Search for dissertations about: "volcanology"

Found 2 swedish dissertations containing the word volcanology.

  1. 1. Volcanism at the tip of a propagating rift : the Heimaey volcanic centre, south Iceland

    Author : Hannes B. Mattsson; Armann Höskuldsson; Alasdair Skelton; Sigurdur Steinthorsson; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; Geology; Volcanology; Petrology; Heimaey; Vestmannaeyjar; Propagating rift; Phreatomagmatic; Diatreme; Tumuli; Earth sciences; Geovetenskap;

    Abstract : Primary magmas are generated by 4-6% partial melting near the garnet-spinel stability fields beneath Heimaey (i.e. 80-65 km depth). The magmas fractionate 31% olivine and clinopyroxene en-route to ponding at the base of the crust (and forming a parental Vestmannaeyjar magma). READ MORE

  2. 2. Volcanology of the paleoproterozoic Maurliden area and its four unusual massive sulphide deposits, Skellefteå district, Sweden

    Author : Cecilia Montelius; Luleå tekniska universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Malmgeologi; Ore Geology;

    Abstract : The Skellefte district is one of three major ore provinces in Sweden and contains more than 85 Zn-Cu-Au-Ag massive sulphide deposits. The Maurliden area is situated in the central part of the district and is a subaqueous volcanic dominated area with four Zn-Pb-Cu-Au-Ag sulphide deposits. READ MORE