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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
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Solid Earth Geology.
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Geophysics.
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2012 (English)In: Polish Polar Research, ISSN 0138-0338, Vol. 33, no 1, 1-17 p.Article in journal (Refereed) Published
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.

Place, publisher, year, edition, pages
2012. Vol. 33, no 1, 1-17 p.
Keyword [en]
Arctic, Svalbard, zircon, monazite, uraninite, geochronology
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:uu:diva-173837DOI: 10.2478/v10183-012-0003-6ISI: 000302521400001OAI: oai:DiVA.org:uu-173837DiVA: diva2:525709
Available from: 2012-05-09 Created: 2012-05-07 Last updated: 2012-12-17Bibliographically approved

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Majka, JaroslawGee, David G.

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