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Hittade 2 uppsatser som matchar ovanstående sökkriterier.

1. 1. Iron and Oxygen Isotope Signatures of Magnetite in Iron Ore of Kiruna Type

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

   Författare :Malin Andersson; [2020]
   Nyckelord :IOA-deposits; magnetite; SIMS; EBSD; Fe- and O isotopes; laser fluorination;

   Sammanfattning : Stable isotope analysis of iron and oxygen isotopes in magnetite of Kiruna-type from Sweden and Chile have been conducted to further the understanding of the formation, and advance the analysis methods of these deposits. For this, data from SIMS (secondary ion mass spectroscopy), EBSD (electron backscatter diffraction) and triple oxygen analysis (by laser fluorination) are used. LÄS MER

3. 2. Probing the Toba super-eruption: Insights from oxygen isotope geochemistry and geobarometry

   Master-uppsats, Berggrundsgeologi

   Författare :David Budd; [2011]
   Nyckelord :super-eruption; oxygen isotopes; geobarometry; Toba; magmatic plumbing; caldera;

   Sammanfattning : The Toba caldera located in north Sumatra, Indonesia, is the source of the largest volcanic eruption in the Quaternary (Rose & Chesner 1987). Its enormous volume of 2800 km3 has been a matter of debate for decades and it is still unclear where and how the Toba magma was assembled. LÄS MER