Sökning: "magnetisk susceptibilitet"

Visar resultat 11 - 15 av 28 uppsatser innehållade orden magnetisk susceptibilitet.

  1. 11. Characterizing magnetic susceptibility and remanent magnetization of magnetite and hematite rich drill-core samples at Blötberget

    Master-uppsats, Uppsala universitet/Geofysik

    Författare :Andreas Bjork; [2018]
    Nyckelord :Verwey; Morin; Curie; Néel; magnetite; hematite; alteration; iron-ore; quality control; kappabridge; hysteresis; susceptibility; anisotropy; Verwey; Morin; Curie; Néel; magnetit; hematit; oxidation; järnmalm; kvalitetskontroll; kappabridge; hysteresis; susceptibilitet; anisotropi;

    Sammanfattning : Laboratory magnetic measurements are used to develop a methodology to characterize the Kiruna-type Rare Earth Elements (REE) bearing apatite iron-oxide deposits at Blötberget in central Sweden. This high-grade ore deposit is known to have sharp boundaries between lens shaped main ore bodies of magnetite-rich ore, and a complex hematite-rich ore associated with pegmatites and skarn formation. LÄS MER

  3. 12. Single-Grain Zircon U-Pb Dating and Magnetic Susceptibility of Polish Loess to Determine Late Quaternary Dust Provenance and Paleoclimate

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Alexandra Engström Johansson; [2018]
    Nyckelord :dust provenance; Polish loess; paleoclimate; single-grain zircon U-Pb dating; magnetic susceptibility; härkomstområden för atmosfäriskt stoft; polsk lössjord; paleoklimat; U-Pb datering av zirkoner; magnetisk susceptibilitet;

    Sammanfattning : Windblown mineral dust has accumulated into thick loess layers across the European continent. Loess deposits are valuable paleoclimatic archives as they record climate change on centennial- to glacialinterglacial timescales. LÄS MER

  4. 13. The Formation of Granite Magma Chambers in the Mourne Mountains, Northern Ireland

    Kandidat-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Maria Björkgren; [2017]
    Nyckelord :granite; magma chamber; Mourne Mountains; space problem; AMS; granit; magmakammare; Mournebergen; space problem; AMS;

    Sammanfattning : The Mourne Mountains situated in County Down, Northern Ireland, mainly consists of solidified granite magma chambers that intruded ~ 56 million years ago into the surrounding greywacke. How granite magma chambers are emplaced in the crust has for years been a debate amongst scientist of volcanology, and is referred to as the ‘space problem’ debate. LÄS MER

  5. 14. MRI-based quantification of magnetic susceptibility: Assessment of measurement and calculation accuracy

    Master-uppsats, Lunds universitet/Medicinsk strålningsfysik, Lund; Lunds universitet/Sjukhusfysikerutbildningen

    Författare :Emma Olsson; [2016]
    Nyckelord :Medicine and Health Sciences;

    Sammanfattning : An object in an external magnetic field will be magnetized and the degree of magnetization is dependent of the magnetic susceptibility of the object. The local magnetic field inside and around an object in the MR scanner will change due to the magnetization of the object. LÄS MER

  7. 15. A palaeoenvironmental study of a peat sequence from Iles Kerguelen (49°S, Indian Ocean) for the Last Deglaciation based on pollen analysis

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Victor Henao; [2015]
    Nyckelord :Earth and Environmental Sciences;

    Sammanfattning : In recent years, the Southern Hemisphere (SH) and the vast Southern Ocean (SO) have gained awareness and importance within the scientific community in relation to global climate change and the global CO2 cycle, par-ticularly since the Last Glacial Maximum (LGM) and into the Holocene. It is believed that the Southern Hemi-sphere Westerlies (SHW) play a key role in regulating climate change in the mid-to-high latitudes of the SH, thus reconstructing the SHW latitudinal positioning since the LGM has been crucial. LÄS MER