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Geochronology and g...
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Bjärnborg, KarolinaLund University,Lunds universitet,Berggrundsgeologi,Geologiska institutionen,Naturvetenskapliga fakulteten,Lithosphere and Biosphere Science,Department of Geology,Faculty of Science
(författare)
Geochronology and geochemical evidence for a magmatic arc setting for the Ni-Cu mineralised 1.79Ga Kleva gabbro-diorite intrusive complex, southeast Sweden
- Artikel/kapitelEngelska2015
Förlag, utgivningsår, omfång ...
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2015-03-17
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Informa UK Limited,2015
Nummerbeteckningar
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LIBRIS-ID:oai:lup.lub.lu.se:5dfe7b00-5332-4829-8cad-a983b0d5907a
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https://lup.lub.lu.se/record/7410985URI
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https://doi.org/10.1080/11035897.2015.1015265DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:art swepub-publicationtype
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Magmatic Ni-Cu sulphide deposits are commonly associated with mafic rocks within the marginal areas of Archean or Proterozoic cratons. The Kleva Ni-Cu sulphide deposit in southeast Sweden is hosted by gabbro-diorite rocks and is sandwiched between two Palaeoproterozoic magmatic arcs: the Transscandinavian Igneous Belt (TIB) and the Oskarshamn-Jonkoping Belt (OJB). Major and trace element data corroborate an arc origin for the Kleva intrusive complex. The variety of rocks and geochemical signatures suggest that it formed from several magmatic pulses. Despite the occurrence of supracrustal xenoliths, there is a lack of trace element evidence for significant assimilation. Mafic intrusions are abundant in southeast Sweden and are generally inferred to be synchronous with the TIB. Of these, Kleva is the only known Ni-Cu deposit, and it is unclear if it is associated with the OJB or TIB. Here, we present zircon and baddeleyite U-Pb dates of 1788 +/- 4Ma, 1788 +/- 5Ma and 1792 +/- 3Ma. We interpret a 1790Ma date to be the best estimate of the crystallisation age of the Kleva intrusive complex, indicating that the emplacement of mafic magma is coeval with the voluminous arc-related TIB magmatism in the area.
Ämnesord och genrebeteckningar
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Scherstén, AndersLund University,Lunds universitet,Berggrundsgeologi,Geologiska institutionen,Naturvetenskapliga fakulteten,Lithosphere and Biosphere Science,Department of Geology,Faculty of Science(Swepub:lu)geol-aes
(författare)
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Söderlund, UlfLund University,Lunds universitet,Berggrundsgeologi,Geologiska institutionen,Naturvetenskapliga fakulteten,Lithosphere and Biosphere Science,Department of Geology,Faculty of Science(Swepub:lu)geol-uso
(författare)
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Maier, Wolfgang D.
(författare)
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BerggrundsgeologiGeologiska institutionen
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:GFF: Informa UK Limited137:2, s. 83-1012000-08631103-5897
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