Sökning: "mineral magnetic content"

Visar resultat 1 - 5 av 12 uppsatser innehållade orden mineral magnetic content.

  1. 1. Magnetic Mineralogy of Nb-bearing Carbonatites from Oldoinyo Dili (Tanzania)

    Kandidat-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Julia Frejd; [2021]
    Nyckelord :carbonatites; niobium; rare earth elements; Oldoinyo Dili; magnetic properties; karbonatiter; niob; rare earth elements; Oldoinyo Dili; magnetiska egenskaper;

    Sammanfattning : Niobium (Nb) and Rare Earth Elements (REE’s) have in recent years received considerable attention because of their importance to the modern technical industry, and more specifically the enhanced sustainability that comes with them. The main source for Nb and REE’s on Earth are carbonatites and associated alkaline silicate rocks. LÄS MER

  3. 2. Deep Learning-Based Skeleton Segmentation for Analysis of Bone Marrow and Cortical Bone in Water-Fat Magnetic Resonance Imaging

    Master-uppsats, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Författare :Adham Belbaisi; [2021]
    Nyckelord :Water-fat MRI; UK Biobank; Deep learning; Skeleton segmentation; Bone marrow; Cortical bone;

    Sammanfattning : A major health concern for subjects with diabetes is weaker bones and increased fracture risk. Current clinical assessment of the bone strength is performed by measuring Bone Mineral Density (BMD), where low BMD-values are associated with an increased risk of fracture. LÄS MER

  4. 3. Flotation of Yxsjöberg historical tungsten ore tailings

    Master-uppsats, Luleå tekniska universitet/Mineralteknik och metallurgi

    Författare :Princess Rochelle Gan; [2019]
    Nyckelord :;

    Sammanfattning : Tailings dams, due to their sheer size and metal content, pose safety and environmental hazards. The Småltjarnen repository, which hosts material from the largest known tungsten mineralization in Sweden named the Yxsjöberg deposit, is estimated to contain 2. LÄS MER

  5. 4. Geometallurgical approach to understand how the variability in mineralogy at Zinkgruvan orebodies affects the need for copper activation in the bulk rougher-scavenger flotation

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

    Författare :Ivan Belo Fernandes; [2017]
    Nyckelord :Geometallurgy; Zinkgruvan; Zn-Pb flotation; ore variability; mineral chemistry; pyrrhotite; magnetic separation;

    Sammanfattning : Zinkgruvan is a Pb-Zn-Ag deposit located in south-central Sweden, owned and operated by Lundin Mining. The ore is beneficiated by a collective-selective flotation circuit, recovering both galena and sphalerite in a bulk rougher-scavenger flotation stage and later on separating them into two final products. LÄS MER

  7. 5. Exploring long-term trends in hypoxia (oxygen depletion) in Western Gotland Basin, the Baltic Sea

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Tianzhuo Liu; [2012]
    Nyckelord :Baltic Sea; hypoxia; lead analysis; lamination; mineral magnetism; loss on ignition; magnetotactic bacteria; Östersjön; hypoxi; bly analys; laminering; glödgningsförlust; magnetotactic bakterier; Earth and Environmental Sciences;

    Sammanfattning : Övergödningen är ett av de största hoten mot Östersjöns miljö. Den orsakar inte bara algblomning under sommarhalvåret utan även syrebrist (hypoxi). Utbredningen av syrefria bottnar i Östersjön har ökat fyrfaldigt sedan 1960-talet till följd av ökade utsläpp av näringsämnen, så som fosfor och kväve. LÄS MER