Sökning: "chemostratigraphy"

Hittade 4 uppsatser innehållade ordet chemostratigraphy.

  1. 1. Volcanic facies and hydrothermal alteration at the Norra volcanigenic massive sulfide deposit : Storuman area, Sweden

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

    Författare :Meseret Gebreyesus; [2020]
    Nyckelord :Volcanic massive sulfide deposit; alteration zonation; volcanic chemostratigraphy; facies architecture;

    Sammanfattning : The Skellefte District, with a long and rich history of base metal extraction that commenced asearly as 1924, is rated amongst the leading mining provinces in Sweden and Europe. The districtrepresents a Paleoproterozoic volcanic arc hosting more than 85 known (gold-bearing) VMSdeposits and several economic grade orogenic gold occurrences. LÄS MER

  3. 2. 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

  4. 3. 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. 4. Carbon isotope chemostratigraphy of the Late Silurian Lau Event, Gotland, Sweden

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Hani Younes; [2012]
    Nyckelord :high-resolution correlation; conodonts; carbon isotope excursion; Gotland; extinction; Silurian; Lau Event; microbial resurgence; Earth and Environmental Sciences;

    Sammanfattning : The positive δ13C excursion associated with the Late Silurian Lau Event (approximately 420 Ma) is recognized globally and considered to be one of the most prominent carbon isotope excursions of the Phanerozoic. Its maximum values are exceeded only by values from the Proterozoic. LÄS MER