
10-6
|
|
10-3
|
10-3
|
|
Li/Mgb
|
4.7
10-4
|
2-5
10-3
|
0.5-1.5
10-3
|
|
1.4
10-4
|
0.6-1.5
10-3
|
0.15-0.5
10-3
|
|
10
|
1
- 3 |
a
data
from Harding,
D. J., J. W. Arden, and R. E. M. Rickaby (2006), A
method for precise analysis of trace element/calcium
ratios in carbonate samples using quadrupole inductively
coupled plasma mass spectrometry, Geochem. Geophys.
Geosyst., 7, Q06003, doi:10.1029/2005GC001093.
b
data
from Marchitto,
T.M., Bryan, S.P., Doss, W., McCulloch, and P.
Montagna (2018) A simple biomineralization model
to explain Li, Mg, and Sr incorporation into aragonitic
foraminifera and corals, EPSL 481, 20-29.
https://doi.org/10.1016/j.epsl.2017.10.022.
|
