 | | Journal (article/letter/editorial) | | Recent Collecting Activity in SAN JUAN COUNTY, COLORADO B A R B A R A and J O H N M U N T Y A N 6978...6978 Wapiti Court Boulder, Colorado 80301 Photographs by the authors; specimens from the authors' collection...material has been obtained from a number of San Juan County mines and prospects during the last decade...almost ceased. COLORADO S A N J U A N C O U N T Y L I E S in southwestern Colorado. Some of the state's...vicinity of Silverton, the principal town in the county. The American Tunnel, located just north of town |  | | Report (volume) | | it helpful to refer to Survey Bulletin 507, "The mining districts of the western United States," and to...exhausted by mining or quarrying. Deposits of minerals of wide distribution, such as quartz and calcite...because they occur in sufficient quantity to warrant mining for their usual products but because they furnish...William H. Storms, San Francisco. Prof. A. F. Rogers, Stanford University, Palo Alto. Colorado.........Prof...See Bauxite and Hallpysite. Asbestos. Tallapoosa County, with corundum deposits near Dudleyville; not found |  | | Report (volume) | | Geological Survey office, Room 724, Appraisers Building, San Francisco, Calif. SL Geological Survey office, Room...of the Shinarump No. 1 uranium mine, Seven Mile Canyon area, Grand County, Utah: TEI-287, Jan. 11, 1954...Results of exploration at the Old Leyden coal mine, Jefferson County, Colo.: TEM-292, Mar. 30, 1953. D, GJ....N., The pegmatites of the Errington-Thiel mine, Elko County, Nevada: TEI-71, Dec. 28, 1949. Office of...Ridge, and West End claims near Clancy, Jefferson County, Mont.: TEM-31, Oct. 19, 1951. D, SL, T. (332, |  | | Book (edition) | | YEAR 1687"—DAVID T. DAY, CHIEF OF THE DIVISION OF MINING STATISTICS AND TECHNOLOGY WASHINGTON GOVERNMENT...and consump tion, or better and cheaper means of mining, extraction, and convey ance to market, may in...correspondence has been carried on with geologists, mining engineers, and other local authorities, and various...mmed at Broken Arrow aud Trout creek, in Sc. Clair county. The strata in this field are more faulted und...prong of Canoe creek, in St. Clair county, to Ha\sop creek, in Bibb county, a distance of 60 miles. Down to |  | | Report (issue) | | Selected Sites in the Upper Animas River Watershed, Southwestern Colorado, 1997-99 Open-File Report 00-53...Selected Sites in the Upper Animas River Watershed, Southwestern Colorado, 1997-99 By M. Alisa Mast, Jonathan...GEOLOGICAL SURVEY Open-File Report 00-53 Denver, Colorado 2000 U.S. DEPARTMENT OF THE INTERIOR BRUCE BABBITT...Copies of this report can be purchased from: District Chief U.S. Geological Survey Box25046, Mail Stop...attached to inside back cover] 1. Map of upper Animas River watershed and locations of water-quality |  | | Report (volume) | | ............................................. Colorado........................................................................................ 102 District of Columbia ....................................to refer to Geological Survey Bulletin 507, "The mining districts of the western United States," and to...exhausted by mining or quarrying. Deposits of minerals that are widely distributed, such as quartz and calcite...because they occur in sufficient quantity to warrant mining for their usual products, but because they furnish |  | | Book (edition) | | gem stones mon dull are as hard or harder than quartz, a com- mineral everywhere present as dust which...Hardness Scale 6. Orthoclase 1. Talc 2. Gypsum 7. Quartz Topaz Corundum 10. Diamond 3. Colcite 8. 4...Your will scratch orthoclase feldspar but not quartz. In making hardness appears to be a scratch paper...the general arrange- ment of these surfaces. Quartz and amethyst, for example, are frequently crystallized...SPODUMENE DANBURITE DATOLITE GARNET FLUORITE QUARTZ CRYSTALS SPINEL STAUROLITE •^^ VESUVIANITE |  | | Book | | The endsheet maps are reprinted from The Mexican Mining Industry 1890-1950 by Marvin D. Bernstein, by permission... CONTENTS • Foreword lX Preface Xl Important Mining Districts 1 Discovery and Developments in Mexico...introduction contains an interesting summary of the mining history and the development of mineralogy. It also...The author discusses eight of the more important mining districts in Mexico, which produce fine mineral...geologists, mineralo- LX x I Foreword gists, and mining engineers, but also for mineral and gem collectors | | | Book | | The endsheet maps are reprinted from The Mexican Mining Industry 1890-1950 by Marvin D. Bernstein, by permission...is * CONTENTS Foreword Preface Important Mining Districts Discovery and Developments in México...introduction contains an interesting summary of the mining history and the development of mineralogy. It also...The author discusses eight of the more important mining districts in México, which produce fine mineral...geologists, mineralo- x / Foreword gists, and mining engineers, but also for mineral and gem collectors |  | | Report (issue) | | 14 1. 2. 3. 4. 5. Asbestos ore Lead ore, Balmat mine, N. Y. Chromite-chromium ore, Washington Zinc ore...Peninsula, Mich. 10. Porphyry molybdenum ore, Colorado 11. Zinc ore, Edwards, N. Y. 12. Manganese nodules...Survey in accordance with the provisions of the Mining and Minerals Policy Act of 1970 (Public Law 91-631...discovered or not currently profitable to mine. The mining of mineral deposits, once discovered, depends...________________———— Utah __________________________ Marysvale district (Piute and Sevier Counties) Southern Wah Wah Mountains |  | Long, Keith R., DeYoung,, John H., Ludington, Stephen (1998) Database of significant deposits of gold, silver, copper, lead, and zinc in the United States. Open-File Report Vol. 1998 (98-206) US Geological Survey doi:10.3133/ofr98206ab | Report (issue) | | deposits of the East Shasta copper-zinc district, Shasta County, California: U.S. Geological Survey Professional...H., 1972, Geology and mineral deposits of Esmeralda County, Nevada: Nevada Bureau of Mines and Geology...p. Allsman, P.T., 1940, Reconnaissance of gold mining districts in the Black Hills, South Dakota: U.S...Nutt Wilderness Study Area (AZ-020-024), Mohave County, Arizona: U.S. Bureau of Mines Mineral Land Assessment...Plumas County, California; Venture 63: San Francisco, Calif., American Exploration and Mining Co., unpaginated |  | | Book | | PISTOLS i !?' A J.-. N ; 'jxt . 1 — \ MINING DISTRICTS and MINERAL RESOURCES of NEVADA by ...present authentic infor mation concerning the mining districts and mineral resources of Nevada. No comprehensive...United States Geological Survey in 1912. Plan. “Mining Districts and Mineral Resources of Nevada”, as...parts:—one on mining districts and the other on mineral resources. The section on mining districts is...but gives more extended descriptions and includes mining as well as geological information. The map which |  | | Journal (issue) | | page 2 Fig. 1 Barrerite, 21/4 inches long, with quartz, Kuiu Island, Alaska, Gary McWilliams collection...some of the words used to describe a lluorite mine in the San Andres Mountains of New Mexico. The author...location for a possible collectin_g ve~ture. The mine was determined to be the Bohrnstedt lluonte mme...mme and was located near Sulphur Canyon in the San Andres Mountains. The problem was that it was within...for us to reach the mine. This was accomplished and we eventually reached the mine (which included a hike |  | | Report (issue) | | Survey, Box 25046, Denver Federal Center, Denver, Colorado 80225 U.S.A. CONTENTS COAL GEOLOGY . High Chromium...Lode-Type Gold Mineralization, Hodson District, Calaveras County, California CHAFFEE, M.A., AND KUHL,...Dow Chemical #1 Garrigan Drill Hole, Mississippi County, Arkansas DIEHL, S.F., GOLDHABER, M.B., TAYLOR...Fill Above the Rabbit Creek Gold Deposit, Humboldt County, Nevada MADDEN-McGUIRE, D.J., NAESER, C.W., KELLEY...Host-Rock Units in the Getchell Gold Belt, Humboldt County, Nevada MADDEN-McGUIRE, D.J. AND MARSH, S.P... |  | | Journal (article/letter/editorial) | | acanthite paramorph after argentite from the Rayes mine, Guanajuato, Mexico. Francis Benjamin specimen,...1878); the Baker quarry near Billmeyer, Lancaster County, Pennsylvania, where it occurs as an alteration...Hill occurrence in Davidson County, and the McMakin mine in Cabarrus County (Genth 1891); and mines of...of the Virgilina district, Halifax County, Virginia (Dietrich 1990). The great silver occurrences of the...locally abundant acanthite. Many mines of the Colorado mineral belt contained important amounts of acanthite |  | | Report (volume) | | ........................ 5 5 Distribution of mining districts..................................................................................... Colorado......................................................................... PART II. Catalogue of mining districts, by J. M. Hill..................................................... Classification of mining districts........................................counties....................................... Colorado.............................................. |  | | Book | | Pale-blue turquois; Gove Turquois mine, near Cottonwood, San Bernardino County, Cal. Fie. . Turquois matrix;...Turquois mine, m Nye County, near Millers, Nev. Fia. Turquois matrix; Weber mine, Belmont, Nye County, Nev...Azure mine, Burro Mountains, N. Mex. Fic. . Cobweb turquois matrix; Southwest Turquois Co. mine, Mineral...Myers and Bona Turquois mine, 13 miles north of west of Millers, Esmeralda County, Nev. -7. Split veinlet...student at Yale University; Los Angeles Gem Co. mine, Mineral Park, Ariz. Fia. Fi. Fic. Fic. Fic. ia |  | | Catalog/List | | Avenue San Mateo, California 94403 U.S.A. Old No. l Headfnme. Whi ■ key Hlll Mine, Tuohnne County, CaUfomla...AT AL OG HATFiaD GOUDEY 1145 \'/est 31st Avenue San Mateo, California 94403 U.S.A. COMTENTS General...postal money arder. Pr i ces c;uoi:ed are F .0. B. San fl,aceo, Cali fornia. California add applicable state...association. Few of the minute crystals you see on mine or quarry dumps or even on cabinet specimens will...dumps or surface float. Mirute crystals seen on a mine dump are a clue but nearly always tao weathered |  | | Report (issue) | | 31 University of Nevada Press, Reno, Nevada 89557 USA Copyright © 2004 by University of Nevada Press Photographs...copyright © 2004 unless otherwise noted Map of Mining Districts and significant mineral occurrences of...Olivenite, 1.6-cm cluster, Majuba Hill Mine, Antelope district, Pershing County. N. Prenn collection. Photograph...production of environmental protection equipment. Mining and the discovery, identification, and development...to Nevada in 1929 and was actively involved in mining in the state and the western U.S. for the rest |  | | Report (issue) | | Mineral Consultant, 695 South Ogden Street, Denver, Colorado 80209, U.S.A. Harold F. Bonham, Jr., University...Nevada 89557-0088, U.S.A. Eiji Izawa, Department of Mining, Faculty of Engineering, Kyushu University 36,...Fluid-inclusion and geochemical studies at the Emperor gold mine, Fiji; Unpub. Ph.D. dissertation, University of...S.A., 72 p. Ashley, R. P., 1974, Goldfield mining district, jLn Guidebook to the geology of four Tertiary...metals in silicified rocks of the Goldfield mining district, Nevada: U.S. Geological Survey Professional |  | | Journal (article/letter/editorial) | | of 3 Cenozoic ores from the El Malacate and La Esmeralda porphyry copper deposits located in the Zihuatanejo–Huetamo...University, 11200 SW 8th Street, Miami, FL 33199, USA e-mail: apotr001@fiu.edu the La Verde deposit (206Pb/204Pb=18...similarity of ore Pb to igneous rock Pb in the Zimapan district (206Pb/204Pb=18.800–18.968) may indicate that...Sorpresa, Ayutla, Autlan, La Verde, Inguaran, San Isidro, La Esmeralda, Las Salinas) Epithermal (Real de Guadalupe)...Copper King) Epithermal (Fresnillo, Zacatecas) VMS (San Nicolas) Guanajuato Arperos Formation (Late J–Early |  | | Report (volume) | | the ruby, sapphire, spinel, emerald, rutile, and quartz of gem quality have been synthesized. The best...Fluorite Apatite . 6. 7. 8. 9. 10. Orthoclase Quartz Topaz Corundum Diamond The numbers preceding each...of silica (quartz, 7 on Moh's scale) particles, a gem stone should be harder than quartz. Some minerals...react to heat are: violet quartz (amethyst) changing to orange brown, smoky quartz to yellow, pale-green...sapphire, star sapphire, star ruby, rutile, and quartz are gem stones that have been successfully synthesized |  | | Journal (article/letter/editorial) | | immense quartz specimens at the Natural History Museum Bern. Photo by Eric Welch © GIA, courtesy San Diego...permanent exhibit featuring one of the largest quartz-crystal finds in the Swiss Alps, comprising fifty...Planggenstock, close to Gotthard Pass. The slightly smoky quartz specimens are distinguished by their exceptional...300 kilograms. In addition to the nearly fifty quartz specimens, a number of pink fluorite octahedra...unveiling of the GIA birthstone exhibit. Photo courtesy San Diego International Airport. Downloaded by [Selcuk |  | | Report (issue) | | ____________________________________ _ History of mining and production ________________ _ General description...States. FIGURE 1. Map showing location of uranium-mining districts in West-Central United States-------------------------2...--8. Cross sections of roll ore bodies of the Colorado Plateau region_________________________________________...size in sandstone beds of Triassic age in the Colorado Plateau region__ 10. Histogram showing the percentage...deposits in sandstone beds of Triassic age in the Colorado Plateau region_______________________________ |  | Leavitt, E. D., Spell, T. L., Goldstrand, P. M., Arehart, G. B. (2004) Geochronology of the Midas Low-Sulfidation Epithermal Gold-Silver Deposit, Elko County, Nevada. Economic Geology, 99 (8) 1665-1686 doi:10.2113/gsecongeo.99.8.1665 | Journal (article/letter/editorial) | | Low-Sulfidation Epithermal Gold-Silver Deposit, Elko County, Nevada E. D. LEAVITT,† Department of Geological...Nevada 89154-4010 P. M. GOLDSTRAND, Bureau of Mining Regulation and Reclamation, 333 W. Nye Lane, Carson...exchanged meteoric waters. Introduction THE KEN SNYDER mine exploits the largest known Au-Ag epithermal deposit...in the historic mining district of Midas, previously known as the Gold Circle district (LaPointe et al...deposit consists of a complex of steeply dipping, quartz-adularia-calcite-precious metal bonanza veins hosted |
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