These data contain concentrations of trace elements in unsieved flood-plain samples collected along tributaries draining the Washington County Barite District.

These data contain concentrations of trace elements in flood-plain samples in various size fractions measured using x-ray fluorescence. Samples were collected along tributaries draining the Washington County Barite District.

These data contain concentrations of trace elements in flood-plain samples in various size fractions measured using x-ray fluorescence. Samples were collected along tributaries draining the Washington County Barite District.

These data contain concentrations of select trace elements in samples collected on the flood plain from flood deposits from the December 2015 flood and underlying soils. All samples were analyzed by x-ray fluorescence.

These data contain concentrations of select trace elements in samples collected on the flood plain from flood deposits from the December 2015 flood and underlying soils. All samples were analyzed by x-ray fluorescence.

These data contain concentrations of trace elements in various size fractions (less than 0.063 millimeters, 0.063 to 0.250 millimeters, 0.250 to 2 millimeters, and greater than 2 millimeters) of flood-plain core samples analyzed by inductively coupled plasma mass spectrometry (laboratory) and x-ray fluorescence (U.S. Environmental Protection Agency).

This U.S. Geological Survey (USGS) Data Release contains locations and concentrations of metals in various size fractions in floodplain-core, streambed-sediment samples, and sediment deposited on the flood plain from the December 2015 flood and underlying soils collected from along the Middle Big River and tributaries in the Southeast Missouri Barite District from 2012 to 2015. All samples were analyzed either by inductively-coupled plasma-mass spectrometry (ICP-MS) or x-ray fluorescence (XRF). Concentrations of metals in quality-assurance samples are also presented to evaluate the effect of sample splitting and compare the U.S. Environmental Protection Agency (EPA) and USGS Missouri Water Science Center XRF units. Major and trace elements included in this data release include aluminum, antinomy, arsenic, barium, beryllium, bismuth, cadmium, calcium, cerium, cesium, chromium, cobalt, copper, gallium, indium, iron, lanthanum, lead, lithium, magnesium, manganese, molybdenum, nickel, niobium, phosphorus, potassium, rubidium, scandium, silver, sodium, strontium, sulfur, tellurium, thallium, thorium, tin, titanium, tungsten, uranium, vanadium, yttrium, and zinc. These data tables are provided as machine readable access to the tables in the following publication: Smith, D.C., and Schumacher, J.G., 2018, Distribution of mining-related trace elements in streambed and flood-plain sediment along the middle Big River and tributaries in the Southeast Missouri Barite District, 2012–15: U.S. Geological Survey Scientific Investigations Report 2018–5103, 89 p., https://doi.org/10.3133/sir20185103.

These data contain concentrations of trace elements in various size fractions (less than 0.063 millimeters, 0.063 to 0.250 millimeters, 0.250 to 2 millimeters, and greater than 2 millimeters) of flood-plain core samples analyzed by inductively coupled plasma mass spectrometry (laboratory) and x-ray fluorescence (U.S. Environmental Protection Agency).

Sampled depth intervals and selected trace element concentrations as determined by X-ray fluorescence analysis of the intact floodplain cores in the Tri-State Mining District, 2011-12. All samples were collected by the U.S. Geological Survey using conventional coring methods with the exception of cores SH-FB-1 and SH-FB-4 which were collected using a plastic scoop; analysis was conducted using an x -ray fluorescence instrument owned and operated by U.S. Fish and Wildlife Service personnel following the U. S. Environmental Protection Agency Method 6200 (EPA, 2007) at the U.S. Fish and Wildlife Service and U.S. Geological Survey offices. Table Headings: Core_identifier, Site_identifier, Depth_1, Depth_2, Ave_depth, Arsenic, Cadmium, Barium, Cobalt, Copper, Manganese, Nickel, Lead, and Zinc which are explained further in the referenced data dictionary.

Sampled depth intervals and selected trace element concentrations as determined by X-ray fluorescence analysis of the intact floodplain cores in the Tri-State Mining District, 2011-12. All samples were collected by the U.S. Geological Survey using conventional coring methods with the exception of cores SH-FB-1 and SH-FB-4 which were collected using a plastic scoop; analysis was conducted using an x -ray fluorescence instrument owned and operated by U.S. Fish and Wildlife Service personnel following the U. S. Environmental Protection Agency Method 6200 (EPA, 2007) at the U.S. Fish and Wildlife Service and U.S. Geological Survey offices. Table Headings: Core_identifier, Site_identifier, Depth_1, Depth_2, Ave_depth, Arsenic, Cadmium, Barium, Cobalt, Copper, Manganese, Nickel, Lead, and Zinc which are explained further in the referenced data dictionary.