Essays about: "magmatic degassing"

Found 4 essays containing the words magmatic degassing.

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

    University essay from Uppsala universitet/Institutionen för geovetenskaper

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

    Abstract : 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. READ MORE

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

    University essay from Uppsala universitet/Institutionen för geovetenskaper

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

    Abstract : 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. READ MORE

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

    University essay from Uppsala universitet/Institutionen för geovetenskaper

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

    Abstract : 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. READ MORE

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

    University essay from Berggrundsgeologi

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

    Abstract : 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. READ MORE