 | | Journal (article/letter/editorial) | | 2013 Fluorite in Granitic Pegmatites MARK IVAN JACOBSON 1714 S. Clarkson Street Denver, Colorado 80210...octahe- dral or cubic fluorite crystals perched on earlier-formed minerals. Fluorite is almost always a...quartz are enhanced by a purple or green cube of fluorite hanging from a crystal face or nestled on a crystal...Index map showing the major worldwide pegmatitic fluorite localities, prepared by William Besse. The numbers...ROCKS & MINERALS Figure 1. Fluorite, 10 Ă 7.2 Ă 5.7 cm, from the Conway Granite, near Red Stone quarry, |  | | Journal (article/letter/editorial) | | MOUNT ROSA AREA, EL PASO AND TELLER COUNTIES, COLORADO. I. THE GRANITES1 E. B. Gnoss2.q.uoE. Wlr. HnrNnrc:r^...pattern'lvithin the Pikes Peak batholith. segregations consist of small elongate bodies of fayalite granite and porphy'1i1is...porphy'1i1is granite. These igneous bodies are transected by northwest-trending dikes of granite and aplite...fayalite granite are fayalite, fluorite and allanite. Sill-like bodies of Windy Point granite contain...accessories similar to those of the porphyritic granite, namely, fluorite, anatase and pyrrhotite, with lesser monazite |  | | Journal (article/letter/editorial) | | the summit of Pika Peak looking northwest acro88 the cliffâs of Glen Cove to South Park and the Tarryall...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) | | MOUNT ROSA AREA, EL PASO AND TELLER COUNTIES, COLORADO. II. PEGMATITESI EuceNB B. Gnoss, CaliJornia Diris...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...pegmatites consists chiefly of radioactive zircon, fluorite, astrophyllite, thorite, and lesser amounts of...aluminofluorides. These dikes intrude both the Pikes Peak and its derivative fayaiite granites along northeast-trending |  | | Journal (article/letter/editorial) | | N{OUNT ROSA AREA, EL PASO AND TELLER COUNTIES, COLORADO III. LANIPROPHYRES AND MINERAL DEPOSITS1 E. B...syenites and sodic diorites. They intrude Pikes Peak granite, its variants, and Mount Rosa-type pegmatites...overlapped that of Mount Rosa-type pegmatites' Veins of fluorite strike mainly north or northeast and dip steeply...Strongly radioactive altered zones in Mount Rosa granite contain uranothorite and thorogummite, which also...the Mount Rosa area, El Paso and Teller Counties,Colorado,we report the results of studies on nearly 50 |  | | 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...of quartz, microcline, albite, and fluorite, as well as rarer accessory minerals. Opaque brown zircons |  | | Report (volume) | | Geology of the Platte Canyon Quadrangle Colorado By WARREN L. PETERSON CONTRIBUTIONS GEOLOGICAL TO...Biotite-muscovite granite..____-__-----------------_----_-___..Pikes Peak Granite-------------------...monzonite----_----___---------------_--_-------_--Granite __ _________________--___-_--___--_-_---______-_-_...quadrangle. _ In pocket FIGURE 1. Index map of Colorado showing location of the Platte Canyon quadrangle...GEOLOGY GEOLOGY OF THE PLATTE CANYON QUADRANGLE, COLORADO By WARREN L. PETERSON ABSTRACT The Platte Canyon |  | | Report (chapter) | | South Platte District, Colorado · by Wm. B. Simmons and E. Wm. Heinrich Colorado Geological Survey Department...Department of Natural Resources Denver, Colorado I 1980 Front cover: Wide Angle photograph of the Oregon...2~ pegmatite, South Platte pegmatite district, Colorado. This striking example graphically illustrates...RARE-EARTH PEGMATITE$ OF THE SOUTH PLATTE DISTRICT, COLORADO by Wm. B. Simmons, Jr. Department of Earth Sciences...Michigan Ann Arbor, Michigan 48109 CGS LIBRARY Colorado Geological Survey Department of Natural Resources |  | | Report (issue) | | Precambrian Crystalline Rocks, Park and Jefferson Counties, Colorado GEOLOGICAL SURVEY PROFESSIONAL PAPER...Precambrian Crystalline Rocks, Park and Jefferson Counties, Colorado By C. C. HAWLEY and R. A. WOBUS...OF THE SOUTHERN TARRYALL REGION, PARK AND JEFFERSON COUNTIES, COLORADO GEOLOGICAL SURVEY PROFESSIONAL... Late phases of the final intrusion, the Pikes Peak Granite, were accompanied by beryllium-bearing greisens...rocks, Park and Jefferson Counties. (Geology and ore deposits of the southern Tarryall region, Park and |  | | 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...OF THE SOUTHERN TARRYALL REGION PARK AND JEFFERSON COUNTIES, COLORADO GEOLOGICAL SURVEY PROFESSIONAL...association with the late Precambrian Redskin Granite UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON...______________ _ Silver Plume(?) Granite ____________________ _ Pikes Peak Granite and associated rocks _____ |  | | Journal (article/letter/editorial) | | n and Fluorite Crfstals the from Hdv Moses Pocket Downloaded by [134.117.10.200] at 10:40 30 December...December 2014 GODSEND CLAIM, LAKE GEORGE, COLORADO Figure 1. View of the terrible damage caused by the...necessary to use such means to retrieve crystals from Pikes Peak pegmatites. Jim Joy photo. Figure 3. A tripod...photo. RAYMOND R. BERRY 7513 Tudor Road Colorado Springs, Colorado 80919 rayber@peoplepc.com Figrtre 5....4314 Woodland Park, Colorado 80866 Raymond R. Berry is an active member of the Colorado Springs Mineralogical |  | | Report (issue) | | area, Colorado Distribution of Beryllium Tin, and Tungsten in the Lake George area, Colorado By C....spectrographic analyses of veins, greisen, and granite, ~ary Lee mine area ---------------------------------3...BERYLLIUM, TIN, AND TUNGSTEN IN THE LAKE GEORGE AREA, COLORADO By C. C. HAWLEY and W. R. GRIFFITTS Abstract...bodies of Precambrian age in the Lake George area, Colorado. They include greisens that contain high concentrations... and other metals associated with the Redskin Granite. Scheelite deposits in calc-silicate rocks and |  | | Journal (issue) | | England Richard C. Erd U.S. Geological Survey Menlo Park, CA Donald R. Peacor University of Michigan Ann...R. Kampf Natural History Museum of Los Angeles County George Robinson National Museums of Canada Arthur..............................203 R. Barnes Pikes Peak Granite......................................217...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 |  | Gagnon, J. E., Samson, I. M., Fryer, B. J., Williams-Jones, A. E. (2004) THE COMPOSITION AND ORIGIN OF HYDROTHERMAL FLUIDS IN A NYF-TYPE GRANITIC PEGMATITE, SOUTH PLATTE DISTRICT, COLORADO: EVIDENCE FROM LA ICP MS ANALYSIS OF FLUORITE-AND QUARTZ-HOSTED FLUID INCLUSIONS. The Canadian Mineralogist, 42 (5) 1331-1355 doi:10.2113/gscanmin.42.5.1331 | Journal (article/letter/editorial) | | NYF-TYPE GRANITIC PEGMATITE, SOUTH PLATTE DISTRICT, COLORADO: EVIDENCE FROM LAâICPâMS ANALYSIS OF FLUORITEAND...Quebec H3A 2A7, Canada ABSTRACT Hydrothermal fluoriteârare-earth-element REE mineralization occurs in...(NYF-type) hosted by the Proterozoic Pikes Peak granite in north-central Colorado. The mineralization comprises...comprises secondary albite, fluorite and REE minerals (predominantly samarskite and fergusonite) that replace...pegmatitic core-zone quartz, core-margin zone fluorite and wall-zone quartz and microcline perthite. |  | | Journal (issue) | | and fashioning of minerals. By Luke Sattler, Colorado Springs Mineralogical Society Junior Member This...Mineralogical Societies (RMFMS) www.rmfms.org Colorado Federation of Gem & Mineral Societies (CFGMS)...HIGHWAYS IV Pg 7 PRESIDENTâS CORNER Pg 7 Pikes Peak Gem & Mineral Show Pg 12 PPG&M Show Lectures...Pg 14 Continued. Pg 3 COLORADO SPRINGS MINERALOGICAL SOCIETY PO BOX 2 COLORADO May 2012 PICK SPRINGS...SPRINGS, & PACK COLORADO 80901-0002 Page 1 May 2012 CSMS Calendar June 2012 CSMS Calendar Tue., May 1âFossil |  | | 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."...(1883) as having been found "in the disintegrated granite on one of the steep slopes about 4 miles from Manitou...been in the Crystal Park area. The largest fine-quality topaz specimens in Colorado occur in several separate |  | | 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...in the Pikes Peak batholith (PPB) in central Colorado. Although some minerals, such as fluorite, hematite...samples An overview of weathered Pikes Peak Granite within the Pikes Peak batholith, in an area north of |  | | Journal (article/letter/editorial) | | EUCLASEIN 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...quartz vein deposits in mica-schist. Euclase in granite-pegmatite is recorded for Siiesia (Kolbeck and... 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 |  | | Journal (article/letter/editorial) | | Although Colorado may be most noted for rhodochrosite or amazonite, the many varieties and associations...a k e w o o d , Colorado 80225 DIANNE L. K I L E 333 S a l e m Street Aurora, Colorado 80011 C O L O...and J. A. Mur phy for an update to Minerals of Colorado: A 100-Year Record (Eckel, 1961). 374 ROCKS... Quartz was a familiar gemstone to many early Colorado residents, as documented by an extensive body...body of literature. The first published list of Colorado mineral localities (in cluding quartz) was included |  | | 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) | | Gem & Mineral Club News June 2019 Now retired to Colorado, Dr. Carnein was an active member of NMS when...grained groundmass). For example, a porphyritic granite might contain plagioclase crystals that are 2 cm...occur at the Devils Hole mine, in Fremont County, Colorado). More typically, they are on the order of...Such rocks have a porphyritic Figure 4. Typical granite pegmatite with accessory schorl (black), muscovite...garnet (dark brown). Devils Hole mine, Fremont County, Colorado. (Carnein photo and collection) page 4 |  | | Journal (article/letter/editorial) | | Tree Root Pocket, Two Point claim, Pikes Peak batholith, Teller County. The Collectorâs Edge specimen, Jeff...Mail Stop 150, Box 25046 Federal Center Denver, Colorado 80225 pmodreski@usgs.gov C olorado is, of course...been written as guides to mineral collecting in Colorado. A classic, which went through three major editions...1951 version with a slightly different title), is Colorado Gem Trails and Mineral Guide, by Pearl (1951,...up-to-date guidebook to the stateâs minerals is Colorado Rockhounding, by Voynick (1994). Other published |  | | 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 |  | | 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...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...Atlas of Colorado American Gem Trails Nature As Sculptor: A Geologic Interpretation of Colorado . Scenery |  | | Journal (article/letter/editorial) | | Crystal Peak area, north of Lake George, Colorado. The claim itself is in Teller County near the Park County...The Rocket mine is within the Pikes Peak batholith, a Precambrian granite between 1.03 billion and 1.05...(Hutchinson 1976). The pegmatites that intrude into the granite are classified as simple pegmatites, unlike the...believed to be slightly younger than the surrounding granite and are far tougher and less eroded. Pockets are...intrusions, at the contact between the soft, decomposed granite and the coarser-grained pegmatites. At the Rocket |
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Pikes Peak Granite, Park County, Colorado, USA