Filters: Tags: Atomic Absorption Analysis (X)12 results (15ms)
Determination of White Phosphorus Residues in Ducks: An Atomic Emission Detection/Compound-Independent Calibration-Based Method of Generating Residue Data for Risk Assessment and Environmental Monitoring
Effects of Animal Size on Concentrations of Metallothionein and Metals in Periwinkles Littorina littorea Collected from the Firth of Clyde, Scotland
Digital Data from Mineral Investigation of Sangre de Cristo Wilderness Study Area, Alamosa, Custer, Fremont, Huerfano, and Saguache Counties, Colorado, USA
This Data Release provides tabular and geospatial data digitized by the U.S. Geological Survey (USGS) from a U.S. Bureau of Mines (USBoM) report titled Mineral Investigation of Sangre de Cristo Wilderness Study Area, Alamosa, Custer, Fremont, Huerfano, and Saguache Counties, Colorado. The original preliminary paper report, numbered Mineral Land Assessment 65-83 (MLA 65-83; Ellis and others, 1983), presented the results of a mineral resource potential survey of areas in and around the Sangre de Cristo Range flanking the northeastern extent of San Luis Valley in south-central Colorado. Included in this Data Release are georeferenced scans of the regional plate maps, digitized sample site locations, analytical...
Whole rock geochemical data for altered and mineralized rocks,Red Dog Zn-Pb-Ag district, western Brooks Range, Alaska
This report presents geochemical analyses for 220 mostly altered andmineralized rock samples from the Red Dog Zn-Pb-Ag district in thewestern Brooks Range of northern Alaska. These data form the basisfor a study by Slack et al. (2004a) on hydrothermal silicificationand related alteration in wall rocks of the Red Dog deposits and theAnarraaq deposit 10 km to the northwest. The sulfide deposits occurwithin the Ikalukrok unit (informal name) of the Mississippian KunaFormation (Moore and others, 1986). Principal rock types that wereanalyzed include black and gray shale, unmineralized bedded barite,mineralized (sulfide-rich) bedded barite, sulfide-rich silica rock(replaced barite), massive and semimassive sulfide, vein...
Analytical results for stream sediment and soil samples from the Commonwealth of Puerto Rico, Isla de Culebra, and Isla de Vieques
Geochemical data from 2560 stream sediment samples collected in Puerto Rico, 421 soil samples collected on Isla de Vieques, and 35 soil samples were collected on Isla de Culebra, analyzed by semiquantitative spectrographic methods.
Environmental impact of the Helen, Research, and Chicago mercury mines on water, sediment, and biota in the Upper Dry Creek watershed, Lake County, California
Data from field sampling of tailings, waste rock, sediment, and water at the mines, along with water, sediment, and biota in a pond and tributaries that drain from the mine area, to help assess the chemical hazards due to historic mining.
Whole Rock Geochemical Data For Paleozoic Sedimentary Rocksof the western Brooks Brooks Range, Alaska
This report presents geochemical analyses for 210 unaltered andunmineralized rock samples of Paleozoic age in the western BrooksRange of northern Alaska. These data form the basis for a studyby Slack et al. (2004a) on the provenance and depositionalhistory of the Paleozoic strata, and on their metallogenicsignificance relative to the formation of large stratabound Zn-Pb-Ag deposits in the Red Dog mining district. Principal rocktypes that were analyzed include shale, siltstone, sandstone,chert, bedded siliceous rock, and calcareous radiolarite;selected samples of limestone, phosphate, and argillite, and onesiderite concretion, were also analyzed. Note that the phosphatesamples are from the central Brooks Range, east...
Geochemical characterization of solid media from three watersheds that transect the basal contact of the Duluth Complex, northeastern Minnesota
To document regional water quality in areas of potential base-metal mining, bedrock, soil, streambed sediment, and surface-water samples were collected and analyzed in three watersheds that cross the basal part of the Duluth Complex (northeastern Minnesota). The three watershed each had different mineral-deposit settings: (1) copper-nickel-platinum group element mineralization (Filson Creek), (2) iron-titanium-oxide mineralization (St. Louis River), and (3) no identified mineralization (Keeley Creek). At least 10 bedrock, 30 soil (two from 15 sites), and up to 13 streambed sediment samples were collected in each watershed and analyzed for 44 major and trace elements by a combined method using a combined inductively...
Major- and trace-element concentrations in soils from northern California: Results from the Geochemical Landscapes project pilot study
Regional-scale geochemical survey designed to serve as a baselinefor further analyses, and to understand effects of historical miningin the area.
Uranium in surface waters and sediments affected by historical mining in the Denver West 1:100,000 quadrangle, Colorado
Geochemical analysis of stream waters and sediments in mountainous areas immediately west of Denver, Colorado, to evaluate the concentration and distribution of uranium-bearing acid drainage originating from historical mines
The USGS examined mercury (Hg) concentrations in fish populations inhabiting impacted and reference streams as part of an investigation into the transport of trace metals in a watershed impacted by legacy mercury mining downstream from the Cinnabar mine site, Valley County, ID. Fish were sampled through an electrofishing survey utilizing a two-pass quantitative depletion approach where possible. Five reaches were selected in the Sugar Creek/Cinnabar Creek watershed, including two background reaches (ID020; ID021) with negligible mining impacts, Cinnabar Creek above the confluence with Sugar Creek (ID019), and two sites on Sugar Creek below the confluence with Cinnabar Creek (ID018 and ID010). Juvenile Bull trout...