Sökning: "meteorite"

Visar resultat 1 - 5 av 18 uppsatser innehållade ordet meteorite.

  1. 1. Petrography of impactites from the Dellen impact structure, Sweden

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Robert Mroczek; [2023]
    Nyckelord :Dellen; Impact; structure; magnetite; apatite; shock waves; shock-metamorphic; features; Impactite; petrography; scanning electron microscope; SEM; geology; Earth and Environmental Sciences;

    Sammanfattning : 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

  3. 2. Hållbar besöksnäring inom geoturism : En fallstudie gällande Geopark Siljan, Dalarna

    Kandidat-uppsats, Högskolan i Gävle/Samhällsbyggnad

    Författare :Jessika Torneport; [2021]
    Nyckelord :Geoparks; tourism; natural impact; soil wear; erosion; climate change; regional development.; Geoparker; besöksnäring; naturpåverkan; markslitage; erosion; klimatförändring; regional utveckling.;

    Sammanfattning : Dalarnas län har berikats med Geopark Siljan som är Sveriges första internationella geopark. Med sin spännande historia väcker geoparken ett ökatintresse för naturvärde och geologi hos de som besöker geoparken. LÄS MER

  4. 3. Impactites from the Hiawatha crater, North-West Greenland

    Master-uppsats, Stockholms universitet/Institutionen för geologiska vetenskaper

    Författare :Jacob Gustafsson; [2020]
    Nyckelord :Hiawatha; impact crater; Cape York; Baffin Bay; Greenland Ice Sheet; Younger Dryas; meteorite; impactite; organic carbon; conifer; vitrinite reflectance; Ro; cellular texture; chromite; chromium isotope; toasted quartz; ballen quartz; melted carbonate; granular zircon; planar deformation feature;

    Sammanfattning : The recent discovery of the 31-km-wide Hiawatha impact crater has raised unanswered questions about its age, impactor and highly unusual organic carbon component. Previous research suggests a fractionated iron meteorite impactor, a probable maximum 3–2.4 Ma impact age and a possible Younger Dryas impact age. LÄS MER

  5. 4. Determination of the Orbit and Dynamic Origin of Meteoroids

    Kandidat-uppsats, Uppsala universitet/Institutionen för fysik och astronomi

    Författare :Jennifer Andersson; [2018]
    Nyckelord :;

    Sammanfattning : One method that can be used to identify the dynamic origin and specific parent bodies of Earth crossing meteoroids is the determination of the meteoroids’ orbital evolution. In this study, a Python-based program using the REBOUND software integration package to integrate meteoroid orbits backwards in time is developed. LÄS MER

  7. 5. Chemical composition of giant planet hosts

    Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

    Författare :Frida Ekstrand; [2017]
    Nyckelord :chemical composition; planet hosts; stellar twins; differential abundance analysis; Physics and Astronomy;

    Sammanfattning : Does the formation of planets give imprints on the chemical composition of the host star? In order to test this theory a differential abundance analysis (i.e. comparing two stars' abundances to each other) was carried out on a few stars with and without known planets, to see if any differences were found. LÄS MER