 | | Journal (article/letter/editorial) | | Dakota Crystal Mountain district, Colorado Clear Creek district, Colorado Bunkerville district, Arizona/Nevada...in diameter, albite, green beryl, columbite, muscovite, and black tourmaline (Seybert, 1824; Webster...orthoclase(?), black tourmaline, garnet (almandine?), muscovite, biotite, and columbite (Navias and Ostrom, 1951)...in quartz, Wisdom Ranch prospect, Larimer County, Colorado. Crystal is VA by VA by 1/8 inches. MARCH/APRIL...embedded in milky quartz associated with oligoclase, muscovite, black tourmaline, almandine, and zircon. Twentieth-century |  | | Journal (article/letter/editorial) | | MICHAEL J. GOBLA 19055 East Bethany Place Aurora, Colorado 80013 gobla@copper.net Unless otherwise noted...Indian Queen mine ca. 1905 at Farlin, Beaverhead County. 208 ROCKS & MINERALS Downloaded by [University...mines at Butte in Silver Bow County and the Black Pine mine in Granite County have produced many fine crystal...Beaverhead County, the pegmatites of Jefferson County, and the Snowbird mine in Mineral County continue...Highlands Centennial Nugget in 1989 in Silver Bow County. The seventh largest gold nugget found in Montana; |  | | Journal (article/letter/editorial) | | northeasterly-trending continentul Figure 2. Geologic map of the Colorado Front Range showing the Precambrian metamorphic...Karistrom 1978; Lanthier 1978). Farther south in Colorado, sediments accumulated in decper-water rocks formed...Survey into “Early, Middle, and Late” Eras. In Colorado we because of the subsequent folding and overthrusting...subduction zone and possibly the creation Era in Colorado and Wyoming of a volcanic island arc. Carpenter...perhaps be the Phillipine island arc, and Jack Colorado show two major rock groups with different ages |  | | Report (volume) | | urn-bearing Area, Ralston Buttes District, Jefferson County, Colorado U.S. GEOLOGICAL SURVEY BULLETIN 1555...urn-bearing Area, Ralston Buttes District, Jefferson County, Colorado By E.]. YOUNG U.S . GEOLOGICAL SURVEY...and prospects in the Front Range near Golden, Colorado UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON...uraniumbearing area, Ralston Buttes district, Jefferson County, Colorado. (Geological Survey bulletin ; 1555)...I. Geology-Colorado-Jefferson County. 2. Uranium mines and mining-Colorado-Jefferson County. 3. Geoch |  | | Journal (article/letter/editorial) | | IVAN JACOBSON 1714 S. Clarkson Street Denver, Colorado 80210 markivanjacobson@gmail.com No pegmatite...Granite, near Red Stone quarry, Conway, Carroll County, New Hampshire. Henry Minot specimen and photo...Teller and Park counties, CO, USA Crystal Park–Bear Creek, El Paso County, CO, USA Pikes Peak Granite NYF... 3 Mount Antero and Mount White, Chaffee County, CO, USA Mount Antero Granite NYF Miarolitic beryl...Mountains, Boise, Custer and Elsmore counties, ID, USA Sawtooth Granite in the Idaho batholith NYF Miarolitic |  | | Journal (article/letter/editorial) | | accepted abstracts follow. THE GARNET LINE IN OXFORD COUNTY, MAINE, PEGMATITES. M. M. Felch, W. B. Simmons...intermediate and core zones in many of the Oxford County, Maine, pegmatites. This study primarily focuses...similar to the model proposed for the San Diego County pegmatites (Webber et al. 1997, 1999). The garnet...shallow level pegmatite-aplite dikes, San Diego County, California. American Mineralogist 84:708–17. ...crystals and fills in space between equally large muscovite plates. Garnets are also occasionally found on |  | | 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...Elyton; Lee County, at Chewacla lime works; St. Clair County, at Gfeensport; Shelby County, near Whiting |  | | Book (edition) | | 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...to Helena, in Shelby county, the field has an average width of 5 or 6 miles. Below that point the width...miles being in the latitud" of Blocton, in Bibb county. The south ern end of this field has a greater...places: At Henryellen, Jefferson county; Helena, Montevallo, and Brierfield, Shelby county; and at Blocion. |  | | 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 (volume) | | Western Part of the Morrison Quadrangle Jefferson County, Colorado GEOLOGICAL SURVEY BULLETIN 1251-E...Western Part of the Morrison Quadrangle Jefferson County, Colorado By D. J. GABLE CONTRIBUTIONS TO GENERAL...rocks along the mountain front due west of Denver, Colorado UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON...WESTERN PART OF THE MORRISON QUADRANGLE JEFFERSON COUNTY, COLORADO By D. J. GABLE ABSTRACT The Morrison...vicinity of the larger faults where chlorite and muscovite are more abundant. The rocks were deformed at |  | | Report (volume) | | ............................................. Colorado.................................................especially from those of Arkansas, California, Colorado, New Mexico, Oregon, South Dakota, Tennessee,...minerals and rocks, their occurrence and uses: Colorado State Geol. Survey Bull. 6, 1913. 8 USEFUL...See Bauxite and Halloysite. 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; |  | | Report (issue) | | Mineralization, Ladwig uranium mine, Jefferson County, Colorado by Alan R. Wallace Open-File Report...Generalized geologic map of Foothills region, Colorado Front Range, showing location of Ladwig mine •••••••••••••••••...Mineralization, Ladwig uranium mine, Jefferson County, Colorado by Alan R. Wallace ABSTRACT Uranium ore...ore at the Ladwig mine, Jefferson County, Colo., occurs in steeply dipping, northwest-striking faults...veins. INTRODUCTION The eastern foothills of the Colorado Front Range contain several veintype uranium deposits |  | | Report (issue) | | Schwartzwalder uranium deposit, Front Range, Colorado by W* Alan R., Wallace 1 U.S. Geological Survey...uranium deposit, in the Front Range west of Denver, Colorado, is the largest vein-type uranium deposit in the...flow related to igneous activity in the nearby Colorado mineral belt. Temperatures decreased from 225°C...of the Schwarzwalder mine in the Front Range, Colorado. 2 2. Cross-section of the Schwartzwalder mine... SCHWARTZWALDER URANIUM DEPOSIT, FRONT RANGE, COLORADO CHAPTER 1. INTRODUCTION The Schwartzwalder uranium |  | | Journal (article/letter/editorial) | | KARLSON* Cotter Corporation,P.O. Box 1017, Golden, Colorado 80401 Abstract A detailedstudyof the geologyof...shownin / .:::::::::Jamestown:::. Figure 2. I COLORADO :::::::Gold oo0 ..............................geologic mapoftheeast-central partoftheFrontRange, Colorado (modified from Tweto, 1979). Quartz-rich zonesin...tr tr Calcite tr 3 14 27 11 6 32 tr Muscovite Clinopyroxene 35 39 50 17 40 Garnet 23...1983b). The pyrite-micaschistmemberis composedof muscovite,quartz,pyrite, pyrrhotite,andbiotite. Micaceo |  | | Journal (article/letter/editorial) | | Two Point claim, Pikes Peak batholith, Teller County. The Collector’s Edge specimen, Jeff Scovil photo...Mail Stop 150, Box 25046 Federal Center Denver, Colorado 80225 pmodreski@usgs.gov C olorado is, of course...been written as guides to mineral collecting in Colorado. A classic, which went through three major editions...1951 version with a slightly different title), is Colorado Gem Trails and Mineral Guide, by Pearl (1951,...up-to-date guidebook to the state’s minerals is Colorado Rockhounding, by Voynick (1994). Other published |  | | Journal (article/letter/editorial) | | Although Colorado may be most noted for rhodochrosite or amazonite, the many varieties and associations...a k e w o o d , Colorado 80225 DIANNE L. K I L E 333 S a l e m Street Aurora, Colorado 80011 C O L O...and J. A. Mur phy for an update to Minerals of Colorado: A 100-Year Record (Eckel, 1961). 374 ROCKS... Quartz was a familiar gemstone to many early Colorado residents, as documented by an extensive body...body of literature. The first published list of Colorado mineral localities (in cluding quartz) was included |  | Wallace, C.A., Schmidt, R.G., Lidke, D.J., Waters, M.R., Elliott, J.E., French, A.B., Whipple, J.W., Zarske, S.E., Blaskowski, M.J., Heise, B.A., Yeoman, R.A., O'Neill, J. M., Lopez, D.A., Robinson, G.D., Klepper, M.R. (1986) Preliminary geologic map of the Butte 1 degree by 2 degrees quadrangle, western Montana. Open-File Report Vol. 1986 (86-292) US Geological Survey doi:10.3133/ofr86292 | Report (issue) | | Telegraph Creek Formations (Upper Cretaceous) Colorado Group Consists of Marias River Shale (Upper Cretaceous)...related rocks (Upper and Lower Mississippian) and Jefferson Formation (Upper Devonian). Occurs west, southwest...northwest of Deer Lodge Valley Devonian rocks Djm Jefferson and Maywood Formations (Upper Devonian) Devonian...D6s Devonian and Cambrian formations Includes Jefferson and Maywood Formations (Upper Devonian) and the...Cretaceous or Tertiary time Ybsh Ybqg Ybcg Biotite-muscovite schist and interbedded quartzite and lesser amounts |  | | 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 |  | | Book | | Gkologim-in-charge. CATALOGUE OF MINERALS FOUND IN COLORADO. BY • F. M. ENDLICH. [EXTRACTED FROM THE TENTH...been adopted. tar as practicable, analyses of Colorado minerals have been given. They will aid examination...of the catalogue. systematic enumeration of the Colorado mineral species and references to the publications...Endlich, S. IN COLORADO. X. D. The continuous development of mineral resources of Colorado is productive...Geological .Report for PS75. Now, the survey of Colorado is completed, many additions of species new to |  | | Journal (article/letter/editorial) | | NYF-type pegmatites of the Wausau complex in Marathon County, Wisconsin (Falster, Buchholz, and Simmons 2013)...2013), and the LCT-type pegmatites of Florence County, Wisconsin (Falster, Simmons, and Webber 1996). He...Palermo No. 1 pegmatite, North Groton, Grafton County, New Hampshire. It occurs in small cavities in...from the Estes quarry, West Baldwin, Cumberland County, Maine, where it is associated with sphalerite...sphalerite, schoonerite, quartz, fairfieldite, and muscovite. Scanning electron microscope image of falsterite |  | | Journal (issue) | | Pegmatites in the Pikes Peak Batholith, Central Colorado Daniel E. Kile Research Associate, Denver Museum...Nature & Science 5176 Black Bear Run - Littleton, Colorado 801215 Email: centennial87@comcast.net were sparse...throughout the Pikes Peak batholith in central Colorado, and many of them provide spectacular thumbnail-...pegmatites in the Pikes Peak batholith (PPB) in central Colorado. Although some minerals, such as fluorite, hematite...batholith, in an area north of Florissant in Teller County, taken prior to the arsoncaused 2002 Hayman fire |  | | Journal (article/letter/editorial) | | Amcnnpijiite: In the Emery Mining district (Powell County) the mineral is found in wellformed crystals in...Crevasse Mountain Mining district near Jardine (Park County). At the Kennebec mine in the Crevasse Mountain...the Crevasse Mountain district near Jardine (Park County) on the Vindicator claim, one-half inch tabular...cummingtonite. In the Hog Heaven Mining district (Flathead County) at the Flathead Mine, pale yellowish to colorless...property, accessible by county road. MINERALS Andakisite: Near Dillon (Beaverhead County) in Axes Canyon, |  | | Report (issue) | | Peninsula, Mich. 10. Porphyry molybdenum ore, Colorado 11. Zinc ore, Edwards, N.Y. 12. Manganese nodules...Gneiss and Related Rocks, East-Central Front Range, Colorado By SHERMAN P. MARSH and DOU1GLAS M. SHERIDAN GEOLOGY...and geochemical study of rutile-bearing rocks in Colorado and a description of their occurrence elsewhere...gneiss and related rocks, east-central Front Range, Colorado. Includes bibliographies. Supt. of Docs. no.:...Yuma County, Arizona. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Santa Cruz County, Arizona |  | | Journal (article/letter/editorial) | | increasingdistancefrom the vein, in the order sericite(muscovite polytype1M, in part), kaolinite,and montmorillonite...Recent data showingextensivestability fields for muscovite,kaolinite and montmorilloniteindicate that specificinferencesof...perhaps lessthan 200ø C, requiredfor formationof muscovite. The microcrystallinequartz vein filling varies...Preliminary report on the Comet area, Jefferson City quadrangle, Jefferson County, Montana: U.S. Geol. Survey Trace...Comet and Gray Eagle mines and adjacent area, Jefferson County, Montana: U.S. Geol. Survey Trace Elements |  | | Report (chapter) | | South Platte District, Colorado · by Wm. B. Simmons and E. Wm. Heinrich Colorado Geological Survey Department...Department of Natural Resources Denver, Colorado I 1980 Front cover: Wide Angle photograph of the Oregon...2~ pegmatite, South Platte pegmatite district, Colorado. This striking example graphically illustrates...RARE-EARTH PEGMATITE$ OF THE SOUTH PLATTE DISTRICT, COLORADO by Wm. B. Simmons, Jr. Department of Earth Sciences...Michigan Ann Arbor, Michigan 48109 CGS LIBRARY Colorado Geological Survey Department of Natural Resources |
|
White Cloud pegmatite, South Platte Pegmatite Mining District, Jefferson County, Colorado, USA