Sökning: "seismisk tomografi"

Hittade 5 uppsatser innehållade orden seismisk tomografi.

  1. 1. Reflection Seismic Survey for Characterising Historical Tailings and Deep Targeting at the Blötberget Mine, Central Sweden

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :EMMANUEL ALOFE; [2021]
    Nyckelord :reflection seismic; exploration; tailings; sustainability; circularity; tomography; reflektion seismisk; prospektering; gruvavfall; hållbarhet; cirkularitet; tomografi;

    Sammanfattning : Iron has been an essential element to human development and iron-oxide deposits are known to host minerals that are labelled as critical raw materials (CRMs), especially in the EU. Therefore, ensuring a sustainable supply of CRMs require access to both primary and secondary sources of their host deposits such as iron oxides. LÄS MER

  3. 2. First-arrival traveltime tomography of active-source data in the Kansanshi copper mine, northern Zambia

    Magister-uppsats, Uppsala universitet/Geofysik

    Författare :Vessela Hobson; [2019]
    Nyckelord :refraction seismics; tomographic inversion; Zambian Copperbelt; copper;

    Sammanfattning : Sedimentary rock-hosted deposits are a major source of copper and cobalt, with the Neoproterozoic central African Copperbelt being among the largest Cu-Co provinces in the world, accounting for around 15% of its copper resource. The deposits occur primarily in the carbonates and siliciclastic sediments overlying the basement, and formed during early diagenesis (around 820 Ma) and late diagenesis/metamorphism during the Pan-African Orogeny (580-520 Ma). LÄS MER

  4. 3. Seismic tomography as an instrument for structural evaluation in the Printzsköld and Alliansen ore bodies, Malmberget

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Författare :Linus Jonsson; [2017]
    Nyckelord :Geology; Seismic tomography; LKAB;

    Sammanfattning : The Malmberget deposit is one of the major apatite iron ores in Europe, located in northern Norrbotten. As the mining in Malmberget proceeds deeper more challenges with the stability have been faced. When the stress distribution of a rock mass exceeds the rock strength energy in form of seismic waves is released. LÄS MER

  5. 4. Seismic tomography in the source region of the May 29th 2008 earthquake-aftershock-sequence in southwest Iceland

    Kandidat-uppsats, Geofysik

    Författare :Karin Berglund; [2012]
    Nyckelord :seismic tomography; Iceland; Mid-Atlantic ridge; seismisk tomografi; Island; mittatlantiska ryggen;

    Sammanfattning : On May 29th 2008 two earthquakes with moment magnitude of Mw ~6 occurred in the southwestern part of Iceland. The second earthquake struck within only seconds after the first, on a fault ~5 km west from the first fault. The aftershock sequence was recorded by 14 seismic stations during the subsequent 34 days. LÄS MER

  7. 5. Geofysiska mätmetoder för prospektering till ballastmaterial

    Magister-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Erik Bohlin; Ludvig Landen; [2008]
    Nyckelord :prospektering; ballastmaterial; LosAngeles test; microDeval test; kulkvarnstest; resistivitet; IP; normaliserad IP; refraktionseismik; tomografi; geofysik; geologi; aggregate prospecting; electrical resistivity imaging; induced polarization; normalized induced polarization; refraction seismics; tomography; studded tyres test; geophysics; geology; Earth and Environmental Sciences;

    Sammanfattning : The Swedish rock-mass industry is currently in a transition period because new rules and regulations strongly limit the possibility to use naturally sorted aggregates for construction and concrete purposes. Furthermore, research and development within the industry is more oriented towards crushed bedrock aggregates. LÄS MER