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Geology and ore deposits of the Marble Peak area, Santa Catalina Mountains, Pima County, Arizona Item Type text; Thesis-Reproduction (electronic); maps Authors Braun, Eric Rudolph, 1943- Publisher The University of Arizona. Rights Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author. Download date 03/10/2021 22:52:03 Link to Item http://hdl.handle.net/10150/566331 GEOLOGY AND ORE DEPOSITS OF THE MARBLE PEAK AREA, SANTA CATALINA MOUNTAINS, PIMA COUNTY, ARIZONA by Eric R. Braun A Thesis Submitted to the Faculty of the DEPARTMENT OF GEOLOGY In Partial Fulfillment of the Requirements For the Degree of MASTER OF SCIENCE In the Graduate College THE UNIVERSITY OF ARIZONA 19 6 9 STATEMENT BY AUTHOR This thesis has been submitted in partial fulfillment of re­ quirements for an advanced degree at The University of Arizona and is deposited in the University Library to be made available to borrowers under rules of the Library. Brief quotations from this thesis are allowable without special permission, provided that accurate acknowledgment of source is made. Requests for permission for extended quotation from or reproduction of this manuscript in whole or in part may be granted by the head of the major department or the Dean of the Graduate College when in his judg­ ment the proposed use of the material is in the interests of scholarship. In all other instances, however, permission must be obtained from the author. SIGNED: APPROVAL BY THESIS DIRECTOR This thesis has been approved on the date shown below: JOHN GUILBERT Date ssociate Pr4 ;ssor of Geology ACKNOWLEDGMENTS The author wishes to express sincere appreciation to Dr. J. M. Guilbert who contributed freely in the form of advice and encouragement as thesis director. Appreciation is extended to Professors J. M . Guilbert and B.E. Nordlie who accompanied the author to the study area, and to Professors J. M. Guilbert, S. R. Titley, and B.E. Nordlie who read the manuscript and offered many helpful suggestions. The author wishes to thank The Hanna Mining Company to whom he is indebted for financial assistance and employment during the sum­ mer of 1967 when much of the field work was conducted. Mr. J. J. Eidel, Mr. J. P. Broderick, Dr. J. C . Ruckmick, and Dr. E. L. Ohle, geologists for The Hanna Mining Company, accompanied the author to the study area and provided many useful suggestions. Mr. L. E. Stickradt, agent for the Arizona Copper Mines, Inc., made all geologic data available and provided the author with housing during field study which is gratefully acknowledged. Mr. Roy Bishop, who resides in the study area, offered the author many courtesies. The author is indebted to the N.D.E.A. Title IV fellowship program for financial support for the academic years 1965, 1966, and 1967. Mr. D. B. Sayner, who instructs courses in scientific illustra­ tion at The University of Arizona, offered photographic equipment and advice and encouragement on preparation of illustrations which is grate­ fully acknowledged. Gratitude is also extended to faculty members and iii graduate students of the Department of Geology, The University of Arizona, who are too numerous to mention by name. TABLE OF CONTENTS P age LIST OF ILLUSTRATIONS........................... vii LIST OF TABLES......................................... ix ABSTRACT............................................................................................................... x INTRODUCTION .................................................................................................. 1 Purpose and Scope of S tu d y ................... -* Methods of Study ............................ .... h Definition of Term s ..................................... L o c a t i o n ........................................................ co co Topography and Accessibility .... oj History, Production, and Previous Work cn GEOLOGIC S E T T IN G ........................................................................................ 9 GENERAL GEOLOGY 15 Rocks ........................................................................................................... 15 Precambrian Rocks ................................................................. 15 Precambrian G ranite ................................................... 15 Pioneer F o r m a tio n ........................................................ 17 Dripping Spring Q u a rtz ite .......................................... 17 P aleozoic R o c k s ...................................................................... 18 Bolsa Q uartzite ....................... .... 18 Abrigo Formation............................................................ 18 U ndifferentiated Paleozoic M a r b le ........................ 18 Undifferentiated Paleozoic Q uartzite ................... 20 P o st-P aleozoic R o c k s ................................................... 20 Leatherwood Quartz D iorite ..................................... 20 Lamprophyre ................................................................. 22 A l a s k i t e ..................................................................... 24 Massive Quartz ............................................................. 26 Rhyolite ( ? ) ...................................................................... 26 S t r u c t u r e .................................................................................................. 26 M e tam o rp h ism ........................................................................................ 28 IGNEOUS METAMORPHISM 31 v i e TABLE OF CONTENTS—Continued Page GEOLOGY OF THE LEATHERWOOD MINES AREA........................... 33 Workings . .............................................. 33 Lamprophyre Dikes and Igneous Metamorphism ....................... 38 M ineralization and P a rag e n esis........................................................ 39 GEOLOGY OF THE STRATTON MINE AREA........................... 42 W o r k in g s ................................................................................................. 42 Rock Types and S tructure ........................... 42 Igneous M etamorphism and M in e ra liz a tio n ................................. 43 GEOLOGY OF THE HARTMAN-HOMESTAKE M I N E ................................. 44 W o r k in g s ........................... 44 Rock Types and S t r u c t u r e ................................................................. 44 Igneous M e ta m o rp h is m ...................................................................... 47 M ineralization and Paragene s i s ........................................................ 47 GEOLOGY OF THE DAILY-GEESMAN MINES A REA ................................. 51 W o r k in g s ................................................................................................. 51 Rock Types and S t r u c t u r e ................................................................. 54 Igneous M e ta m o rp h is m ...................................................................... 55 M ineralization and Paragene s i s ........................................................ 59 VERTICAL M A G N ETIC S................................ 62 THEORETICAL CONSIDERATIONS OF IGNEOUS METAMORPHISM AND ORE DEPOSITION..................................... 64 Related Experimental D ata ................................................................. 64 Sedim entary Control of Igneous M e ta m o rp h ism ........................ 65 Pyrometasomatism ......................................... 66 Igneous Metamorphism Related to Faults and Fractures. 67 Paragenetic Sequence .................................................. 68 C O N C L U SIO N S.............................................. 71 RECOMMENDATIONS............................ ............................................. 76 LIST OF REFERENCES........................................................................................ 77 LIST OF ILLUSTRATIONS Figure Page 1. Index Map Showing Location of the Study A re a ................... 4 2. Aerial Photograph of Marble Peak, in the Foreground, Looking North . 16 3. Aerial Photograph of Marble Peak, Looking East, with Bolsa Quartzite Cropping out along Oracle Ridge in the F o reg ro u n d ............................................................................... 16 4. Geologic Map of the Marble Peak Area, Pima County, Arizona ............................................................ in pocket 5. Photomicrographs of Thin Sections of Leatherwood Quartz Diorite and Lam prophyre .............................................. 21 6. Photomicrographs of Thin Sections of Alaskite ............................ 25 7. View of Marble Peak Looking Northeast from the O racle R o a d ............................................................................... 29 8 . Views of the Leatherwood M ines A r e a ...................................... 34 9. Views from an Adit Located on the Brecciated Lamprophyre Dike East of the Leatherwood Mines . 36 10. Geologic Map of Part of the Bishop M ine ................................. 37 11. Photomicrographs of Polished Sections, Polished Thin Sections, and Thin Sections from the Leatherwood Mines Area ............................................................ 40 12. Geologic Map of the Hartman-Home stake Mine Workings . 45 13. Igneous Metamorphism and Mineralization

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