Table T15. Concentrations of chemical species in a gas hydrate nodule and in interstitial water remaining after the dissociation of gas hydrate containing sediment, Holes 1230A and 1230B.

Table T15. Concentrations of chemical species in a gas hydrate nodule and in interstitial water remaining after the dissociation of gas hydrate containing sediment, Holes 1230A and 1230B.


Core, section: Matrix:	1230B-12H-2 Hydrate nodule	1230A-11H-3 Ambient interstitial water	1230A-19H-1 20% hydrate
Dissolved species:
Cl (mM)	33	541.2	388.2
Ba (µM)	7.6	356.1	318.7
Fe (µM)	3.3	16.0	22.3
Li (µM)	3.3	106	135
Mn (µM)	0.2	0.7	0.3
Sr (µM)	3.8	115	90.4
Acetate (µM)	4.3	35.2	161.7
Formate (µM)	4.8	4.1	5.9

Note: These data are compared to concentrations of the same species in interstitial water at the same sediment depth in a parallel hole.