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

Bulletin of the Geological Society of Denmark

Rees, J.:¹ 

[1] An Early Cretaceous scincomorph lizard dentary from Bornholm, Denmark. Bulletin of the Geological Society of Denmark, Vol. 47, pp. 105–109. Copenhagen.

关键词: Lizard;    dentary;    Scincomorpha;    Early Cretaceous;    Bornholm;    Denmark.;   

学科分类：地球科学(综合)

来源: Dansk Geologisk Forening

【 摘 要 】

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.

【 授权许可】

Unknown