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Neoproterozoic pegmatite from Skoddefjellet, Wedel Jarlsberg Land, Spitsbergen: Additional evidence for c. 640 Ma tectonothermal event in the Caledonides of Svalbard
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2012 (Engelska)Kapitel i bok, del av antologi (Övrigt vetenskapligt)
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Abstract [en]

Neoproterozoic (c. 640 Ma) amphibolite facies metamorphism and deformation have been shown recently to have affected the Isbjornhamna and Eimfjellet Complex of Wedel Jarlsberg Land in southwestern Spitsbergen. New SHRIMP zircon U-Pb and in situ electron microprobe monazite and uraninite U-Th-total Pb ages are presented here on a pegmatite occurring within the Isbjornhamna metasedimentary rocks. Although the dated zircons are full of inclusions, have high-U contents and are metamict and hence have experienced notable Pb-loss, the new Cryogenian ages are consistent with the age of regional metamorphism of the host metasediments, providing additional evidence for a clear distinction of the Southwestern Province from the other parts of the Svalbard Caledonides.

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2012. Vol. 33:1, s. 1-17, s. 1-17
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SWEDARCTIC
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URN: urn:nbn:se:polar:diva-2544OAI: oai:DiVA.org:polar-2544DiVA, id: diva2:881384
Tillgänglig från: 2015-12-10 Skapad: 2015-12-10 Senast uppdaterad: 2015-12-10

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http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-173837http://dx.doi.org/10.2478/v10183-012-0003-6

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