Sökning: "porfyr"

Hittade 3 uppsatser innehållade ordet porfyr.

  1. 1. A Petrological Investigation of the Host Rocks for the Kuj-Kiirunavaara Ore

    Kandidat-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Holger Sandberg; [2018]
    Nyckelord :Kiirunavaara; optical mineralogy; hydrothermal alteration; electron microprobe; Kiirunavaara; optisk mineralogi; hydrotermal omvandling; elektron-mikrosond;

    Sammanfattning : The Kiirunavaara mine hosts one of the world’s largest apatite-iron ore mineralisations. This ore body has been subject to large amounts of research as well as extensive mining. The ore body is situated between the syenitic foot wall and the rhyodacitic hanging wall, of which consists of differing mineralogy and characteristics. LÄS MER

  3. 2. Between the east and west : The pioneer settlement of Dalarna – Studies of lithic technology and raw material use at the Middle Mesolithic site Orsa 527

    Master-uppsats, Uppsala universitet/Institutionen för arkeologi och antik historia

    Författare :Sandra Söderlind; [2016]
    Nyckelord :mesolithic; technology; lithic; technique; raw material; stone age; ash tuff; porphyry; poineer settlement; mobility; mesolitikum; teknologi; stenteknologi; teknik; råmaterial; dalarna; stenålder; asktuff; porfyr; experiment; orsa; pionjärbosättning; mobilitet;

    Sammanfattning : In this thesis the pioneer settlement of northern Dalarna is investi­gated by means of a local study of lithic technology and raw material use on the Orsa 527 site in the area. This newly excavated site will be presented, for the first time in completion, in this thesis. LÄS MER

  4. 3. Naturvärme : teknik och geologi : med en översiktlig kartläggning av tillgångarna i Kalmar län och Västerviks kommun

    Magister-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Erik Bergstedt; Arne I. Lööf; [1986]
    Nyckelord :geografi; geologi; naturvärme; teknik; Kalmar län; Västerviks kommun; Earth and Environmental Sciences;

    Sammanfattning : During the last 15 years the heatpump technology has developed rapidly in Sweden due to the increasing prices of energy. One of the major sources for the heatpump is low-temperature energy from the enviroment. This might be heat from groundwater, surface water, soil or bedrock. LÄS MER