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Granite intrusions in the Proterozoic supracrustals of the Ellenö area, south-western Sweden

 

作者: Torbjörn Skiöld,  

 

期刊: Geologiska Föreningen i Stockholm Förhandlingar  （Taylor Available online 1980）
卷期: Volume 102, issue 3  

页码: 201-205

 

ISSN:0016-786X

 

年代: 1980

 

DOI:10.1080/11035898009455155

 

出版商: Taylor & Francis Group

 

关键词: U-Pb;Rb-Sr;dates;absolute age;whole rock;zircon;granite intrusions;supracrustals;genesis;Ljungbergen Granite;Bohus Granite;Åmål mega-unit;Proterozoic;Ellenö;metamorphism;southern Dalsland;eastern Bohuslän;south-western Sweden;N5831 N58

 

数据来源: Taylor

 

摘要:

Zircons from a fine-grained granite dyke, penetrating a supracrustal sequence in the Ellenö area, crystallized about 1558 Ma ago, post-dating the supracrustal deposition and the general gneissification of the underlying granitoids. The Rb-Sr systems of the dykes in the area have been disturbed, probably by metasomatic reactions between dykes and country rocks during later metamorphic event(s). The intrusive character of some other medium-grained small granite stocks relative to the supracrustals of the area is not unambiguous, but Rb-Sr data indicate a probable emplacement about 1400 Ma ago.

 

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