Crustal contaminants in the Permian Oslo Rift, South Norway; constraints from Precambrian geochemistry

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doi: 10.1016/S0024-4937(00)00028-1
Authors:Andersen, Tom; Knudsen, Trine-Lise
Author Affiliations:Primary:
University of Oslo, Laboratory of Isotope Geology, Oslo, Norway
Other:
ARC National Key Centre for Geochemical Evolution and Metallogeny of Continents, Australia
Volume Title:Element partitioning in geochemistry and petrology; special volume in honour of Brenda B. Jensen
Volume Authors:Austrheim, H., editor; Griffin, W. L.
Source:Element partitioning in geochemistry and petrology; special volume in honour of Brenda B. Jensen, edited by H. Austrheim and W. L. Griffin. Lithos (Oslo), 53(3-4), p.247-264. Publisher: Elsevier, Amsterdam, International. ISSN: 0024-4937
Publication Date:2000
Note:In English. Includes appendices. 75 refs.; illus., incl. sects., 3 tables, geol. sketch map
Summary:During the late Paleozoic Oslo rifting event, the SW part of the Baltic Shield was penetrated by mantle-derived magmas from a depleted lithospheric or sublithospheric source. Along the way to their final emplacement, these magmas may have interacted with a heterogeneous continental crust, consisting of a mosaic of continental terranes, each with its unique composition and internal crustal history. Information on radiogenic isotope ratios and trace element distributions in the Precambrian terranes surrounding the rift can be used to define characteristic crustal components. These components may be used as endmembers in petrogenetic modelling of the Oslo Rift magmatic system. Based on available data, six endmember components can be identified, and (semi) quantitatively characterized in terms of Sr, Nd and Pb isotopes and selected trace elements. Data on the distribution of rock-types along the rift flanks allow estimates to be made of the relative importance of the components in different parts of the rift. Combining these data with petrological information may allow a realistic understanding of crust-magma interaction in the Oslo Rift magmatic system. Abstract Copyright (2000) Elsevier, B.V.
Sections:Experimental mineralogy
Subsections:General
Subjects:Continental crust; Crust; Geochemistry; Isotope ratios; Isotopes; Magma contamination; Magmas; Mantle; Models; Paleozoic; Permian; Plate tectonics; Precambrian; Radioactive isotopes; Rifting; Trace elements; Europe; Fennoscandian Shield; Norway; Oslo Graben; Oslo Norway; Scandinavia; Southern Norway; Western Europe
Coordinates:N575000 N610000 E0100000 E0040000
Abstract Numbers:02M/335
Record ID:2000068947
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands
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