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INFORMATION TO USERS This manuscript has been reproduced from the microfilm master. UMI films the text directly from the original or copy submitted. Thus, some thesis and dissertation copies are in typewriter fece, while others may be from any type of computer printer. The quality of this reproduction is dependent upon the quality of the copy submitted. Broken or indistinct print, colored or poor quality illustrations and photographs, print bleedthrough, substandard margins, and improper alignment can adversely afreet reproduction. In the unlikely event that the author did not send UMI a complete manuscript and there are missing pages, these will be noted. Also, if unauthorized copyright material had to be removed, a note will indicate the deletion. Oversize materials (e.g., maps, drawings, charts) are reproduced by sectioning the original, beginning at the upper left-hand comer and continuing from left to right in equal sections with small overlaps. Each original is also photographed in one exposure and is included in reduced form at the back of the book. Photographs included in the original manuscript have been reproduced xerographically in this copy. Higher quality 6 ” x 9” black and white photographic prints are available for any photographs or illustrations appearing in this copy for an additional charge. Contact UMI directly to order. UMI A Bell & Howell Infonnation Compaiy 300 North Zeeb Road, Ann Arbor MI 48106-1346 USA 313/761-4700 800/521-0600 UNIVERSITY OF OKLAHOMA GRADUATE COLLEGE PETROLOGY OF THE MOUNT SCOTT GRANITE A Dissertation SUBMITTED TO THE GRADUATE FACULTY in Partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY By Jonathan D arrel Price Norman, Oklahoma 1998 UMI N u m b er: 9 9 1 1 8 7 0 UMI Microform 9911870 Copyright 1999, by UMI Company. All rights reserved. This microform edition is protected against unauthorized copying under Title 17, United States Code. UMI 300 North Zeeb Road Ann Arbor, MI 48103 © Copyright by JONATHAN D. PRICE 1998 All Rights Reserved P et r o l o g y o f th e M o u n t S c o t t G r a n it e A dissertation APPROVED FOR THE SCHOOL OF GEOLOGY & GEOPHYSICS BY A cknowledgments I thank the following sources for their financial support of the research within this dissertation. Funding for this study was provided by the U.S. Geological Survey National Cooperative Mapping Program, grants # 1434-HQ-AG-01547 and #1434-HQ-97-AG-01727 to J. D. Price and M.C. Gilbert; by Eberly Chair Funds available to M. C. Gilbert; and by NSF grant #EAR-9316144 to J. P. Hogan and M. C. Gilbert. Funding for the experimental investigation within Chapter 3 was furnished by NSF grants #EAR-9625517 and #EAR-9618867 to D. London. Additional hinds were provided by the Lance Rufifel Field Studies Fund, the Hugh Hunter Petrology Fund, and the School of Geology and Geophysics, University of Oklahoma. Presentation and interaction with other researchers at professional meetings greatly improved the research in this dissertation. I thank those contributors that made travel to meetings possible. Funding for travel was provided by the Geological Society of America South Central Section, the American Geophysical Union, the University of Oklahoma Graduate Student Senate, Eberly Chair Funds, and the School of Geology and Geophysics, University of Oklahoma. I thank Sam Waldstein and his staff at the Wichita Mountains Wildlife Refuge, for their cooperation. I am also grateful to Glenn Wampler and E. J. Ardon and their staff at the Fort Sill Wildlife Office for their cooperation, assistance, and information. I also thank the landowners within the Wichita Mountains for land access particularly, Jim Snell for the generous access to his property in the Hale Spring Area. I wish to thank Jud Ahem, Benjamin Powell, and Tim Denison for their reviews of Chapter 5. Thanks also go to George Morgan for his review of Chapter 3, and also for iv his assistance with experimental petrology, his skilled operation of the electron microprobe, and his voluminous knowledge of igneous systems. I extend my gratitude to Karen Hogan and Liu Huaibo for thin section preparation. I thank Hans Huckenholz for his help in the field and lab. I thank Kevin Smart for his insights into the structural styles in my field area. I also thank James Payne, Joe Dischinger, and Jon Mollison for their assistance in the lab. I thank David London, Thomas Dewers, Kermeth Taylor, and Lawford Anderson for serving on the dissertation committee. Their reviews, comments, and questions greatly strengthened this work. Additional thanks go to David London for the use of his laboratory, and all of his the assistance with experiments. I also thank Barry Weaver for his comments and questions during the development of this work. Thanks go to John P. Hogan for serving on my committee as deputy advisor, and for his, direction, enthusiasm, insight, encouragement, advice, and friendship during the last five years. I also thank my advisor and committee chair, M. Charles Gilbert for his support, guidance, instruction, counsel and for giving me the opportunity to engage in numerous avenues of investigation. I thank my many friends at the School of Geology and Geophysics, particularly fellow igneous students Aditya Kar and Joey Evensen for their assistance and friendship. I also extend my gratitude to all my friends for their continued support throughout the years. I thank my parents, Darrel and Genevieve Price, for the many sacrifices they made for my education. Finally, I thank my wife Cindy, partly for her proofing the final version of this dissertation, but chiefly for her continuing support, patience, and understanding throughout my endeavors. T a b l e o f C o n t en t s A cknowledgments .............................................................................................. iv T able of C ontents .............................................................................................. vi L ist of T ables ......................................................................................................... x L ist OF I llustrations .......................................................................................... xi C hapter 1. O verview ............................................................................................i Location ..................................................................................................................1 Previous Work ....................................................................................................... 2 Dissertation Research on the Petrology of the Mount Scott Granite ................................................................................................................... 4 Feldspar crystallization ................................................................................. 4 Fluorine in the Mount Scott Granite ............................................................ 6 Mount Scott Granite intrusion as a CCC granite ......................................7 Post-intrusion processes within the Hale Spring Area ..............................9 Field studies in the eastern Wichita Mountains ........................................ 10 Conclusion ............................................................................................................12 Works Cited ..........................................................................................................13 C hapter 2. R apakivi T exture in the M ount Sco tt G ranite , W ichita M ountains , O klahoma ........................18 Introduction ..........................................................................................................18 Geologic setting ................................................................................................... 19 M ethod s ................................................................................................................. 21 Petrography ......................................................................................................... 22 General description .......................................................................................22 Feldspar populations .....................................................................................23 Anorthoclase-N Phenocrvsts ................................................................... 23 Anorthoclase-K Phenocrvsts ................................................................... 24 Piapioclase Rims .......................................................................................24 Plagioclase Grains ..................................................................................... 25 Matrix Alkali Feldspar ............................................................................. 25 Order of crystallization .......................................................................................26 Two feldspar geothermometry ...........................................................................27 Discussion ............................................................................................................. 30 Formation of rapakivi texture in granophyre-poor samples (< 35 % Granophyre) ...................................................................................30 Maema-Mixing .........................................................................................30 Exsolution .................................................................................................31 Decompression .........................................................................................32
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