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Open Rb-Sr systems due to burial metamorphism and some implications for dating

 

作者: Göran Åberg,  

 

期刊: Geologiska Föreningen i Stockholm Förhandlingar  （Taylor Available online 1985）
卷期: Volume 107, issue 2  

页码: 127-132

 

ISSN:0016-786X

 

年代: 1985

 

DOI:10.1080/11035898509452624

 

出版商: Taylor & Francis Group

 

关键词: Rb-Sr;radiometric age;Rätan granite;Dala granites;Trysil porphyries and granites;low-grade alteration;burial metamorphism;fissure-fillings;Rätan;Los-Hamra;Alvdalen;Trysil;southeastern Norway;N6150 N6225 E1520 E1205

 

数据来源: Taylor

 

摘要:

Rb-Sr whole rock dating of veins and their aureoles from the postorogenic Svecokarelian Rätan granite, central Sweden, yields an isochron age of 1596 ± 21 Ma and an initial87Sr/56Sr ratio of 0.7046 ± 0.0014. A comparison with published data, after recalculation, suggests that the postorogenic magmatic activity was accompanied by block movements and burial metamorphism. There was also a shifting of the magmatic activity from the Rätan area towards southwest over Ålvdalen into Norway.

 

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