Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Zircon U-Pb-Hf isotope data in eclogite and metagabbro from southern Sweden reveal a common long-lived evolution and enriched source
Naturhistoriska riksmuseet, Enheten för geovetenskap.
Naturhistoriska riksmuseet, Enheten för geovetenskap.
2020 (engelsk)Inngår i: GFF, ISSN 1103-5897, E-ISSN 2000-0863, Vol. 142, nr 4, s. 253-266Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Several orogenies have shaped the bedrock of southern Sweden. While mafic intrusions represent significant sources of information for reconstructing geodynamics and crustal evolution, the characterization of the various generations of such intrusions in Sweden remains limited. We reportin situzircon U-Pb ages and Hf isotope data from a Fe-Ti eclogite and a coronitic metagabbro from the Eastern Segment in southern Sweden. Crystallisation ages at 1683 +/- 17 Ma of the eclogite suggest affiliation with the surrounding 1730-1660 Ma Transscandinavian Igneous Belt intrusions that dominate the Eastern Segment. Secondary zircon growth and Pb-loss in the eclogite sample at 1459 +/- 44 Ma and the crystallisation of the metagabbro at 1431 +/- 26 Ma overlap and are related to magmatic activity during the Hallandian orogeny. Zircon Hf isotope signatures with chondritic and sub-chondritic values at similar to 1683 Ma and similar to 1431 Ma, respectively, correspond to an enriched (or mildly depleted) source in line with a "Mixed Svecofennian Crustal Reservoir". These isotope signatures are more enriched than those in the surrounding gneisses. Zircon isotope data from the herein analysed zircon grains indicate that the eclogite and metagabbro had an enriched mafic source in the mid to lower crust, or within the subcontinental lithospheric mantle below Fennoscandia.

sted, utgiver, år, opplag, sider
Taylor & Francis, 2020. Vol. 142, nr 4, s. 253-266
Emneord [en]
Eclogite; zircon; lu-Hf; u-Pb; eastern Segment; hallandian; sveconorwegian KeyWords Plus:SVECONORWEGIAN OROGEN; BALTIC SHIELD; SW SWEDEN; FENNOSCANDIAN SHIELD; LU-HF; SVECOFENNIAN OROGEN; IDEFJORDEN TERRANE; CONTINENTAL-CRUST; EASTERN SEGMENT; ION-MICROPROBE
HSV kategori
Forskningsprogram
Den föränderliga jorden
Identifikatorer
URN: urn:nbn:se:nrm:diva-4056OAI: oai:DiVA.org:nrm-4056DiVA, id: diva2:1510963
Tilgjengelig fra: 2020-12-17 Laget: 2020-12-17 Sist oppdatert: 2020-12-17bibliografisk kontrollert

Open Access i DiVA

Fulltekst mangler i DiVA

Søk i DiVA

Av forfatter/redaktør
Petersson, AndreasTual, Lorraine
Av organisasjonen
I samme tidsskrift
GFF

Søk utenfor DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric

urn-nbn
Totalt: 24 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf