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Table of Contents - Special Paper 377

Precambrian Geology of the Tobacco Root Mountains, Montana

Edited by John B. Brady, H. Robert Burger, John T. Cheney, and Tekla A. Harms

Preface		v
Overview		v
Dedication		v
Acknowledgments		v
1.	General geology and tectonic setting of the Tobacco Root Mountains H. Robert Burger	1
Geochemistry and Petrology
2.	Geochemistry of quartzofeldspathic gneisses and metamorphic mafic rocks of the Indian Creek and Pony–Middle Mountain Metamorphic Suites, Tobacco Root Mountains, Montana David W. Mogk, H. Robert Burger, Paul A. Mueller, Kimberly D’Arcy, Ann L. Heatherington, Joseph L. Wooden, Reyna L. Abeyta, Jennifer Martin, and Lisa J. Jacob	15
3.	Geology and geochemistry of the Spuhler Peak Metamorphic Suite H. Robert Burger, William H. Peck, Kathleen E. Johnson, Kara A. Tierney, Chris J. Poulsen, Pamela Cady, Josh Lowell, William A. MacFarlane, M. Jennifer Sincock, LeAndra L. Archuleta, Ann Pufall, and M. Jason Cox	47
4.	Precambrian meta-ultramafic rocks from the Tobacco Root Mountains, Montana Kathleen E. Johnson, John B. Brady, William A. MacFarlane, Rebecca B. Thomas, Chris J. Poulsen, and M. Jennifer Sincock	71
5.	General geology and geochemistry of metamorphosed Proterozoic mafic dikes and sills, Tobacco Root Mountains, Montana John B. Brady, Heidi K. Mohlman, Caroline Harris, Sarah K. Carmichael, Lisa J. Jacob, and Wilfredo R. Chaparro	89
6.	Proterozoic metamorphism of the Tobacco Root Mountains, Montana John T. Cheney, John B. Brady, Kara A. Tierney, Kathleen A. DeGraff, Heidi K. Mohlman, Jessica D. Frisch, Christine E. Hatch, Michael L. Steiner, Sarah K. Carmichael, Robin G.M. Fisher, Carrie B. Tuit, Kurt J. Steffen, Pamela Cady, Josh Lowell, LeAndra L. Archuleta, Jillian Hirst, Karl W. Wegmann, and Brian Monteleone	105
Geochronology
7.	40Ar/39Ar ages of metamorphic rocks from the Tobacco Root Mountains region, Montana John B. Brady, Dana N. Kovaric, John T. Cheney, Lisa J. Jacob, and J. Toby King	131
8.	In situ ion microprobe 207Pb/206Pb dating of monazite from Precambrian metamorphic suites, Tobacco Root Mountains, Montana John T. Cheney, A. Alexander G. Webb, Chris D. Coath, and Kevin D. McKeegan	151
9.	Age and evolution of the Precambrian crust of the Tobacco Root Mountains, Montana Paul A. Mueller, H. Robert Burger, Joseph L. Wooden, Ann L. Heatherington, David W. Mogk, and Kimberly D’Arcy	181
Structural Geology and Tectonics
10.	Character and origin of Precambrian fabrics and structures in the Tobacco Root Mountains, Montana Tekla A. Harms, H. Robert Burger, Daniel G. Blednick, Jacob M. Cooper, J. Toby King, David R. Owen, Josh Lowell, M. Jennifer Sincock, Steven R. Kranenburg, Ann Pufall, and Carlos M. Picornell	203
11.	Advances in the geology of the Tobacco Root Mountains, Montana, and their implications for the history of the northern Wyoming province Tekla A. Harms, John B. Brady, H. Robert Burger, and John T. Cheney	227
Index of Keywords		245
Explanatory text to accompany geologic map of southern Tobacco Root Mountains, Madison County, Montana (reprinted) Charles J. Vitaliano, H. Robert Burger III, William S. Cordua, Thomas B. Hanley, David F. Hess, and Forrest K. Root		247