A Precambrian age for an early gabbro-monzonitic intrusive on the Oksfjord Peninsula, Seiland igneous province, Northern Norway

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Authors:Krogh, E. J.; Elvevold, S.
Author Affiliations:Primary:
Univ. Tromso, Inst. Biol. Geol., Tromso 9000, Norway
Volume Title:Norsk Geologisk Tidsskrift
Source:Norsk Geologisk Tidsskrift, 70(4), p.267-273. Publisher: Universitetsforlaget, Oslo, Norway. ISSN: 0029-196X
Publication Date:1990
Note:In English. 26 refs.; illus. incl. 2 tables, anal.
Summary:Seven out of nine samples of metagabbro and monzonite from the Oksfjord peninsula, West Finnmark, give a Rb-Sr age of 829 +- 18 m.y. This age is interpreted as the age ofintrusion, the source being a depleted mantle reservoir. These results, together with other recent and previous radiometric dates from the area, imply that the period of magmatic activity in the Seiland igneous province lasted for at least 300 m.y. [G.R.]
Subjects:Absolute age; Alkaline earth metals; Chemical composition; Dates; Gabbros; Geochronology; Igneous rocks; Intrusions; Isotopes; Metals; Monzonites; P-T conditions; Plutonic rocks; Precambrian; Rb/Sr; Sr-87/Sr-86; Stable isotopes; Strontium; Europe; Northern Norway; Norway; Scandinavia; Western Europe; Oksfjord Peninsula; Seiland igneous province
Abstract Numbers:92M/0007
Record ID:1992064041
Copyright Information:GeoRef, Copyright 2020 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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