 | | Report (issue) | | Badger Flats) Beryllium Area, Park and Jefferson t:-1 Counties, Colorado g ~ s:p ~ I> li:tl ~ GEOLOGICAL...(or Badger Flats) Beryllium Area, Park and Jefferson Counties, Colorado By C. C. HAWLEY GEOLOGY AND ORE...DEPOSITS OF THE SOUTHERN TARRYALL REGION PARK AND JEFFERSON COUNTIES, COLORADO GEOLOGICAL SURVEY PROFESSIONAL...on their association with the late Precambrian Redskin Granite UNITED STATES GOVERNMENT PRINTING OFFICE...rocks~ ____ ~ _______________________ _ Idaho Springs Formation ___________________ _ Amphibolite and |  | | Report (issue) | | area, Colorado Distribution of Beryllium Tin, and Tungsten in the Lake George area, Colorado By C....------------------------------------Outline of mining history--------------------.- ------------------------Geologic...-------------------~---------------------------Redskin area ----------------------------------------------------~ary...in mineral deposits of the Lake George and Tarryall Springs areas -----------------------------------------------2...BERYLLIUM, TIN, AND TUNGSTEN IN THE LAKE GEORGE AREA, COLORADO By C. C. HAWLEY and W. R. GRIFFITTS Abstract |  | | Journal (article/letter/editorial) | | COLORADO TOPAZ Topaz, Al Si0 (F,OH) is one of Colorado's better known gem minerals. Though Col orado...(PJM), 975 (TCM) Box 25046, Federal Center Denver, Colorado 80225-0046 A ccording to Cross and Hillebrand...discovery of Colorado topaz was made about 1880 by a Mr. Thiebald,* "a prospector of Colorado Springs." Cross...been in the Crystal Park area. The largest fine-quality topaz specimens in Colorado occur in several separate...are also referred to the general discussions of Colorado topaz in Eckel (1961) and Pearl (1963) and to |  | | Journal (article/letter/editorial) | | acro88 the cliff’s of Glen Cove to South Park and the Tarryall Mountains. Researchers have subdivided...northeasterly-trending continentul Figure 2. Geologic map of the Colorado Front Range showing the Precambrian metamorphic...Karistrom 1978; Lanthier 1978). Farther south in Colorado, sediments accumulated in decper-water rocks formed...Survey into “Early, Middle, and Late” Eras. In Colorado we because of the subsequent folding and overthrusting...subduction zone and possibly the creation Era in Colorado and Wyoming of a volcanic island arc. Carpenter |  | | Journal (article/letter/editorial) | | DECEMBER 1980 Redskin Granite- a rare-metal-rich Precambrian pluton, Colorado, USA G. A. DESBOROUGH...Geological Survey, Denver, Colorado, USA SUMMARY. The Precambrian Redskin stock is a highsilica alkalic...Thorite, monazite, and xenotime are sparse, and cassiterite and topaz very rare. The principal residences...ilmenorutile and columbite. The occurrence of cassiterite intergrown with biotite and columbite and the...high contents of Nb and Ta in cassiterite are evidence that cassiterite is also a primary mineral. The |  | | Report (issue) | | Geochemical Maps of Stream Sediments in Central Colorado, from New Mexico to Wyoming Open-File Report... Cover: Overlooking North Fork Lake Creek and Colorado highway 82 east of Independence Pass, with Star... Geochemical Maps of Stream Sediments in Central Colorado, from New Mexico to Wyoming By Robert G. Eppinger...Geochemical maps of stream sediments in central Colorado, from New Mexico to Wyoming: U.S. Geological Survey.................. 1 Geologic Setting of Central Colorado.............................................. |  | | Report (issue) | | Denver, Colorado, USA © 2011 by Lithographie, LLC P.O. Box 11613 • Denver, CO 80211 • USA Phone 1.303...Topaz ALFREDO PETROV & JOHN RAKOVAN 34. Colorful Colorado DAVID W. BUNK 42. Mongolian Topaz: The Gorkhi...hardness-sample box produced for the Bergakademie (Mining Academy) in Freiberg, Germany. This box belonged...and quartz, 5.3 cm tall Sawtooth Mountains, Boise County, Idaho shown under longwave ultraviolet light (left)...Mursinka District, Ural Mountains, Russia; Paprok, Laghman Province, Afghanistan; San Diego County, California |  | | Journal (issue) | | England Richard C. Erd U.S. Geological Survey Menlo Park, CA Donald R. Peacor University of Michigan Ann...Richard W. Thomssen Mineral Expl. Consultants Carson City, NV ( * O Vice President Mary Lynn Michela Secretary-...R. Kampf Natural History Museum of Los Angeles County George Robinson National Museums of Canada Arthur...W. Thomssen L Book sales P.O. Box 1656 Carson City, NV 89702 702-883-2598 Special second class postage...SPECIMENS from the collection of the Geology Museum, Colorado School of Mines. See page 242 for a full description |  | | Report (issue) | | --------Miocene structural movements in Thomas County, Ga., by C. VV. Sever__________________________________________...upture phenomena in the Silver Plume Granite, Colorado, by F. T. Lee and T. C. Nichols, Jr_____________________...rock mechanics research on Silver Plume Granite, Colorado, by T. C. Nichols, Jr., and F. T. Lee--------...and late Tertiary silicic volcanism in the Canyon City quadrangle, northeastern Oregon, by T. P. Thayer...Uncbmpahgre uplift and Unaweep Canyon, west-central Colorado, by F. W. Cater_______________________ Par(cutin |  | | Report (issue) | | Geology and Mineral Resources New Mexico Institute of Mining and Technology Socorro, NM 87801 ginger@gis.nmt...Texas, and Mexico range from small (Apache Warm Springs, 39,063 metric tons Be, grade <0.26% Be) to world-class...Harding pegmatite, Taos County. Current drilling in the Apache Warm Springs deposit in the Sierra Cuchillo...in the Sierra Cuchillo south of the Apache Warm Springs deposit, is a contact metasomatic W-Be-Sn-Fe deposit...were discovered in the Victorio Mountains, Luna County in the early 1900s. Gulf Minerals Resources, Inc |  | | Book (volume) | | 56 ct), Sweet Home Mine, Colorado; colorless scheelite (19.66 ct), Kern County, California; octagonal...Vivid blue matched benitoite gems from San Benito County, California, consisting of 52 benitoites and 75...1-800-234-5308 + IDE DS AED 3) June Culp Zeitner, of Rapid City, South Dakota, for her lifelong devotion to the... George F. Kunz, of Tiffany & Company, New York City, whose famous Gems and Precious Stones ofNorth America...events to bring the history of North American gem mining up to date. Here, then, is the latest, most complete | | | Book (volume) | | rhoColorado; eolorless scheelite (19.66 cc), Kern Cowny, California;...Vivid blue matched benitoite gems from Sai, Benito County, California, consisting of 52 benitoites and 75...97 D E DICATED TO ] une Culp Zeitner, o/ Rapid City South Dakota, /or her /;/efong devotion to the study...George F. Kunz, of Tiffany & Cornpany, New York City, whose farnous Gems and Precious Stones of.North...and interviews with persons actively engaged in mining gemstones. Pertinent references are furnished throughout |
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