	*(1995) Isotopic geochronology of the Leadville 1 degree x 2 degrees Quadrangle, west-central Colorado; summary and discussion. Bulletin* Vol. 2104. US Geological Survey doi:10.3133/b2104**	Report (volume)
	of the Leadville 1°X2° quadrangle, west-central Colorado : summary and discussion I by Alan R. Wallace...Radioactive dating-Colorado-Leadville Region. 2. Geology, Stratigraphic. 3. Geology-Colorado-Leadville Region...geochronology samples, Leadville 1°X2 o quadrangle, Colorado. III IV CONTENTS FIGURES 1. 2. 3. 4. 5. 6...of the Leadville 1°X2° quadrangle, west-central Colorado........................ 2 Map showing major geologic...OF THE LEADVILLE 1°X2° QUADRANGLE, WEST-CENTRAL COLORADO-SUMMARY AND DISCUSSION By Alan R. Wallace ABSTRACT
	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)
	soccuron both sidesof the ColoradoPlateau (in Colorado,New Mexico, Arizona, Utah, and Nevada) and in...Introduction occurrencein a lava flow near Nathrop, Colorado, IN 1884 Whitman Crossdescribedtopaz, A12SiO4F2...porphyriticrhyolitedomeat Chalk Mountain, and garnet in samplesof lithophysalrhyolite lava Colorado,lessthan4 km westof...Crossreviewedthisand a similar 1959, the Spor Mountain beryllium depositswere discoveredin this same...Fluorine-rich extrusions(domesor flows)typically crustsof sanidine,tabular to prismatic,pink to red hexagonsof beryl
	*John, D.A. (1994) Field guide to Oligocene-Miocene ash-flows and source calderas in the Great Basin of Nevada. Open-File Report* Vol. 1994 (94-193) US Geological Survey doi:10.3133/ofr94193**	Report (issue)
	contemporaneous but better known San Juan volcanic field of Colorado, extrusions of lava flows are very minor in the...INDIAN PEAK ° CALDERA COMPLEX..MARYSVALE 1SANJUAN COLORADO , \| RHYOLITE-DACITE I__I ASH-FLOW TUFFS ANDESITIC...in the Great Basin and in areas surrounding the Colorado Plateaus (dotted line). Intermediate composition...plagioclase, quartz, biotite, hornblende, Fe-Ti oxides, sanidine, and titanite (sphene). Intercalated lenses of...Wilson are possibly 6-9 km thick. Drive down off mountain toward Pioche. 26.9 200.7 Turn left (south)
	*(1885) Contributions to the mineralogy of the Rocky Mountains. Bulletin* Vol. 20. US Geological Survey doi:10.3133/b20**	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
	(1985) Micro Mineral Crystals Catalog. Hatfield Goudey	Catalog/List
	Old No. l Headfnme. Whi ■ key Hlll Mine, Tuohnne County, CaUfomla (r■-,u. .SV•t- tor cr11•t•J 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
	Christiansen, E. H., Burt, D. M., Sheridan, M. F., Wilson, R. T. (1983) The petrogenesis of topaz rhyolites from the western United States. Contributions to Mineralogy and Petrology, 83 (1) 16-30 doi:10.1007/bf00373075	Journal (article/letter/editorial)
	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...devitrifled groundmasses. Magmatic phases include sanidine, quartz, oligoclase and Fe-rich biotite. Allanite...Grande rift (New Mexico and Colorado) and thus appear to surround the Colorado Plateau. Similar middle to
	*Pullman, Steven, Thomssen, Richard (1999) Nevada Mineral Locality Index. Rocks & Minerals, 74 (6) 370-379 doi:10.1080/00357529909605174*	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
	Arató, Róbert, Audétat, Andreas (2017) Vanadium magnetite–melt oxybarometry of natural, silicic magmas: a comparison of various oxybarometers and thermometers. Contributions to Mineralogy and Petrology, 172 (7) doi:10.1007/s00410-017-1369-6	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 “The Dyke”, Colorado. Notice the partly altered rims of the ilmenite...(plus by previous work on the Chalk Mountain rhyolite at Climax, Colorado; Audétat 2015), the problem of...NMNH 117462-1 Blackfoot Lava Field—USA; NMNH 116377-38a Nomlaki Tuff—USA), one by Sorin Silviu Udubasa (Oravita...vitrophyres (Inyo-Mono craters, Banco Bonito volcano—both USA), silicic tuffs (Winter Park, Smelter Knolls, Guaje
	*(1910) Analysis of rocks and minerals from the laboratory of the United States Geological Survey, 1880 to 1908. Bulletin* Vol. 419. US Geological Survey doi:10.3133/b419**	Report (volume)
	...................... 1. Rocks from Aroostook County..... ^..................'........... 2. Miscellaneous...1. Elliott County dike............................................... 2. Crittenden County dike...................................... 60 2. Sepulchre Mountain........................................... 62................................. 83 6. Castle Mountain district..................................................... 86 87 90 90 92 93 93 94 95 95 Colorado..............................................
	*(1961) Minerals of Colorado; a 100-year record. Bulletin* Vol. 1114. US Geological Survey doi:10.3133/b1114**	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
	*(1900) Analyses of rocks from the laboratory of the United States Geological survey 1880-1899. Bulletin* Vol. 168. US Geological Survey doi:10.3133/b168**	Report (volume)
	...................... 1. Eocks from Aroostook County I............................. 19 19 2. Litchfieldite...56 1. Elliott County dike........................................ 56 2. Crittenden County dike...................................... 87 2. Sepulchre Mountain ....................................... 3. Absaroka................................ 124 5. Castle Mountain district.................................... .................................. 134 135 137 Colorado ......................... ^..................
	*(1898) The educational series of rock specimens, collected and distributed by the United States Geological Survey. Bulletin* Vol. 150. US Geological Survey doi:10.3133/b150**	Report (volume)
	Arizona. II. Massive structure in diorite, Sliasta County, California.........:. III. Rhombohedral jointing................ IV. Columnar jointing, Watchung Mountain, Orange, New Jersey..... V. Petrographic microscope...filled with sand, from the Grand Canyon of the Colorado, Arizona................................ XIII... Thin sections of siliceous oolite from Center County, Pennsylvania, as seen under a microscope: A, in.... XX. Concretions of marcasite from Thatcher, Colorado................ XXI. Fossil trees, Yellowstone
	Spencer, Edmondson (1930) A contribution to the study of moonstone from Ceylon and other areas and of the stability-relations of the alkali-felspars. Mineralogical Magazine and Journal of the Mineralogical Society, 22 (130) 291-367 doi:10.1180/minmag.1930.22.130.01	Journal (article/letter/editorial)
	N. Winchell (31) has suggested that the terms sanidine and adularia be reserved for the high-temperature...angle 72 ~ 53' for a schillerized sanidine from the Chalk Mountain, Colorado. He concluded that the corresponding... it will be shown later that the Ragged Mountain ' sanidine ', which possesses alternating schiller zones...(31), the first separations would be into (A) sanidine, (B) barbierite. 327 MOONSTONE FROM CEYLON...alkali-felspars from other localities (Kandyl Burma, and Colorado) have been examined. These show a much wider range
	*(1897) Analyses of rocks, with a chapter on analytical methods, laboratory of the United States Geological survey 1880 to 1896. Bulletin* Vol. 148. US Geological Survey doi:10.3133/b148**	Report (volume)
	TheElliott County dike ...................................... 92 2. The Crittenden County dike.....................-........-...--. 117 2. Sepulcher Mountain .......................................... 120.................................. 4. The Castle Mountain district...........................'...-.. 5....Mountains..............................-------Colorado ................................................Pago. Igneous and crystalline rocks Continued. Colorado Continued. 8. The AVest Elk Mountains........
	Gomez, Ernest (1979) Geology of the south-central part of the New River Mesa Quadrangle, Cave Creek area, Maricopa County, Arizona. Open-File Report Vol. 1979 (79-1312) US Geological Survey doi:10.3133/ofr791312	Report (issue)
	RIVER MESA QUADRANGLE, CAVE CREEK AREA, MARICOPA COUNTY, ARIZONA By Ernest Gomez Open-File Report 79-1312...information bearing on the Cenozoic development of the mountain and desert regions of Arizona. The area contains...Hickey Formation. Topographic development of the mountain-desert region boundary occurred with collapse........ 15 Andesite. .................... 19 Chalk Canyon Formation. ............. 21 Introduction........ 113 Andesite. ..................... t. Chalk Canyon Formation. .............. 115 118 Basal
	*(1904) Analyses of rocks from the laboratory of the United States Geological Survey, 1880-1903. Bulletin* Vol. 228. US Geological Survey doi:10.3133/b228**	Report (volume)
	crystalline rocks Maine 1. Rocks from Aroostook County 2. Litchtieldite and associated minerals New lIampshire...Carolina (ieorgia Kentucky 1. Elliott County (like 2. Crittenden County dike Tennessee Missouri Arkansas Texas...A hsaroka Range 1. Electric Peak 2. Sepulchre Mountain 3. Absaroka Range First. Crandall Basin Second...Crazy Mountains 5. Little Belt Mountains 6. Castle Mountain district 7. Highwood Mountains 8. Little Rock...Bitterroot Range 12. Marysville district Idaho Colorado 1. Denver Basin 2. Pike's Peak district Granite
	*(1915) Analyses of rocks and minerals from the laboratory of the United States Geological Survey, 1880 to 1914. Bulletin* Vol. 591. US Geological Survey doi:10.3133/b591**	Report (volume)
	crystalline rocks Maine 1. Rocks from Aroostook 'County 2. Miscellaneous rocks5 v New Hampshire 5 Vermont...Carolina Georgia Kentucky 1.. Elliott County dike 2. Crittenden County dike Tennessee Missouri Arkansas Oklahoma...the Absaroka Range 1. Electric Peak 2. Sepulchre Mountain 3. Absaroka Range 5 Crandall Basin Sunlight intrusives...Mountains 4. Little Belt Mountains5 5. Castle Mountain district 6. Highwood Mountains5 7. Bearpaw Mountains5...Analyses of igneous and crystalline rocks-Continued. Colorado-Continued.5 18. San Cristobal quadrangle 5 19
	*Lincoln, Francis Church (1907) Magmatic emanations. Economic Geology, 2 (3) 258-274 doi:10.2113/gsecongeo.2.3.258*	Journal (article/letter/editorial)
	In drusesin the nevadite of Chalk Mountain, Colorado, Crossa found sanidine,quartz, biotite, a few ore...minerals of lithophysesin rhyolite from Nathrop, Colorado,Cross• found a similar seriesof minerals. But...But in addition to the minerals found at Chalk Mountain, spessartite was discoveredand some of the ore grains
	*Castor, Stephen B., Ferdock, Gregory C. (2004) Minerals of Nevada. Special Publication* 31. Nevada Bureau of Mines and Geology**	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
	*McLaughlin, R. (1981) Research in the Geysers-Clear Lake geothermal area, Northern California. Professional Paper* 1141. US Geological Survey doi:10.3133/pp1141**	Report (issue)
	flat-topped peak on the central horizon is Cobb Mountain, a 1.1-million-year-old silicic volcanic center...and ore controls at the Culver-Baer mine, Sonoma County, California, by Eugene V. Ciancanelli, Cascadia...Cache, Lower Lake, and Kelseyville Formations, Lake County, Calif. FIGURE Page FIGURE 115. Photographs...vent areas for rhyolite and dacite that cap Cobb Mountain may provide conduits that allow deep circulation...Franciscan chert interbedded with from the South Fork Mountain Schist of the eastern graywacke and greenstone
	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).
	Soufi, Mohamed (2021) Origin and physical-chemical control of topaz crystallization in felsic igneous rocks: Contrasted effect of temperature on its OH–F substitution. Earth-Science Reviews, 213. 103467pp. doi:10.1016/j.earscirev.2020.103467	Journal (article/letter/editorial)
	2014); (C) Topaz at the Honeycomb Hills rhyolite, USA, as a primary phenocryst phase including biotite...Breadpan topazite dike, in the Flying W Ranch area, USA (Kortemeier and Burt, 1988), composed of larger anhedral...u. F) in topaz from the Thomas na Range, Utah, USA. At Qiguling, in the Qitianling tin district, China...data : I- Topaz rhyolite of Thomas Range, Utah, USA (Ottolini et al., 2000); II- Topaz rhyolite at Qiguling...Topaz rhoylite of the Honeycomb Hills, 1 34-m USA 19.6, 19.9 Turley and Nash (1980) 605 Turley
	Steigerwald, Celia H., Mutschler, Felix E., Ludington, Steve (1983) GRANNY, a data bank of chemical analyses of Laramide and younger high-silica rhyolites and granites from Colorado and north-central New Mexico. Open-File Report Vol. 1983 (83-516) US Geological Survey doi:10.3133/ofr83516	Report (issue)
	younger h1gh-s1Uca rhyoMtes and granites from Colorado and north-central New Mexico by 1X Celia H....younger high-silica rhyolites and granites from Colorado and north-central New Wexico Celia H. Steigerwald...younger high-silica rhyolites and granites from Colorado* and north-central Ney Mexico* The data were compiled...the many granite molybdenite system prospects in Colorado* We then decided to broaden the data bank to include...younger high-silica rhyolites and granites in Colorado for which chemical data were available* Our aim
	CHRISTIANSEN, E, HAAPALA, I, HART, G (2007) Are Cenozoic topaz rhyolites the erupted equivalents of Proterozoic rapakivi granites? Examples from the western United States and Finland. Lithos, 97 (1) 219-246 doi:10.1016/j.lithos.2007.01.010	Journal (article/letter/editorial)
	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...crystallized under subsolvus conditions, and have quartz, sanidine, and Naplagioclase as the principal phenocrysts...Rio Grande rift and thus appear to surround the Colorado Plateau. Nearly all topaz rhyolites lie east of...of two different ages included in the Steamboat Mountain Formation and the Blawn Formation. These rhyolites
	*Castor, Stephen B., Ferdock, Gregory C. (2004) Minerals of Nevada. Special Publication* 31. Nevada Bureau of Mines and Geology**	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

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Sanidine from Chalk Mountain, Summit County, Colorado, USA

Sanidine from
Chalk Mountain, Summit County, Colorado, USA