U-Pb radiometric age of Nunarsuit pegmatite, Greenland:constraints on the timing of Gardar magmatism

A precise U-Pb radiometric age of 1171+/-5 Ma has been obtained from zircons from a pegmatite in the Nunarsuit (previously spelt Nunarssuit) complex, Gardar Province, South Greenland. This age is slightly older than a corresponding Rb-Sr isochron determination. Since Nunarsuit is believed to be amon...

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Bibliographic Details
Main Authors: Finch, A A, Mansfeld, J, Andersen, T
Format: Article in Journal/Newspaper
Language:English
Published: 2001
Subjects:
Nunarsuit complex
Gardar province
Mid-Proterozoic
alkaline rocks
zircons
cathodoluminescence
SOUTH GREENLAND
PROVINCE
ZIRCON
NUNARSSUIT
SYENITES
Greenland
Nunarsuit
Online Access:https://research-portal.st-andrews.ac.uk/en/researchoutput/upb-radiometric-age-of-nunarsuit-pegmatite-greenland(9deb81e0-78dd-4e0b-b5c6-f5266cccd116).html
http://www.scopus.com/inward/record.url?scp=0012327214&partnerID=8YFLogxK
http://2dgf.dk/xpdf/bull48-1-1-7w.pdf
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Summary:A precise U-Pb radiometric age of 1171+/-5 Ma has been obtained from zircons from a pegmatite in the Nunarsuit (previously spelt Nunarssuit) complex, Gardar Province, South Greenland. This age is slightly older than a corresponding Rb-Sr isochron determination. Since Nunarsuit is believed to be among the youngest Gardar centres, this radiometric age date more closely delimits the end of magmatism in the Gardar rift province. A comparison of our data with other published isotopic work may suggest that Gardar magmatism was a continuous rather than a punctuated process.

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