 | | Report (issue) | | gold----------------Research on analysis of the platinum group metals-------------------------Research...short supply. These metals are. gold, si~ver, platinum-group metals, mercury, tin, anumony, bismuth,...national economy. Th~se metals include gold, silver, platinum-group metrls, antimony, bismuth, mercury, silver...field projects were in or W'7.St of the Rocky Mountains, but several were in nort'1-central states, in...systems involving heavy metals; and research on the platinum metals, the geochemistry of gold, and the crustal |  | | Report (volume) | | Precambrian Melasyenite of Ute Creek, San Juan Mountains, Colorado11 Chemistry, Petrology, and Strontium... Precambrian Melasyenite of Ute Creek, San Juan Mountains, ColoradoChemistry, Petrology, and Strontium...GEOLOGY PRECAMBRIAN MELASYENITE OF UTE CREEK, SAN JUAN MOUNTAINS, COLORADO CHEMISTRY, PETROLOGY, AND STRONTIUM...deposits at Ute Creek in the northcentral San Juan Mountains, Colo. This rock contains about 22-49 percent...melasyenite at Ute Creek, in the north-central San Juan Mountains of Colorado, was first pointed out by Cross |  | 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) | | W. E., 1900, Report on the Alta group of mines, San Miguel County, Colorado: Golden, Colorado School...Armbrustmacher, T. J., 1976, Thorium deposits in the Wet Mountains area, Fremont and Custer Counties, Colorado: U...and primary magmatic carbonatites from the Wet Mountains area, Fremont and Custer Counties, Colorado: Economic...Multipleintruded carbonatite dike in the Wet Mountains of Colorado, in Geological Survey research 1978:...Multiple carbonatite dike at McClure Gulch, Wet Mountains alkalic province, Fremont County, Colorado: The |  | | Report (volume) | | Radioactivity in the Metal-Mining Districts of the San Juan Mountains Colorado GEOLOGICAL SURVEY --*_-. BULLETIN...Radioactivity in the Metal-Mining Districts of the San Juan Mountains Colorado By C. T. PIERSON, W. F. WEEKS, and...radioactivity in the metal-mining districts of the San Juan Mountains, Colorado, by C. T. Pierson, W. F. Weeks...412-413. 1. Radioactivity. 2. Uranium ores San Juan Mountains. i. Title. (Series: U. S. Geological Survey...district_____________________________________ Needle Mountains area.._______________________________ Spar City |  | | Journal (article/letter/editorial) | | surface and enclosed during etching in a perforated platinum box. The high temperature involved precludes the...practice 11.5 g of KOH are mixed with 8 g NaOH in a platinum or silver crucible and brought up to a temperature...Sample 72N8, from the Fish Canyon Tuff in the San Juan Mountains, Colorado, has K - A r ages on biotite, hornblende...Obradovich, Age of volcanic activity in the San Juan Mountains, Colorado, U.S. Geol. Surv. Prof. Paper 575-D |  | Ringrose, Christopher R., Harmon, Russell S., Jackson, Simon E., Rice, Clive M. (1986) Stable isotope geochemistry of a porphyry-style hydrothermal system, West Silverton District, San Juan Mountains, Colorado, U.S.A. Applied Geochemistry, 1 (3) 357-373 doi:10.1016/0883-2927(86)90021-1 | Journal (article/letter/editorial) | | hydrothermal system, West Silverton District, San Juan Mountains, Colorado, U.S.A. CHRISTOPHER R . RINGROSE...intrudes Tertiary volcanic rocks of pre- and post-San Juan Caldera age along the western margin of the Silverton...INTRODUCTION STABLE isotope evidence from the San Juan Volcanic Field in C o l o r a d o has demonstrated...Mountain intrusive complex in the western San Juan Mountains (FORESTERand TAYLOR, 1980) and the Sunnyside...the Silverton Caldera, which together with the San Juan and Uncompahgre Calderas, comprises a caldera |  | | Journal (article/letter/editorial) | | glomerateamountto about$20 million and could be San Juan Mountains,betweenOuray and Silverton, much greater...midTertiary are exposedin the northwesternSan Juan Mountains (Burbank and Luedke, 1968; Mayor and Fisher...regionwasreduced to a surface of slightrelief(the San Juan peneplain)by late Pliocenetime. This surfacewas...dipsabout5øE. Lava flows,breccias, and mudflows of the San Juan Formationwere eruptedfrom numerouscentralvolcanoes...port, over whichall measurements are made.The platinum resistancethermometerwas calibrated on '-%• / |  | | Report (volume) | | _____________________________________________________ Needle Mountains, Colo__________________________________________...Formation_______________________________________ Tusas Mountains, N. Mex_______________________________________-___...figures are geologic maps] Page FIGURE 1. Needle Mountains, Colo., and index map for figures 2, 3, 4, and...Conglomerate, Needle Mountains, Colo____________ 3. Snowdon Peak area, Needle Mountains, Colo_______________...Needle Mountains, Colo______________________________ 5. Uncompahgre Formation, Needle Mountains, Colo__________ |  | | Report (volume) | | infrared Landsat multispectral scanner image of the San Juan National Forest and vicinity in early October...altitude of 705 km. Approximate boundary of the San Juan National Forest is shown by white line. Mineral... Mineral Resource Potential and Geology of the San Juan National Forest, Colorado Edited by Richard E. Van...Mineral resource potential and geology of the San Juan National Forest, Colorado I edited by Richard...2127 1. Mines and mineral resources--Colorado-San Juan National Forest. I. Van Loenen, Richard E. II |  | | Report (issue) | | and Uncompahgre National Forests........... Elk Mountains-Collegiate (2-180)..............................Wilderness (NF-180)........................ Elk Mountains-Collegiate (2-180)..............................Needles (2-239)....................................... San Miguel (2-240)............................................. South San Juan (2-284)...................................... South San Juan Wilderness (NF-284)...(2-157).......................................... San Isabel/Pike National Forest..................... |  | | Report (issue) | | Talkeetna Mountains and central Alaska Range ________________________ _ Wrangell Mountains __ --------------Yakutat...area, eastern San Juan Mountains ________ _ _ _ _ _ _ _ _ _ _ _ orthwestern San Juan Mountains ________ Silver...Wyoming ___ ______________________ _ Platinum metals, Medicine Bow Mountains ____________ _ _____ _ __ _ 23...000 analyses for gold, 755 analyses of platinum metals (platinum, palladium, and rhodium), 21,000 analyses...on 55,000 samples, and 120 complete spectro1 Mountains south of Prescott in central Arizona (1,165 sq |  | | Report (issue) | | _________________________ Stratigraphy of Roberts Mountains Formation _ _ _ Fluid-inclusion studies __________________...sulfate minerals- _ _ _ Studies on platinum-group minerals- _________ Platinum-group minerals from Goodnews..._______________________ Miscellaneous studies __________________ Platinum content of ultramafic rocks ________ Abundance...____________ Determination of the platinum metals ______ Determination of platinum and palladium by atomic absorption...rocks ___________________________ Determination of platinum, palladium, and rhodium by fire assay and emission |  | | Journal (issue) | | ............. 339 by M. I. Jacobson The San Juan Mountains of Colorado ...............................Porter mine, Luona mine Elk Mountains, White Rock and Teocalli Mountains (Loellingite, Smaltite, Pyrargyrite...Freibergite, Tetrahedrite, Miargyrite) Idarado mine (See San Miguel County) Michael Breen mine Mountain Monarch...Apatite) Spruce Grove, Lone Lode pegmatite Tarryall Mountains (Topaz, Quartz var. Smoky, Microcline) HomeSweet...Quartz) Hall turquoise mine Villa Grove (Turquoise) SAN JUAN COUNTY Adams mine Red Bonita mine Gladstone, Silverton |  | | Report (issue) | | source of travertine in the Creede Formation, San Juan Mountains, Colo., by T. A. Steven and Irving Friedman__...and control of uranium deposits in the southern San Juan basin mineral belt, New Mexico-An hypothesis,...---------------Gravity anomalies in the Ruby Mountains, northeastern Nevada, by J. F. Gibbs, Ronald Willden... Geochemistry Determination of palladium and platinum in rocks, by F. S. Grimaldi and M. M. Schnepfe_...Late Tertiary syncline in the southern Absaroka Mountains, Wyo., by F. S. Fisher and K. B. Ketner _______________ |  | Boroughs, S., Wolff, J.A., Ellis, B.S., Bonnichsen, B., Larson, P.B. (2012) Evaluation of models for the origin of Miocene low-δ18O rhyolites of the Yellowstone/Columbia River Large Igneous Province. Earth and Planetary Science Letters, 313. 45-55 doi:10.1016/j.epsl.2011.10.039 | Journal (article/letter/editorial) | | University, Pullman, WA 99164, USA 927 E 7th St, Moscow, ID 83843, USA a r t i c l e i n f o Article...Webster Physical Sciences 1228, Pullman, WA 991642812, USA. Tel.: + 1 509 991 0698. E-mail address: geoentoptics@wsu...gas. Oxygen was converted to CO2 gas by a small platinum–graphite converter, the yield was measured, and...8 7 6 5 4 3 2 1 10 9 8 7 6 5 4 3 2 1 Cassia Mountains (A) Browns Bench (B) 10 8 6 4 2 20 18 16 14...are on the northern margin of the CSRP, Cassia Mountains, Browns Bench, and Bruneau–Jarbidge are on the |  | | Report (volume) | | Boulder County to the southern limits of the San Juan Mountains. They have yielded much of the silver and...minerals in the lava flows of North and South Table Mountains, lefferson County, the contact-metamorphic minerals... LOCALITIES 17 Arkansas River and Ruby and Sugarloaf Mountains east of the river-yield gem crystals from lithophysae...Cement Creek on a poor secondary road. The Italian Mountains are about 1 miles northeast of (and 2,000 feet...one-half mile to the mine. Locality 18.-Table Mountains. Analcite, apophyllite, aragonite, calcite, chabazite |  | | Report (issue) | | buried, Precambrian features underlying Franklin Mountains and Great Bear and Mackenzie Plains: Bulletin...Tectonics of the Jemez lineament in the Jemez Mountains and Rio Grande rift: Journal of Geophysical Research...and primary magmatic carbonatites from the Wet Mountains area. Fremont and Custer Counties, Colorado: Economic...J., 1984, Alkaline rock complexes in the Wet Mountains area, Custer and Fremont Counties, Colorado: U...resources of thorium and related elements in the Wet Mountains area. Fremont and Custer Counties, Colorado: U |  | | Book | | 3. NEW MINES AND MINERALS Organ Mountains Jarilla Mountains Santa Rita Area and the Central Mining...Grant County Burro Mountains Apache No, 2 District Lake Valley Caballo Mountains Chloride District Hansonburg...AND MINERALS History of the San Luis Valley and the San Juan Mountains Bonanza District 33 33 36 37...Cochetopa Creek Cinnabar Prospect La Garita San Juan Mountains Mines Near Sawpit Mt. Sneffels-Telluride...Area Iron Springs District (Ophir) Rico Mountains LaPlata Mountains Creede Wagon Wheel Gap Fluorspar and |  | | Report (issue) | | - _ ___ Age of volcanic activity in the San Juan Mountains, Colo., by T. A. Steven, H. H. Mehnert, and..._____ ----_ Ordovician tectonism in the Ruby Mountains, Elko County,· Nev., by Ronald Willden and R...._______ -_----Preliminary report on sulfide and platinum-group minerals in the chromitites of the Stillwater..._______ Usc of infrared imagery in study of the San Andreas fault system, California, by R. E. Wallace...metals and silver in the southern Santa Rita Mountains, Santa Cruz County, Ariz., by Harald Drewes-- |  | | Report (issue) | | Metal Concentrations "Disseminated" chromite. Platinum-group metals are common accessories. DEPOSIT DESCRIPTION...concentric zoning of rock types containing chromite, platinum and Ti- Vmagnetite. GENERAL REFERENCE GEOLOGICAL...Deposit Types deposits. Metal Concentrations Platinum group elements (PGE) plus Au placer Cr, Ni, PGE...(Cyprus), York Harbor, (Canada) Turner-Albright, (USA) References 3.1 (continued) Petersen and Zantop...Geochemical Signature; terranes) Examples Au+As+B+Sb (+platinum-group metals in mafic volcanic Homestake, South |  | | Report (volume) | | ........................................ Ute Mountains......................................................-......-....."-----......--... La Plata Mountains.................................................Mineral Belt, showing its relationship to the San Juan volcanic field, Rio Grande rift, and -300-milligal...show that some igneous centers, such as the Ute Mountains and some of the stocks in the northern Sawatch...associated mineral deposits, such as the La Plata Mountains and some stocks in the northeastern part of the |  | | Report (issue) | | Relation of the Cretaceous formations to the Rocky Mountains in Colorado and New Mexico, by W. T. Lee (published...section showing the physiographic evolution of the San Juan region since the beginning of Tertiary time. ...Profile from weste~·n Colorado across the Rocky Mountains to the Denver Basin, showing the warped peneplain.............. 17. Group of sections from Datil Mountains to Gallina, N.Mex...............................Group of sections in Colob Plateau and Henry Mountains, Utah . . . . . . . . . . . . . . . . . . . . |  | | Journal (article/letter/editorial) | | epithermal-porphyry 336 deposits in the San Juan Mountains in Colorado (Bove et al., 2009) have shown...1982), and mineralized veins 340 in the San Juan Mountains contain fluorite. The presence of topaz has...Pliocene-Pleistocene Yukon River capture, eastern Alaska, USA, and Yukon, Canada. Geology 46, 635-638. https://doi...examples from the Animas River Watershed, San Juan Mountains, Silverton, Colorado. Geochem: Explor., Environ...giant Pebble porphyry Cu-Au-Mo deposit, Alaska, USA, using high resolution ICP-MS. Geochem: Explor., |  | | Report (issue) | | 539-F Geology and mineral resources of the White Mountains National Recreation Area, east-central Alaska... Preliminary geologic map of the Beaver Lake Mountains quadrangle, Beaver and Millard Counties, Utah...of the Raywood Flat Roadless areas, Riverside and San Bernardino Counties, California. Reston, Va. : U...River Canyon Wilderness Study Area, Montrose and San Miguel counties, Colorado. Washington : U.S. G.P...continental shelves. Academic Press, c!988. 523 W347o San Diego : COSMOLOGY. Harrison, Edward Robert. Masks |  | | Report (issue) | | . Mafic and ultramafic inclusions, Crater 160, San Francisco volcanic field, Arizona, by David Cummings...and reconstituted rocks of Mule Ear diatreme, San Juan County, Utah, by R. A. Cadigan and D. E. Stuart-Alexander...CONTENTS Page Geophysics Gravity study of the San Juan Mountains, Colo., by Donald Plouff and L. C. Pakiser...major structural break in the northern White Mountains, Calif.-Nev., by D. F. Crowder and D. C. Ross... One parallels the northern coastline from Cape San Bias to the vicinity of Mobile Bay; the other generally |
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