Figure 3. SRP versus Si relationships for water samples 



collected at Pele ' s Vent. The upper figure presents the 

 data collected during the Alvin dive expedition. The middle 

 figure presents the data collected during the Pisces V dive 

 expedition. The bottom figure is the combined data base. 

 The linear regression analyses were: SRP = 2.45 + 0.00124Si 

 ( Alvin ); SRP = 1.98 + 0.00233Si ( Pisces V); and SRP = 2.36 + 

 0.00144 Si (Alvin + Pisces V). 



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