 | | Report (issue) | | FRAMEWORK AND ENVIRONMENTAL GEOLOGY OF THE SUMMITVILLE, COLORADO ACID-SULFATE MINERAL DEPOSIT By J.E. Gray1...P.O. Box 25046, MS 973, Denver, CO 80225 2 1505 South Meridian, Lovelock, NV 89419 CONTENTS Page INTRODUCTION................ 1 GEOLOGICAL FRAMEWORK OF THE SUMMITVILLE DEPOSIT................... 2 Structure............................... 10 Evolution of the Summitville hydrothermal system............ 11 ENVIRONMENTAL...ILLUSTRATIONS Plate 1. Geologic map of the Summitville open-pit highwall........................... |  | | Report (issue) | | Geology and Ore Deposits ofthe Summitville District San Juan Mountains Colorado By THOMAS A. STEVEN and JAMES...PAPER 343 Prepared in cooperation with the Colorado Metal Mining Fund Board UNITED STATES GOVERNMENT PRINTING...underlying Cropsy Ridge . Quartz latites near South Mountain.... Petrography _______________________ Upper...ridges-__--_---------_----_-.-__---.Lavas underlying North Mountain._______ Lavas capping the ridge east of Park Greek...Greek. Possible upper Fisher dikes on South Mountain. _____-___________-------_--._-_Petrography. __ |  | | Report (issue) | | altered areas within the upper Alamosa River Basin, Colorado by Dana J. Bove1 Open-File Report 94-224 This...imply endorsement by the U.S. Government. Denver, Colorado 1994 CONTENTS Page Abstract. ...............alteration and mineralization ..................... 4 Summitville area. ............................. 5 Iron Creek...mineralized and altered areas in the vicinity of the Summitville Mine is currently being studied to understand...the Jasper area, are essentially undisturbed by mining or exploration activity and will offer unique opportunities |  | | Journal (article/letter/editorial) | | 1994, pp. 1906-1923 GeologyandGeochemistry of Summitville,Colorado'An EpithermalAcid SulfateDepositin a...Geologicstudiesduringrecentopen-pitminingat Summitville,Colorado,haveprovided newinformationonanepitherm...volcanicdomerockandconsists of vuggysilica(central), quartz-alunite,quartz-kaolinite, argillic,andpropylitic(distal)zones...geologicmappingin the openpit, indicatethat vuggysilica,quartz-alunite,andquartz-kaolinite alteredrockconstitutemostof...the Au ore.Vuggysilicaaveraged2.4 ppmAu, quartz-alunite averaged1.2 ppmAu, andquartz-kaolinite averaged0 |  | | Journal (issue) | | Colorado Springs Mineralogical Society Founded in 1936 Lazard Cahn Honorary President Sept 2020 “Pick...Details Inside COLORADO SPRINGS MINERALOGICAL SOCIETY PO BOX 2 COLORADO SPRINGS, COLORADO 80901-0002 Sep...Pete Modreski) SUSPENDED Van Tuyl Lecture Series, Colorado School of Mines, Iron Ores in North America –...on. POSTPONED Symposium on Water and Energy in Colorado, to be held in Ricketson Auditorium, Denver Museum...Museum of Nature and Science. Cosponsored by the Colorado Scientific Society, Denver Museum of Nature & |  | Bethke, Philip M., Rye, Robert O., Stoffregen, Roger E., Vikre, Peter G. (2005) Evolution of the magmatic-hydrothermal acid-sulfate system at Summitville, Colorado: integration of geological, stable-isotope, and fluid-inclusion evidence. Chemical Geology, 215 (1) 281-315 doi:10.1016/j.chemgeo.2004.06.041 | Journal (article/letter/editorial) | | magmatic-hydrothermal acid-sulfate system at Summitville, Colorado: integration of geological, stable-isotope...20192, U.S.A. U.S. Geological Survey, Denver, Colorado 80225, U.S.A. c 305 Swissvale Avenue, Pittsburgh...U.S.A. b Accepted 1 June 2004 Abstract The Summitville Au–Ag–Cu deposit is a classic volcanic dome-hosted...deposit. It occurs in the Quartz Latite of South Mountain, a composite volcanic dome that was emplaced...along the coincident margins of the Platoro and Summitville calderas at 22.5F0.5 Ma, penecontemporaneous |  | | Report (issue) | | ages of volcanic units in the San Juan Mountains, Colorado: Recalculated K-Ar age determinations using...S. Geological Survey, Federal Center, Denver, Colorado 80225 CONTENTS Page Abstract................volcanic stratigraphy of the San Juan Mountains, Colorado.................................3 Table 2.--Recalculated...Tertiary volcanic units of the San Juan Mountains, Colorado..............................4 Appendices Appendix...TERTIARY VOLCANIC STRATIGRAPHY OF SAN JUAN MOUNTAINS, COLORADO (Recalculated ages listed first; old ages listed |  | | Book | | MINES AND MINERALS OF THE GREAT AMERICAN RIFT (COLORADO-NEW MEXICO) Sine —_—< ¢ te om At _SHT 40...MINES AND MINERALS OF THE GREAT AMERICAN RIFT (COLORADO-NEW MEXICO) Richard Walker Holmes and Marrianna...Mines and minerals of the Great American Rift (Colorado-New Mexico). Bibliography: p. Includes index...index. 1. Mines and mineral resources—Colorado. 2. Mines and mineral resources—New Mexico. I. Kennedy, Marrianna...minerals of the Great American Rift in New Mexico and Colorado. Great American Rift is the name we use for a |  | | Report (issue) | | AND MAGMATIC AND HYDROTHERMAL PROCESSES IN THE SUMMITVILLE, CO GOLD DEPOSIT by Robert O. Rye1 , Roger Stoffregen2...ABSTRACT The Summitville gold deposit occurs on the margin of the Platoro-Summitville caldera complex...complex within the South Mountain quartz latite, a hypabyssal stock. Intense acidleaching along fractures...enclosed sequentially by alteration zones of quartz-alunite, quartz-kaolinite, and clay; it hosts later gold...indicate 834Sss = 2±2%o. 534S values of coexisting alunite and pyrite are 18.2 to 24.5%o and -8.1 to -2.2%c |  | | Report (issue) | | Volcanic Rocks, Southeastern SanJuan Mountains, Colorado GEOLOGICAL SURVEY PROFESSIONAL PAPER 852 ...Volcanic Rocks, Southeastern San Juan Mountains, Colorado By PETER W. LIPMAN GEOLOGICAL SURVEY PROFESSIONAL...volcanic rocks, southeastern San Juan Mountains, Colorado. (Geological Survey Professional Paper 852) Includes..................................... . Treasure Mountain Tuff ............................. . Lower tuff...Tuff ................................ . Snowshoe Mountain T~ff ........................ . Interlayered lava |  | | Journal (article/letter/editorial) | | OF MINER.4LIZ.4TION .4S INDIC.4TED BY .4T SUMMITVILLE, K-.4R D.4TING COLOR.4DO, OF .4LUNITE * ...porphyriticlava--thequartzlatite of South many mining districts has been an elusive geo- Mountain. Where leastaltered...of chronologicproblem. Paleontologicand isotopic South Mountainis a light-gray,thoroughlydevitrideterminations...quartzlatitetypicallycontains 20-30 percentphenoas alunite, adularia, and coarsesericite, but in most crysts...of SouthMountainis especially ever, a study on alunite (Silberman and Ashley, coarsely porphyritic over |  | | Journal (article/letter/editorial) | | Acid-SulfateAlterationandAu-Cu-Ag Mineralization at Summitville, Colorado ROGER STOFFREGEN* Departmentof Geologyand...California,Berkeley,California94720 Abstract The Summitville Au-Cu-Agdepositoccurswithina porphyriticquartzlatite...enclosedby quartz-kaolinitealterationwith little or no alunite. Sulfidemineralization occursprimarilywithinthe...that crosscuts the vuggysilica. Consideration of alunite,kaolinitc,andpyritestabilityrelationsandof aluminumspeciation...Ohmoto, 1977), the Lake City district(Slack,1980), andthe Creede district,which hasbeen the subjectof |  | | Report (volume) | | Potential and Geology of the San Juan National Forest, Colorado Edited by Richard E. Van Loenen and Anthony B...potential and geology of the San Juan National Forest, Colorado I edited by Richard E. Van Loenen and Anthony...: I 19.3.2127 1. Mines and mineral resources--Colorado-San Juan National Forest. I. Van Loenen, Richard...famous mining districts, such as those at Rico and La Plata, but there is no significant mining being...Foley, and Anthony B. Gibbons Exploration and Mining History ...................................... |  | | Report (issue) | | PREDICTING WATER CONTAMINATION FROM METAL MINES AND MINING WASTES NOTES FROM A WORKSHOP PRESENTED AT THE INTERNATIONAL... Predicting Water Contamination from Metal Mines and Mining Wastes O^ggg^C. Kathleen S. Smith, Ph.D. Geoffrey... Predicting Water Contamination from Metal Mines and Mining Wastes FOREWORD This report contains copies of...site prior to mining. 11 Predicting Water Contamination from Metal Mines and Mining Wastes Kathleen...Geochemistry Denver Federal Center, M.S. 973 Denver, Colorado USA 80225-0046 Smith (303) 236-5788 Plumlee (303) |  | | Report (issue) | | Series 30 Bibliography and Index of Colorado Geology, 1984-1989 Colorado Geological Survey Department of...Resources Denver, Colorado 1990 Information Series 30 Bibliography and Index of Colorado Geology, 1984-1989...Institute under contract to the Colorado Geological Survey Colorado Geological Survey Department of...of Natural Resources Denver, Colorado 1990 ii FOREWORD In recognition of the need to more effectively...published literature on the state's geology, the Colorado Geological Survey is pleased to release Information |  | | Report (volume) | | Director Published in the Central Region, Denver, Colorado Manuscript approved for publication June 17,1994...the Terrill Mountains Area, Holy Cross District, Churchill County, Nevada By Stephen G. Peters, Richard...of Hydrothermal Fluids and the Origin of Quartz-Alunite-Gold Deposits By George V. Albino................epithermal mineralization in the Holy Cross mining district. This work permits an evaluation of the mineral...are compiled from numerous mineral deposits and mining districts and assembled into models that serve |  | | Report (issue) | | Nelson, Mineral Consultant, 695 South Ogden Street, Denver, Colorado 80209, U.S.A. Harold F. Bonham,...Nevada 89557-0088, U.S.A. Eiji Izawa, Department of Mining, Faculty of Engineering, Kyushu University 36,...Inv. privado Rio Tinto Minera S.A., 72 p. Ashley, R. P., 1974, Goldfield mining district, jLn Guidebook...metals in silicified rocks of the Goldfield mining district, Nevada: U.S. Geological Survey Professional...Paul, 1945, Quicksilver deposits of the Knoxville district, Napa, Yolo, and Lake Counties, California: California |  | | Report (issue) | | Geology and development of the Hishikari mine: Mining Geology, v. 36 (2), no. 196, p. 117. Adams, S....46, p. 9-24. Ashley, R. P., 1974, Goldfield mining district, in Guidebook to the geology of four Tertiary...metals in silicified rocks of the Goldfield mining district, Nevada: U.S. Geological Survey Professional...Paul, 1945, Quicksilver deposits of the Knoxville district, Napa, Yolo, and Lake Counties, California: California...silica rhyolites of the Coso Volcanic Field, Inyo County, California: Journal of Geophysical Research, v |  | | Report (issue) | | OF PRE-MINING GEOCHEMICAL BASELINES AT THREE STREAM JUNCTIONS IN THE VICINITY OF SUMMITVILLE, COLORADO...Deposits to Summitville..................6 Calculation of Geochemical Baselines Prior to Mining............I_.TJ S TiRA/T X ON S Figure 1. Map showing Summitville and location of altered rocks in the upper Alamosa...analyses of stream waters from Calico Peak area, Colorado............................................11...stream waters with pH<5, from Redcloud Peak area, Colorado..............................13 Table 5. Chemical |  | | Report (issue) | | volcanic series as seen down the valley of the Rio Grande from north of Weminuche meadows, San Cristobal...Petrology of the San Juan Region Southwestern Colorado By ESPER S. LARSEN, JR., and WHITMAN CROSS GEOLOGICAL...an area of I2fiOO square miles in southwestern Colorado UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON...assisted by W. H. Emmons and L. H. Woolsley. Engineer Mountain 1907-09 Whitman Cross, assisted by (folio 171)...was found to be applicable to a large area to the south and west. As work progressed into the central volcanic |  | | Journal (article/letter/editorial) | | 401 COMMUNICATIONS K-Ar Analytical Data for Summitville Samples '[Constants: K40x•=0.584 xlO-10/yr....Quartz latite of South Mountain 70L-134 Biotite Sanidine 2 Altered rock 71L-49 Alunite• 8.52 9.93 ...72 22.3+ 0.5 Alunite • 2.49 54 3 Rhyolite of Ds29c Sanidine ...... Cropsy Mountain Age(m.y.) 22...provided by the age of the rhyolite of Cropsy Mountain (Steven et al., 1967); this unalteredlava flow...alteredquartz latite of South Mountain un- conformably.A sampleof the rhyoliteof Cropsy Mountain, collectednear |  | | Report (volume) | | ............................................. Colorado........................................................................................ 102 District of Columbia ............................................. South Carolina......................................:.................... South Dakota.......to refer to Geological Survey Bulletin 507, "The mining districts of the western United States," and to...abundant it may have been completely exhausted by mining or quarrying. Deposits of minerals that are widely |  | | Journal (article/letter/editorial) | | 200fi-2014 ENVIRONMENTAL GEOLOGY OF THE SUMMITVILLE MINE, COLORADO JOH• E. GI•A¾, U.S.Geological Survey...Departmentof Geological Sciences, University of Colorado,Boulder,Colorado80302 Introduction The Summitvillemine...Summitvillemine, located about 10 km north- westof Platoro,Colorado,in the southernSanJuan Mountains(Fig. 1), hasrecently...asa resultof environmental problems related to mining activities.SummitvilleConsolidatedMining Company...GalacticResources of Canada,operatedan openpit goldmine at Summitville(Fig. 2) duringthe period from 1985 to 1992. |  | | Report (issue) | | SECONDARY MINERALOGY OF ALTERED ROCKS, SUMMITVILLE MINE, COLORADO by Marta J.K. Flohr 1 , Roberta G....Figure 1. 2. 3A. 3B. 4. Simplified map of the Summitville mine site .................... Encrustation of...mineral on chalcocite ...... Hinsdalite after alunite in chalcocite-rich rock ................... Zoned...of minerals identified in this study from the Summitville site ..........................................Summary of minerals identified in samples from the Summitville site ... 21 APPENDIX Appendix A. Sample descriptions |  | | Report (volume) | | Rm G-84 DENVER, Colorado--Federal Bldg., Rm. 169, 1961 Stout St. LAKEWOOD, Colorado-- Federal Center...SALT LAKE CITY, Utah--Federal Bldg., Rm. 8105,125 South State St. SAN FRANCISCO, California--Customhouse...quartz-alunite Au, by Byron R. Berger 155 158 Grade and tonnage model of epithermal quartz-alunite Au...rock types 133 Cross section through the Kalavos district Cyprus showing relationship of massive sulfide...epithermal quartz-alunite vein deposits 160 Gold grades of epithermal quartz-alunite vein deposits 160 |
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