300 



_ 200 



c 



z 



100 



300 



200 



3- 



100- 



Mg (mM) 



_a_ 



♦ ♦ ♦ 



i I l 



30 40 50 



Mg (mM) 



100 200 



Mn ( M M) 



60 



300 



Figure 4. Manganese vs. magnesium (top), iron vs. magnesium (center), and 

 iron vs. manganese (bottom) for the Axial Volcano, ASHES vent field 

 samples collected in 1986. Symbols as in Figure 3. 



42 



