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Sediment samples were collected from the river bed at 10 km intervals and have been analysed for eU, eTh, %K, 226Ra, Ca, Ti, Mn, Zn, Rb, Sr, Y, Zr, Ba, La and Ce. R-mode factor analysis was used to describe the relationship among 15 remotely sensed and geochemical data sets (variables) for the Gediz River. Four factors were extracted in the sediments and they account for 57.6% of the total variance in the data. These factors are interpreted as granite (felsic), economy, volcano and industry factors, respectively.

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