2200 million years of crustal evolution; the Baltic Shield

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Authors:Gaal, G.
Author Affiliations:Primary:
Geol. Surv. Finl., Espoo 02150, Finland
Volume Title:Bulletin of the Geological Society of Finland
Source:Bulletin of the Geological Society of Finland, 58(1), p.149-168. Publisher: Geological Society of Finland, Helsinki, Finland. ISSN: 0367-5211
Publication Date:1986
Note:In English
Summary:Plate tectonic processes generated continental crust since at least the start of the late Archaean cycle 2900 m.y. ago. Ensialic crust older than this existed in the basement of the greenstone belts, forming the nucleus of the east-central part of the Baltic Shield. With the generation of a passive continental margin 2100 m.y. ago a tectonic set-up was created that prevailed into late Proterozoic time. Subsequent juvenile crust was formed by accretion above Circum-Pacific-type subduction zones with eastward dips shifting stepwise westward. [R.A.H.]
Subjects:Archean; Basement; Continental margin; Orogeny; Precambrian; Proterozoic; Tectonics; Upper Precambrian; Europe; Fennoscandian Shield; Scandinavia; Western Europe; Evolution
Abstract Numbers:88M/2677
Record ID:1993007470
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom, Reference includes data from PASCAL, Institute de l'Information Scientifique et Technique
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