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A trondhjemite vein in the Sulitjelma Gabbro, Norway, and its implications for the age of the Sulitjelma Ophiolite

Published online by Cambridge University Press:  01 May 2009

Roger Mason
Roger Mason
Affiliation:
Department of Geology, University College London, Gower Street, London WCIE 6BT
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Summary

The Sulitjelma Gabbro, occurring as a member of the Sulitjelma Ophiolite Complex, and typical of the ophiolite suite in its petrography and geochemistry, is cut by a vein of trondhjemite (plagiogranite). The previous identification of the vein as an offshoot of a continental potassium-rich granite, the Furulund Granite, is wrong. Therefore the Rb-Sr isochron age of 413±34 Ma, obtained from the granite, cannot be taken as the age of intrusion of the Sulitjelma Gabbro.

Type
Articles
Information
Geological Magazine , Volume 118 , Issue 5 , September 1981 , pp. 525 - 531
Copyright
Copyright © Cambridge University Press 1981

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