The Solund-Stavfjord ophiolite complex and associated rocks, West Norwegian Caledonides; geology, geochemistry and tectonic environment

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Authors:Furnes, H.; Skjerlie, K. P.; Pedersen, R. B.; Andersen, T. B.; Stillman, C. J.; Suthren, R. J.; Tysseland, M.; Garmann, L. B.
Author Affiliations:Primary:
Geol. Inst., Bergen, Norway
Other:
Inst. Geol., Norway
Trinity Coll., Ireland
Oxford Polytech. Inst., United Kingdom
Volume Title:Geological Magazine
Source:Geological Magazine, 127(3), p.209-224. Publisher: Cambridge University Press, London, United Kingdom. ISSN: 0016-7568
Publication Date:1990
Note:In English. Intl. Lithosphere Project (ILP), Publ. No. 77. 56 refs.; illus. incl. 1 table, sketch maps
Summary:Metabasalts of the Upper Ordovician ophiolite show N- to E-MORB affinity, with high Th/Ta ratios giving evidence of subduction influence. The ophiolite is overlain by a group of heterogeneous sedimentary and volcanic rocks, the Stavenes group. The volcanic rocks consist of metabasalt pillow lavas geochemically like those of the ophiolite, and basic metavolcaniclastics of island arc tholeiite composition. The evidence indicates that the ophiolite and overlying rocks developed in a marginal basin between a continental margin and an active subduction system. Other igneous rocks in the Stavenes group show both calc-alkaline and alkaline affinities indicative of advanced island arc development, and oceanic island build-up, respectively. [C.H.D.]
Subjects:Absolute age; Alteration; Dates; Geochemistry; Igneous rocks; Intrusions; Island arcs; Metabasalt; Metaigneous rocks; Metals; Metamorphic rocks; Metavolcanic rocks; Models; Ophiolite; Ordovician; Paleozoic; Plate tectonics; Plutonic rocks; Rare earths; Subduction zones; Tectonics; Tectonophysics; Trace elements; U/Pb; Ultramafics; Upper Ordovician; Caledonides; Europe; Norway; Scandinavia; Southern Norway; Western Europe; Western Gneiss region; Heggoy Formation; Hersvik Unit; Kalvag Melange; Smelvaer Unit; Solund-Stavfjord Complex; Stavenes Group
Abstract Numbers:90M/4790
Record ID:1990042441
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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