 | | 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...Appendix E. Geochronologic data listed by mining district .. ........... ............. .......... .....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 |
 | | Report (issue) |
| Aspen 15-minute Quadrangle, Pitkin and Gunnison Counties, Colorado By BRUCE BRYANT GEOLOGICAL SURVEY PROFESSIONAL...A study of an area at the intersection of the Colorado mineral belt with the west flank of the Sawatch...Aspen 15-Minute quadrangle, Pitkin and Gunnison Counties, Colorado (Geological Survey Professional Paper...Bibliography: p. 123 1. Geology Colorado Aspen region. 2. Mines and mineral resources Colorado Aspen region. I. Title.......... ............. Mixed quartz diorite, pegmatite, quartz monzonite, and mica schist and gneiss |
 | Runyon, Simone E., Seedorff, Eric, Barton, Mark D., Steele-MacInnis, Matthew, Lecumberri-Sanchez, Pilar, Mazdab, Frank K. (2019) Coarse muscovite veins and alteration in porphyry systems. Ore Geology Reviews, 113. 103045 doi:10.1016/j.oregeorev.2019.103045 | Journal (article/letter/editorial) |
| Laramide arc in Arizona, as well as at the Yerington district in Nevada. This work describes coarse muscovite...porphyry system), Gunnison (Texas Canyon stock), Grayback (Kelvin-Riverside district), E- Sycamore Canyon...Canyon, the New Cornelia mine (Ajo district), and two systems in the Yerington district. Muscovite is the dominant...Mo-Cu systems related to stocks ranging from quartz monzonite to granite in composition form at shallower...expressions of hydrothermal alteration vary from district to district in intensity, geometry, and mineral assemblage |
 | | Journal (article/letter/editorial) |
| 2000 Lakeshore Drive, New Orleans, Louisiana 70148, USA Sarah L. HANSON Geology Department, Adrian College... 110 S. Madison Street, Adrian, Michigan 49221, USA Alexander U. FALSTER and Karen L.WEBBER Department...2000 Lakeshore Drive, New Orleans, Louisiana 70148, USA Abstract Pegmatites enriched in the rare-earth elements...Wisconsin through Colorado to Arizona. Four widely geographically spaced pegmatite districts that are...are compared and contrasted in this study. The pegmatite districts include the circa 1.5 Ga Wausau syenite |
 | | Report (volume) |
| Intrusive Rocks ana Associated Ore Deposits in the Colorado Mineral Belt U.S. GEOLOGICAL SURVEY BULLETIN... Alaska Rm. 101,4230 University Dr. LAKEWOOD, Colorado Federal Center, Bldg. 810 MENLO PARK, California...Intrusive Rocks and Associated Ore Deposits in the Colorado Mineral Belt By Charles G. Cunningham, Charles...understand the temporal and spatial evolution of the Colorado Mineral Belt UNITED STATES GOVERNMENT PRINTING...intrusive rocks and associated ore deposits in the Colorado Mineral Belt / by Charles G. Cunningham ... [et |
 | | 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 (issue) |
| Basement in Colorado GEOLOGIC A I, Rock Units of the Precambrian Basement in Colorado By OGDEN TWETO...TWETO GEOLOGY OF THE PRECAMBRIAN BASEMENT IN COLORADO U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1321-A...igneous rocks in outcrop and the buried basement in Colorado UNITED STATES GOVERNMENT PRINTING OFFICE...1912-1983 Rock units of the Precambrian basement in Colorado. (Geological Survey Professional Paper ; 1321-A)...Geology, Stratigraphic Pre-Cambrian. 2. Geology Colorado. QE653.T9 1986 551.7'1'09788 I. Title. For sale |
 | | Report (issue) |
| GEORGETOWN QlJADRANGLE (TOGETHER 'VITH THE EMPIRE DISTRICT) COLORADo· BY JOSIAH E. SPURR AND GEORGE H. GARREY...... _·_ .................................... . Quartz gneiss ...................................... _..... : .................................. . Quartz monzonite gneiss (adamellite gneiss) ........................................ _....... __ ... . Quartz monzonite (adamellite) ... ~ ................... : ............................................. . Quartz-bearing diorite and associated hornblendite .... |
 | | Report (volume) |
| in Colorado GEOLOGICAL SURVEY BULLETIN 1422-D Nomenclature of Precambrian Rocks in Colorado By...Ogden, 1912Nomenclature of Precambrian rocks in Colorado. (Contributions to stratigraphy) (Geological Survey...Pre-Cambrian. 2. Geology, Stratigraphic Nonmenclature Colorado. I. Title. II. Series. HI. Series: United States... ILLUSTRATION Page FIGURE 1. Map of parts of Colorado and adjoining States showing distribution of Precambrian...1. Classification of Precambrian rock units in Colorado............................. D4 in CONTRIBUTIONS |
 | | Report (volume) |
| uranium in the Lassen lavas is concentrated in zircon. 207 208 3 SELECTED BIBLIOGRAPHIES OF URANIUM...Verh., 131 Jahresvers., p. 138-139. Two samples of quartz porphyry and four samples of spilite contain 4...proportion of minor accessories (sphene, apatite, and zircon). Part of the uranium and thorium is interstitial...for the following observation. At the W. Wilson mine, "a few secondary minerals, mainly metatorbernite...distributed along and adjacent to fractures [in quartz monzonite] outside of the ore bodies, indicating the |
 | | Report (issue) |
| Rocks Northeast of Steamboat Springs, Park Range, Colorado GEOLOGICAL SURVEY PROFESSIONAL PAPER 1041...Rocks Northeast of Steamboat Springs, Park Range, Colorado By GEORGE L. SNYDER with a section on GEOGHRONOLOGY...unstudied area of Colorado and comparison with related rocks elsewhere in Colorado and Wyoming UNITED...rocks northeast of Steamboat Springs, Park Range, Colorado. (Geological Survey Professional Paper 1041) Bibliography:...Docs, no.: I 19.16:1041 1. Intrusions (Geology) Colorado Steamboat Springs region. 2. Geology, Stratigraphic |
 | | Report (issue) |
| deposits________________________ Quartz-tungsten veins......._____________________ Quartz-gold veins.._________..._________________ ___. Nevada ___________ Elko County. - ______ ... _ Star mine, Harrison Pass _____ ____ Pag« 59...63 Good Hope barite mine, Tuscarora Range _____ _ ._. ________ Humboldt County Golconda manganese-tungsten...Ltd., mine...... --_--______.______ Lincoln County__-__-----_-----_-----___ Tern Piute district.........district____ .________..__ Nevada Scheelite mine.. _ ______ Hooper No. 2 mine __ _____ _ _ Yankee Girl mine_______________ |
 | | Report (issue) |
| Quadrangle, Colorado GEOLOGICAL SURVEY PROFESSIONAL Prepared in cooperation with the Colorado State Geological...Geological Survey Board and the Colorado Metal Mining Fund PAPER 289 Geology and Ore Deposits of...of the Garfield Quadrangle, Colorado By McCLELLAND G. DINGS and CHARLES S. ROBINSON GEOLOGICAL SURVEY...in cooperation with the Colorado State Geological Survey Board and the Colorado Metal Mitting Fund. A...________________ _ Quartz-mica schist _____________ _ Quartz-hornblende schist _______ _ Quartz-hornblende gneiss |
 | | Journal (article/letter/editorial) |
| 3749/canmin.1600010 A TECTONIC EVALUATION OF PEGMATITE PARENT GRANITES SARAH L. HANSON Adrian College...Department, 110 S. Madison St., Adrian, Michigan 49221, USA ABSTRACT Pegmatites containing rare elements can...suggested by the acronyms. The relationship between pegmatite family and granite tectonic type were re-examined...published granite compositions as a proxy for initial pegmatite composition, with special regard to the orogenic...diagrams for these granites suggest that LCT granite-pegmatite systems originate in orogenic and perhaps less |
 | | Report (issue) |
| the Poncha Springs NE Quadrangle, Chaffee County,Colorado By RALPH E. VAN ALSTINE With a section on ... 626 Prepared in cooperation with the Colorado State Mining Industrial Development Board UNITED STATES...rocks _____________________________ _ Gneissic quartz monzonite ______________ _ Tabular intrusive rocks _________________...Van Alstine and Doak C. Cox _________ _ Colorado-American mine ______________ -_Delay adit and Lloyd shaft...--_-----_Manganese Hill and Chimney Hill mines_Last Chance mine _________________ -_-_Other fluorspar deposits ________ |
 | | Journal (article/letter/editorial) |
| University] at 23:49 05 October 2014 Daybreak Mine, Spokane County, Washington T he naming of minerals that...its outstanding classic occurrence at the Daybreak mine near Elk, Washington. Autunite is characterized...most “autunite” specimens that have been found on mine dumps or have resided in collections for decades...some localities, including that from the Daybreak mine described below, dehydrates in such a way that what...of autunite aggregates from the Daybreak mine, Spokane County, Washington; John Lucking specimen, Jeff |
 | | Journal (article/letter/editorial) |
| Sawatch Range, Colorado ABSTRACT A suite of igneous rocks from the Sawatch Range, Colorado, known to have...dated pegmatite minerals and minerals separated from granitic country rocks from the Quartz Creek Pegmatite...Pegmatite District, Colorado, using K-Ar, U-Pb, and RbSr mineral techniques. Wetherill and Bickford (1965)...wholerocks, mineral separates, and pegmatite minerals from the Quartz Creek area and elsewhere in the Sawatch...GEOLOGY The oldest rocks cropping out in the Quartz Creek area are hornblende and biotite gneisses which |
 | | Report (issue) |
| ________ _ Beach deposits ___ -----------------Colorado _____________________________ _ Crystalline rocks...Perce Counties __________ _ Idaho CountY-----------------Valley CountY-----------------Adams, Payette,...and Gem Counties ________________________ _ Boise County ___ --------------Ada, Owyhee, Elmore, and Custer..._____________ _ Spruce Pine district ____________ Madison County and Haywood County _____________________ _..._ Zirconia district ___________ ----Macon, Jackson, and Clay Counties __ ---- _______________ -- __ Crystalline |
 | | Report (issue) |
| Inc. 3300 Penrose Place, P.O. Box 9140, Boulder, Colorado 80301 GSA Books Science Editor Campbell Craddock...presented at a 2-day symposium, held in Durango, Colorado, May 1984, in conjunction with the Rocky Mountain... schist, with biotite, muscovite, hematite and quartz, characteristic of specimens collected well above...potassium feldspar shows cross-hatched twinning, and quartz is colorless. North is to the right, and the long...Premo Zircon geochronology of Precambrian rocks in southeastern Wyoming and northern Colorado ...... |
 | | Journal (article/letter/editorial) |
| Fertile granites of Precambrian rare-element pegmatite fields" is geochemistry controlled by tectonic...Fertile granites of Precambrian rare-element pegmatite fields: is geochemistry controlled by tectonic...twenty fertile granites and their rare-element pegmatite aureoles was examined to correlate their tectonic... Tectonic control on geochemistry of granite-pegmatite suites is poor and secondary to the fundamental...genetically conditioned twofold subdivision of pegmatite categories: (i) A broadly diversified spectrum |
 | | Report (volume) |
| --------------------------- Rowley or Reliance mine, by J. A. ~acKallor_____________ PimaCountY----...claims_______________________________________ Pinal County _________________________ ------- ______ -----__...-----__ Santa Cruz CountY---------------------------------------Santo Ni:iio mine, by D. H. Kupfer__...____ Yavapai CountY----------------------------------------------Copper Basin district _______ ------...--------------__ Commercial mine ______ ------------------------------__ Copper Hill mine __________ -------- |
 | | Report (issue) |
| INTRUSIVE ROCKS OF COLORADO By Edward J. Young Prepared in cooperation with The Colorado Mining Industrial Development...Development Board and the Colorado Geological Survey This report is preliminary and has not been edited...intrusive rocks of Colorado » » » *«» In pocket Laramide-Tertiary intrusive rocks of Colorado By Edward...intrusive rocks in the State of Colorado, geologic age localities, mining districts, localities of chemically...This information is shown on the State map of Colorado (scale 1:500,000) accompanying this report. In |
 | | Report (issue) |
| Geology and Mineral Resources New Mexico Institute of Mining and Technology Socorro, NM 87801 ginger@gis.nmt...of the beryl production from the Harding pegmatite, Taos County. Current drilling in the Apache Warm Springs...were discovered in the Victorio Mountains, Luna County in the early 1900s. Gulf Minerals Resources, Inc...porphyry Mo and W-Mo-Be skarn deposits northwest of Mine Hill and south of Middle Hills. At a cut-off grade...Mountain, Otero County and in the molybdenum porphyry deposit at Questa, Taos County, although not in |
 | | Book |
| mid-1957, of vvhich 70% is in New Mexico, 16% in Colorado, Utah, and Arizona, and 8% in Wyo1ning. These...doubtless the U.S.S.R., likewise established uranium mining industries. These efforts in the Reid and in the...siliceous and Ruoritic types, and the oxidized Colorado Plateau deposits are desc1ibed vvith those that...origin, e.g., Blind River, \i\litwatersrand, and Colorado Plateau. The writer has attempted to present equitably.... . . . 165 180 182 Chapter 5: RADIOACTIVE PEGMATITE DEPOSITS Geological Characteristics of Pegmatites |
 | | Report (volume) |
| THE BLACK CANYON OF THE GUNNISON A close look at a great American canyon its rocks, its age, and how...Wall, Black Canyon of the Gunnison National Monument. Greatest cliff in Colorado, Painted Wall averages...weathering along joints. THE BLACK CANYON OF THE GUNNISON TODAY AND YESTERDAY By WALLACE R. HANSEN GEOLOGICAL............... Why the Black Canyon crosses the Gunnison uplift............................ 1 6 9 12 14...Precambrian........ Gneiss............................. Quartz-mica schist.................. Amphibolite..... |
