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Geochemical patterns in Norwegian greenstones

Gale, G. H. and Pearce, Julian A. 1982. Geochemical patterns in Norwegian greenstones. Canadian Journal of Earth Sciences 19 (3) , pp. 385-397. 10.1139/e82-031

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Representative samples of Caledonian greenstones from the Grong, Joma, Løkken, Støren, Stavenes, and Bømlo areas in central and southern Norway have been analysed for major elements and over 20 trace elements. Ocean-floor tholeiite-normalized trace-element patterns and chondrite-normalized rare-earth patterns both provide clues to the genesis, original tectonic setting, petrologic character, and effects of alteration of these greenstones. We conclude that the Støren, Stavenes, and Løkken greenstones were generated at spreading axes within the Caledonian ocean, the Grong and possibly the Bømlo submarine greenstones were erupted in an island-arc system, and the Joma and Bømlo subaerial greenstones were erupted in a within-plate setting. The Løkken greenstones may have been generated in a marginal basin, whereas those from Støren and Stavenes were probably generated at a rapidly spreading axis in a major ocean.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Earth and Ocean Sciences
Subjects: Q Science > QE Geology
ISSN: 0008-4077
Last Modified: 04 Jun 2017 02:05

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