Sökning: "titanomagnetit"

Hittade 4 uppsatser innehållade ordet titanomagnetit.

  1. 1. Baggalútar from Hvalfjörður (Iceland): Enigmatic spheroids of hydrothermally altered basaltic tephra

    Kandidat-uppsats, Uppsala universitet/Mineralogi, petrologi och tektonik

    Författare :Emmie Djuse; [2022]
    Nyckelord :Baggalútar; Iceland; basalt; Hvalfjörður; zeolites; volcanic spherulite; spheroids; Baggalútar; Island; basalt; Hvalfjörður; zeoliter; vulkaniska sfäruliter; sfäroider;

    Sammanfattning : Baggalútar are well-rounded spheroids that typically measures 16-18 mm in size and have a brownreddish appearance. They can be found in the Hvalfjörður bay in SW Iceland. LÄS MER

  3. 2. 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

  4. 3. Jämförande geokemisk studie med portabel XRF av obehandlade och sågade ytor, samt pulver av Karlshamnsdiabas

    Kandidat-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Filippa Karlstedt; [2012]
    Nyckelord :diabas; Blekinge; Karlshamn; geokemi; XRF; geochemistry; dolerite; Earth and Environmental Sciences;

    Sammanfattning : The development of XRF instruments (x-ray fluorescence) has enabled faster analysis with simple preparation of the material. It is also contemplated that one should bring the instrument in field and analyze surfaces without any sample preparation. LÄS MER

  5. 4. Magnetic grain-size analyses of Holocene sediments in the North Atlantic and Norwegian Sea : palaeoceanographic applications

    Magister-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Torbjörn Wall; [2004]
    Nyckelord :magnetic grain-size; magnetic hysteresis loops; Reykjanes Ridge; Vøring plateau; North Atlantic; Norwegian Sea; deep ocean currents; Holocene; magnetisk kornstorlek; magnetiska hysteresis-lopar; Reykjanesryggen; Vøringplatån; Nordatlanten; Norska havet; djuphavsströmmar; Holocen; Earth and Environmental Sciences;

    Sammanfattning : High-resolution magnetic hysteresis measurements were carried out on three sediment cores, one from the North Atlantic and two from the Norwegian Sea. These measurements can be used to reconstruct changes in magnetic grain-size. Physical grain-size has been interpreted as a proxy for bottom current intensity (McCave et al. LÄS MER