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Crustal reactivation in northern Sweden: the Vettasjärvi granite
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
Scottish Universities Research and Reactor Centre, East Kilbride, Glasgow.
Scottish Universities Research and Reactor Centre, East Kilbride, Glasgow.
Sveriges Geologiska AB, Luleå.
1987 (English)In: Precambrian Research, ISSN 0301-9268, E-ISSN 1872-7433, Vol. 35, no C, p. 277-293Article in journal (Refereed) Published
Abstract [en]

The 1.8 Ga old Vettasjärvi granite belongs to a widespread granite type in northern Sweden and northern Finland. It is a leucocratic, generally massive, pink granite covering a large area but possesses a small vertical extent. Foliated varieties occur and gneissic ghost structures are common. Gradual transitions from biotite-rich gneiss to granite have also been observed. Mineralogy and major and trace element geochemistry demonstrate the minimum-melt character of the Vettasjärvi granite. The low contents of elements such as Nb, Y, Sn and F indicate that it is also undifferentiated. Initial εNd values between −6.2 and −8.2 suggest that the Vettasjärvi granite was generated by crustal anatexis with a major Archaean component as source material. REE contents support this conclusion. Molar proportion ratios Al2O3/Na2O+K2O+CaO lower than 1.1, combined with δ18O values between 8 and 5 suggest that little or no pelitic sedimentary material was involved in the genesis. The Vettasjärvi granite is not a single intrusion, but more likely a zone of remobilisation where granite was generated and gently and irregularly emplaced.

Place, publisher, year, edition, pages
1987. Vol. 35, no C, p. 277-293
National Category
Geochemistry
Research subject
Applied Geology
Identifiers
URN: urn:nbn:se:ltu:diva-10940DOI: 10.1016/0301-9268(87)90059-3ISI: A1987H037900018Scopus ID: 2-s2.0-0023523090Local ID: 9d5251d0-dd33-11db-9cae-000ea68e967bOAI: oai:DiVA.org:ltu-10940DiVA, id: diva2:983888
Note
Godkänd; 1987; 20070328 (pafi)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Öhlander, Björn

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