Sökning: "Hydrothermal Alteration"

Visar resultat 16 - 20 av 26 uppsatser innehållade orden Hydrothermal Alteration.

  1. 16. Determining host rock protolith in an altered VMS deposit in the Rävliden area, North Sweden

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Zana Mataruga; [2016]
    Nyckelord :Rävliden; lithogeochemistry; immobile elements; protolith; alteration; Rävliden; lithogeokemi; immobila element; protolit; omvandlingar;

    Sammanfattning : The Rävliden mine is located in the Skellefte district in northern Sweden. In close proximity lays the Kristineberg deposit containing zinc, copper and lead ore which has been mined since the 1940’s. The district is rich in massive sulphide deposits and the mining history can be dated back to the 1920’s. LÄS MER

  3. 17. U-Pb geochronology and geochemistry of host rocks to the Bastnäs-type REE mineralization in the Riddarhyttan area, west central Bergslagen, Sweden

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Wictor Linders; [2016]
    Nyckelord :Riddarhyttan; REE; Metavolcanic rocks; LA-ICP-MS; Zircon; Monazite.; Earth and Environmental Sciences;

    Sammanfattning : The geochronology of felsic metavolcanic rocks hosting the Bastnäs-type rare earth element (REE) mineralization in the Riddarhyttan area in the Bergslagen region, Sweden, was investigated using Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) U-Th-Pb on zircon and monazite. U-Pb data from four host rock samples yield dates of 1899 ± 4 Ma (MSWD=2. LÄS MER

  4. 18. Alteration of the Bjursås Ore Field, Oxberg, Bergslagen District, Sweden

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Tomas Lindeberg; [2015]
    Nyckelord :Bergslagen; Bjursås; Oxberg; alteration; base metals; VHMS; Large box plot; chemostratigraphy; Bergslagen; Bjursås; Oxberg; omvandling; basmetaller; VHMS; Large låddiagram; kemistratigrafiskt-tvärsnitt; vektorer;

    Sammanfattning : The Bjursås ore field is located within the Bergslagen domain of central Sweden just northwest of the town of Falun. The field hosts small scale mines such as the 17th century Floberg copper mine and has been the focus of mineral exploration on several occasions during the 20th and early 21th century, with no major economic deposits being uncovered as of yet. LÄS MER

  5. 19. Understanding igneous processes through zircon trace element systematics : prospects and pitfalls

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Marín Ósk Hafnadóttir; [2014]
    Nyckelord :plagioclase fractionation. zirkon; hydrothermal alteration; precambrian; zircon; Ghana; hydrotermal-omvandling; plagioklasfraktionering; Earth and Environmental Sciences;

    Sammanfattning : Zirkon från magmatiska bergarter extraherades från fem granitoider i Birimianterrängen i Ghana., och detritala zirkoner provtogs från sex platser i centrala Västgrönland. Av dessa härrör en population från palaeoproterozoikum i Prøvens magmatiska komplex. LÄS MER

  7. 20. REE mineralisation and metasomatic alteration in the Olserum metasediments

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Wayne Fullerton; [2014]
    Nyckelord :metasediment; metasomatism; mineralisation; monazite; Olserum; REE; xenotime; Earth and Environmental Sciences;

    Sammanfattning : The Olserum mineralisation is situated in the metasediments of the Västervik formation, which repre-sents the southernmost continental margin of the Svecokarelian Domain. After deposition between 1.88 – 1.85 Ga these sediments were subsided to a depth of about 10 km and intruded by a series of granitoid melts. LÄS MER