Skip to Main Content
Book Chapter

Pre-Alpine terranes and tectonic zoning in the eastern Alps

By
Wolfgang Frisch
Wolfgang Frisch
Search for other works by this author on:
Franz Neubauer
Franz Neubauer
Search for other works by this author on:
Published:
January 01, 1989

Terranes of different geotectonic settings accreted during Paleozoic time to form a consolidated crust by the end of the Variscan orogenic cycle. An ensimatic island arc, which rested upon back-arc oceanic crust and is now preserved in the Penninic unit of the Tauern window, was active in early Paleozoic time. Accretion of ensialic magmatic arcs and (back-arc?) oceanic crust occurred in Ordovician time to form a composite terrane in the Austroalpine unit. Limited radiometric information from zircon provides evidence for the existence of Precambrian cores. An ocean is inferred to have closed by about the early Carboniferous period, thus forming an important ophiolitic suture. Accretion of oceanic terranes and dispersion of the active continental margin by inferred large-scale wrench faulting accompanied this process.

You do not currently have access to this article.

Figures & Tables

Contents

GSA Special Papers

Terranes in the Circum-Atlantic Paleozoic Orogens

R. D. Dallmeyer
R. D. Dallmeyer
Search for other works by this author on:
Geological Society of America
Volume
230
ISBN print:
9780813722306
Publication date:
January 01, 1989

References

Related

Citing Books via

Related Book Content
Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal