Sökning: "The Alnö Complex"

Hittade 4 uppsatser innehållade orden The Alnö Complex.

  1. 1. Petrography and Mineral Chemistry of the Sälskär Breccia (Alnö Alkaline Complex, Central Sweden)

    Kandidat-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Vincent Gustafsson; [2022]
    Nyckelord :Alnö alkaline complex; diatreme; melilitite; pelletal lapilli; volcanic breccia; Alnö alkalina område; diatrem; melilitit; pelletal lapilli; vulkanisk breccia;

    Sammanfattning : Primitive magmas can provide important details about the mantle from which they are derived. In this thesis, petrographic observations and new mineral chemistry analyses of the Sälskär breccia from the Alnö alkaline complex, central Sweden, are reported. LÄS MER

  3. 2. Alnö Carbonatite: A Future Moneymaker?

    Kandidat-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Aklaqur Rahman; [2017]
    Nyckelord :The Alnö Complex; carbonates; rare earth elements; polarising microscope; Alnökomplexet; karbonatiter; sällsynta jordartsmetaller; mikroprob;

    Sammanfattning : Carbonatites are rare igneous rocks, which contain at least 50 %, carbonate minerals. They are often found along with alkaline silicate rocks, meaning that they contain relatively large amounts of Na2O and K2O, and important tools to understand mantle processes. LÄS MER

  4. 3. Carbonatites at the Alnö Complex, Sweden and along the East African Rift : a literature review

    Kandidat-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Alexandra Åhlén; [2015]
    Nyckelord :natrocarbonatite; East African Rift; carbonatite; Alnö Island; Earth and Environmental Sciences;

    Sammanfattning : Carbonatite is an unusual type of rock that, for a long time, were not accepted for what they really are. This group of rocks is now considered to be of igneous origin and is classified after its content of carbonate minerals. If it exceed 50% the rock will be named a carbonatite. LÄS MER

  5. 4. Petrogenesis of Carbonatites in the Alnö Complex, Central Sweden

    Master-uppsats, Institutionen för geovetenskaper

    Författare :Sherissa Roopnarain; [2013]
    Nyckelord :Petrogenesis; Carbonatite; Alnö Complex; Stable Isotope; Rare Earth Element REE ; Kimberlite; Sustainable Development; Resource Mining; Rural Landscape; Natural Heritage.;

    Sammanfattning : The Alnö Complex is a Late Precambrian alkaline and carbonatite intrusion (c. 30km2) into Early Proterozoic country rock that extends from the north east, to the north western shoulder of Alnö Island. LÄS MER