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 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.

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.

These data contains location information for the various sites covered in the data release. Locations include streambed-sediment, flood-plain core, and flood-plain sediment sampling locations along the Big River, Maddin Creek, Mineral Fork Creek, Old Mines Creek, Mill Creek, and Dry Creek.

Record amounts of precipitation fell across the Colorado Front Range from September 9 to 16, 2013, resulting in extensive flooding in the South Platte River and its major mountain tributaries. In this study, the effects of the flood on the City of Boulder, Colorado urban hydrology system were assessed using weekly time-series sampling of 3 source waters (Boulder tap water, Boulder wastewater treatment facility effluent, and Boulder Creek water) conducted from September 20 to October 16, 2012 (n=5) and August 13 to September 30, 2013 (n=8). The effect of the flood on the South Platte River was assessed using a single basin-wide sampling of 5 main stem and 7 tributary sites from September 18 to 22, 2013. Filtered water samples were analyzed at the Boulder sites, and filtered and unfiltered samples were analyzed at the South Platte River sites. Major elements were measured by inductively coupled plasma-optical emission spectrometry and trace elements were measured by inductively coupled plasma-mass spectrometry. Each sample was measured in triplicate and the averages and standard deviations are reported. The results from analyses of associated quality assurance samples (field blanks and field duplicates) also are presented.

These data contain concentrations of major and trace elements measured by inductively coupled plasma mass spectrometry at the laboratory of various size fractions (less than 0.063, less than 0.250, and less than 2 millimeters) from the middle Big River and tributaries draining the Barite District.