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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...
Ammonia is an important air and water pollutant, but the spatial variation in its concentrations presents technical difficulties in accurate determination of ammonia emissions from animal feeding operations. The objectives of this study were to investigate the relationship between ammonia volatilization and delta15N of dairy manure and the feasibility of estimating ammonia losses from a dairy facility using chemical markers. In Exp. 1, the N/P ratio in manure decreased by 30% in 14 d as cumulative ammonia losses increased exponentially. Delta 15N of manure increased throughout the course of the experiment and delta15N of emitted ammonia increased (p<0.001) quadratically from -31 per thousand to -15 per thousand....


    map background search result map search result map 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 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