Trace elements, by Group: Stream sediment chemistry (with geologic province overlay)

Multifractal IDW Interpolation

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(Click on image for larger view, click on name for normal probability plot:)

Alkaline Earths:

                                         Ba                                                 Sr

First-row Transition elements:

                        Sc                                                      V

Heavy-mineral suite: (Rare earths)

            Ce                               La                                Nd                          Ce/Yb(n) 

Heavy-mineral suite: (other)

               Y                                 Th                             U                               Zr

Base and toxic metals*

 (*Samples exceeding freshwater guidelines included in figure (MacDonald, 2000))

               Cu                                                 Pb                                               Zn

                  As                                                 Hg

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Direct questions and comments to:

Gilpin R. Robinson

U.S. Geological Survey

Email grobinso@usgs.gov 

Phone (703)-648-6113