Sökning: "magmatic degassing"

Hittade 4 uppsatser innehållade orden magmatic degassing.

  1. 1. Implications of Magma and Bedrock Interaction, a Study of Xenopumice from La Palma, the Canary Islands

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Beatrice Jägerup; [2019]
    Nyckelord :La Palma; xenopumice; phreatomagmatism; whole rock geochemistry; oxygen isotopes; La Palma; felsiska xenoliter; explosiv vulkanism; geokemi; syreisotoper;

    Sammanfattning : This thesis focuses on frothy, felsic xenoliths called ‘xenopumice’, that were retrieved from La Palma during a 10–day field campaign in December 2018. There are only few descriptions of these frothty xenoliths, and a consensus on their origin has not yet been achieved. LÄS MER

  3. 2. Behaviour of Boron Isotopes During Magmatic Degassing and Application to B-Rich Volcanic Glassfrom Lesbos, Greece

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Konstantinos Thomaidis; [2017]
    Nyckelord :boron isotopes; volcanic glass; SIMS; magmatic degassing; Lesbos Island; borisotoper; vulkaniskt glas; SIMS; magmatisk avgasning; Lesbos;

    Sammanfattning : Boron is a fluid mobile trace element and is routinely employed as a tracer of slab-derived fluids in subduction zones since the heavy isotope (11B) preferentially partitions into the fluid phase during slab dehydration. However, it has been shown experimentally that boron isotopes (expressed as δ11B) can fractionate by up to several permil (‰) during subsequent magmatic evolution and degassing at high temperature, calling into doubt the fidelity of boron isotopes in volcanic glass as accurate tracers of slab degassing. LÄS MER

  4. 3. Relationship Between Hekla’s Magmatic System and Its Eruptive Behavior

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Eric Andin; [2017]
    Nyckelord :Hekla; crystal mush; thermobarometry; magma storage depth; Hekla; kristallansamling; termobarometri; magmalagringsdjup;

    Sammanfattning : The southern part of Iceland incorporates two parallel volcanic zones, the Eastern Volcanic Zone and the Western Volcanic Zone. These two branches are connected by an E-W transform. Hekla is located close to intersection between the two plate boundaries. Hekla is one of Iceland's most active and explosive volcanoes. LÄS MER

  5. 4. Constraining Crustal Volatile Release in Magmatic Conduits by Synchrotron X-ray μ-CT

    Master-uppsats, Berggrundsgeologi

    Författare :Sylvia Berg; [2011]
    Nyckelord :xenoliths; crustal gases; synchrotron X-ray μ-CT; 3D-bubble networks; gas migration; magmatic volatile budget; explosive eruption;

    Sammanfattning : Magma-crust interaction in magma reservoirs and conduits is a crucial process during magma evolution and ascent. This interaction is recorded by crustal xenoliths that frequently show partial melting, inflation and disintegration textures. LÄS MER