 | | Journal (article/letter/editorial) | | December 2012 Flgun 1. View from the summit of Pika Peak looking northwest acro88 the cliff’s of Glen Cove...northeasterly-trending continentul Figure 2. Geologic map of the Colorado Front Range showing the Precambrian metamorphic...I-billion-year-old formbasin was established in the southeril Pikes Peak Batholith. Adapted by the author from Reed, Bickford...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 |  | | Journal (article/letter/editorial) | | MINERALOGY OF THE MOUNT ROSA AREA, EL PASO AND TELLER COUNTIES, COLORADO. II. PEGMATITESI EuceNB B. Gnoss...the Pikes Peak granite and in related alkalic granites in the Mount Rosa area, west of Colorado Springs...Springs. One is the older calc-alkalic Pikes Peak type; the younger is the alkalic Mount Rosa type. The accessory...aluminofluorides. These dikes intrude both the Pikes Peak and its derivative fayaiite granites along northeast-trending...pegmatites contrast markedly with the coexisting Pikes Peak pegmatites, which are characterized by quartz |  | | Journal (article/letter/editorial) | | DIKES OF MOUNT ROSA COMPLEX AREA, COLORADO FRONT RANGE, COLORADO, USA SARAH L. HANSON§ Adrian College,...Madison Street, Adrian, Michigan 49221, USA, GARY ZITO Colorado School of Mines, Metallurgical and Materials...Department, 1500 Illinois Street, Golden, Colorado 80401, USA Keywords: pegmatite, beryllium mineralization...INTRODUCTION The Mount Rosa Complex (MRC), located in the Colorado Front Range, extends from St. Peters Dome in the...of the Pikes Peak Intrusive Center within the larger 1.08 Ga Pikes Peak Batholith. The Pikes Peak Intrusive |  | | Journal (article/letter/editorial) | | 20:04 16 May 2014 Stove Mountain Area Colorado Springs, Colorado All photos by Gary Zito unless otherwise...otherwise noted 224 ROCKS & MINERALS GARY ZITO Colorado School of Mines Metallurgical and Materials Engineering...Engineering Department 1500 Illinois Street Golden, Colorado 80401 gzito@mines.edu SARAH L. HANSON Adrian...20:04 16 May 2014 in the Stove Mountain area of Colorado have provided numerous attractive specimens of...Unlike the better known pegmatites within the Pikes Peak Batholith, this area is also notable for its |  | | 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? ......................................of Colorado ..................................349 by J. A. Murphy Amazonite from the Pikes Peak batholith...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 (article/letter/editorial) | | Variety Amazonite Yucca Hill Prospect, Park County, Colorado T H I S I S S U E ' S C O N N O I S S E U...granite bodies, such as Col orado's Pikes Peak Batholith and the Harney Peak Granite in the Black Hills of...Pala district, California; the general Pikes Peak area of Colorado; gem pegmatites of the New England states;...pegmatites in the Pikes Peak region of Colorado and include sites in Douglas, E l Paso, Park, and Teller...Teller counties. A review of the more im portant Colorado amazonite localities is given by Eckel (1961) |  | | Journal (article/letter/editorial) | | Granite- a rare-metal-rich Precambrian pluton, Colorado, USA G. A. DESBOROUGH, S. D. LUDINGTON, AND W. N...N. SHARP US Geological Survey, Denver, Colorado, USA SUMMARY. The Precambrian Redskin stock is a highsilica...forms a late pluton related to the looo Ma-old Pikes Peak batholith. Zircon, fluorite, fluocerite, ilmenorutile...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 |  | | 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."...area. The largest fine-quality topaz specimens in Colorado occur in several separate and distinct localities...within the large (1,080 mi ) and well-exposed Pikes Peak batholith. The batholith, slightly more than |  | | Report (issue) | | Denver, Colorado, USA © 2011 by Lithographie, LLC P.O. Box 11613 • Denver, CO 80211 • USA Phone 1.303...collection Robert Weldon photo Above: Topaz, 5.5 cm tall El Chalten, Santa Cruz, Argentina Scott Rudolph collection...Topaz ALFREDO PETROV & JOHN RAKOVAN 34. Colorful Colorado DAVID W. BUNK 42. Mongolian Topaz: The Gorkhi...and quartz, 5.3 cm tall Sawtooth Mountains, Boise County, Idaho shown under longwave ultraviolet light (left)...fluoresces brightest under longwave light at 350 nm (peak at about 352 nm). Don Newsome collection Jeff Scovil |  | | Report (issue) | | area, Colorado Distribution of Beryllium Tin, and Tungsten in the Lake George area, Colorado By C....BERYLLIUM, TIN, AND TUNGSTEN IN THE LAKE GEORGE AREA, COLORADO By C. C. HAWLEY and W. R. GRIFFITTS Abstract...ores in the China Wall cupola, recognition of cassiterite in at least three places, and discovery of bertrandite...bodies of Precambrian age in the Lake George area, Colorado. They include greisens that contain high concentrations...correlative granites and subsequently by the Pikes Peak and Redskin Granites slightly more than 1.0 billion |  | | Journal (volume) | | fluorite, ± quartz, ± relict feldspar, ± topaz, ± cassiterite, ± su lfide s, ± apatite. Quartz is usually the...of them contain variable amounts of sulfides, cassiterite, wolframite, genthelvite (a mineral new to Finland)...Finland), beryl or bertrandite. Besides the cassiterite-bearing greisen bodies, those containing genthelvite...the S\V part of the g ranite massif. Quartz, cassiterite, wolframite and 679--! \ ";~ -cr-",oI·,o...(BeB) bertrandite; (Be G ) genthelvite; (Sn) cassiterite; (W) wolframite. FIG. 8 GeoJogicaJ Survey |  | | Journal (article/letter/editorial) | | Cornwall, England (Davidson, 1930), Leadville, Colorado (Laughlin and Behre, 1934) and the Cordillera...writer (1948) in the Eight Mile Park district of Colorado. Emmons (1940, pp. 23-24) related the zoning to...graphic granite, albite, schorl and rarely some cassiterite. A well developed internal structure occurs in...bodies are albitized and contain associated cassiterite, muscovite, lepidolite, alkali tourmaline, triplite...only small amounts of columbite-tantalite or cassiterite. In the schists and gneisses,exterior pegmatites |  | | Journal (article/letter/editorial) | | 04:13 19 December 2014 Mount Antero, Chaffee County, Colorado A s virtually every collector knows, many...and some districts, such as those in San Diego County, California, and many of those in Minas Gerais...aquamarine localities, Mount Antero, Chaffee County, Colorado, was highlighted by Jacobson and Lees (2008)... at Waterford, Oxford County; and the Square pit at Topsham, Sagadahoc County, Maine. Good crystals are...North Chatham, Carroll County, and the Sugarloaf Mountain area, Grafton County, New Hampshire. Other New |  | | Journal (article/letter/editorial) | | Geological Survey, Denver Federal Center, Denver, Colorado 80225, U.S.A. MARCO POPPI§ Dipartimento di Scienze...Salamanca, Spain, is associated with quartz, cassiterite and albite (Roda et al. 1995). Sample 2 is from...129 and 147 are from the anorogenic Pikes Peak batholith (Colorado). Sample 129 is from a miarolitic cavity...near Spruce Grove Campground (Tarryall area, Park County). The muscovite is associated with microcline,...pegmatites. Sample 147 is from near Glen Cove (El Paso County) and is associated with microcline and smoky |  | | Journal (article/letter/editorial) | | (manganoan) varieties are found at the Harding mine, Taos County, New Mexico (Jahns and Ewing 1977). Fuchsite is...typically occur in granite pegmatites and in cassiterite-bearing pneumatolytic (high-temperature gas-filled)...and often have interesting associates such as cassiterite, wolframite, topaz, scheelite, tourmaline, and...and fluorite. A classic association from El Paso County, Colorado, is well-crystallized zinnwaldite with...microcline (amazonite). Chemical analyses of Pikes Peak zinnwaldites (Kile and Foord 1998) show that |  | | Report (issue) | | Beryllium Area, Park and Jefferson t:-1 Counties, Colorado g ~ s:p ~ I> li:tl ~ GEOLOGICAL SURVEY PROFESSIONAL...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 PAPER 608-A A...Silver Plume(?) Granite ____________________ _ Pikes Peak Granite and associated rocks _____ _ Gabbro and...and monzonite _________________ _ Pikes Peak Granite ____________________ _ Redskin Granite _______________________ |  | | Book (edition) | | MILEAGE L OGS. REVISED EDITION Revised Edition, COLORADO GEM TRAILS AND MINERAL GUIDE HICllAHD :--1. PEARL...an extensive ¥em and mineral collecting tour 01 Colorado, revealing the interesting places where Nature...highways. Latest information is given on local tra\'el and collecting conditions and land ownership, so...Swallow, Publisher) 2679 South York Street Denver, Colorado 80210 - , =· - ·, BOOKS BY RICHARD M. PEARL...Minerals, Fossils in Colorado America's Mountain: Pikes Peak and the Pikes Peak Region Seven Keys to |  | | Report (issue) | | 38 X-ray Powder Pattern: St. Peters Dome, Colorado, USA. 4.35 (10), 2.13 (6), 1.837 (6), 1.813 (6),...ralstonite, weberite, jarlite, siderite, hematite, cassiterite, quartz. Distribution: In Germany, from Altenberg...Tasmania, Australia. In the USA, at St. Peters Dome, near Pikes Peak, El Paso Co., and in the Goldie carbonatite... McClure Mountain-Iron Mountain, Fremont Co., Colorado; in the Dugway district, Tooele Co., Utah; at |  | | Journal (article/letter/editorial) | | Museum of Nature and Science 2001 Colorado Boulevard Denver, Colorado 80205-5798 jmurphy @ dmns.org PETER...Survey MS 150, Box 25046 Federal Center Denver, Colorado 80225-0046 pmodresk @ usgs.gov Unless otherwise...to 2000) J oin us for a gemstone tour around Colorado! Our field trip takes us from east to west in...in the same way you may have toured through Colorado on a mineral collecting trip. This route, from the...gemstones are known to occur. We cannot discuss every Colorado gemstone occurrence; rather, this is a general |  | | Journal (issue) | | R. Kampf Natural History Museum of Los Angeles County George Robinson National Museums of Canada Arthur..................................203 R. Barnes Pikes Peak Granite........................................SPECIMENS from the collection of the Geology Museum, Colorado School of Mines. See page 242 for a full description... All rights reserved. notes fromthej EDITOR COLORADO-III Here we are with our third special issue devoted...devoted to the mines and minerals of Colorado. As most long-time subscribers know, the first in the series |  | | Book (edition) | | — _ ; COLORADO GEM TRAILS AND MINERAL GUIDE ! ■ : ' BOOKS BY RICHARD M. PEARL Colorado Gem Trails...Mineral Guide Colorado Rocks, Minerals, Fossils America’s Mountain: Pikes Peak and the Pikes Peak Region American...Nature As Sculptor: A Geologic Interpretation of Colorado Scenery Guide to Geologic Literature Popular Gemology...Gemology Mineral Collectors Handbook Colorado Gem Trails The Art of Gem Cutting (With Dr. H. C. Dake)...Dake) * RICHARD M. PEARL ★ COLORADO GEM TRAILS AND MINERAL GUIDE ★ SKETCH MAPS BY MIGNON WARDELL PEARL |  | | Journal (article/letter/editorial) | | Location map of major topaz deposits. 1. San Diego County, California pegmatites; 2. western U.S. topaz rhyolite...rhyolite belt (includes some pegmatites); 3. Mason County, Texas; 4. topaz rhyolite belt of Mexico; 5. Appalachian...(above). Topaz, Little Three mine, Ramona, San Diego County, California. NMNH specimen 147660. Figure 4 (right)... figure & Topaz, 4.5 em long, Pikes Peak, FJ PSl'lO County, Colorado. NMNH specimen R8772. 18 ROCKS...niobian and tantalian rutile, columbitetantalite, cassiterite, monazite, apatite, and schorl. Topaz granites |  | | Journal (issue) | | Cooper Nottingham, England Anthony R. Kampf L.A. County Mus. of Nat. Hist. Los Angeles, CA Joseph A. Mandarino...localities: The Cripple Creek Mining District, Colorado . . . . . . . . . . . . . . . . . . . . . . ....collection to the Natural History Museum of Los Angeles County. Julius Weber was well known in the mineral community...Department of the Natural History Museum of Los Angeles County has placed a high priority on building its micromount...collecting benitoite and neptunite” in San Benito County, California. Bryan Lees (current lessee of the |  | | Journal (article/letter/editorial) | | PLUTON OF THE WAUSAU SYENITE COMPLEX, MARATHON COUNTY, WISCONSIN Alexander U. FALSTER§ Department of...Wausau syenite complex, exposed in central Marathon County, Wisconsin, is an A1-type within-plate granitoid...fluorine-enriched), located in central Marathon County, Wisconsin (Fig. 1), forms part of a NE–SW-trending...having abundant hübnerite–ferberite, topaz, cassiterite, and also cryolite and prosopite (Table 1). The... 2012). However, the South Platte pegmatites (Colorado) exhibit an astonishing REE concentration in the |  | | Journal (article/letter/editorial) | | Department, 110 S. Madison St., Adrian, Michigan 49221, USA ABSTRACT Pegmatites containing rare elements can...Wisconsin, USA McAllister pegmatite, Alabama, USA S. Maine pegmatites, USA Brown Derby, Colorado, USA San Diego...Diego Co., California, USA Black Hills, South Dakota, USA Red Cross Lake, Manitoba Canada Mavis Lake...Granite Peninsular Ranges Batholith Harney Peak, Calamity Peak granites Unnamed leucogranite Ghost Lake...Pegmatites Mount Antero, Colorado, USA South Platte, Colorado, USA Lake George, Colorado, USA Mt. Rosa/Stove Mtn |
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