 | | Journal (article/letter/editorial) | | BASE-METAL SULFIDE OCCURRENCES, COLORADO: A RE-EVALUATION OF GAHNITE COMPOSITION AS A GUIDE IN EXPLORATION...metamorphosed to the amphibolite and granulite facies in Colorado, many of which are spatially associated with Mg-rich...massive-sulfide deposits in Mg-rich alteration zones in Colorado, causes a marked enrichment in the spinel component...deposits. Keywords: gahnite, exploration guide, massive sulfides, magnesium enrichment, Colorado. SOMMAIRE Le...treize gisements de sulfures protérozoïques au Colorado qui ont atteint le faciès amphibolite ou granulite |  | | Report (volume) | | Zinc-Copper-Lead Sulfides and Zinc Spinel (Gahnite) in Colorado U,S. GEOLOGICAL SURVEY BULLETIN 1550 , ...Zinc-Copper-Lead Sulfides and Zinc Spinel (Gahnite) in Colorado By DOUGLAS M. SHERIDAN and WILLIAM H. RAYMOND...zinc-copper-lead sulfides and zinc spinel (gahnite) in Colorado. (Geological Survey bulletin ; 1550) Bibliography:...Geology, Stratigraphic-Precambrian. 3. Geology-Colorado. I. Raymond, William H. II. Title. III. Series...amphibolite facies Deposits in the vicinity of Salida Gahnite and its significance . . . Economic potential |  | | Report (issue) | | Oxidized Zinc Deposits of the United States Part 3. Colorado By ALLEN V. HEYL GEOLOGICAL SURVEY BULLETIN...deposits and the resources of oxidized zin.c ores in Colorado UNITED STATES· GOVERNMENT PRINTING OFFICE, WASHINGTON...19180xidized zinc deposits of the United States. Part 3. Colorado. Washington, U.S. Govt. Print. Off., 1964. vi...Bibliography : p. 88-91. 1. Zinc ores-Colorado. 2. Zinc mines and mining-Colorado. I. Title. (Series) For sale...__ ___ __ __ __ __ __ _____ Kokomo (Ten ~ile) district _______ ._________________________ Breckenridge |  | | Report (issue) | | Part 1. General geology. Part 2. Utah. Part 3. Colorado. 0 Oxidized Zinc Deposits of the United States...gold-bearing oxidized zinc and zinc-lead ores in Colorado, Utah, Nevada, and California______________ 3...deposits in the Eastern and Central States, and in Colorado and Utah_______________ m A-2 7 22 OXIDIZED...~issouri Texas•-----------------------------------Colorado _________________________________ _ New ~exico...Alaska.. a Includes 550 tons from Davis, Murray County, Okla. 'Production to 1934 only. PART 1. 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 |  | | Report (issue) | | IN CHAFFEE, FREMONT, AND JEFFERSON COUNTIES, COIO. By WALDEMAR LINDGREN. INTRODUCTION. Colorado is not...contributed to this output, but only two Lake (Leadville district) and San Juan yielded notable amounts. The Leadville...Juan County slightly exceeded 1,500,000 pounds. The copper ores, properly so called, of Colorado comprised...which one-half came from San Juan County. It may be said that Colorado does not contain a single copper...prominence. Of the counties mentioned in the title Chaffee produced 349,466 pounds of cop'per from 6,249 tons |  | | Journal (article/letter/editorial) | | of COLORADO ED RAINES Geology Museum Colorado School of Mines 1310 Maple Street Golden, Colorado 80401...Figure 1. Camp Bird mine, level 2, Sneffels district, Ouray County. Raines-Pettem collection, photographer...photographer unknown. B etween 1868 and 1922, Colorado produced almost 260 million pounds of copper. Nearly 100...from the Leadville district, with another 50 million pounds mined in San Juan County (Henderson 1926).... During the twentieth century, the Gilman district surpassed Leadville in total copper production with |  | | Journal (article/letter/editorial) | | felsic dikes inferred from the composition of gahnite in two new occurrences, Pala Chief and Elizabeth...Abstract We report the occurrence and composition of gahnite ([Zn,Fe,Mg,Mn]Al2O4) in aplites of the Pala Chief...Elizabeth R layered pegmatite-aplite dikes, Pala District, California, and the significance for felsic melt...Accessory gahnite occurs as extremely fine-grained (50–250 μm) green to bluish-green crystals. Gahnite compositions...Ghn83.5–90.9Hc8.7–15Spl0–1.4. Zinc contents in gahnite are high (36.7–39.5 wt.% ZnO for Pala Chief, 37 |  | | Journal (article/letter/editorial) | | MINERAL COLLECTING BY CAMPER IN COLORADO By LAWRENCE AND HARRIETTE SCHOPPEE 9 Greenbrier St., Springfield...investigating such a claim? We took our Camper to Colorado and now that state rivals Canada in our list of...campgrounds are available, and many new sites in Colorado are being opened every year. Our sleeping bags...described in Professor Richard M. Pearl's book, "Colorado Gem Trails and Mineral Guide." As in any other...before starting to collect in Colorado. Traveling from Massachusetts to Colorado is a trip in itself but don't |  | | Book (edition) | | — _ ; COLORADO GEM TRAILS AND MINERAL GUIDE ! ■ : ' BOOKS BY RICHARD M. PEARL Colorado Gem Trails...Trails and Mineral Guide Colorado Rocks, Minerals, Fossils America’s Mountain: Pikes Peak and the Pikes...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 |  | 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). |  | Heimann, A., Spry, P. G., Teale, G. S., Jacobson, C. E. (2006) CORONAS, SYMPLECTITIC TEXTURES, AND REACTIONS INVOLVING ALUMINOUS MINERALS IN GEDRITE - CORDIERITE - GARNET GNEISS FROM EVERGREEN, FRONT RANGE, COLORADO. The Canadian Mineralogist, 44 (5) 1025-1044 doi:10.2113/gscanmin.44.5.1025 | Journal (article/letter/editorial) | | – CORDIERITE – GARNET GNEISS FROM EVERGREEN, FRONT RANGE, COLORADO ADRIANA HEIMANN§ AND PAUL G. SPRY...metamorphosed to the upper amphibolite facies near Evergreen, Colorado, are interlayered with sillimanite – biotite...zincian hercynite, corona, symplectite, Evergreen, Front Range, Colorado. SOMMAIRE Des gneiss à gédrite –...au faciès amphibolite supérieur près de Evergreen, au Colorado, sont interlités avec des gneiss à sillimanite...zincifère, couronne, symplectite, Evergreen, Front Range, Colorado. INTRODUCTION Gedrite – cordierite |  | | Journal (issue) | | Uzbekistan; and the Emma Mine, Little Cottonwood District, Salt Lake Co., Utah. In most locations, tungstenite...News, P.O. Box 2043, Coeur d'Alene, ID 83816-2043 USA Phone: 208-664-2448 • 3 E-mail: lream@comtch.iea...V anadiun1 l\'line, l\fagnet Cove, Hot Springs County, Arkansas is Reclaimed and Collecting Ceases...the day that open-pit mining would reveal its expected buried treasures. Mining by Union Carbide for vanadium...a lifetime. There was always hope that renewed mining would hit the mineral bonanza but now that hope |  | | Journal (issue) | | Park County, Colorado Martin Jensen Collectors Edge Minerals, Inc. P.O. Box 1169 Golden, Colorado 80401...(EDS) at the facilities of the Colorado School of Mines in Golden, Colorado. For the original, comprehensive...along this structure at the elevation of the main mining level proved the existence of both vuggy conditions...of the greenockite on pyrite were exposed during mining of the "Watercourse vein" over the next six months...12th10to 5 ManinZinnExpositions, P.O.Box999,Evergreen, CO80437--0999, Fax:(303)674-2384, Email:mz0955@aol |  | | 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...PEARL Exploring Rocks, Minerals, Fossils in Colorado America's Mountain: Pikes Peak and the Pikes Peak...Atlas of Colorado American Gem Trails Nature As Sculptor: A Geologic Interpretation of Colorado . Scenery |  | | 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? ......................................339 by M. I. Jacobson The San Juan Mountains of Colorado ..................................349 by J. A...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 |  | | Book (volume) | | ...........................................59 Colorado ...............................................................548 Table of Maps Page Alabama County Map ...................................................................................4 Alaska County and Stream Map ..................................Co. Mining Districts ............................................................22 Arizona County Map.........................23 Arizona – Cochise Co. Mining Districts .................................... |  | | Report (issue) | | Basement in Colorado GEOLOGIC A I, Rock Units of the Precambrian Basement in Colorado By OGDEN TWETO...TWETO GEOLOGY OF THE PRECAMBRIAN BASEMENT IN COLORADO U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1321-A...igneous rocks in outcrop and the buried basement in Colorado UNITED STATES GOVERNMENT PRINTING OFFICE...1912-1983 Rock units of the Precambrian basement in Colorado. (Geological Survey Professional Paper ; 1321-A)...Geology, Stratigraphic Pre-Cambrian. 2. Geology Colorado. QE653.T9 1986 551.7'1'09788 I. Title. For sale |  | | Journal (issue) | | Cooper Nottingham, England Anthony R. Kampf L.A. County Mus. of Nat. Hist. Los Angeles, CA Joseph A. Mandarino...Mandarino Famous mineral localities: The Annaberg District, Lower A u stria ...............................them a call at 972-540-6999 and order your copy. COLORADO FOSSIL EXPO Denver Merchandise Mart • Mart Plaza...Martin Zinn Expositions • P.O. Box 999 • Evergreen, Colorado 80437-0999 • Fax (303) 674-2384 162 The...OCCURRENCES Iron Monarch open pit, Australia Namibite has been recorded from the Iron Monarch open pit, South |  | | 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 |  | | Journal (issue) | | Collector's Notebook: Moat Mountain, Albany, Carroll County, Hew Hampshire-2000 Art Smith 9118 Concho Street...the Jersey Gardens Mall in Eliza- beth, Union County, New Jersey which he thought was a blue calcite...photographs. from gem crystal s 10 cut gems with many mining a nd locality photographs. Most of the photographs...the geology. minera logy/ crystollography. and mining of any ge mstone. but you wi ll find the bas ic...mineral history enthusiast. $24 .00 per year in USA $30.00 per year elsewhere Matrix Publishing Co mpany |  | | Report (edition) | | Buckfield, Maine. Mined in 1996 by Holden !Jrothers Mining and currently in the Jim Mann collection. Photo...I 900 ' s, showing Loren Merrill 's tourmaline mining operation at Mount Mica. Table of Contents CHAPTER...much information on collecting sites in Oxford County. Numerous other collectors of Maine minerals also...State Museum), Ronald Holden, Jr. (Holden Brothers Mining), Gary Hoyle (Maine State Museum), Duane Leavitt...Fisheries and Wildlife, Phillip McCrillis (Plumbago Mining Corporation), Jane Perham, John Raymond, and Neil |  | | Journal (article/letter/editorial) | | The Quarries and Minerals of the Dayton Road District SOUTH GLASTONBURY, CONNECTICUT JOHN H. BETTS 215...northernmost in the Middletown-Portland pegmatite district (fig. 1). They are in South Glastonbury, about... and the Howe No. 4 quarry on the north. This district includes one of the largest quarries of the entire...entire Middletown-Portland quarrying district, the Howe No. John H. Betts, a mineral collector/dealeK...exact identification of the quarries in this mining district is extremely difficult because many were owned |  | | Book (volume) | | Dahlonega Co. and Rabum Co., and the McDuffie County Belt extending through portions of McDuffie, Warren...Sphalerite. BALDWIN COUNTY MILLEDGEVILLE, at state farmjasper. BANKS COUNTY COMMERCE, along Hwy. 59...along adjoining Co. linerock crystal. BARROW COUNTY WINDER, along rd. to Jefferson and 1½ mi. inside...Guide for Rock Hounds in the United States BARTOW COUNTY AREA, Saltpeter Cave, as floatjasper. CARTERSVILLE:...agate, (banded, various colors), jasper. BIBB COUNTY MACON: at Holton Quarry, 7½ mi. NWagate; N |  | | Book (volume) | | ...........................................47 Colorado ................................................rights, so remember you were told. If in doubt, a county map will tell you who the legal owner is. Good...gemmy qualities for cutting and polishing. AUTAUGA COUNTY PRATTVILLE, N. 6 mi., and just E of the Birmingham...were well known to prehistoric Indians.) BARBOUR COUNTY BAKER HILL, SE 1 mi. : 1 in a deep ravine, as a...deep red to variegated⎯ocher. BIBB COUNTY GENERAL AREA: c county gravel pits along the Cahaba R.⎯gemmy |
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