 | | Journal (article/letter/editorial) | | December 2012 Flgun 1. View from the summit of Pika Peak looking northwest acro88 the cliffās 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 āEarly, Middle, and Lateā Eras. In Colorado we because of the subsequent folding and overthrusting |  | | Journal (issue) | | Julius Weber Mamaroneck, New York COLORADO ISSUE #2 Articles Colorado locality index.............................. 323 by B. L. Muntyan Whatās 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) | | COLORADO TOPAZ Topaz, Al Si0 (F,OH) is one of Colorado's better known gem minerals. Though ColĀ 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 |  | | Other Paper | | f11Ll, <:...Ofd';' UL e,( AMAZONITE FROM THE PIKES PEAK BATHOLITH by Eugenā¢ E. Foord Stop 905 Ā·.U.S...Gā¢ologica.l Survey Deaver Fedoral Ceļæ½ter Lakewood, Colorado 80225 a..nd Robert F. Ma.rtin Dept. of Geologicļæ½l...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 arļæ½a. ā¢ Crystals and specimens of Colorado amazonite are among the finest Ā·in the world1 |  | | Book (edition) | | MILEAGE L OGS. REVISED EDITION Revised Edition, COLORADO GEM TRAILS AND MINERAL GUIDE HICllAHD :--1. PEARL...an extensive Ā„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 - , =Ā· - Ā·, BOOKS BY RICHARD M. PEARL...Minerals, Fossils in Colorado America's Mountain: Pikes Peak and the Pikes Peak Region Seven Keys to |  | | 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 |  | | Book (edition) | | ā _ ; COLORADO GEM TRAILS AND MINERAL GUIDE ! ā : ' BOOKS BY RICHARD M. PEARL Colorado Gem Trails...Mineral Guide Colorado Rocks, Minerals, Fossils Americaās 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 ā
COLORADO GEM TRAILS AND MINERAL GUIDE ā
SKETCH MAPS BY MIGNON WARDELL PEARL |  | Collins, Donley S., Cobban, Robert R., Foord, Eugene E., Murphy, Jack A. (1989) Bibliography for update and revision of U.S.G.S. Bulletin 1114, Minerals of Colorado -- a 100 year record, by Edwin B. Eckel, Part A - Paper copy --Bibliography data file disks. Open-File Report Vol. 1989 (89-206) US Geological Survey doi:10.3133/ofr89206a | Report (issue) | | Survey Denver, Colorado Department of Geology, Denver Museum of Natural History Denver, Colorado NOTE FOR...revision of U.S.G.S. Bulletin 1114, Minerals of Colorado A 100 year record, by Edwin B. Eckel By Donley...Prepared in cooperation with Friends of Mineralogy - Colorado Chaptar, and the Denver Museum of Natural History...references dealing with the mineralogy of the state of Colorado. It is part of a more than 10 year effort to update...and revise U.S.G.S. Bulletin 1114, Minerals of Colorado: A 100 year record, by Edwin B. 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...igneous rocks which are hosts for molybdenite ore in Colorado (Desborough and Sharp, I978; Desborough et al...is a late intrusive phase of the much larger Pikes Peak batholith (figs. I, 2), which was emplaced about |  | | 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 |  | | Journal (article/letter/editorial) | | 79409-1053, USA 2 DEPARTMENT OF EARTH SCIENCES, SYRACUSE UNIVERSITY, SYRACUSE, NY 13244-1070, USA RECEIVED...Coors Blvd., NW, Apt. 3606, Albuquerque, NM 87120, USA ā Corresponding author. Telephone: 806-742-3106 or...locations of ~1Ā·1 Ga magmatism in the USA: Mid-Continent Rift, Pikes Peak Batholith (PPB), Pecos mafic intrusive...(FM). Ī, diabasic dike swarms in the southwestern USA (e.g. Hammond, 1990; Larson et al., 1994). After...(Anderson, 1980) and the sodic series of the 1Ā·1 Ga Pikes Peak batholith (Smith et al., 1997). In this contribution |  | | Journal (issue) | | - - - - - - - - - - - Mineral Collections 1n Colorado A Supplement to The Mineralogical Record November-December..."Smithsonian packet," Smoky Hawk claim, Florissant, Colorado. Collected in 2008; Dorris Family collection;...certificates for mines in the Cripple Creek District, Colorado, in 1898 and 1901. Sponsorship: This special supplement...Collecting in Colorado The Collections: Mel & Pam Bersch Ryan Bowling Ralph Clark Colorado School of Mines...Thompson George Witters Martin Zinn III and Colorado in the :Mineralogical Record Supplement to The |  | | Report (volume) | | of the Thirtynine Mile Volcanic Field, Central Colorado GEOLOGICAL SLRVEY BULLETIN 1395-C IĀ§ ' Stratigraphic...of the Thirtynine Mile Volcanic Field, Central Colorado By RUDY C. EPIS and CHARLES E. CHAPIN CONTRIBUTIONS...OF THE THIRTYNINE MILE VOLCANIC FIELD, CENTRAL COLORADO By RUDY C. EPIS l and CHARLES E. CHAPIN 2 ABSTRACT...physiographic and tectonic settings in central Colorado. The volcanic field is characterized by andesitic...used informal names in our earlier reports for 1 Colorado School of Mines, Golden, Colo. 80401, and U.S |  | | 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...glassy margins and sometimes with phenocrysts of sanidine, quartz, or sodic plagioclase. Biotite, hornblende |  | | Report (issue) | | Resource Program Center P.O. Box 25287 Denver, Colorado 80225 March 2006 U.S. Department of the Interior...NPS/NRPC/GRD/NRRā2006/009. National Park Service, Denver, Colorado. NPS D-37, March 2006 Table of Contents List............15 Figure 5. Regional Map of Central Colorado. ...............................................for Florissant Fossil Beds National Monument in Colorado. It contains information relevant to resource...mammals. In 1992 a field crew from the University of Colorado Museum found fragments of a brontothere, which |  | | 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 neptuniteā in San Benito County, California. Bryan Lees (current lessee of the |  | | 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 |  | Barker, F., Wones, D.R., Sharp, W.N., Desborough, G.A. (1975) The Pikes Peak batholith, Colorado front range, and a model for the origin of the gabbroāanorthositeāsyeniteāpotassic granite suite. Precambrian Research, 2 (2) 97-160 doi:10.1016/0301-9268(75)90001-7 | Journal (article/letter/editorial) | | -- Printed in The Netherlands THE PIKES PEAK BATHOLITH, COLORADO FRONT RANGE, AND A MODEL FOR THE ORIGIN...N. and Desborough, G.A., 1975. The Pikes Peak batholith, Colorado Front Range, and a model for the origin...Precambrian Res., 2: 97--160. This study of the Pikes Peak batholith includes the mineralogy and petrology...are high. Fluorine ranges from 0.3 to 0.6%. The Pikes Peak intrusives are similar in mode of emplacement...Precambrian Pikes Peak batholith lies in the southern Front Range of Colorado, west of Colorado Springs and |  | | Report (issue) | | Denver, Colorado, USA Ā© 2011 by Lithographie, LLC P.O. Box 11613 ā¢ Denver, CO 80211 ā¢ 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 |  | | Journal (issue) | | Colorado Springs Mineralogical Society THE BULLETIN OF THE COLORADO SPRINGS MINERALOGICAL SOCIETY Published...Utah. After investing his money, he molded the Pikes Peak region into a tourist mecca by building the Broadmoor...social, and philanthropic communities of the Pikes Peak region. Join Steven Veatch as he shares Penrose...personalities. Steven Veatch is a member of the Colorado Springs Mineralogical Society, the Lake George...his cabin near Divide Colorado and on the shores of Duck Lake, Michigan. COLORADO SPRINGS MINERALOGICAL |  | | Journal (article/letter/editorial) | | PLUTON OF THE WAUSAU SYENITE COMPLEX, MARATHON COUNTY, WISCONSIN Alexander U. FALSTERĀ§ 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 NEāSW-trending... 2012). However, the South Platte pegmatites (Colorado) exhibit an astonishing REE concentration in the...occurrence of siderite in the anorogenic Pikes Peak batholith, in Colorado (Gross & Heinrich 1966). Calcite also |  | | Report (issue) | | Boulder Creek Granodiorite, south of Lake Granby, Colorado...................................... Table 6...(1954); 2. numerate values are obtained for F (f el sic-mafic ratio) and S (silica saturation ratio)...origin. THE F-S METHOD Concept and Rationale The f el sic-mafic ratio (F) and silica saturation ratio (S)...with average rock types of Nockolds (1954). The f el sic-mafic ratio (F) is defined as: F= Si02 + Na20...perceived that they show all gradations from very f el sic (composed of quartz and alkali feldspar) to very |  | | Report (issue) | | GOLD DEPOSITS OF THE CRIPPLE CREEK DISTRICT, COLORADO BY \V ALDEl\;IAR LINDGREN A:'\D FREDERIC!{ LESLIE...Granite Pikes---------------------------------------------------------Ā·-Ā·Ā·Ā·Ā·Ā·Ā·Ā·Ā·-Ā·Ā·Ā·Ā·Ā·Ā· Peak granite.... . . . . . . . . . . . . . . . . . . . . . . El Paso and C. K. & N. mines ..... ___ ..... __ ........._... . ..... ___ . _..... _..... _.. _...... . El Paso mine .. ___ . ___ . ___ . _. _____ ......... _...Rhyolite Mountain from summit of Bull Hill; B, Pikes Peak and the town of Gillett from the summit of Bull |  | Stark, J. T., Johnson, J. H., Behre, C. H. Jr., Powers, W. E., Howland, A. L., Gould, Don B. (1949, January) Geology and Origin of South Park, Colorado. GSA Memoir 33. Geological Society of America doi:10.1130/mem33 | Report (issue) | | Memoir 33 GEOLOGY AND ORIGIN OF SOUTH PARK, COLORADO BY J. T . STARK, J. H. JOHNSON, C. H. BEHRE,................. . ......................... . Pikes Peak granite . .............. ................ .....Volcanic bills and Denver fossils. Elk horn Upland, Pikes Peak granite, Antero formation, and Trump and \1/agontongue...Fipre ~P 1. 2. 3. 4. 5. 6. 7. 8. Map of central Colorado and South Park.... . . . . . . . . . . . . . ...pre-Pennsylvanian Paleozoic formations of the Mosquito Range, Colorado.... . . . .. .. .. . . . ... .. . . .. . .. . |  | | Report (issue) | | Series 30 Bibliography and Index of Colorado Geology, 1984-1989 Colorado Geological Survey Department of...Resources Denver, Colorado 1990 Information Series 30 Bibliography and Index of Colorado Geology, 1984-1989...Institute under contract to the Colorado Geological Survey Colorado Geological Survey Department of...of Natural Resources Denver, Colorado 1990 ii FOREWORD In recognition of the need to more effectively...published literature on the state's geology, the Colorado Geological Survey is pleased to release Information |
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