Economic geology of the Central City District, Gilpin County, Colorado / by Paul K. Sims, A.A. Drake, Jr., and E.W. Tooker.
| Author/creator | Sims, P. K. |
| Format | Book |
| Publication Info | Washington : U.S. Govt. Print. Off, 1963. |
| Description | x, 231 pages : illustrations, maps (some color), diagrams, tables and portfolio (folded maps (some color)) ; 29 cm. |
| Subjects |
| Portion of title | Central City District, Gilpin County, Colorado |
| Series | Geological Survey (U.S.). Professional paper ; 359 Geological Survey professional paper 359. ^A16492 |
| Contents | Abstract -- Introduction -- Purpose and scope of report -- Location and accessibility -- Topography and drainage -- Climate and vegetation -- Previous geologic studies -- Fieldwork -- Acknowledgments -- Production -- History of mining -- History of ore treatment -- Sampling works -- General geology -- Precambrian rocks -- Gneissic rocks -- Microcline-quartz-plagioclase-biotite gneiss -- Biotite gneisses -- Lime-silicate gneiss and related rocks -- Amphibolite -- Cordierite-amphibole gneiss -- Granitic rocks -- Granodiorite -- Quartz diorite and associated hornblendite -- Biotite-muscovite granite -- Pegmatites -- Tertiary igneous rocks -- Leucocratic granodiorite porphyry -- Alkalic syenite porplyry -- Quartz monzonite porphyry -- Bostonite porphyry -- Trachytic granite porphyry -- Quartz bostonite porphyry -- Radioactivity of the porphyritic rocks -- Structure of the Precambrian rocks -- Foliation and lineation -- Folds -- Structure of the Tertiary igneous rocks -- Joints -- Faults -- Character and classification -- Faults of pre-Laramide age -- Northwestward-trending faults -- North-northeastward-trending faults -- Faults of Laramide age -- Eastward-trending faults -- East-northeastward-trending faults -- Northeastward-trending faults -- Origin and sequence of development -- Summary of geologic history -- Ore deposits -- Veins -- Stockworks -- Mineralogy -- Pyrite -- Sphalerite -- Galena -- Chalcopyrite -- Marcasite -- Molybdenite -- Chalcocite -- Covellite -- Bornite -- Tetrahedrite-tennantitic -- Enargite -- Pearceite -- Chalcostibite -- Ruby silver -- Gold -- Silver -- Gold -- Silver -- Native bismuth -- Pitchblende -- Hematite -- Hydrous iron oxides -- Wolframite -- Ferberite -- Sylvanite -- Fluorite -- Autunite and meta-autunite -- Metatorbernite and torbernite -- Quartz -- Kasolite -- Ankerite, siderite, rhodochrosite, and calcite -- Cerussite -- Smithsonite -- Malachite and azurite -- Barite -- Epsomite -- Copper sulfates -- Zippeite, johannite, and gypsum -- Relation of gold and silver to sulfide and gangue minerals -- Fineness of gold and silver -- Classification of veins -- Pyrite veins -- General character and appearence -- Grade -- Galena-sphalerite veins -- General character and appearence -- Grade -- Local variants of ores -- Telluride-bearing veins -- Enargite-bearing veins -- Fluorite-bearing veins -- Uranium-bearing veins -- Hypogene mineral zoning -- Central zone -- Intermediate zone -- Peripheral zone -- Barren zone -- Paragenesis of vein minerals -- Uranium stage -- Pyrite stage -- Base-metal stage -- Minor elements in ores -- Minor elements in sulfide minerals -- Ore shoots -- General character -- Size and shape -- Regional attitude -- Structural controls -- Physical character of the wallrock -- Structure of the wallrock -- Irregularities along a fault -- Vein intersections or junctions -- Explosion breccias -- Persistence at depth -- Wallrock alteration -- Distribution of alteration products -- Mineralogic and chemical changes in the wallrocks -- Supergene alteration -- Gold enrichments -- Silver enrichment -- Genesis of ores -- Age -- Origin of sulfide ores -- Origin of uranium ores -- Origin of telluride ores -- Suggestions for prospecting -- Future of district -- Descriptions of mines and veins -- Quartz Hill area -- Nevada Hill and Prosser Gulch areas -- Upper Russell Gulch area -- Willis Gulch and lower Russell Gulch areas -- Central, Mammoth, Gregory, Bobtail, and Bates hills -- Chase Gulch, Maryland Mountain, and Winnebago Hill areas -- Silver Hill area -- Nigger Hill area -- Upper Chase Gulch area -- References cited -- Index. |
| Local note | Joyner- FOR JOYNER LIBRARY HOLDINGS OF THE SERIES, GEOLOGICAL SURVEY PROFESSIONAL PAPER, SEARCH BY CALL NUMBER QE75 .P9. |
| General note | "Prepared on behalf of the U.S. Atomic Energy Commission." |
| Bibliography note | Bibliography : pages 226-228. |
| Issued in other form | Online version: Sims, P.K. (Paul Kibler), 1918-2011. Economic geology of the Central City District, Gilpin County, Colorado |
| LCCN | gs 63000299 |
| GPO item number | 0624 |
| Govt. docs number | I 19.16:359/ |
Availability
| Library | Location | Call Number | Status | Item Actions |
|---|---|---|---|---|
| Joyner | General Stacks | QE75 .P9 NO. 357-360 | ✔ Available | Place Hold |