SIMS U-Pb zircon geochronology at the Kuså Ni-Cu deposit, south-central Sweden

The Kuså orthomagmatic Ni-Cu sulphide deposit is situated c. 13 km west of Falun in Bergslagen, south-central Sweden. Ion probe data on zircon from the mafic to ultra-mafic host rocks yield a 207 Pb/ 206 Pb weighted average age of 1798 ± 4 Ma, suggesting a genetic connection to intrusive activity fo...

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Bibliographic Details
Published in:GFF 2017-07, Vol.139 (3), p.233-240
Main Authors: Ripa, Magnus, Kampmann, Tobias C., Hellström, Fredrik A.
Format: Article
Language:English
Subjects:
Bergslagen
Copper
Geochronology
Geochronometry
Geological time
Igneous rocks
Kuså Ni-Cu deposit
Mineralization
Nickel
Radiometric dating
SIMS U-Pb geochronology
Sulfides
Sulphide deposits
Sulphides
Transscandinavian Igneous Belt
Yield
Zircon
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Summary:The Kuså orthomagmatic Ni-Cu sulphide deposit is situated c. 13 km west of Falun in Bergslagen, south-central Sweden. Ion probe data on zircon from the mafic to ultra-mafic host rocks yield a 207 Pb/ 206 Pb weighted average age of 1798 ± 4 Ma, suggesting a genetic connection to intrusive activity forming the Transscandinavian Igneous Belt (TIB-1 phase). TIB-1 ages have recently been reported also for the Kleva deposit of similar type in Southern Sweden. The presence of these two occurrences suggests prospectivity potential for Ni-Cu mineralisation in mafic to ultramafic members of the areally extensive TIB.
ISSN:1103-5897
2000-0863
DOI:10.1080/11035897.2017.1332096