 | | Journal (article/letter/editorial) | | December 2012 Flgun 1. View from the summit of Pika Peak looking northwest acro88 the cliffâs 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 âEarly, Middle, and Lateâ 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...columbite, bertrandite and rare aluminofluorides. These dikes intrude both the Pikes Peak and its derivative...pegmatites contrast markedly with the coexisting Pikes Peak pegmatites, which are characterized by quartz |  | | Journal (article/letter/editorial) | | IVAN JACOBSON 1714 S. Clarkson Street Denver, Colorado 80210 markivanjacobson@gmail.com No pegmatite...Granite, near Red Stone quarry, Conway, Carroll County, New Hampshire. Henry Minot specimen and photo...Crystal Peak, Teller and Park counties, CO, USA Crystal ParkâBear Creek, El Paso County, CO, USA Pikes...NYF Miarolitic topaz, amazonite, phenakite Pikes Peak Granite NYF Miarolitic topaz, amazonite, phenakite...Chaffee County, CO, USA Mount Antero Granite NYF Miarolitic beryl, phenakite, bertrandite Jacobson |  | | Journal (issue) | | Microminerals from Pegmatites in the Pikes Peak Batholith, Central Colorado Daniel E. Kile Research Associate...Nature & Science 5176 Black Bear Run - Littleton, Colorado 801215 Email: centennial87@comcast.net were sparse...number of localities throughout the Pikes Peak batholith in central Colorado, and many of them provide spectacular...found in pegmatites in the Pikes Peak batholith (PPB) in central Colorado. Although some minerals, such...samples An overview of weathered Pikes Peak Granite within the Pikes Peak batholith, in an area north of |  | | 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...phenakite, bertrandite. INTRODUCTION The Mount Rosa Complex (MRC), located in the Colorado Front Range...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 Whatâs 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) | | MIAROLITIC CAVITY IN CHEYENNE CANYON, EL PASO COUNTY, COLORADO GARY ZITO Colorado School of Mines, Metallurgical...Engineering Department, 1500 Illinois St., Golden, Colorado 80401, U.S.A. SARAH L. HANSON§ Adrian College...cavity in a pegmatite in Cheyenne Canyon, El Paso Co., Colorado has an unusual mineral assemblage that includes...a pegmatite pocket in Cheyenne Canyon, El Paso County, Colorado. This location is about 2 km north of...Cheyenne Canyon lies in the southernmost part of the Pikes Peak batholith, a composite batholith that is subdivided |  | | 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) | | 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 |  | | Journal (article/letter/editorial) | | The most productive collecting area is the low peak in the center. This is probably the oldest existing...pegmatite prospecting on Mount Antero, Chaffee County, Colorado, gives a detailed account of fine min eral-specimen...TYPES OF BERYLLIUM DEPOSITS AND OCCUR RENCES IN COLORADO AND SOME EXAMPLES I . Deuteric-magmalic. Beryl-bearing...miarolitic pegmatites in granite ( ± phenacite and bertrandite). Mt. Antero. 3. Large zoned pegmatites in metamorphic...Lode) and Devils Hole, Fremont County; Crystal Mountain, Larimer County. B. Phenacite. Mt. Antero. C. |  | | 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 _______________________ |  | | Journal (article/letter/editorial) | | in West Cheyenne Canyon, El Paso County, Colorado, is located in the Pikes Peak batholith, a composite...composite of the Pikes Peak Granite and a series of late-stage potassic and sodic granite plutons (Raines 2001;...crystals. Other genthelvite localities in the Pikes Peak batholith are Crystal Park, Cookstove Mountain...Dunn (1977). In the Northern Cascades of Okanogan County, Washington, the alkaline granites of the Golden...described in 1892 from West Cheyenne Canyon, El Paso County, Colorado, by Frederick August Genth (1820â1893) |  | | Journal (volume) | | Bulletin 259 important beryllium minerals are bertrandite, beryl, chrysoberyl, minerals of the helvite...genthelvite (a mineral new to Finland), beryl or bertrandite. Besides the cassiterite-bearing greisen bodies...Genthelvite-bearing g rei sens, FinJ and 7 and bertrandite. The Tarkki granite itself contains danalite...greisen; (8) d rill ho le; (Be) beryl; (BeB) bertrandite; (Be G ) genthelvite; (Sn) cassiterite; (W) wolframite...cutting migmatite on the SE side of the massif. Bertrandite occurs in variable amounts in some small greisen |  | | 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 |  | | 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 NEâSW-trending... 2012). However, the South Platte pegmatites (Colorado) exhibit an astonishing REE concentration in the...Monazite-group species c c Bavenite r Muscovite r c Bertrandite r Niobian rutile r r r Beryl vr Parisite-(Y) |  | | Journal (article/letter/editorial) | | GREISENPIPESAND ASSOCIA'IEDDEPOSITS, PARK COUNTY, COLORADO* Wrr.uelr N. Snanr, U. S. GeologicalSuntey...noted by the author in the greisen deposits of Park County, Colo., during fieid studiesin the summer,rf 1960...Tanganyika (McKie, 1955). Euclase is associatedwith bertrandite in an altered beryl crystal in pegmatite at Iveland...LocarroN AND FrELD Rnr-.q.rrous Euclase in Park County, Colo., is in small pipe-shapedbodies of greisen...greisen in the Redskin Gulch area within the Pikes Peak granite mass, x Publication authorized by the Director |  | | 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...cassiterite in at least three places, and discovery of bertrandite at the Redskin molybdenum prospect. The Boomer...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 (article/letter/editorial) | | FLUOCERITEAND ASSOCIATED CLOUDPEGMATITE,TELLER COUNTY,COLORADOX E. Wrt. HBrNnrcn AND EuGENEB. Gnoss,...Highway 24, 2.3 miles west of Divide in Teller County, Colorado, was studied in June 1957and June 1958.Laboratory...of the pegmatitesof the South Platte-Pikes Peak area of Colorado, to which field work during the last...n n a i s sancestudy of rare-earthpegmatitesin Colorado(Heinrich, 1948). The lensoidpegmatite, well exposedin...generally steeply dipping to vertical contacts with Pikes Peak granite. It is nearly 350 feet long, and at its |  | | Book (edition) | | â _ ; COLORADO GEM TRAILS AND MINERAL GUIDE ! â : ' BOOKS BY RICHARD M. PEARL Colorado Gem Trails...Mineral Guide Colorado Rocks, Minerals, Fossils Americaâs 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 â
COLORADO GEM TRAILS AND MINERAL GUIDE â
SKETCH MAPS BY MIGNON WARDELL PEARL |  | | 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 |  | | 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 |  | | 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 |  | | Other Paper | | f11Ll, <:...Ofd';' UL e,( AMAZONITE FROM THE PIKES PEAK BATHOLITH by Eugenâą E. Foord Stop 905 ·.U.S...Gâąologica.l Survey Deaver Fedoral Ceïżœter Lakewood, Colorado 80225 a..nd Robert F. Ma.rtin Dept. of Geologicïżœl...hues and intensities, has been known from the Pikes Peak batholith for over 110 years. Strictly speaking...amazoni te. The first description of amazonite from Colorado appears to have been that of Hollister (1867)...development of the arïżœa. âą Crystals and specimens of Colorado amazonite are among the finest ·in the world1 |  | | Journal (article/letter/editorial) | | quartz, Manhan River mine, Easthampton, Hampshire County, Massachusetts. Marvin Rausch specimen, Jeff Scovil...branch of the Calumet and Hecla mine, Houghton County, Michigan. A. E. Seaman Mineral Museum (Michigan...JulyIAugust: Vanadinite and wulfenite, Old Yuma mine, Pima County, Arizona. Les Presmyk specimen, Jeff Scovil photo...claim, Lake George intrusive center, Teller County, Colorado. Dave Bunk specimen, Jeff Scovil photo. November/December:... Eagle mine, Gilman County, Colorado. Dave Bunk specimen on loan to the Colorado School of Mines, Jeff |
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