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New Rb—Sr Age Data for the Sub-Jotnian Volcanics (Dala Porphyries) in the Los-Hamra Region, Central Sweden

 

作者: Eric Welin,   Thomas Lundqvist,  

 

期刊: Geologiska Föreningen i Stockholm Förhandlingar  （Taylor Available online 1970）
卷期: Volume 92, issue 1  

页码: 35-39

 

ISSN:0016-786X

 

年代: 1970

 

DOI:10.1080/11035897009451913

 

出版商: Taylor & Francis Group

 

数据来源: Taylor

 

摘要:

Three new age determinations using the Rb—Sr whole rock method are presented for the sub-Jotnian Dala porphyries. Together with previously published analyses (Welin et al. 1966 and Priem et al. 1968) an isochron age of 1669 ± 38 m. y. is obtained using a decay constant of 1.39 · 10−11yr−1(Fig. 2).

 

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