Sökning: "Heimaey"

Hittade 1 avhandling innehållade ordet Heimaey.

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

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

   Sammanfattning : 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). LÄS MER