首页   按字顺浏览 期刊浏览 卷期浏览 Palaeomagnetism of the dolerites of the Särv Nappe, southern Swedish Caledonides
Palaeomagnetism of the dolerites of the Särv Nappe, southern Swedish Caledonides

 

作者: Göran Bylund,   Olle Zellman,  

 

期刊: Geologiska Föreningen i Stockholm Förhandlingar  (Taylor Available online 1980)
卷期: Volume 102, issue 4  

页码: 393-402

 

ISSN:0016-786X

 

年代: 1980

 

DOI:10.1080/11035898009454496

 

出版商: Taylor & Francis Group

 

关键词: Palaeomagnetism;pole positions;remagnetization;rotation;dykes;tholeiitic dolerite;Särv Nappe;Tossåsfjället Group;Caledonides;Caledonian Orogeny;Proterozoic;Silurian;Devonian;western Jämtland;west central Sweden;N6229 N6321 E1392 E1220

 

数据来源: Taylor

 

摘要:

The dolerites of the main part of the Särv Nappe contain, after progressive alternating field and thermal demagnetization, a stable magnetic component of decl. 21.4°, incl. −9.1°, α25= 12.4°,k= 11.3. This gives a geomagnetic pole at lat. 21°N, long. 170°E which is in agreement with published Silurian-Devonian poles from Fennoscandia. This together with a simple ‘fold test’ implies that the Proterozoic dolerites became remagnetized during the Caledonian orogeny. The magnetic directions from the dolerites in the northern part of the nappe, the Ottfjället block, indicate that this area has rotated ca. 100–110° counterclockwise in relation to the rest of the nappe.

 

点击下载:  PDF (1035KB)



返 回