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  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Petrologia wybranych skał magmowych Islandii w ujęciu tektoniki kier
    (Data obrony: 2011-12-13) Jarosińska, Krystyna
    Wydział Geologii, Geofizyki i Ochrony Środowiska
    The geology of Iceland results from the location in the rift zone and, possibly, deeper rooted hot spot. Therefore, the island is raised above the surface of the ocean and behaves like a microcontinent. Geochemical and petrological interpretation based on literature data allowed to conclude that Icelandic basalts belong to three magma series: tholeiitic, alkali and transitional alkaline. This diversity is attributed to partial melting of depleted upper mantle, enriched mantle plume and recycled oceanic crust. Silicic volcanism is characteristic for central volcanoes. Source of acidic and intermediate rocks are located directly under the central volcanoes as intrusive complexes. In these complexes there are hydrothermally modified sediments and the early products of the same volcano. Hence these acidic rocks are thought to be generated from basaltic rocks.