STUDY NUMBER 10.6 



ORGANIZATION ; University of Montana, Geology Department 



TITLE OF STUDY ; Transport Phases and Grain Size Associations 

 of Metals in Sediment of a Contaminated River System 



CONTACT(S) ; Edward J. Brook, Department of Geology - 243-2141 



Johnny Moore, Department of Geology - 243-2141 



OBJECTIVES ; 1) Determine the magnitude of contamination in the 

 river sediments, 2) determine what chemical species are trans- 

 porting metals in those sediments, 3) investigate the extent 

 of any relationship between metal content and grain size distri- 

 bution. 



DURATION : 1986 - 1987 



CURRENT STATUS : Samples of recently deposited sediments have 

 been collected from selected locations on the river between Warm 

 Springs Ponds and Milltown Reservoir and from the Blackfoot River, 

 Little Blackfoot River and Flint Creek. 



Samples are analyzed by induction coupled plasma spectro- 

 phometry or atomic absorption spectrophometry. Total sediment 

 metal concentrations are determined for each site and total con- 

 centrations are determined in each of six size fractions. Each 

 size fraction is subjected to four sequential chemical extractions 

 designed to remove metals associated with various transport 

 phases. .-...,.._. 



Data from the analyses will be compared and contrasted with 

 published data to evaluate mechanisms of transport. 



PUBLICATIONS AND REPORTS 



The data will be used in the preparation of a thesis. 



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