 | Burt, Donald M., Sheridan, Michael F., Bikun, James V., Christiansen, Eric H. (1982) Topaz rhyolites; distribution, origin, and significance for exploration. Economic Geology, 77 (8) 1818-1836 doi:10.2113/gsecongeo.77.8.1818 | Journal (article/letter/editorial) | | ArizonaState University,Tempe,Arizona85287 Abstract Topaz rhyolitesare fluorine-richalkaline siliciclavasand...shallowintrusivesthat are characterizedby the presenceof topaz(A12SiO4F2) in gascavities,commonlyassociated with...soccuron both sidesof the ColoradoPlateau (in Colorado,New Mexico, Arizona, Utah, and Nevada) and in...(carbonaterocks) and water tableswere presumablyhigh. Most topaz rhyolite lavasare not associated wth volcanogenicmineralization...nonreactive,and water tablescould have been low. Topaz rhyolitesof both the productiveand nonproductivetype |  | | Catalog/List | | Old No. l Headfnme. Whi â key Hlll Mine, Tuohnne County, CaUfomla (râ -,u. .SVâąt- tor cr11âątâąJ lJaed gold...feldspar. 784 ADAMITE, Moha\'.1k Mine, San Bernardino County, r.alifornia. Group o f colorless to light green...chalcophanite crystals on \/ad. 104 ADAMITE, Quartz Mountain, Nevada. Pale blue to colorless nearly equant...785 ADAMITE (CUPRIAN),MohawkMine, San Bernardino County, California. Nicely spaced transparent jade green...55:1447 (1970). 911 ALBITE,Clear Creek, San Benito County, California. White semi-transparent crystals on |  | | Report (issue) | | Bulletin 846 C THE CLIMAX MOLYBDENUM DEPOSIT COLORADO BY B. S. BUTLER and J. W. VANDERWILT WITH A...Orthoclase replacing muscovite; B, Pyrite vein with topaz gangue _ _ _ ________________________________________..._____ 224 IV THE CLIMAX MOLYBDENUM DEPOSIT, COLORADO By B. S. BUTLER and JOHN W. VANDERWILT ABSTRACT...metal-mining operation in the history of mining in Colorado has been developed at Climax, as a result of the...chalcopyrite, dark-brown sphalerite, hubnerite, topaz, quartz, and fluorite, cut the highly altered central |  | | Journal (article/letter/editorial) | | 83:16-30 9 Springer-Verlag 1983 The Petrogenesis of Topaz Rhyolites from the Western United States E.H. Christiansen...Arizona 85287, USA 1 Department of Geology, University of Iowa, Iowa City, Iowa 52242, USA z Applied Geologic...Geologic Studies, Englewood, Colorado 80110, USA ,Abstract. High-silica topaz-bearing rhyolites of Cenozoic...Cenozoic age are widely distributed across the western USA and Mexico. They are characteristically enriched...elements (e.g. Li, Rb, Cs, U, Th, Be). In addition to topaz, the rhyolites contain garnet, bixbyite, pseudobrookite |  | | Book (edition) | | and often gems can be found. valuable For the mountain ranges and level for the ist to States contain...6. Orthoclase 1. Talc 2. Gypsum 7. Quartz Topaz Corundum 10. Diamond 3. Colcite 8. 4. Fluorite.../^^ RUTILE SAPPHIRE 1^ TOURMALINE CRYSTALS TOPAZ CRYSTALS 4 GEM hunter's GUIDE (Cross-seaion at...weakness in the molecular structure of the mineral. Topaz, for instance, cleaves readily along the short direction...cation (moss-like), will be frequently misled All topaz crystal And is such a chameleon color, or jasper) |  | | Report (volume) | | Cross, with a Geological Sketch of Buffalo Peaks, Colorado, by S. F. Emmons. 1883. 8°. 42pp. 2 pi. Price...meridian of 76° 30', from Tompkins County, New York, to Bradford County, Pennsylvania, by Henry S.Williams...cents. 16. On the higher Devonian Faunas of Ontario County, New York, by J. M. Clarke. 1885. 8°. 86 pp. 3...I. Minerals from the basalt of Table Mountain,' Golden, Colorado, by Whitman Cross and W. F. Hillebrand.........J................. Description of Table Mountain .......................................... Manner |  | | Report (volume) | | octahedron. Ready cleavage, however, can be a handicap; topaz and kunzite, for example, are difficult to cut into...Apatite . 6. 7. 8. 9. 10. Orthoclase Quartz Topaz Corundum Diamond The numbers preceding each mineral...to lapis lazuli and other blue stones; the term "topaz," to all yellow stones; and 206 CONTRIBUTIONS...some of the tints rarely found in nature. Yellow topaz from Brazil can be heated carefully and cooled to...permanent pink, resembling the rare, natural pink topaz. In a similar manner a colored zircon may be heat-treated |  | | Journal (article/letter/editorial) | | Pre-proof Origin and physical-chemical control of topaz crystallization in felsic igneous rocks: Contrasted...Soufi, Origin and physical-chemical control of topaz crystallization in felsic igneous rocks: Contrasted...Pre-proof Origin and physical-chemical control of topaz crystallization in felsic igneous rocks: contrasted...In highly evolved F-rich felsic igneous rocks, topaz Al2SiO4(F,OH)2 forms in different genetic re stages:...deciphering the origin of OHâF variations in topaz. We conclude that topaz compositions in magmatic and post-magmatic |  | | Book | | .3 COLORADO. of COLORADO. J. S. l GEORGETOWN, COLO. GEORGETOWN COURIER PRINT. 1887. 3 Bancroft...From a mineralogical point of view the wealth of Colorado exceeds that of In the metallic minerals almost...to in the following pages Proceedings of the Colorado Scientific Society. Proceedings of the Academy...the U. S. Geological Survey. J. GEORGETOWN, COLORADO, January, 1887. S. RANDALL. : MINERALS...gravel of streams and in veins. The veins of Gilpin County are especially noteworthy for the amount of gold |  | | 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) | | Perloff. Figure 2: Meta-torbernite, Chalk Mountain, Mitchell County, North Carolina. RICHARD D. GREEN...with a few common sulfides. The area near Gilpin, Colorado, and some of the veins in Corn wall, England...lepidolite, columbite-tantalite, spodumene, amblygonite, topaz, triphylitelithiophilite, beryl, and much albite...(right): Uraninite, Deep Creek, Bayson City, Swain County, North Carolina. Photo by Lou Perloff. 248 ROCKS...uraninite. A good example of this type deposit is the Colorado Plateau occurrence. Secondary Uranium-Bearing |  | | Journal (article/letter/editorial) | | ama, Clark County. Walt Lombard0 specimen, Jeff Scovil photo. Churchill County Chalk Mountain District...District Chalk Mountain mine: calcite, cerussite, chlorargyrite, descloizite, galena, hemimorphite, leadhillite...Quartz, 14.2 cm across, Newbeny Mountains,Clark County. Steve Scott specimen, Jeff Scovil photo. Figure...Churchill County. Figure 2 (bottom). Wulfenite, 1.1 mm high, Chalk Mountain, Churchill County. Dan Behnke...Lakes: gaylussite, mirabilite, natron, trona Table Mountain (Bolivia, Cottonwood Canyon) District Lovelock |  | 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) | | selected Laramide-Tertiary granitoid stocks in the Colorado Mineral Belt and their bearing on the origin of...Geology, University of Vermont, Burlington, VT 05405, USA 2 Branch of Isotope Geology, U.S. Geological Survey...Denver, CO 80225, USA Abstract. Quartz phenocrysts from 31 granitoid stocks in the Colorado Mineral Belt...without meteoric water influx. Introduction The Colorado Mineral Belt (COMB), a site of extensive Late...Survey, M.S. 905, Federal Center, Denver, CO 80225, USA Offprint requests to: J.L. Hannah * Present address: |  | | Book | | tourmaline, magnetite, zircon, gold, platinum, topaz, beryl, ruby and sapphire. One important rock in...desires. Sometimes the talus slopes at the base of a mountain contain rich indications of a dike or sill above...famous was the single beryl stone found in Oxford County in Maine that weighed 18 tons and was 18 feet in...stones vary in their permeability or hardness. Chalk rubs off on anything (unfortunately for college...Fluorite Apatite 6. 7. 8. 9. 10. Feldspar Quartz Topaz Corundum Diamond (hardest) This is a very old scale |  | | Report (volume) | | ------------------------------------------------------- 51 Topaz --.----_..----.--...---.--...-._.---.......-_.....From the Silver King mine, Calico, San Bernardino County, Cal. Specific gravity, 6:28. Analysis by W. H...19 LOLLINGITE. From .Teocalli Mountain, Brush Creek, Gunnison County, Colo. Specific gravity, 7.400...described in Proc. Colorado Sci. Soc., vol. 3, pt. 1, p. 46. From the Rose mine, Grant County, N". Mex. Specific...impurities. From the Missouri mine, Halls Valley, Park County, Colo. Analyses, by Hillebrand, of three different |  | | Report (issue) | | 31 University of Nevada Press, Reno, Nevada 89557 USA Copyright © 2004 by University of Nevada Press Photographs... Majuba Hill Mine, Antelope district, Pershing County. N. Prenn collection. Photograph by J. Scovil....Goodsprings (Yellow Pine) Mining District, Clark County John C. Kepper 91 References 467 Contributors...Pyromorphite after Galena with Conichalcite Gold, Round Mountain Mine Quartz, Lovelock area Acanthite Grossular...Almandine-Spessartine Annabergite Gypsum Quartz, Petersen Mountain Heterogenite Quartz (amethyst), faceted Arsenolite |  | | Journal (article/letter/editorial) | | 246 www.elsevier.com/locate/lithos Are Cenozoic topaz rhyolites the erupted equivalents of Proterozoic...Sciences, Brigham Young University, Provo, Utah 84602, USA b Department of Geology, P.O. Box 64, FIN-00014,...Washington State University, Pullman, WA 99164-2812, USA Received 6 December 2005; accepted 25 January 2007...Available online 2 February 2007 Abstract Eruptions of topaz rhyolites are a distinctive part of the late Cenozoic...them apart from S-type silicic magmas. Instead, topaz rhyolites have the major and trace element, mineralogic |  | | Journal (article/letter/editorial) | | a GeolasPro 193 nm ArF Excimer Laser (Coherent, USA) attached to an Elan DRC-e (Perkin Contrib Mineral...magnetite microphenocryst (mgt) from âThe Dykeâ, Colorado. Notice the partly altered rims of the ilmenite...(plus by previous work on the Chalk Mountain rhyolite at Climax, Colorado; AudĂ©tat 2015), the problem of...NMNH 117462-1 Blackfoot Lava FieldâUSA; NMNH 116377-38a Nomlaki TuffâUSA), one by Sorin Silviu Udubasa (Oravita...vitrophyres (Inyo-Mono craters, Banco Bonito volcanoâboth USA), silicic tuffs (Winter Park, Smelter Knolls, Guaje |  | | Journal (issue) | | and D.D. Hogarth Diamond collecting in northern Colorado ............................................205...Collins The Lake Clear-Kuehl Lake area, Renfrew County, Ontario.........................................Endlichite and descloizite from the Chalk Mountain mine, Churchill County, Nevada .......................... Bostwick Mercury amidonitrate crystals from Colorado ....................................233 Printed...nepheline gneiss are currently being worked at Blue Mountain, near Peter borough, as a raw material for the |  | | Book (volume) | | Kobuk jade locality. Descriptions of San Diego County, California, gemstones and the mines in which they...the generous assistance of many residents of that county. My special thanks are extended to Elbert H. McMacken...GEMSTONES Diamond, Corundum (Ruby and Sapphire), Beryl, Topaz, Opal. IMPORTANT GEMSTONES The Feldspar Group, Spodumene...crystal . Four topaz crystals . Drawing of New Hampshire topaz crystal . A cut topaz . The Little Three...Three Mine . Drawing of Ramona Topaz crystal . View of Virgin Valley . An opal digging XI List of Illustrations |  | | Book | | 193-256 137-208 129-192 209-264 193-256 [ [ COLORADO-Ill] 177-256 121-184 89-168 1-120 1-88 [ ...177-256 185-280 169-248 [ 425-528 337--400 COLORADO-II] 321--400 337--400 ARIZONA-Ill] 337--400...69-132 65-128 1-64 11 / 1980 20 I 1989 [ COLORADO-I] [ 289-352 385-448 [ AUSTRALlA] 353-504...Iaria from the Howard-Montgomery quarry, Howard County, Maryland (by J. S. White) 25:53-54 AFGHANISTAN...ALABAMA Iron phosphate mineral locality at Indian Mountain, Alabama (by H. Harwood) 5:241-244 Iron-manganese | | | Report (issue) | | 3i University of Nevada Press, Reno, Nevada 89557 USA Copyright© 2004 by Uni versity of Nevada Press Photographs... Majuba Hill Mine, Antelope district, Pershing County. N. Prenn coJlection. Photograph by J. Scovil....Goodsprings (Yellow Pine) Mining District, Clark County John C. Kepper MINERAL CATALOG 91 121 Gregory...Gold, Humboldt Mountain Gold, Mexican Mine Gold, Majuba Placer Gold, Round Mountain Mine Grossular,...Quartz (amethyst) and Calcite Quartz, Petersen Mountain Quartz (amethyst), faceted Quartz with Spessartine |  | | Report (volume) | | A. F. Rogers, Stanford University, Palo Alto. Colorado.........Prof. R. D. George, Boulder. Connecticut...See Bauxite and Hallpysite. Asbestos. Tallapoosa County, with corundum deposits near Dudleyville; not found...commercial quantity or quality. Asphalt. Colbert County, small quantity has been shipped from near Leighton;...following localities: Bibb County, Pratts Ferry; Calhoun County, near Tampa; Clay County, T. 20, Pv. 7 E.; Jefferson...Jefferson County, at Elyton; Lee County, at Chewacla lime works; St. Clair County, at Gfeensport; Shelby |  | | Journal (issue) | | New York. Almandite has been found at Salida , Colorado, in large dodecahedral crystals superficially...(a) Simple Ca - Fe garnet, including (aa) Topaz olite, topaz yellowor pale green ,sometimes showing faces...ever found. The fine red spessartites found at Chalk Mountain, Chaffee Co. , Colo., and Ruby Valley, Elks...are found in New Mexico, Arizona, and Southern Colorado, where they are often called rubies. In the western...western part of Arizona, on both sides of the Colorado river, they are found on the ant hills and near |
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