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The use of biodynamic models to understand metal uptake directly from sediments by deposit-feeding organisms still represents a special challenge. In this study, accumulated concentrations of Cd, Zn and Ag predicted by biodynamic modelling in the lugworm Arenicola marina have been compared to measured concentrations in field populations in several UK estuaries. The biodynamic model predicted accumulated field Cd concentrations remarkably accurately, and predicted bioaccumulated Ag concentrations were in the range of those measured in lugworms collected from the field. For Zn the model showed less but still good comparability, accurately predicting Zn bioaccumulation in A. marina at high sediment concentrations but...
Categories: Publication; Types: Citation; Tags: Ag, Biodynamic model, Cd, Deposit-feeder, Zn
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This dataset has been modified from its original version. the original aglands layer described below was modified by erasing the irrigated lands (2007) produced by the Wyoming Water Development Commission, resulting in a representation of dryland Agriculture in Wyoming. NOTE: this data was modeled as noted below, and should be used with caution. "This dataset represents croplands of Wyoming as interpreted from 1:58,200-scale National High Altitude Program (NHAP) color infrared aerial photography. The photos, which were taken in 1980-1982, were interpreted and land use designations were hand-drawn onto plots produced at the same scale as the photos, using a light table. Valid polygons include irrigated croplands,...
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This dataset was developed for the BLM Rapid Ecoregional Assessment for the Central Yukon and contains a database of descriptions of historic (inactive and closed) mines based on the Alaska Resource Data File (ARDF).
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This data release provides electron microprobe geochemical data that was collected as part of a scoping study to evaluate whether unconventional critical element resources may be associated with sediment-hosted copper systems in the Midcontinent Rift. We report abundances of trace elements in native copper and sulfide minerals in 12 thin sections from samples of the Mesoproterozoic lower Nonesuch Formation that were collected from underground exposures in the White Pine deposit. Approximately 350 spots were analyzed for Cu, Pb, Zn, Fe, Ni, Co, As, Sb, Ag, Hg, and S. The electron microprobe data were collected by personnel of the Central Region Minerals Program in Denver, Colorado, for the U.S. Geological Survey...
Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Ag, Antimony, Arsenic, As, Central Region Minerals Program, All tags...
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Sediment hosted gold deposits in Nevada were first mined in the 1960s from open pit mines with large tonnage and low grade resources. Since that time, continuing exploration and discovery have identified extraordinary resources, and together these deposits now form the second-largest gold endowment on Earth, surpassed only by the Witwatersrand Gold Fields of South Africa. The data herein are part of a larger U.S. Geological Survey (USGS) project to develop an updated geospatial database of mines, mineral deposits and mineral regions in the United States. The point and polygon layers within this database represent locations of mines, mineral occurrences (which includes deposits and prospects), and mining...


    map background search result map search result map Dryland Agricultural Land Use of Wyoming at 1:58,200 Mines, Mineral Occurrences, and Mining Districts in the Carlin Area, Nevada BLM REA CYR 2013 Locations of Active Mines in Central Yukon BLM REA CYR 2013 Locations of Historic Mines in Central Yukon BLM REA YKL 2011 YKL DV H Alaska ARDFDataset ISER BLM REA YKL 2011 Alaska Resource Data File BLM REA SNK 2010 Alaska Resource Data File (ARDF) - mines Table of electron probe microanalyses of native copper and sulfide minerals from the White Pine sediment-hosted copper deposit, Michigan Table of electron probe microanalyses of native copper and sulfide minerals from the White Pine sediment-hosted copper deposit, Michigan Mines, Mineral Occurrences, and Mining Districts in the Carlin Area, Nevada Dryland Agricultural Land Use of Wyoming at 1:58,200 BLM REA YKL 2011 YKL DV H Alaska ARDFDataset ISER BLM REA SNK 2010 Alaska Resource Data File (ARDF) - mines BLM REA CYR 2013 Locations of Active Mines in Central Yukon BLM REA CYR 2013 Locations of Historic Mines in Central Yukon BLM REA YKL 2011 Alaska Resource Data File