Sökning: "siltsten"

Visar resultat 1 - 5 av 7 uppsatser innehållade ordet siltsten.

  1. 1. Assessing the biodiversity crisis within the Triassic-Jurassic boundary interval using redox sensitive trace metals and stable carbon isotope geochemistry

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Halla Margrét Viðarsdóttir; [2020]
    Nyckelord :Stenlille; Schandelah; redox conditions; C-isotopes; marine sediments; trace elements; enrichment factors; mass extinction; Triassic – Jurassic boundary; Earth and Environmental Sciences;

    Sammanfattning : Around the Triassic-Jurassic-Boundary time interval, a severe mass extinction event occurred, which has been associated to volcanism of the Central Atlantic Magmatic Province (CAMP). Significant amounts of greenhouse gases as carbon dioxide (CO2) or methane (CH4) and other volatiles are suggested to have been released into the atmosphere, leading to global warming with subsequent impact on the biosphere. LÄS MER

  3. 2. Petrophysic of the Host-rock to the Ore in the Lovisa Mine, Bergslagen

    Kandidat-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Oscar Gilljam Päärt; [2019]
    Nyckelord :Petrophysics; density; magnetic volume susceptibility; natural remanent magnetization; Bergslagen; lithology; Petrofysik; densitet; magnetisk susceptibilitet; naturlig magnetisk remanens; Bergslagen; lithologi;

    Sammanfattning : The Bergslagen region has three base-metal mines operating today, and one of them is the Lovisa mine, which host a Zn-Pb-Ag deposit. The Lovisa mine is located in the Guldsmedshyttan area north of Lindesberg. LÄS MER

  4. 3. A geophysical survey (TEM; ERT) of the Punata alluvial fan, Bolivia

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Joakim Mårdh; [2017]
    Nyckelord :electromagnetic; geophysics; TEM; Punata; alluvial fan; Earth and Environmental Sciences;

    Sammanfattning : The Punata alluvial fan, situated in central Bolivia (Valle Alto) between the Altiplano and the lowlands, is an important aquifer for the local rural population. Due to rapid development and population growth in the area, the demand for fresh water has increased in recent year. LÄS MER

  5. 4. Sedimentological study of the Jurassic and Cretaceous sequence in the Revinge-1 core, Scania

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Casandra Hajny; [2016]
    Nyckelord :Jura; Krita; Vomb; Fyledalen; Vitabäck; Arnagergrönsand; Mollusker; Bivalver; Palynologi; Biostra-tigrafi; Vulkanism; Pyrit; Järnooider; Jurassic; Cretaceous; Vomb Trough; Vitabäck Clay; Fyledal Clay; Arnager Greensand; Molluscs; Bivalves; Palynology; Biostratigraphy; Volcanism; Pyrite; Iron ooids; Earth and Environmental Sciences;

    Sammanfattning : This thesis presents a study of the core from the Revinge-1 borehole from the Vomb Trough. The core displays strata from the Upper Jurassic to the Upper Cretaceous including strata covering the the J/K−boundary . LÄS MER

  7. 5. De mellankambriska oelandicuslagren på Öland : stratigrafi och faciestyper

    Kandidat-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Johan Malmgren; [2016]
    Nyckelord :Öland; Sverige; kambrium; trilobiter; Acadoparadoxides oelandicus; Ellipsocephalus polytomus; Earth and Environmental Sciences;

    Sammanfattning : The thesis deals with a drill core retrieved from northern Öland, Sweden, in 2010. The length of the core is c. 107 m and comprises an Ordovician and Cambrian succession. The middle Cambrian primarily consists of fossiliferous mudstone with thin siltstone beds. LÄS MER