The Rogaland anorthosites; facts and speculations

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Authors:Duchesne, J. C.; Maquil, R.; Demaiffe, D.
Author Affiliations:Primary:
Univ. Liege, L. A. Geol., Petrol, Geochim., Liege, Belgium
Other:
Free Univ., Earth Sci. Inst., Netherlands
Univ. Libre Brux., L. A. Geol., Petrol., Geochim., Belgium
Volume Title:deep Proterozoic crust in the North Atlantic provinces
Volume Authors:Tobi, Alex C., editor; Touret, Jacques L. R.
Source:NATO Advanced Study Institutes Series. Series C: Mathematical and Physical Sciences, Vol.158, p.449-476; NATO Advanced Study Institute on The deep Proterozoic crust in the North Atlantic provinces, Moi, Norway, July 16-30, 1984, edited by Alex C. Tobi and Jacques L. R. Touret. Publisher: D. Reidel Publishing Company, Dordrecht-Boston, International. ISSN: 0377-2071. ISBN: 90-277-2101-7
Publication Date:1985
Note:In English. 55 refs.; illus. incl. 1 table, sketch map
Summary:The massif-type anorthosites of the province were emplaced as crystal mushes of plagioclase, lubricated by noritic liquids crystallizing along a P-T gradient, and containing aggregates of plagioclase and/or Al-rich orthopyroxene megacrysts, formed in a magma chamber at the base of a thickened crust. Syn-emplacement deformations were produced in the envelope and within the plutons, where they started in the magmatic and ended in the solid stage. The anorthositic suite can be assigned to three magma types: basaltic, jotunitic and charnockitic. Each magma generated part of the suite, with some overlapping. [J.M.H.]
Subjects:Anorthosite; Differentiation; Igneous rocks; Petrology; Plutonic rocks; Precambrian; Proterozoic; Upper Precambrian; Europe; Norway; Rogaland Norway; Scandinavia; Southern Norway; Western Europe; Intrusive rocks; Southwestern Norway
Abstract Numbers:86M/5018
Record ID:1986025889
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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