 | | 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...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...diagnosticbarite,quartz (commonlyas bandedjasperoid),minor rhodochrosite, and rare sericiteand clays. Major parageneticdivisionsare' |  | | 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...quartz-sericite-pyrite, base metals, and barite-rhodochrosite-quartz. Adjacent stages show significant overlap |  | | 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...grain margins between tetrahedrite (Tt) and rhodochrosite (Re)................... Chalcopyrite (Cp) along |  | | 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) | | 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 |  | | 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...was seemingly limited to about 450-500 (although mining operations must have removed many); scouring of |  | | 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 |  | 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 |  | | 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 |  | | 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. ______ _________________________ |  | | 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 |  | | Report (volume) | | Minerals of Colorado: A 100- Year Record By EDWIN B. ECKEL GEOLOGICAL SURVEY BULLETIN 1 1 14 A...knowledge____________________________________ Future of Colorado mineralogy______________________________________...mineral localities and metallic mineral deposits of Colorado ________________________________ In pocket III...mineral localities and metallic mineral deposits of Colorado, has not been included in this reprint. Many of...especially Fischer and others, 1946). MINERALS OF COLORADO: A 100-YEAR RECORD By EDWIN B. EcKEL ABSTRACT |  | | 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 |  | | 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 |  | | 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 |  | | Report (issue) | | 789(4) Z = 3 X-ray Powder Pattern: Golden Fleece mine, Colorado, USA. 2.78 (100), 2.96 (80), 5.59 (65)...29.33 21.40 9.94 10.36 100.00 (1) Golden Fleece mine, Colorado, USA. (2) (Pb, Sr)Al3(PO4)(SO4)(OH)6 with...galena, tetrahedrite, rhodochrosite (Golden Fleece mine, USA). Distribution: In the USA, large crystals from...from the Golden Fleece mine, near Lake City, Hinsdale Co., Colorado; in the Mineral Park mine, Mohave...Westerwald area, Germany. Name: For Hinsdale County, Colorado, USA, source of the first specimens. Type Material: |  | | 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....-....--. ...... .......... 182 Golden Fleece vein ...-........-......,..........--......'.............. 188 San Juan Queen mine |  | 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 |  | | Report (issue) | | deposits used in Table 1 may represent a major mine, district name, or local town name or other prominent feature...statements found in the literature for an area or district do not differentiate between mineral abundance...tourmaline, dolomite, other carbontates (e.g., rhodochrosite) and talc. In about 1 percent of the deposits...may represent major mine, group of mines, a mining district, a local town, or a prominent feature adjacent...States, (except Alaska) and in Nova Scotia, it is a county name; in Alaska, area gives the 1 by 3 quadrangle |  | | Journal (issue) | | Marvin Hanner Additions to the Ore Mineralogy of Colorado.................................................by Donald Grybeck Crystallized Minerals of the Colorado Mineral Belt....................................time I saw the famous Bancroft/ W ilber Alma rhodochrosite it snapped my head around from 40 feet away...Lapidary Journal, 27, No. 7, 1040. ITALIAN MOUNTAIN, COLORADO by M. M. Groben Italian M ountain (elevation 13...betw een A spen and Crested Butte in w estern Colorado. Although probably visited by early miners, it |  | | Report (issue) | | COLORADO STATE GEOLOGICAL SURVEY BOULDER R. D. GEORGE, State Geologist BULLETIN 9 GEOLOGY AND ORE DEPOSITS...THE BONANZA DISTRICT SAGUACHE COUNTY COLORADO By HORACE B. PATTON 1915 DENVER,COLORADO EAMES BROTHERS...DOI: https://doi.org/10.58783/cgs.b09.vtso7767 Colorado State Geological Survey. Bulletin No. 9, Plate...rnor of Colorado LIVINGSTON FARRAND ______________________ President University of Colorado HowARD C...TRANS:\IITTAL ST.I.TE GEOLOGICAL SuRVEY, UNIVERSITY OF CoLORADO, December 2, 1916. Governor George A. Carlson |  | | Book | | E ‘ THE ORE DEPOSITS OF THE RICO MOUNTAINS COLORADO B \' FREDERICK LESLIE RANSOME 229 98939 CONTENTS.... . . . . . . . . . . . _ . _ . Future of the district . _ . . . . . . . . _ . . . . . . . . . . . .......................................... . . Golden Fleece or New Year mine .............................Rico-Aspen mine; B, Blanket of the New Year or Golden Fleece mine .........................................Index map showing position of the Rico special district . . . . . . . . . . .. 239 40. Cross section of |
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