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A Proterozoic subduction zone in southern Sweden
Luleå tekniska universitet.
1980 (English)In: Earth and Planetary Science Letters, ISSN 0012-821X, E-ISSN 1385-013X, Vol. 46, no 2, p. 287-294Article in journal (Refereed) Published
Abstract [en]

Optical microscopy and chemical analyses for major and trace elements have been performed on 27 Proterozoic metavolcanics from southern Sweden. The metavolcanics and associated metasediments are part of a large arced structure around a vast region with granitic batholiths. The compositional data show that the rocks are altered basalts and andesites and the Si, Ti, Zr and Cr relations demonstrate that almost half of the metabasalts are in accordance with present day arc volcanics and that another large fraction represents ocean floor tholeiites. These relations suggest that major plate tectonic processes occurred already during the Proterozoic in southern Sweden and that during these processes arc volcanics and ocean floor basalts were mixed at a subduction zone.

Place, publisher, year, edition, pages
1980. Vol. 46, no 2, p. 287-294
National Category
Geochemistry
Research subject
Applied Geology
Identifiers
URN: urn:nbn:se:ltu:diva-5869DOI: 10.1016/0012-821X(80)90014-XISI: A1980JE38000014Scopus ID: 2-s2.0-5644228297Local ID: 4107a200-e600-11dc-bcb4-000ea68e967bOAI: oai:DiVA.org:ltu-5869DiVA, id: diva2:978745
Note
Godkänd; 1980; 20080228 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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