Geology Of The Swamp Creek-triangle Gulch Area Beaverhead County, Montana


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GEOLOGY OF THE SWAMP CREEK - TRIANGLE GULCH AREA BEAVERHEAD COUNTY, MONTANA A Thesis Presented to the Faculty of the Department of Geology Montana School of Mines In Partial Fulfillment of the Requirements for the Degree Master of Science in Geology BUTTE, MUM I ANA ______ 23230 by '^ Paul A. Guttormsen, Jr. June 1952 UBR ARY - MONTANA TSCW BUTTE, k!CHTAMA UMI Number: EP33477 All rights reserved INFORMATION TO ALL USERS The quality of this reproduction is dependent on the quality of the copy submitted. In the unlikely event that the author did not send a complete manuscript and there are missing pages, these will be noted. Also, if material had to be removed, a note will indicate the deletion. JUMT DisseriMi&ri Publishing UMI EP33477 Copyright 2012 by ProQuest LLC. All rights reserved. This edition of the work is protected against unauthorized copying under Title 17, United States Code. ProQuest LLC. 789 East Eisenhower Parkway P.O. Box 1346 Ann Arbor, Ml 48106-1346 TABLE OF CONTENTS PAGE ABSTRACT 1 INTRODUCTION 2 Location and accessibility . • . . # 2 Purpose of investigation 3 Method of investigation 4 Acknowledgments . . • . • CLIMATE AND VEGETATION 6 7 PHYSIOGRAPHY 10 Physiographic history 10 Relief and elevations 14 Drainage • GEOLOGIC HISTORY • • . • 21 DESCRIPTION OF SEDIMENTARY ROCKS 30 Pre-Cambrian 30 Belt series • 32 Cambrian . . . Hasmark formation • • • • • • • • • • Red Lion formation Devonian Jefferson formation Three Forks s h a l e 36 37 42 . . . . . . . . . 45 . . . « * . . 45 • • • • • . • • • • * Mississippian Madison group 16 48 49 • » » * » , . . » « . Big Snowy group undifferentiated 0 49 51 PAGE Mississippian-Pennsylvanian 54 Amsden formation Pennsylvanian 54 # . 55 Quadrant formation 55 UNCONSOLIDATED SEDIMENTS 57 Tertiary . • • . 57 High-level gravel Terrace deposits . . . • . Lacustrine deposits t 58 59 Quaternary • 59 Moraine Recent alluvium and talus 57 # 59 . • • 60 IGNEOUS ROCKS 60 STRUCTURAL GEOLOGY 65 ECONOMIC GEOLOGY 71 SUMMARY AND CONCLUSIONS 78 BIBLIOGRAPHY 82 iii LIST OF TABLES TABLE I. PAGE Patented Claims and Numbered Lots, Swamp Creek-Triangle Gulch Area II. Silver, Gold, Copper, and Lead Production, Vipond Mining District, 1939-1948 III. 75 76 Production in the Vipond District, Beaverhead County, Montana, Production (Gross Metal Content) 1949-1950 77 LIST OF FIGURES FIGURE 1. PAGE Index Map of Southwestern Montana Showing the Location of the Swamp Creek-Triangle Gulch Area . . . 2 2. Detailed Location Map of the Swamp Creek-Triangle Gulch Area . . . . 2 3« Radial Drainage Pattern of the Pioneer Mountains . 16 !+• Stratigraphic Section Swamp CreekTriangle Gulch Area, Beaverhead County, Montana 5. Sketch Map of Quartz Hill Showing Principal Ore Bodies 6. 30 77 Ore Occurrence - Quartz Hill Mining District 77 LIST OF PLATES PLATE I.<
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