A comparison of the age and composition of the Shelburne dyke, Nova Scotia, and the Messejana dyke, Spain

New 40 Ar/ 39 Ar age determinations on biotite from the Shelburne dyke of Nova Scotia and from the Messejana dyke of Spain are identical at 203 ± 2 Ma. In addition, both dykes have similar chemical compositions and probably represent similar magma sources, petrogenetic processes, and tectonic settin...

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Bibliographic Details
Published in:Canadian Journal of Earth Sciences
Main Authors: Dunn, Andrew M, Reynolds, Peter H, Clarke, D Barrie, Ugidos, Jose M
Format: Article in Journal/Newspaper
Language:English
Published: Canadian Science Publishing 1998
Subjects:
General Earth and Planetary Sciences
North Atlantic
Online Access:http://dx.doi.org/10.1139/e98-058
http://www.nrcresearchpress.com/doi/pdf/10.1139/e98-058
Description
Summary:New 40 Ar/ 39 Ar age determinations on biotite from the Shelburne dyke of Nova Scotia and from the Messejana dyke of Spain are identical at 203 ± 2 Ma. In addition, both dykes have similar chemical compositions and probably represent similar magma sources, petrogenetic processes, and tectonic settings related to an early phase of opening of the North Atlantic Ocean.

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