Sökning: "Yukon"

Visar resultat 1 - 5 av 11 uppsatser innehållade ordet Yukon.

  1. 1. Silver Mineralogy and Modes of Occurrence at the Silver Hart Deposit, South East Yukon.

    Master-uppsats, Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Författare :Michael Ives-Ruyter; [2023]
    Nyckelord :Canada; Yukon; silver; lead; zinc; galena; sulfosalt; sulfur isotope;

    Sammanfattning : The Silver Hart property is a high grade silver-lead-zinc deposit consisting of polymetallic vein style, manto (carbonate replacement) style, and skarn type mineralization. Host rock consists of calcareous and non-calcareous sediments of the Cassiar Platform, mainly biotite schists, limestone units, and the monzogranite unit of the Cassiar Batholith. LÄS MER

  3. 2. Conservation Genomics of the Long-tailed Duck

    Master-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning

    Författare :Brynhildur Magnúsdóttir; [2021]
    Nyckelord :Long-tailed duck; migration; conservation; population structure; genome;

    Sammanfattning : With increasingly warming climate, many bird species have been forced to respond to environmental changes, and the long-tailed duck (Clangula hyemalis) is no exception. The populations of the long-tailed duck have been in decline the past few decades and the species is classified as globally vulnerable and near threatened in both Iceland and Sweden. LÄS MER

  4. 3. Drivved I Arktis : En dendrokronologisk sammanställning över teorier och förekomster

    Kandidat-uppsats, Stockholms universitet/Institutionen för naturgeografi

    Författare :Nathalie Hallbäck; [2020]
    Nyckelord :;

    Sammanfattning : Klimatet på Arktis har förändrats genom Holocen. Under tidig holocen (10.4 år BP till 8.2 år BP)kännetecknas perioden med att glaciärerna började dra sig tillbaka och att klimatet blev varmare. LÄS MER

  5. 4. Methane flux from Carex ramenskii on coastal meadows and grazing lawns in western Alaska

    Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Kaj Lynöe; [2017]
    Nyckelord :Arctic wetlands; Greenhouse gases; CH4 emission; Plant mediated gas release; Geese grazing;

    Sammanfattning : In this study we determined the magnitude of plant mediated CH4 emission (flux) in two vegetation types of Carex ramenskii. The objectives of this paper were to quantify the proportion of CH4 emissions from plant mediated flux and the total flux (plant and soil). LÄS MER

  7. 5. Estimated Input of Mercury to Kusawa Lake, Northern Canada, from Snow and Glacial Melt Water

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Ingrid Beckholmen; [2016]
    Nyckelord :Mercury; HBV-model; Kusawa Lake; Canada; runoff; glaciers; Kvicksilver; HBV-model; Kusawa Lake; Kanada; avrinning; glaciärer;

    Sammanfattning : Unusually high levels of mercury (Hg) have been detected in several northern Canadian lakes, remote from human industrial activities. At Kusawa Lake, a subalpine glacier-fed mountain lake situated in the Yukon Territory (western Canada), measurements of Hg in caught fish are below, but worryingly close to, the Health Canada guideline for safe fish consumption of 0. LÄS MER