These results represent only one pond and one type of evaporite mineral (thenardite) 

 and therefore the results of these preliminary studies should not be extrapolated to other sites. 

 More work is currently underway to determine the mechanisms responsible for the distribution 

 of trace elements between the solution and solid phases. Future studies will be expanded to 

 include different evaporite minerals from a number of different locations. 



O 



Q 



o 



10' 



10' 



10- 



10* : 



10^ 



10' 



O S04/Se 



• S04/B 



D SO4/M0 



A S04/AS 



SOLID PHASE 

 "DEPLETED IN 

 TRACE ELEMENT 



i 



DISTRIBUTION 

 COEFRCIENT r 1 



O^ 



o 



A 



o 



SOLID PHASE 



ENRICHED IN 

 TRACE ELEMENT 



10 



lO'' lo-" 



SOLUTION PHASE RATIO 



10* 



10- 



Figure 7.1 Trace Elements Associated with Evaporites from Evaporation Ponds 



page 7.2 



