Skip to Main Content
Book Chapter

Deformation of the Diana syenite and Carthage-Colton mylonite zone: Implications for timing of Adirondack Lowlands deformation

By
Graham B. Baird
Graham B. Baird
Department of Geology and Geophysics, University of Minnesota, 310 Pillsbury Drive SE, Minneapolis, Minnesota 55455-0219, USA
Search for other works by this author on:
William D. MacDonald
William D. MacDonald
Department of Geological Sciences and Environmental Studies, State University of New York, Vestal Parkway East, Binghamton, New York 13902-6000, USA
Search for other works by this author on:
Published:
January 2004

The Carthage-Colton mylonite zone is a major geothermochronological discontinuity across the northwest Adirondack Mountains of New York, a southern extension of the Grenville Province. A large syenitic gneiss body, the Diana syenite, occurs along most of the southern Carthage-Colton mylonite zone. The present study examined petrofabrics and magnetofabrics of oriented cores and accurately oriented thin- sections to investigate the sources of anisotropy of magnetic susceptibility (AMS) within a central portion of the Diana syenite. Three petrographic foliations, a petrographic lineation, and a magnetic intersection lineation were clearly distinguished. Two of the foliations appear to represent axial planar foliations of the second- and third-phases of regional folding as defined by Wiener (1983). The youngest foliation and the magnetic intersection lineation have not been previously described. This research suggests that folding identified in the Adirondack Lowlands can be traced to at least the southwest margin of the Diana syenite with no obvious discontinuity. Significant implications of this research suggest that: (1) the Adirondack Lowlands deformation likely includes some folding events associated with Ottawan orogen compression, and (2) the kinematics and style of deformation within the Carthage-Colton mylonite zone remain cryptic and cannot conclusively be connected to the fabrics explored in this research.

You do not currently have access to this article.
Don't already have an account? Register

Figures & Tables

Contents

GSA Memoirs

Proterozoic Tectonic Evolution of the Grenville Orogen in North America

Edited by
Richard P. Tollo
Richard P. Tollo
Search for other works by this author on:
James McLelland
James McLelland
Search for other works by this author on:
Louise Corriveau
Louise Corriveau
Search for other works by this author on:
Mervin J. Bartholomew
Mervin J. Bartholomew
Search for other works by this author on:
Geological Society of America
Volume
197
ISBN print:
9780813711973
Publication date:
2004

References

Related

A comprehensive resource of eBooks for resources in the Earth Sciences

This Feature Is Available To Subscribers Only

Sign In or Create an Account

This PDF is available to Subscribers Only

View Article Abstract & Purchase Options

For full access to this pdf, sign in to an existing account, or purchase an annual subscription.

Subscribe Now