Uni Bremen Home MARUM - Sediment Geochemistry - Leobener Str - D-28359 Bremen - Germany
Marine Geochemistry - Laboratory Methods



on board methods

in lab methods

Element to Calcium ratios in
seawater, JCp-1 (porites coral standard) and JCt-1 (Tridacna Giant Clam standard)



 
 Seawater
JCp-1 a
JCp-1 b
JCt-1 c
JCt-1 b
 
JCp/SW
JCt/SW
ratio
molar
molar
molar
molar
molar

factor
factor
Mg/Ca
5.2
 4.19 10-3
 4.20 10-3
1.27 10-3
1.29 10-3

0.001
0.0002
Sr/Ca
8-9 10-3
8.66 10-3
8.84 10-3
1.69 10-3
1.68 10-3

1
0.2
Ba/Ca
3-15 10-6
7.86 10-6
7.47 10-6
4.66 10-6
 4.35 10-6

1
1
U/Ca
1-1.6 10-6
 
1.19 10-6

 22.7 10-9

1
0.02
B/Ca

40 10-3

463 10-6
460 10-6 
188 10-6
191 10-6

0.01 0.005
Mn/Ca
1.8-3 10-8
1.91 10-6

0.73 10-6
 

100 300
Cd/Ca
10-10-10-7
28 10-9 

2.05 10-9


1
1
Li/Ca
2.4 10-3
19.6 10-6 6.19 10-6
7.55 10-6 
4.08 10-6
0.005 0.002
Na/Ca
45.4
19.8 10-3
20.2 10-3 


0.0005 0.0005
Mo/Ca
2.4 10-3
81.9 10-9
16.4 10-9


3 10-5 6 10-6
Li/Mg
4.7 10-4
4.6 10-3 
1.47 10-3
5.94 10-3 
3.16 10-3

5 10

 

 

 







 





a  https://gbank.gsj.jp/geostandards/Certificate/PDF/eJCp1.pdf 
This certificate is done for concentrations not for ratios! The ratios are calculated only
for information purposes from the certified concentrations in this reference material sheet. The ratios in the paper by Hathorne et al (2013) should be used to create internationally comparable element to Ca ratios !!

b Hathorne, EC, Gagnon, A, Felis, T, Adkins, J, Asami, R, Boer, W, Caillon, N, Case, D, Cobb, KM, Douville, E, deMenocal, P, Eisenhauer, A, Garbe-Schönberg, D, Geibert, W, Goldstein, S, Hughen, K, Inoue, M, Kawahata, H, Kölling, M, Cornec, FL, Linsley, BK, McGregor, HV, Montagna, P, Nurhati, IS, Quinn, TM, Raddatz, J, Rebaubier, H, Robinson, L, Sadekov, A, Sherrell, R, Sinclair, D, Tudhope, AW, Wei, G, Wong, H, Wu, HC and You, CF (2013) Interlaboratory study for coral Sr/Ca and other element/Ca ratio measurements. Geochemistry, Geophysics, Geosystems, 14(9). 3730-3750. doi:10.1002/ggge.20230

c  https://gbank.gsj.jp/geostandards/Certificate/PDF/eJCt1.pdf
This certificate is done for concentrations not for ratios! The ratios are calculated only for information purposes from the certified concentrations in this reference material sheet . The ratios in the paper by Hathorne et al (2013) should be used to create internationally comparable element to Ca ratios !!

page created by M.Kölling & T.Feseker