 | | Report (volume) | | 4=78 GEOLOGY AND ORE DEPOSITS NEAR LAKE CITY, COLORADO BY JOHN DUER IRVING AND HOWLAND BANCROFT WASHINGTON........................................ Official mining districts..................................................................................... San Juan Mountains.................................................................................... San Juan tuff............................................volcanic group....'................................... Eureka rhyolite...................................... |  | | Journal (article/letter/editorial) | | MultistageVein Ores of the Lake City District, Western San Juan Mountains,Colorado John,• F. SL^CK U.S. Geological...vein ores of the Lake City district, in the western San Juan Mountains, Colorado,have producedapproximately$12...unzonedgreen or yellowsphalerite(--%0.8 molepercentFeS); galena;chalcopyrite'sparsetetrahedritetennantite; rare...the Ute-Ulay mine, the largest producerof the district, titis assemblagehas been divided into four stages(from...massiverhodochrosite'and Id, late quartz-carbonate-fluorite.On a district-wide scale,the quartz-basemetal assemblage showsa |  | | Report (issue) | | Ore Deposits of the Eureka and Adjoining Districts San Juan Mountains, Colorado By WILBUR S. BURBANK...with the Colorado State Mining Industrial Development Board A study of part of the western San Juan Mountains...Tertiary volcanic rocks_- ___ - ___________________ _ San Juan Formation ________________ -------Silverton Volcanic...___________________ _ Picayune Formation _______ ------ ______ _ Eureka Tuff ___________________________ _ Burns Formation...___________________ _ Cauldron ring-fault belt ________________ _ Eureka graben ________________________ _ Fault systems |  | | Report (issue) | | Pride of America Mine, Lake City, Hinsdale County, Colorado by Richard F. Sanford, Ann M. Kramer, and...PRIDE OF AMERICA MINE, LAKE CITY, HINSDALE COUNTY, COLORADO By Richard F. Sanford, Ann M. Kramer, and...Mine exposes two classic fissure-type veins in the Eureka Tuff and Picayune Megabreccia Members of the Sapinero...Sapinero Mesa Tuff. This small mine in the Galena District principally produced Ag, which occurs in freibergite...of Lake City, Colorado, in Hinsdale County (Fig. 1) and belongs to the Galena District (Irving and Bancroft |  | | Report (issue) | | Veins and Vein Sediments, of the Golden Wonder Mine Lake City, Colorado: an Epithermal Hot Springs Gold-Alunite...Schematic west-east section, Golden Wonder Mine. West-east section, Golden Wonder Mine. Plan view map,...features of copper and iron sulfides in alunite, Galena altered to anglesite, in alunite matrix. Sylvanite...chalcopyrite with alunite. Hot-spring model for the Golden Wonder Mine. Isothermal log fO£-fS2 diagram, 250^C...Minerals in the Golden Wonder Mine 11 GEOLOGY OF THE VEINS AND VEIN SEDIMENTS OF THE GOLDEN WONDER MINE |  | Weiland, Erick F., Lindemann, J.W., Connors, R.A., Meyers, W.T., Johnson, S.A., Heran, W.D. (1981) Geochemical and geostatistical evaluation of American Flats-Silverton planning units, San Juan volcanic province, Colorado. Open-File Report Vol. 1981 (81-599) US Geological Survey doi:10.3133/ofr81599 | Report (issue) | | American FlatsSilverton Planning Units, San Juan Volcanic Province, Colorado by E. F. Weiland, J. W. Lindemann...AMERICAN FLATS-SILVERTON PLANNING UNITS SAN JUAN VOLCANIC PROVINCE, COLORADO Prepared for: United States Bureau...Research Inc. 1626 Cole Blvd., Suite 120 Golden, Colorado 80401 September 26, 1980 BARRINGER RESEARCH...American Flats-Silverton Planning Units in southwest Colorado (fig. 1). Barringer Research Incorporated conducted...located in the western San Juan Mountains, between Silverton and Lake City, Colorado (fig. 1). The study |  | Doe, B. R., Steven, T. A., Delevaux, M. H., Stacey, J. S., Lipman, P. W., Fisher, F. S. (1979) Genesis of ore deposits in the San Juan volcanic field, southwestern Colorado; lead isotope evidence. Economic Geology, 74 (1) 1-26 doi:10.2113/gsecongeo.74.1.1 | Journal (article/letter/editorial) | | Depositsin the SanJuanVolcanicField, Southwestern Colorado LeadIsotopeEvidence B. R. DOE,T. A. STEVEN,M....W. LIPMAN, AND F. S. FISIIER Abstract In the San Juan volcanic area of southwesternColorado,the isotopiccompositionof...other deposits (Summitville, Jasper, Red Mountain district) have values of 2ø•Pb/•ø4Pbsimilar to those of...galenasof the P]atoro caldera complex,of the central San Juan caldera complex,and of the Baughman Creek center...Precambrianbasementunder the San Juan volcanic area. Althoughthe data from the westernSan Juan calderacomplexscatterconsiderably |  | | Report (volume) | | Handles Peak Wilderness Study Areas, Hinsdale County, Colorado U.S. GEOLOGICAL SURVEY BULLETIN 1715-B /fj&:~~:£2...Handles Peak Wilderness Study Areas, Hinsdale County, Colorado By RICHARD F. SANFORD, RICHARD I. CRAUCH,...RESOURCES OF WILDERNESS STUDY AREASSOUTHWESTERN COLORADO DEPARTMENT OF THE INTERIOR DONALD PAUL MODEL...Hinsdale County, Colorado. (Mineral resources of wilderness study areas southwestern Colorado ; ch. B)...mineral resources Colorado Redcloud Peak Wilderness. 2. Mines and mineral resources Colorado Handies Peak |  | | 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) | | GEOLOGICAL SURVEY The Gladiator Mine, Lake City, Colorado: The mineralogy and paragenesis of an epithermal...standards and stratigraphic nomenclature. Denver, Colorado CONTENTS Abstract............................of some of the more prominent mines in Lake Mining district.............................. Generalized geologic...geologic map of the Gladiator Mine Lake City, Colorado........................................ Topographic............ Early generations of stage Ila (S-G) galena surrounded by successive bands of sphalerite (stage |  | | Journal (article/letter/editorial) | | of the more interesting Colorado occurrences include mines of Clear Creek County, particularly in the Georgetown...American Sisters, and Colorado Central mines; elsewhere in Clear Creek County crystals and masses to...other silver minerals in mines of the Rico district, Dolores County, where it has been found as small hexagonal...Eagle County. The famous silver vein system exploited in the Bulldog mine at Creede, Mineral County, produced...silver-lead-zinc producer in the wellknown Elsa–Galena Hill–Keno Hill area. It reportedly produced crystallized |  | Hon, Ken, Ludwig, K. R., Simmons, K. R., Slack, John F., Grauch, R. I. (1985) U-Pb isochron age and Pb isotope systematics of the Golden Fleece vein; implications for the relationship of mineralization to the Lake City Caldera, western San Juan Mountains, Colorado. Economic Geology, 80 (2) 410-417 doi:10.2113/gsecongeo.80.2.410 | Journal (article/letter/editorial) | | Isochron Age and Pb Isotope Systematicsof the Golden Fleece Vein Implications for the Relationshipof Mineralization...Mineralization to the Lake City Caldera, Western San Juan Mountains, Colorado KEN HON, K. R. LUDWIG, K. R. SIMMONS...27.5 + 0.5 m.y. has been determinedfor the Golden Fleece vein, southwesternColorado,which containsan...amongthe most radiogenicvaluesreported from the San Juan Mountainsand suggest that a significant component...mineralassemblages that are distinctly differentfrom the Golden Fleece, and mostof these veins are thoughtto be genetically |  | | Journal (issue) | | Julius Weber Mamaroneck, New York COLORADO ISSUE #2 Articles Colorado locality index.............................. 323 by B. L. Muntyan What’s new in Colorado minerals? ............................................. 339 by M. I. Jacobson The San Juan Mountains of Colorado ..................................349...10 cm tall, from the Yucca Hill claim, Park County, Colorado. Richard A. Kosnar specimen; photo by John...Natural History for conceiving the idea of a second Colorado issue and for helping a great deal in bringing |  | | Journal (issue) | | R. Kampf Natural History Museum of Los Angeles County Arthur Roe Tucson, AZ Abraham Rosenzweig University.................. 239 by C. G. Doll Across the San Juan Mountains ......................................Mineralogical Research Co., 704 Charcot Avenue, San Jose, CA 95131. A list of other dealers in back issues...Czechoslovakia France Germany Japan Italy Mexico Namibia USSR USA Zaire Total Total number of species during 5-year...Cc. The crystals are seated on altered sulfides (galena/ sphalerite) or “psilomelane” and consist of opaque |  | | Report (issue) | | The Triangle of Colorado Mountains of Minerals Contributors David W. Bunk, Robert B. Cook, Don Earnest... Contents PAGE4 PAGE 10 4 The San Juan Triangle of Colorado Ho for the San Juans! by Duane A. Smith, Mark...ocated in southwestern Colorado and covering over 31,000 square kilometers, the San Juans are some of the...not until the last 25 years of the 1800s that the San Juans began revealing the extent of their mineral...In 1896 world-renowned mining engineer Thomas ''T.A." Rickard called the San Juans one of Colorado's |  | | Report (issue) | | Flats Wilderness Study Area, western San Juan Mountains, Colorado* by Ken Hon, Dana J. Bove, and V. J...S. Geological Survey, Federal Center, Denver, Colorado, 80225 STUDIES RELATED TO WILDERNESS Bureau...Ouray and Hinsdale Counties, Colorado. SUMMARY The western San Juan Mountains, including the American...south-central Colorado during Oligocene and Miocene time. The earliest volcanic activity in the western San Juan...the largest of these centers is the Uncompahgre-San Juan caldera complex and the associated Silverton caldera |  | | Journal (article/letter/editorial) | | deposition andemplacement of the host rock, size of the district,temperaturesof mineraldeposition,chemicalcomposition...type(Goldfield,Nevada)andtheadulariasericitetype (Creede,Colorado;RoundMountain,Nevada).Bothtypeshavegold-richand...ivided into Two Types,with SelectedReferences District Selected references Acid-sulfatetype Ransome(1901)...Adularia-sericitetype LakeCity I, CO• Colqui,Peru2 Eureka, COs Creede, CO Irving andBancroft(1911) Slack...ositsis illustrated by thePrideof theWestmine,Colorado,a gold-rich, dominantlyvolcanic-hosted vein systemthat |  | | Journal (issue) | | special group of people. By Bob Jones LAKE CITY, COLORADO 34 Enjoy its mines, minerals and mountains. By...Marion, Kentucky. The BECMM sponsors digs at the old Eureka Prospect mine near Marion, and it routinely produces...remoteness of the source precludes large-scale mining at this time. Smaller deposits are known in China...carvers in the world. He began working for jade mining company Washington Jade, a subsidiary of Bull Trout...MINERAL SHOW Nov. 11th, 12th & 13th, 2016 Jackson County Fairgrounds Pascagoula,MS admission $3.00 or $5 |  | | Report (issue) | | Sulfides likely to be present include pyrite, galena, sphalerite, and arsenopyrite (Berger, 1986). These...deposits used in Table 1 may represent a major mine, district name, or local town name or other prominent feature...veins" in the Meguma Group deposits, Nova Scotia. Galena is listed third by Junner (1921) in the Victoria...and "subordinate" in Nova Scotia (Malcolm, 1912), galena was widely considered by mine operators to be correlated...statements found in the literature for an area or district do not differentiate between mineral abundance |  | | Report (volume) | | Radioactivity in the Metal-Mining Districts of the San Juan Mountains Colorado GEOLOGICAL SURVEY --*_-...Radioactivity in the Metal-Mining Districts of the San Juan Mountains Colorado By C. T. PIERSON, W. F. WEEKS...radioactivity in the metal-mining districts of the San Juan Mountains, Colorado, by C. T. Pierson, W. F...p. 412-413. 1. Radioactivity. 2. Uranium ores San Juan Mountains. i. Title. (Series: U. S. Geological..._______________ CeboUa district..______________________________ Upper Uncompahgre district. ______ _________________________ |  | | Book | | DEPOSIT. ^ jflnzona mining Directory A DIRECTORY OF Arizona^s Mines^ Mining Districts Owners or...or Operators AND POSTOFFICE ADDRESSES (Yavapai County) Copyright RUSSELL H. J 903 MILLWARD PRESCOTT...PRESCOTT, ARIZONA Published by The Arizona Mining Directory Prescott, Arizona Price $2.50 '-^ '...#;^ XXc. No. a. PREFACE Yavapai, the treasure county of Arizona, has developed beyond the speculative...operators than to this county a greater is October 298 1, were 1876, of mining locations Hinton, the |  | | Report (volume) | | REPORT ECONOMIC GEOLOGT 7 SILVERTON QUADRANGLE, COLORADO FREDERICK RANSOME WASHINGTON GOVERNMENT PRINTING...Whitman Cross........................... ........ San Juan volcanic area .......................... .......the volcanic area ......... ...........:..... San Juan formation . ...... ...'......--...-............................./................:. Methods of mining and treatment of ores....-....--. ...... ........168 169 170 170 CONTENTS. '< Page. Lodes of Galena Mountain and vicinity..._..... ._.......--.... |  | Bove, Dana J., Hon, Ken, Budding, Karin E., Slack, John F., Snee, Lawrence W., Yeoman, Ross A. (2001) Geochronology and geology of late Oligocene through Miocene volcanism and mineralization in the western San Juan Mountains, Colorado. Professional Paper 1642. US Geological Survey doi:10.3133/pp1642 | Report (issue) | | Volcanism and Mineralization in the Western San Juan Mountains, Colorado U.S. Geological Survey Professional...Volcanism and Mineralization in the Western San Juan Mountains, Colorado By Dana J. Bove, Ken Hon, Karin E. Budding...volcanism and mineralization in the western San Juan Mountains, Colorado / by Dana J. Bove ... [et al.]. p. cm...3. Geology—San Juan Mountains (Colo. and N.M.). 4. Geology—Colorado. 5. Volcanism—San Juan Mountains (Colo... Figures 1. 2. 3. 4. Map of the San Juan volcanic field, Colorado, showing location of Oligocene calderas |  | | Journal (issue) | | For August, 1935 __ __ ,,. PAe& The Boulder, Colorado, Tungsten Area. By Ronald L. Ives ........ 113........................ 12 3 Lake City Mining District, Colorado. By David Seaman ........... 124 Club...The Boulder, Colorado, Tungsten Area By RONALD L. IVES Since the early days of placer mining mation is pre-Cambrian...pre-Cambrian, with three, in Colorado, those who panned the and possibly four mineralizations, the creeks...remainder FeWO, .... Ferberite hlgh country of Boulder County, Color20-80 % Mn WO., ado, near the town of Nederland |  | | Journal (article/letter/editorial) | | of COLORADO ED RAINES Geology Museum Colorado School of Mines 1310 Maple Street Golden, Colorado 80401...Figure 1. Camp Bird mine, level 2, Sneffels district, Ouray County. Raines-Pettem collection, photographer...photographer unknown. B etween 1868 and 1922, Colorado produced almost 260 million pounds of copper. Nearly 100...from the Leadville district, with another 50 million pounds mined in San Juan County (Henderson 1926).... During the twentieth century, the Gilman district surpassed Leadville in total copper production with |
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