Skip to Main Content
Book Chapter

Petrogenesis of prismatine-bearing metapelitic gneisses along the Moose River, west-central Adirondacks, New York

By
Robert S. Darling
Robert S. Darling
1
Department of Geology, State University of New York—College at Cortland, Cortland, New York 13045, USA
Search for other works by this author on:
Frank P. Florence
Frank P. Florence
2
Science Division, Jefferson Community College, Watertown, New York 13601, USA
Search for other works by this author on:
Gregory W. Lester
Gregory W. Lester
3
Department of Earth and Environmental Sciences, Rensselaer Polytechnic Institute, Troy, New York 12180, USA
Search for other works by this author on:
Philip R. Whitney
Philip R. Whitney
4
New York State Geological Survey, New York State Museum, Albany, New York 12230, USA
Search for other works by this author on:
Published:
January 01, 2004

Metapelitic gneisses exposed along the Moose River in the west-central Adirondack Highlands contain uncommon Mg- and B-rich mineral assemblages. Phases identified in these rocks include cordierite, garnet, sillimanite, spinel, orthopyroxene, tourmaline, and locally prismatine, the B-rich end-member of the kornerupine group. Four distinct mineral assemblages are identified, two of which are interpreted to form by partial melting. Prismatine is interpreted to have formed by the melting of tourmaline + biotite + cordierite + sillimanite. Thermobarometry calculations from net transfer and exchange equilibria record temperatures and pressures of 850 ± 20 °C and 6.6 ± 0.6 kilobars for orthopyroxene + garnet assemblages and 675 ± 50 °C and 5.0 ± 0.6 kilobars for cordierite + garnet + sillimanite + quartz assemblages. Mineral textures and compositions are consistent with formation along a nearly isobaric cooling path similar to that proposed by Spear and Markussen (1997).

You do not currently have access to this article.

Figures & Tables

Contents

GSA Memoirs

Proterozoic Tectonic Evolution of the Grenville Orogen in North America

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:
January 01, 2004

GeoRef

References

Related

Citing Books via

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal