Sökning: "mineral magnetism"

Visar resultat 1 - 5 av 10 uppsatser innehållade orden mineral magnetism.

  1. 1. Paleomagnetic and Thermomagnetic Studies on Rock Samples from COSC - 1 Drilling Project

    Master-uppsats, Uppsala universitet/Geofysik

    Författare :Wanyi Li; [2022]
    Nyckelord :Scandinavian Caledonides; remanent magnetization; AF demagnetization; temperature dependent magnetic susceptibility; Skandinaviska Kaledoniderna; remanent magnetism; växelfältsavmagnetisering; temperaturberoende av magnetisk susceptibilitet;

    Sammanfattning : The COSC-1 borehole located in the Lower Seve nappe of the Central Scandinavian Caledonides is intended to study the tectonic evolution of the Paleozoic orogen. The drilling project reached a depth of 2495.8m and obtained samples from different lithologal units of mica schist, amphibolite, gneiss, and mylonitic gneisses. LÄS MER

  3. 2. Investigation into the Loess-Palaeosol and Red Clay Record from the Pliocene- Quaternary Chinese Loess Plateau Using In-Phase and Out-OfPhase Magnetic Susceptibility

    Kandidat-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Rebecca Jacobson; [2018]
    Nyckelord :loess; Chinese Loess Plateau; magnetic susceptibility; out-of-phase; viscous relaxation; lössjord; Kinesiska Lössjordsplatån; magnetiska känsligheter; ur-fas; viskös relaxation;

    Sammanfattning : Loess is a well sorted, fine grained, windblown (aeolian) sediment and deposits as a blanket over large areas, reaching from a few centimetres to several hundreds of meters in height and can drape large landscapes in form of mountains. During a more humid and warmer climate, redox conditions are changed in the loess deposits, with greater seasonal moisture creating greater soil formation (pedogenesis), i. LÄS MER

  4. 3. Exploring long-term trends in hypoxia (oxygen depletion) in Western Gotland Basin, the Baltic Sea

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Tianzhuo Liu; [2012]
    Nyckelord :Baltic Sea; hypoxia; lead analysis; lamination; mineral magnetism; loss on ignition; magnetotactic bacteria; Östersjön; hypoxi; bly analys; laminering; glödgningsförlust; magnetotactic bakterier; Earth and Environmental Sciences;

    Sammanfattning : Övergödningen är ett av de största hoten mot Östersjöns miljö. Den orsakar inte bara algblomning under sommarhalvåret utan även syrebrist (hypoxi). Utbredningen av syrefria bottnar i Östersjön har ökat fyrfaldigt sedan 1960-talet till följd av ökade utsläpp av näringsämnen, så som fosfor och kväve. LÄS MER

  5. 4. Comparison between two sediment X-ray Fluorescence records of the Late Holocene from Disko Bugt, West Greenland : paleoclimatic and methodological implications,

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Oskar Jäckel; [2009]
    Nyckelord :Disko Bugt; X-ray fluorescence; mineral magnetism; magnetic susceptibility; paleomagnetism; bromine; productivity; Medieval Warm Period; Earth and Environmental Sciences;

    Sammanfattning : Popular summary: X-raying the climate archive of Disko Bugt. Disko Bugt is a large bay in West Greenland north of the Arctic Circle. Because of the influence of the relatively warm ocean current coming from the south; the West Greenland Current, it has a mild climate despite its latitude. LÄS MER

  7. 5. An environmental magnetic study of a marine sediment core from Disko Bugt, West Greenland : implications for ocean current variability

    Magister-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Jonas Persson; [2008]
    Nyckelord :Disko Bugt; mineral magnetism; environmental magnetism; magnetic susceptibility; ARM; SIRM; IRM; HIRM; miljömagnetism; magnetisk mottaglighet; Earth and Environmental Sciences;

    Sammanfattning : An 11 m long marine sediment core was collected during a June-July 2007 scientific cruise with the German research vessel R/V Maria Sibylla Merian to the area of Disko Bugt, western Greenland. The core, designated 343340-6-1, was examined using environmental magnetic methods and X-ray fluorescence. LÄS MER