Table 3. Hydrothermal solution chemistry of selected Atlantic 

 and Pacific sites. 



Mid-Atlantic Ridge 2 

 (26°N and 23°N) 



Seawater 



Alkalinity (m eq/kg! 



1848-2136 

 483-506 



-0.5 to -0.2 



18 



558-559 







6 



3.7-4.0 



-0.2 to -0.1 



0.007 



< 0.001 



< 0.001 

 0.01 



10 



26 



464 



1.3 



10 

 53 

 87 



0.16 

 541 



7.8 

 2.3 



1 Von Damm et al. 1985 



2 Campbell et al . 1988 



17 



