Sökning: "subduction"

Visar resultat 1 - 5 av 32 uppsatser innehållade ordet subduction.

1. 1. Characterization of Cu-mineralized carbonate veins in the Alta-Kvænangen Tectonic Window, Norway

   Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

   Författare :Ellen Svens; [2024]
   Nyckelord :Greenstone belt; IOCG; Svecokarelian orogeny; Alta-Kvænangen Tectonic Window; Bergmark anticline;

   Sammanfattning : The Alta-Kvænangen Tectonic Window is part of a regional greenstone belt that formed around 2.3 Ga – 2.0 Ga. The Bergmark anticline in the area has gone through greenschist to amphibolite facies metamorphism and hosts Cu, Co and Au mineralizations in hydrothermal veins, albite felsite and chemical traps. LÄS MER

3. 2. Modelling the global water cycle – the effect of Mg-sursassite on the amount of globally subducted water

   Master-uppsats, Göteborgs universitet/Institutionen för geovetenskaper

   Författare :Nils Benjamin Gies; [2021-07-05]
   Nyckelord :;

   Sammanfattning : Subduction of hydrated lithospheric mantle is the most important process regarding the transfer of significant amounts of water to depths exceeding 350 km. Hence, the interplay of the thermal structure within the subducted slab together with the PT-stability fields of hydrous ultra-high pressure phases control the dehydration of the slab and the amount of water transported into the deeper mantle. LÄS MER

4. 3. Unraveling the Tectonic History of the Aurek Metagabbro within the Seve Nappe Complex, Scandinavian Caledonides

   Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

   Författare :Sabine Rousku; [2021]
   Nyckelord :Scandinavian Caledonides; Seve Nappe Complex; Aurek metagabbro; Kebnekaise Mountains; Zircon U-Pb Geochronology; Thermodynamic modeling; Geochemistry; Skandinaviska Kaledoniderna; Seveskollan; Aurek metagabbro; Kebnekaisebergen; zirkon U-Pb geokronologi; Termodynamisk modellering; Geokemi;

   Sammanfattning : The Scandinavian Caledonides form a mountain range comprising nappe stacks of numerous far-travelled thrust sheets. The thrust sheets consist of diverse lithologies representing pre- and synorogenic sedimentary and igneous rocks subsequently metamorphosed to various degrees, from the Late Neoproterozoic to Middle Devonian. LÄS MER

5. 4. Complex REE zonations in metamorphic garnet reflect accessory mineral reactions

   Master-uppsats, Göteborgs universitet/Institutionen för geovetenskaper

   Författare :Niclas Hultin; [2020-05-29]
   Nyckelord :Rare Earth Elements; REEs; Garnet; LA-ICP-MS; Sesia zone; Metamorphism;

   Sammanfattning : A garnet from the Sesia Zone, NW Italy, was selected for Major and Rare Earth Element (REE) mapping, using LA-ICP-MS – a procedure previously not conducted at the Department of Earth Science at University of Gothenburg. The original inclusion assemblage of the garnet is preserved, and the mapping revealed two distinct changes in both garnet chemistry and inclusion assemblage, both which can be linked to the metamorphic development of the region. LÄS MER

7. 5. Conditions for Univariate SAGBI Bases

   Kandidat-uppsats, Lunds universitet/Matematik LTH; Lunds universitet/Matematik (naturvetenskapliga fakulteten)

   Författare :Rode Grönkvist; [2020]
   Nyckelord :SAGBI; SAGBI bases; univariate SAGBI bases; resultant; polynomial algebra; Mathematics and Statistics;

   Sammanfattning : This thesis describes the fundaments of SAGBI theory, including definitions, subduction, SAGBI basis verification and construction. A resultant identity is then used to demonstrate some conditions on univariate SAGBI bases for subalgebras generated by two polynomials... LÄS MER