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

A A  Finch; J  Mansfeld; T  Andersen

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

A A Finch, J Mansfeld, T 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 - Jun 2001

Keywords

Nunarsuit complex
Gardar province
Mid-Proterozoic
alkaline rocks
zircons
cathodoluminescence
SOUTH GREENLAND
PROVINCE
ZIRCON
NUNARSSUIT
SYENITES

Cite this

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

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.",

keywords = "Nunarsuit complex, Gardar province, Mid-Proterozoic, alkaline rocks, zircons, cathodoluminescence, SOUTH GREENLAND, PROVINCE, ZIRCON, NUNARSSUIT, SYENITES",

author = "Finch, {A A} and J Mansfeld and T Andersen",

year = "2001",

month = jun,

language = "English",

volume = "48",

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journal = "Bulletin of the Geological Society of Denmark",

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TY - JOUR

T1 - U-Pb radiometric age of Nunarsuit pegmatite, Greenland

T2 - constraints on the timing of Gardar magmatism

AU - Finch, A A

AU - Mansfeld, J

AU - Andersen, T

PY - 2001/6

Y1 - 2001/6

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.

KW - Nunarsuit complex

KW - Gardar province

KW - Mid-Proterozoic

KW - alkaline rocks

KW - zircons

KW - cathodoluminescence

KW - SOUTH GREENLAND

KW - PROVINCE

KW - ZIRCON

KW - NUNARSSUIT

KW - SYENITES

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UR - http://2dgf.dk/xpdf/bull48-1-1-7w.pdf

M3 - Article

SN - 2245-7070

VL - 48

SP - 1

EP - 7

JO - Bulletin of the Geological Society of Denmark

JF - Bulletin of the Geological Society of Denmark

IS - 1

ER -

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

Abstract

Keywords

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