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Timing and Origin of Igneous Rocks in the Gällivare area, Northern Sweden
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.ORCID iD: 0000-0002-7413-4461
2018 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Luleå: Luleå University of Technology, 2018.
Series
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544
National Category
Natural Sciences Geology
Research subject
Ore Geology
Identifiers
URN: urn:nbn:se:ltu:diva-69186ISBN: 978-91-7790-171-6 (print)ISBN: 978-91-7790-172-3 (electronic)OAI: oai:DiVA.org:ltu-69186DiVA, id: diva2:1215539
Public defence
2018-09-14, C305, Luleå, 10:00 (English)
Opponent
Supervisors
Available from: 2018-06-21 Created: 2018-06-08 Last updated: 2018-06-21Bibliographically approved
List of papers
1. Character and tectonic setting of plutonic rocks in the Gällivare area, northern Norrbotten, Sweden
Open this publication in new window or tab >>Character and tectonic setting of plutonic rocks in the Gällivare area, northern Norrbotten, Sweden
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(English)In: GFF, ISSN 1103-5897, E-ISSN 2000-0863Article in journal (Refereed) Submitted
National Category
Natural Sciences
Research subject
Ore Geology
Identifiers
urn:nbn:se:ltu:diva-69190 (URN)
Available from: 2018-06-08 Created: 2018-06-08 Last updated: 2018-06-20
2. Timing of plutonism in the Gällivare area: mplications for Proterozoic crustal development in the northern Norrbotten ore district, Sweden
Open this publication in new window or tab >>Timing of plutonism in the Gällivare area: mplications for Proterozoic crustal development in the northern Norrbotten ore district, Sweden
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2018 (English)In: Geological Magazine, ISSN 0016-7568, E-ISSN 1469-5081, Vol. 155, no 6, p. 1351-1376Article in journal (Refereed) Published
Abstract [en]

Zircon ion probe (secondary-ion mass spectrometry or SIMS) data from a set of intrusive rocks emplaced in the vicinity of major ore bodies, as well as from large igneous intrusions in the Gällivare area, gave the following results: (1) the Dundret ultramafic–mafic layered complex (1883±5 Ma), the Aitik granite (1883±5 Ma), the Nautanen diorite (1870±12 Ma), the Vassaravaara ultramafic–mafic layered complex (1798±4 Ma), the Aitik dolerite (1813±9 Ma), the Bergmästergruvan and Sikträsk syenites (1795±4 Ma and 1801±3 Ma, respectively) and the Naalojärvi granite (1782±5 Ma). These data broadly fall within the ranges 1.89–1.87 Ga (early Svecofennian) and 1.80–1.78 Ga (late Svecofennian), but geochronologically allow further subdivision into pulses at 1885–1880, 1875–1870, 1800 and 1780 Ma. During these events, large layered ultramafic–mafic and felsic plutonic rocks were generated with distinct overlap in time suggesting coeval felsic–mafic magmatism. Results also indicate the presence of inherited c. 1.87 Ga zircon crystals in the plutonic rocks at 1.78 Ga, supporting reworking of the previous crust. These data indicate the importance of mantle-derived mafic underplating in the process of crustal magma generation in the region. The c. 1.88 Ga event that generated ultramafic–mafic layered complexes is tentatively suggested to have played an important role in the formation of the Aitik Cu–Au porphyry system. The later event at c. 1.80 Ga, generating voluminous mafic–felsic units, is suggested to be coupled to the regional iron-oxide-copper-gold (IOCG) overprint.

Place, publisher, year, edition, pages
Cambridge University Press, 2018
National Category
Geology
Research subject
Ore Geology
Identifiers
urn:nbn:se:ltu:diva-63390 (URN)10.1017/S0016756817000280 (DOI)000439690800008 ()2-s2.0-85018356169 (Scopus ID)
Note

Validerad;2018;Nivå 2;2018-07-26 (inah)

Available from: 2017-05-17 Created: 2017-05-17 Last updated: 2018-08-15Bibliographically approved
3. The Malmberget iron oxide-apatite deposit, Sweden; constraints from geochronology and geochemistry of host rocks
Open this publication in new window or tab >>The Malmberget iron oxide-apatite deposit, Sweden; constraints from geochronology and geochemistry of host rocks
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2018 (English)Manuscript (preprint) (Other academic)
Keywords
Geochronology, Gällivare, Norrbotten
National Category
Natural Sciences
Research subject
Ore Geology
Identifiers
urn:nbn:se:ltu:diva-69188 (URN)
Available from: 2018-06-08 Created: 2018-06-08 Last updated: 2018-06-08
4. Variably old components in mafic-felsic magmas; evidence from north of the Archean-Proterozoic paleoboundary, Gällivare, northernmost Sweden
Open this publication in new window or tab >>Variably old components in mafic-felsic magmas; evidence from north of the Archean-Proterozoic paleoboundary, Gällivare, northernmost Sweden
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(English)Manuscript (preprint) (Other academic)
Keywords
Lu-Hf isotope, Gällivare area, Norrbotten
National Category
Natural Sciences
Research subject
Ore Geology
Identifiers
urn:nbn:se:ltu:diva-69191 (URN)
Available from: 2018-06-08 Created: 2018-06-08 Last updated: 2018-06-08

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