Sökning: "Baddeleyit"
Visar resultat 1 - 5 av 12 uppsatser innehållade ordet Baddeleyit.
1. Petrography of impactites from the Dellen impact structure, Sweden
Master-uppsats, Lunds universitet/Geologiska institutionenSammanfattning : Identification and characterization of shock-metamorphic features in hypervelocity impact craters is important for our understanding of how shock waves interact with geologic materials and how impact craters form, which in turn is essential to our understanding of what role impact cratering played in the development of our solar system. Of particular interest are accessory minerals like apatite, which contains various volatiles that can affect the atmosphere of a body, or magnetite whose magnetic properties constitute a remote sensing indicator which allows us to study and understand the internal structures of distant bodies. LÄS MER
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 institutionenSammanfattning : 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
3. 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 institutionenSammanfattning : 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
4. U-Pb baddeleyite geochronology and geochemistry of the White Mfolozi Dyke Swarm : unravelling the complexities of 2.70-2.66 Ga dyke swarms on the eastern Kaapvaal Craton, South Africa
Master-uppsats, Lunds universitet/Geologiska institutionenSammanfattning : Numerous mafic dykes of different generations and trends intrude the eastern part of the Kaapvaal Cra-ton. On eastern Kaapvaal, there are three previously investigated dyke swarms that appear to radiate out from the eastern lobe of the Bushveld Complex. The NE- and E trending branches comprise dykes dated at ca. LÄS MER
5. Texturella studier och analyser av Baddeleyitomvandlingar i zirkon : exempel från sydöstra Ghana
Kandidat-uppsats, Lunds universitet/Geologiska institutionenSammanfattning : Baddeleyit är en zirkoniumoxid som normalt sett inte är stabil i kiselmättade miljöer, utan då omvandlas till zirkon. Mitt arbete kommer att handla om ett extremfall då baddeleyit har påträffats i en kvartsit i södra Ghana. Zirkoner med baddeleyitomvandlingar hittas precis vid kontakten till en deformerad granit. LÄS MER
