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

Adrian A. Finch; Joakim Mansfeld; T. O M Andersen

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

Adrian A. Finch, Joakim Mansfeld, T. O M Andersen

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Pages (from-to)	1-7
Number of pages	7
Journal	Bulletin of the Geological Society of Denmark
Volume	48
Issue number	1
Publication status	Published - 2001

Keywords

Alkaline rocks
Cathodoluminescence
Gardar province
Mid-proterozoic
Nunarsuit complex
Zircons

Cite this

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abstract = "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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AU - Andersen, T. O M

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N2 - 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.

AB - 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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KW - Cathodoluminescence

KW - Gardar province

KW - Mid-proterozoic

KW - Nunarsuit complex

KW - Zircons

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ER -

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

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Keywords

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