These data contain concentrations of major and trace elements in quality-assurance samples.These are the machine-readable
versions of Tables 2 5 from the U.S. Geological Survey Scientific Investigations Report, Distribution of Mining
Related Trace Elements in Streambed and Floodplain Sediment along the Middle Big River and Tributaries in the Southeast Missouri
Barite District, 2012-15 (Smith and Schumacher, 2018).<br> <br> Table_2 contains concentrations of major and trace elements
in regular and replicate streambed-sediment samples in samples BR-02 and BR-04. Each sample was sieved and analyzed for concentrations
within the less than 2-, less than 0.250-, and less than 0.063-mm size fraction. Averaged relative percent difference (RPD)
values were calculated for each metal and size-fraction combination.<br> <br> Table_3 contains concentrations of major and
trace elements in standard reference materials measured by the U.S. Environmental Protection Agency's (EPA's) x-ray fluorescence
(XRF) unit. <br> <br> Table_4 contains concentrations of major and trace elements in standard reference materials measured
by the U.S. Geological Survey (USGS) Missouri Water Science Center's XRF unit. <br> <br> Table_5 contains concentrations
of major and trace elements in quality-assurance blank samples before and after splitting and sieving.
other Citation Details
Cinergi keyword enhanced.File generated at Wed Dec 05 04:30:37 UTC 2018
purpose:
These data were used to determine the effect of splitting and sieving, the accuracy of each XRF unit, and whether splitting
and sieving equipment were introducing contamination into samples.