thumbnail

The Dunbar gneiss- granitoid dome: implications for early Proterozoic tectonic evolution of northern Wisconsin ( USA).

Geological Society of America Bulletin
By: , and 

Links

  • The Publications Warehouse does not have links to digital versions of this publication at this time
  • Download citation as: RIS | Dublin Core

Abstract

The Dunbar dome in NE Wisconsin is a critical structural feature in the early Proterozoic Penokean orogen. We interpret the dome as being a large-scale, fold-interference structure resulting from polydeformation modified by diapirism. The Wisconsin magmatic terrane, as represented by the rocks in the Dunbar dome, differs from the epicratonic, early Proterozoic sedimentary-volcanic sequence (Marquette Range Supergroup) in Michigan to the N, in stratigraphy, structure and volume and composition of igneous rocks. We interpret the Wisconsin magmatic terrane as an oceanic-arc complex that was sutured to the N American continent during development of the Penokean orogen. Similar interpretations based on broad regional observations have been proposed previously.-from Authors

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title The Dunbar gneiss- granitoid dome: implications for early Proterozoic tectonic evolution of northern Wisconsin ( USA).
Series title Geological Society of America Bulletin
Volume 96
Issue 9
Year Published 1985
Language English
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Geological Society of America Bulletin
First page 1101
Last page 1112
Google Analytic Metrics Metrics page