Essays about: "Grängesberg"

Showing result 1 - 5 of 8 essays containing the word Grängesberg.

  1. 1. EBSD Investigation of High-Temperature Magnetite from Apatite-Iron-Oxide Deposits: Implications for the Formation of Giant Kiruna-Type Deposits

    University essay from Uppsala universitet/Mineralogi, petrologi och tektonik

    Author : Jens Henriksson; [2022]
    Keywords : Kiruna-type deposit; electron backscattered diffraction; crystal settling; Fe-O systematics; crystal alignment;

    Abstract : European iron production is to a large extent dependant on massive Kiruna type apatite-iron ore deposits. In this contribution, high-temperature magnetite samples from apatite-iron-oxide deposits are investigated by means of Electron Backscattered Diffraction. However, the origin of Kiruna-type deposits is still unresolved. READ MORE

  3. 2. Extraction of Backfilled Tailings in the Dannemora Mine – Economic Potential and Rock Stability Assessment

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : John Winlund; [2022]
    Keywords : backfilled tailings; Dannemora mine; iron ore; rock stability; stopes; återfylld anrikningssand; Dannemoragruvan; järnmalm; bergstabilitet; öppna brytningsrum;

    Abstract : The cut-off grade determines what rock mass are economic to mine. At the Dannemora mine, in eastern Bergslagen, Sweden, previously processed ore generated tailings (enrichment sand) with an iron content of 21-22 % that was backfilled into large open bodies (stopes) in the mine between 2013-2015. READ MORE

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

    University essay from Uppsala universitet/Geofysik

    Author : Andreas Bjork; [2018]
    Keywords : 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;

    Abstract : 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. READ MORE

  5. 4. Flens stadskärna : gestaltningsprogram för Flens stadskärna

    University essay from SLU/Dept. of Urban and Rural Development

    Author : Matilda Lindström; Tina Vagner; [2015]
    Keywords : gestaltningsprogram; Flen; stadskärna; gestaltning; centrumutveckling; stadsmiljöprogram; identitet; attraktivitet; trygghet; orienterbarhet; stadsutveckling; stadsplanering;

    Abstract : Detta examensarbete handlar om att utveckla ett gestaltningsprogram för Flens stadskärna och därigenom skapa en stad med bättre orienterbarhet, tillgänglighet, trygghet och med förstärkt identitet. Ett gestaltningsprogram har gestaltande avsikter och är en samling riktlinjer som används inom arkitektur, stadsbyggnad samt infrastruktur för att skapa en sammanhållen stadsmiljö (Tornberg 2008). READ MORE

  6. 5. Analogue Modelling of Ductile Deformation at Competent Lenses in Grängesberg, Bergslagen, Sweden

    University essay from Uppsala universitet/Berggrundsgeologi

    Author : Sara Eklöf; [2014]
    Keywords : competence contrast; analogue modelling; ductile deformation; competent lenses; Grängesberg;

    Abstract : The Grängesberg Mining District (GMD) is located in the western part of the Bergslagen province in south central Sweden, and is the only known apatite-iron oxide mineralization south of Norrbotten. The Grängesberg deposit is the largest of the mineralizations along GMD and consists of a line of steeply to moderately dipping 20-100 m wide lenses extending to a depth of 1. READ MORE