Sökning: "Malmgeologi"

Visar resultat 1 - 5 av 36 avhandlingar innehållade ordet Malmgeologi.

  1. 1. New styles of intrusive related copper-gold deposits in northern Sweden

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Therese Bejgarn; Luleå tekniska universitet.; [2009]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Malmgeologi; Ore Geology;

    Sammanfattning : The Älgträsk Au-deposit is situated in the Jörn Granitoid Complex (JGC) immediately north of the Skellefte VMS district, northern Sweden. The Skellefte VMS district comprise a complex volcanosedimentary sequence, which has been interpreted as the remnant of a Palaeoproterozoic island arc or continental margin arc situated behind a northward dipping subduction zone. LÄS MER

  2. 2. The origin of the Ryllshyttan stratabound Zn-Pb-Ag-(Cu) + magnetite deposit, Garpenberg, Bergslagen, Sweden

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Nils Jansson; Luleå tekniska universitet.; [2009]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Malmgeologi; Ore Geology;

    Sammanfattning : Ryllshyttan is a Palaeoproterozoic lower amphibolite-facies poly-metamorphosed stratabound Zn-Pb-Ag-(Cu) + magnetite deposit. It is located in the Garpenberg inlier of the Bergslagen mining district of southern Sweden and produced ~ 1 Mt sulphide ore and ~ 0.4 Mt magnetite ore from the early 16th century until 1944. LÄS MER

  3. 3. Structural and sedimentological reconstruction of the inverted Vargfors basin a base for 4D-modelling

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Tobias Bauer; Luleå tekniska universitet.; [2010]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ore Geology; Malmgeologi;

    Sammanfattning : The Palaeoproterozoic Skellefte mining district in northern Sweden covers an area of 120 by 30 km and is one of the most important mining districts in Europe, producing mainly Zn, Cu, Pb, As and Au from volcanogenic massive sulfide (VMS) and orogenic gold deposits.Detailed mapping of structures and stratigraphy within the sedimentary Vargfors Group combined with a structural analysis revealed a syn-extensional fault pattern of NW-SE-trending normal faults and associated NE-SW-trending transfer faults, creating the segmented sedimentary Vargfors basin. LÄS MER

  4. 4. The nature of gold in the Aitik Cu-Au deposit implications for mineral processing and mine planning

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Monika Sammelin; Luleå tekniska universitet.; [2011]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Malmgeologi; Ore Geology;

    Sammanfattning : The Aitik mine is a large Cu-Au producer in Europe with an annual production of 28 million tons of ore and a planned expansion of production to 36 million tons of ore until year 2013. Large ongoing investments are done in the mine and a new processing plant is built to manage the capacity increase. LÄS MER

  5. 5. The Älgträsk intrusion-related Au (Cu, Zn) deposit, Skellefte district, northern Sweden : Relationships between ore forming events in the Palaeoproterozoic Jörn intrusive complex

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Therese Bejgarn; Luleå tekniska universitet.; [2012]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Malmgeologi; Ore Geology;

    Sammanfattning : Palaeoproterozoic intrusion hosted and intrusion related deposits such as the Älgträsk Au±Cu±Zn, Åkerberg Au, Älgliden Cu–Ni±Au, and the porphyry style Järvträsk Cu±Mo±Zn, Granberg Cu±Mo and Tallberg Cu–Au±Mo deposits are situated in the northern part of the Skellefte District, northern Sweden. These deposits are all hosted within the oldest unit of the Jörn intrusive complex (JIC). LÄS MER