Sökning: "magmatic water content"

Hittade 4 uppsatser innehållade orden magmatic water content.

  1. 1. Magmatic water content and its effect on volcano explosivity; an FTIR investigation on the 2006 and 2010 eruption products of Merapi volcano, Indonesia

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Nadhirah Seraphine; [2018]
    Nyckelord :Merapi volcano; NAMs; clinopyroxene; magmatic water content; FTIR spectroscopy;

    Sammanfattning : One of the most important volatiles in magma is water. In magma, water is incorporated in both the melt and in crystals, including hydrous and nominally anhydrous minerals (NAMs). 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. Volatilernas påverkan på marina vulkanutbrott

    Kandidat-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Laith Khadhem; [2017]
    Nyckelord :Cape Verde; high water depth; eruption; magma; volatiles; vesicles; clinopyroxene; magmatic water content; Kap Verde; högt vattendjup; vulkanutbrott; magma; volatiler; luftbubblor; klinopyroxen; vattenhalt;

    Sammanfattning : The Cape Verde archipelago is located 2000 km east of the Atlantic oceanic ridge and 500 km west of the western part of Africa. The plateau of the archipelago rises on average 2 km above the seafloor, which makes it one of the highest oceanic plateaus on Earth. LÄS MER

  5. 4. Disintegration and Devolatilisation of Sandstone Xenolith in Magmatic Conduits: an Experimental Approach

    Kandidat-uppsats, Berggrundsgeologi

    Författare :Sylvia Berg; [2010]
    Nyckelord :xenolith; melting; bubbles; gas migration; crustal volatiles; magma-crust interaction; magma volatile budget; explosive eruption;

    Sammanfattning : Xenoliths preserve evidence of magma-crust interactions in magmatic reservoirs and conduits. They reveal processes of partial melting of country rock, and disintegration into magma. Widespread evidence for frothy xenoliths in volcanic deposits exists, and these evidently indicate processes of gas liberation, bubble nucleation and bubble growth. LÄS MER