Sökning: "Kaapvaal craton"

Visar resultat 1 - 5 av 9 uppsatser innehållade orden Kaapvaal craton.

  1. 1. Unravelling the timing and distribution of Paleoproterozoic dyke swarms in the eastern Kaapvaal Craton, South Africa

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Camilo Esteban Gaitan Valencia; [2019]
    Nyckelord :Kaapvaal; Mashining; black hills; dyke events; U-Pb geochronology; baddeleyite; geochemistry; Earth and Environmental Sciences;

    Sammanfattning : I denna uppsats presenterar jag kristallisationsåldrar, petrografi och geokemisk sammansättning för diabasgångar och en lagergång i östra och sydöstra Kaapvaal kratonen, Sydafrika. Dessa nya resultat ger mer exakta och pålitliga resultat än tidigare dateringar för diabaser tillhörande den s.k. LÄS MER

  3. 2. New geochronological constraints on the Klipriviersberg Group: defining a new Neoarchean large igneous province on the Kaapvaal Craton, South Africa

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Joaen Stamsnijder; [2017]
    Nyckelord :LA-ICP-MS; U–Pb geochronology; ID-TIMS; baddeleyite; Klipriviersberg Group; LIP; South Africa; Earth and Environmental Sciences;

    Sammanfattning : In recent years, there has been a significant improvement in our ability to determine the ages of extensive short-lived magmatic events (large igneous provinces) dominated by rocks of mafic (silica-poor) compositions. This has been aided by targeting the magmatic feeders to these large igneous provinces (e.g. LÄS MER

  4. 3. U-Pb baddeleyite dating of intrusions in the south-easternmost Kaapvaal Craton (South Africa) : revealing multiple events of dyke emplacement

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Emilie Larsson; [2015]
    Nyckelord :U-Pb; baddeleyite; Kaapvaal Craton; mafic dykes; geochronology; Earth and Environmental Sciences;

    Sammanfattning : This study presents U-Pb baddeleyite ages for five dolerite dykes and one sill in the Mesoarchean granitic basement of south-easternmost Kaapvaal Craton in northern KwaZulu-Natal, South Africa. The oldest dyke is ENE-trending, and is dated to 2729 ± 5 Ma. LÄS MER

  5. 4. Hur bildades Bushveldkomplexet?

    Kandidat-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Filip Ivarsson; [2015]
    Nyckelord :chromite; intrusion; platinum; LIP; Bushveld Complex; Earth and Environmental Sciences;

    Sammanfattning : The Bushveld complex is the world’s largest mafic intrusion and located on the Archean Kaapvaal craton, southern Africa. The complex’s host rock has anomalous quantities of platinum-group elements (PGE), chromite and other valuable metals of high demand. LÄS MER

  7. 5. U-Pb geochronology of the Tsineng dyke swarm and paleomagnetism of the Hartley Basalt Formation, South Africa : evidence for two separate magmatic events at 1.93 – 1.92 and 1.88 – 1.84 Ga in the Kalahari craton

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Farnaz Alebouyeh Semami; [2014]
    Nyckelord :Kaapvaal; Tsineng; Hartley; baddeleyite; U-Pb geochronology; paleomagnetism; polar wander path; Kalahari; Earth and Environmental Sciences;

    Sammanfattning : Robust geochronology and well-constrained paleopoles are the main tools for paleogeographic reconstructions. Through the completion of so called barcode diagrams (matching of coeval events of mafic magmatism between blocks) and determination of the apparent polar wander paths, these studies provide a better understanding of the position of continents and supercontinents in the past. LÄS MER