 | | 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 Park–Bear Creek, El Paso County, CO, USA Pikes...NYF Miarolitic topaz, amazonite, phenakite Pikes Peak Granite NYF Miarolitic topaz, amazonite, phenakite... 3 Mount Antero and Mount White, Chaffee County, CO, USA Mount Antero Granite NYF Miarolitic beryl |  | | 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) | | 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) | | 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...quartz, microcline and some muscovite, garner, schorl and beryl. Pegmatites of the relatively narrow...contain microcline, quattz, graphic granite, albite, schorl and rarely some cassiterite. A well developed internal...units and generally are tabular or lens-like sills. Schorl is characteristically rare, but many bodies are |  | | 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... 6 TOPAZ Topaz and Associates Above: Topaz, schorl, and albite, 7.8 cm tall; Shigar Valley Gilgit-Baltistan...and quartz, 5.3 cm tall Sawtooth Mountains, Boise County, Idaho shown under longwave ultraviolet light (left) |  | | 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 |  | Foord, E. E., Černý, P., Jackson, L. L., Sherman, D. M., Eby, R. K. (1995) Mineralogical and geochemical evolution of micas from miarolitic pegmatites of the anorogenic pikes peak batholith, Colorado. Mineralogy and Petrology, 55 (1) 1-26 doi:10.1007/bf01162576 | Journal (article/letter/editorial) | | miarolitic pegmatites of the anorogenic Pikes Peak batholith, Colorado E. E. Foord 1, P. Cern~ z, L. L. Jackson...Mineral Resources, U.S. Geological Survey, Denver, USA Department of Geological Sciences, University of...Denver, USA Branch of Geophysics, U.S. Geological Survey, Denver, USA Topometric, Bedminister, USA With...granitic units of the anorogenic Pikes Peak batholith (1.08-1.02 Ga), Colorado range in composition, and follow...local topaz or fluorite, and rarely tourmaline (schorl-elbaite). Progressively younger micas of the main |  | | Journal (article/letter/editorial) | | Mineralogy and crystal chemistry of micas from the A-type El Portezuelo Granite and related pegmatites, Catamarca...University, Provo, Utah 84602, USA Corresponding author The A-type El Portezuelo Pluton (Catamarca, NW...depleted compared with the dioctahedral rims. Micas in El Portezuelo are the most important F-bearing species...very similar to that found at the Pikes Peak Batholith (Colorado USA) and is characteristic of NYF-type...from various occurrences in the Pikes Peak Batholith, central Colorado (USA), and confirmed that they are |  | | 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) | | accepted abstracts follow. THE GARNET LINE IN OXFORD COUNTY, MAINE, PEGMATITES. M. M. Felch, W. B. Simmons...intermediate and core zones in many of the Oxford County, Maine, pegmatites. This study primarily focuses...similar to the model proposed for the San Diego County pegmatites (Webber et al. 1997, 1999). The garnet...shallow level pegmatite-aplite dikes, San Diego County, California. American Mineralogist 84:708–17. ...IN MIAROLITIC CAVITIES IN ALKALI DIKES, AUGUSTA COUNTY, VIRGINIA. L. E. Kearns1, R. Rothenberg2, T. Tucker3 |  | | Report (volume) | | Del Norte County; Trinity River, Trinity County; Spanish Creek and Gopher Hill, Plumas County; Placerville...and Webber Hill, El Dorado County; Cherokee Flats, Yankee Hill,and Oroville, Butte County; French Corral...Corral, Nevada County; Indian Gulch and Volcano, Amador County; and Alpine Creek, Tulare County. Other western...Diamond Basin, Ada County, Idaho; Curry County, Oreg.; and Nelson Hill, near Glacier County, Mont. The Great...Pierce County; Oregon, Dane County; Kohlsville, Washington County; Saukville, Ozaukee County; Eagle, |  | | Journal (article/letter/editorial) | | Tree Root Pocket, Two Point claim, Pikes Peak batholith, Teller County. The Collector’s 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 state’s minerals is Colorado Rockhounding, by Voynick (1994). Other published |  | | 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...columbitetantalite, cassiterite, monazite, apatite, and schorl. Topaz granites typically occur as small stocks |  | | Journal (issue) | | Gem & Mineral Club News June 2019 Now retired to Colorado, Dr. Carnein was an active member of NMS when...occur at the Devils Hole mine, in Fremont County, Colorado). More typically, they are on the order of...Figure 4. Typical granite pegmatite with accessory schorl (black), muscovite (silvery gray), and garnet (dark...(dark brown). Devils Hole mine, Fremont County, Colorado. (Carnein photo and collection) page 4 NITTANY...Carnein Lake George Gem & Mineral Club Lake George, Colorado (RMFMS) From: Lake George Gem & Mineral Club News |  | | Journal (issue) | | (RMFMS) www.rmfms.org Colorado Federation of Gem & Mineral Societies (CFGMS) Colorado Springs Mineralogical...Enormous Odds to Become Fossilized By Victor Gordillo—Colorado Springs Mineralogical Society Junior Member The...Pg 7 PRESIDENT’S CORNER Pg 7 My Interest in Colorado Geology Pg 9 Traveling the Blue Highways: Black...SPRINGS MINERALOGICAL SOCIETY PO BOX 2 PICK COLORADO SPRINGS, COLORADO 80901-0002 www.csms.us Page 1 February...Hancock in Colorado Springs. The Senior Center is located at 1514 North Hancock in Colorado Springs. |  | | Journal (article/letter/editorial) | | PEGMATITES OF EIGHT MILE PARK, FREMONT COUNTY, COLORADOXT E. Wrrr. HerNnrcu, Department of Mineralogy...o r m a t i o n . . . . . Hornblende gabbro. Pikes Peak granite .. . . . Aplite and fine-grained granite...to twelve miles west of Canon City, Fremont County, Colorado, includes about 30 square miles that lie at...separate paper. 420 PEGMATITES OF EIGHT MILE PARK, COLORADO 42r area are flanked on the east by hogbacks...Three major pre-Cambrian rock units are present: Pikes leak granite, Idaho Springs schist, and injection |  | | Journal (issue) | | at Silver Reef in southwestern Utah’s Washington County (figure 1) is a very unique occurrence. The high-grade...perfect bound for just: $35.00 Postage $5.00 in the USA; $23 for foreign. Excalibur Mineral Corp Tel: 434-964-0875...book filled with historical work involving Oxford County, describing and intertwining its minerals, miners...Experiences in Namibia The Ravine, Fine, St. Lawrence County, New York Antimony-bearing Oxidized Minerals -...Pershing County, Nevada Majuba Hill Continued-Collecting Underground Postcards Coppertown USA Mining Museum |  | | 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 |  | | Journal (issue) | | Colorado Springs Mineralogical Society Founded in 1936 Lazard Cahn Honorary President May 2017 PICK&PACK...Other Events Pg 2 Purpurite (Phosphate) From Colorado and Pg 3 South Dakota Pebble Pups Rudist Fossil...containing phosphorus, niobium and lithium. In Colorado, he is known for writing the book Antero Aquamarines...presentation. COLORADO SPRINGS MINERALOGICAL SOCIETY PO BOX 2 COLORADO SPRINGS, COLORADO 80901-0002 May...Senior Center is located at 1514 North Hancock in Colorado Springs. For more information on any of the sub-groups |  | | 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) | | (manganoan) varieties are found at the Harding mine, Taos County, New Mexico (Jahns and Ewing 1977). Fuchsite is...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...the 50:50 composition. The Morefield mine, Amelia County, Virginia, has produced many excellent large crystals...blue calcite from the Crestmore quarry, Riverside County, California, are typical of the species; a recent |  | | Journal (issue) | | Three mine pegmatites, Ramona district, San Diego County, California ............................101 by...25046, M .S. 905 Denver Federal Center Denver, Colorado 80225 In recent decades the science of mineralogy... 905 Box 25046 Denver Federal Center, Denver, Colorado 80225 Louis B. Spaulding, Jr. P. O. Box 807, Ramona...Three property in the Ramona district, San Diego County, California. This mine, strictly speaking, is developed...for the other pegmatite gem mines in San Diego County, the collapse o f the Chinese tourmaline market |  | | Journal (article/letter/editorial) | | CARBONATITES OF THE ARKANSAS RIVER CANYON, FREMONT COUNTY, COLORADO. 3. THE AMETHYST CARBONATITESl E. Wu. HBrNnrcH...Amethyst carbonatites in 12 Mile Park, Fremont County, Colorado are the northernmost representatives of the...Valley in Fremont and Custer Counties, Colorado (Christman el, al., 1959; Singewaldand Brock, 1956;Heinrich... 1. Index map of Fremont and Custer Counties, Colorado showing location of Amethyst carbonatites. 1a-1b...The host rock of the dikes is the gneissoidPikes Peak granite of Precambrian age whose foliation strikes |  | | Journal (issue) | | Jean COWMAN & Philip PERSSON Tribute Pocket, CO, USA Mineral photography: James Elliott INTRODUCTION...claim, Colorado, USA. HISTORY: DISCOVERY AND RE-DISCOVERY Topaz has been known from the Pikes Peak area...this mine. Associated Photographer: Jeff Scovil (USA) Topaz is a rather common mineral, forming during...south-eastern portion of the Pikes Peak massif, El Paso County, Colorado, was one of the most significant... INTRODUCTION Associated Editors: Paul Cragan (USA) Malcolm Southwood (Australia) P. Persson photo |  | | Other Paper | | f11Ll, <:...Ofd';' UL e,( AMAZONITE FROM THE PIKES PEAK BATHOLITH by Eugen• E. Foord Stop 905 ·.U.S...G•ologica.l Survey Deaver Fedoral Ce�ter Lakewood, Colorado 80225 a..nd Robert F. Ma.rtin Dept. of Geologic�l...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 ar�a. • Crystals and specimens of Colorado amazonite are among the finest ·in the world1 |
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