Skip to Main Content
Book Chapter

Mafic magmatism in the Belt-Purcell Basin and Wyoming Province of western Laurentia

By
C. Rogers
C. Rogers
Department of Earth Sciences, Carleton University, Ottawa, Ontario K1S 5B6, Canada
Search for other works by this author on:
A. Mackinder
A. Mackinder
Department of Earth Sciences, Carleton University, Ottawa, Ontario K1S 5B6, Canada
Search for other works by this author on:
R.E. Ernst
R.E. Ernst
Department of Earth Sciences, Carleton University, Ottawa, Ontario K1S 5B6, Canada
Search for other works by this author on:
B. Cousens
B. Cousens
Department of Earth Sciences, Carleton University, Ottawa, Ontario K1S 5B6, Canada
Search for other works by this author on:
Published:
September 01, 2016

Proterozoic mafic magmatic rocks exposed along the western side of North America, or western Laurentia, from Kimberley, British Columbia, through to northwestern Wyoming have been previously divided into two large igneous provinces: the ca. 1460 Ma Moyie-Purcell and the ca. 780 Ma Gunbarrel large igneous provinces. New geochemical analysis from this study demonstrates that there are additional intraplate mafic magmatic rocks present. Distinguishable by variable normalized rare earth element patterns combined with differing slopes on a binary Ti versus V plot, there are 17 identifiable geochemical signatures in the 307 whole-rock and trace-element analyses from this study. Only seven of these signatures can be linked to the ca. 1460 Ma Moyie-Purcell large igneous province, and one signature to the 780 Ma Gunbarrel large igneous province. This study has identified two groups of intrusions with distinct geochemical signatures previously linked with the ca. 1460 Ma Moyie-Purcell large igneous province but now recognized to be separate events, a single unique geochemical signature with a U-Pb age correlative with the Moyie-Purcell large igneous province and seven other heretofore unidentified signatures interpreted to belong to additional undated events.

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

Figures & Tables

Contents

GSA Special Papers

Belt Basin: Window to Mesoproterozoic Earth

John S. MacLean
John S. MacLean
Department of Physical Science, Southern Utah University, 351 W. University Boulevard, Cedar City, Utah 84720, USA
Search for other works by this author on:
James W. Sears
James W. Sears
Department of Geosciences, University of Montana, 32 Campus Drive #1296, Missoula, Montana 59812-1296, USA
Search for other works by this author on:
Geological Society of America
Volume
522
ISBN print:
9780813725222
Publication date:
September 01, 2016

References

Related

A comprehensive resource of eBooks for researchers 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