 | | Report (volume) | | publication] Page (A) The New World or Cooke City mining district, Park County, Mont., by T. S. Levering_______... (B) Recent mining developments in the Creede district, Colo., by E. S. Larsen._____________________...geologic map and sections of the New World mining district, Mont. Wyo___-______--___--___________ 2. Cooke...6. Correlation diagram of the New World mining district and surrounding region____________________________________...Republic Creek, Mont.; B, Mottled limestone, the lower massive cliff-forming member of the Gallatin formation; |  | | Journal (article/letter/editorial) | | Silver Mining Camp in Colorado T he Creede mining district, located at a lofty elevation of 10,000 feet,...that would later be known as the Amethyst vein system (a.k.a. Amethyst fault system), host to such well-known...well-known mines as the Amethyst, Last Chance, Commodore, and Bachelor. The mining encampment grew from...County, was the center of mining activities for the district and from 1891 through 1985 produced 85.7 million...Creede mining district showing the main silver-bearing veins and the major mines of the district. Cartography |  | | Journal (issue) | | Tour loop showcases 17 miles of the old mining district and spectacular mountain scenery. fter the ores...Creede’s attractions include a historic mining district with an underground-mine tour and an underground...indicated large, continuous vein systems. After tracing the largest vein on the surface for more than...than two miles, they named it the Amethyst Vein after its primary component—distinctive, lavender-colored...driving tunnels into the rhyolite to reach the Amethyst Vein, they also erected a string of ramshackle cabins |  | | Journal (issue) | | that Dead Camel jasper, discovered by Philip Stephenson, is a variety of Oregon jasper. It is actually...ways silicon dioxide presents. I showed a gorgeous jasper that would qualify as an example of what I have...with quartz from the Herodsfoot mine (Liskeard district, Cornwall). BOB JONES IROCKS.COM WIKIPEDIA...to be a dry one, and both Lea pounds of agate, jasper, petrified wood, stick to the crystal clusters...Photos by Steve Voynick 34 Rock & Gem Some Amethyst Vein material has unusual pinkish-red colors and |  | | Report (volume) | | 718 GEOLOGY AND ORE DEPOSITS OF THE ' CREEDE DISTRICT, COLORADO BY WILLIAM H. EMMONS AND ESPER S................................................. Amethyst mill............................................................................ 61 61 62 62 Lower member.................................................................................... 88 Amethyst fault system....................................Extent of Amethyst vein before erosion............................. 132 Gases in Amethyst lode...... |  | | Journal (article/letter/editorial) | | Bulldog Mine) A Legacy Rich In Silver Creede Mining District, Mineral County, Colorado, USA By Ken Kucera ...baryte, galena, sphalerite, and quartz variety amethyst. Table of Contents 2 Introduc�on 5 Loca�on...Mine 41 Appendix - Geology & Mineralogy Creede District 44 References In January 1985, after producing...of mining ended in the renowned Creede Mining District. On August 5, 1992, Homestake Mining Company,...historically important silver mine in the Creede Mining district, Mineral County, Colorado, known as the Bulldog | | | Journal (article/letter/editorial) | | Bulldog Mine) A Legacy Rich In Silver Creede Mining District, Mineral County, Colorado, USA By Ken Kucera ...baryte, galena, sphalerite, and quartz variety amethyst. Table of Contents 2 Introduc�on 5 Loca�on...Mine 41 Appendix - Geology & Mineralogy Creede District 44 References In January 1985, after producing...of mining ended in the renowned Creede Mining District. On August 5, 1992, Homestake Mining Company,...historically important silver mine in the Creede Mining district, Mineral County, Colorado, known as the Bulldog |  | | Journal (article/letter/editorial) | | Bulldog Mine) A Legacy Rich In Silver Creede Mining District, Mineral County, Colorado, USA By Ken Kucera ...baryte, galena, sphalerite, and quartz variety amethyst. Table of Contents 2 Introduc�on 5 Loca�on...Mine 41 Appendix - Geology & Mineralogy Creede District 44 References In January 1985, after producing...of mining ended in the renowned Creede Mining District. On August 5, 1992, Homestake Mining Company,...historically important silver mine in the Creede Mining district, Mineral County, Colorado, known as the Bulldog | | | Journal (article/letter/editorial) | | Bulldog Mine) A Legacy Rich In Silver Creede Mining District, Mineral County, Colorado, USA By Ken Kucera ...baryte, galena, sphalerite, and quartz variety amethyst. Table of Contents 2 Introduc�on 5 Loca�on...Mine 41 Appendix - Geology & Mineralogy Creede District 44 References In January 1985, after producing...of mining ended in the renowned Creede Mining District. On August 5, 1992, Homestake Mining Company,...historically important silver mine in the Creede Mining district, Mineral County, Colorado, known as the Bulldog |  | | Report (issue) | | 1909, the writer spent 10 days in the Carrville district, Trinity County, Cal., and, incidental to other...written. In November, 1910, another visit to the district was made, but inclement weather handicapped the...The growing economic importance of this min ing district merits notice, and it is hoped that this brief...Alien, of Aliens Camp; and many others in the district. Mr. Waldemar Lindgren, chief geologist of the...vol. 11,1903, p. 155. «Hughes, A. F., Stripping a vein by hydraulicking: Min. and Sci. Press, Dec. 11,1909 |  | | Journal (article/letter/editorial) | | Amethyst Deposits of the Thunder Bay Area, Ontario, Canada DANIEL E . KILE 333 Salem Street Aurora,...production been established from this area. The amethyst mined here has found use in jewelry, building...material. Location and Topography The principal amethyst mines in this region are located approximately...Peninsula. There is no duty charged on field collected amethyst brought back into the United States. Historical...Background Figure 1: Overview of the Thunder Bay Amethyst mine quarry in 1982. Elbow Lake is in the background |  | | Journal (issue) | | vary for agates in volcanic rocks, hydrothermal vein agate or sedimentary agates (Götze, 2011). Many...volcanic agates but is also common in hydrothermal vein agates and sedimentary agates. Fig. 3 Agate from...original mineral. 12 Minerals in hydrothermal vein agates Fig. 5 Pseudomorphs in agates from Liebgensmühle...genesis of vein agates represents a completely separate form of agates. Hydrothermal vein agates can...to the agates from volcanic rocks, the genesis of vein agates is associated with hydrothermal processes |  | | Report (volume) | | _______________ CeboUa district..______________________________ Upper Uncompahgre district. ______ _________________________...Uranium occurrences___________ ________ __ Bonanza district..____________________ ___________________ General...____________ Lower Uncompahgre (Ouray or Paquin) district.__________ Telluride district _________________________...district____________________________________ La Plata district._________________________ Engineer Mountain d...district________________________ Burrows Park (Whitecross) district-.___________________ Carson Camp district____ |  | | Journal (article/letter/editorial) | | Environment of Ore Deposition in the Creede Mining District, San Juan Mountains, Colorado: Part VI. Maximum...Maximum Duration for Mineralization of the OH Vein WAYNE R. CAMPBELL AND PAUL B. BARTON† U.S. Geological Survey...the epithermal silver-lead-zinc deposit in the OH vein at Creede, Colorado. Two initial textures are considered:...paper deals with a single vein from a productive epithermal deposit, the OH vein at Creede, Colorado. For...evidence that the ore-forming system for the OH vein was other than a single, complex, and evolving hydrothermal |  | | Book | | minerals and gemstones (of the latter garnet, amethyst and jasper are typi cal). The mines do not need pinpointing...torbernite, cuprite, are but a few; and amethyst and jasper are not rare. Wheal Gorland (O.S. map 190...concen tration is to the west, in the Tavistock district. Singling out a couple at random, South Tamar...china clay pits often provide good quartz and amethyst crystal groups, as well as turquoise, wavellite...crystals can be found, with patches of very fine red jasper. Axinite is also found in Llanddwyn Island, in |  | | Report (issue) | | Gangue minerals: Deposit model: Epithermal gold vein (25b, 25c, 25d) Geologic description: "....basaltic...minerals: Pyrite, Quartz Deposit model: Epithermal Au vein (25b, 25c) Geologic description: Zone of north-striking...in sea cliffs. At the cliff base in the tuff, the vein zone is 10.5 feet wide and contains five sulfide-bearing...175 feet up the cliff face in the andesite, the vein zone is 50 feet wide, and contains 12 veins, but...Calcite, Rhodonite Deposit model: Epithermal Au vein (25b, 25d) Geologic description: Most gold in locally |  | Doe, B. R., Steven, T. A., Delevaux, M. H., Stacey, J. S., Lipman, P. W., Fisher, F. S. (1979) Genesis of ore deposits in the San Juan volcanic field, southwestern Colorado; lead isotope evidence. Economic Geology, 74 (1) 1-26 doi:10.2113/gsecongeo.74.1.1 | Journal (article/letter/editorial) | | derived from them. The fact that some of these vein ores are now in Cenozoicigneousrocks indicatesthe... Some other deposits (Summitville, Jasper, Red Mountain district) have values of 2ø•Pb/•ø4Pbsimilar to...applied specificallyto the ores in the Creede district by Bethke et al. (1973) and by Stevenand Eaton...Eaton (1975) and to ores of the Eureka district by Casadevalland Ohmoto (1977). Interaction between lneteoric...three-fourths of which has come from the Creede district near the center of the field. The volcanichistory |  | | Book (edition) | | ........................................... . Amethyst ............................................................ _.... , .... _. ______ Ledbetter amethyst mine ...........................................but the quantity of gems to be expected from tho vein is still a matter of doubt. Further prospecting...siliceous material, producing red. brown, and yellow jasper, with gray and white matrix, consisting in pa.rt...shown up well by the spots and mottlings of dark jasper in lighter-colored matrix. Some of the petrified |  | | Journal (article/letter/editorial) | | rieties (the latter most notably being agate and jasper). A l though both these groups are composed of...transparency and include rock crystal (colorless), amethyst (violet to purple), smoky (light to dark brown)...patterns and colors. Chert and flint are similar to jasper in that they are opaque and sometimes colorful...Stephen's stone," or "sowbelly" agate. Agate or jasper replacement of wood and dinosaur bone often results...quartz-tridymite inversion tempera ture of 870°C. At much lower temperatures, chalcedony and agate com monly form |  | | Report (issue) | | picture of a highway restaurant at Sibley. (ii) AMETHYST DEPOSITS OF ONTARIO by M.A. Vos Geological Guidebook...purpose of this guidebook is to give an account of amethyst, describing its properties, lore, uses as a gemstone...purple coloured robes. Ontario has recently1 chosen amethyst, the purple variety of quartz, to be the official...of the clear crystal referred to in names like Amethyst Bay in Thunder Bay or Quartz Lake in Maria Township...used eleven times; amethyst is used five times; flint is used nine times; jasper is used six times; and |  | | Book (volume) | | Department of Conservation; and on the Four Peaks amethyst deposit in Arizona by Dr. F. W. Galbraith of the...Hiddenite crystals Hiddenite crystal Map of Pala District Clays and crystals in pocket Vanderberg Mine Pile...mass Ramona mines Rock crystal and amethyst Cut and rough amethyst Asteriated rose quartz sphere Rough...(color) . . . . . . . . . . . . . . . . Orbicular jasper cabochons Tampa Bay coral geode Turritella specimen...forms it is familiar to readers as bloodstone, jasper, agate, carnelian, etc. Deposited from solution |  | | Book | | and fascinating minerals as chalcedony and jasper, amethyst and tourmaline. Two chapters describe the...Director, apart from the photographs of amber, and jasper and agates, which are reproduced by permission...feel of wet feet . . . or of following a pegmatite vein into difficult rocks, where an as-yet-unrifled druse...That little stone glowing red ina tidal pool is jasper. The pitted pebble of unexciting appearance may...the hurly-burly, although some stones, including amethyst and topaz, tend to fade on prolonged exposure |  | | Journal (issue) | | mineral at all, but a cross section of Maryellen jasper (stromatolite) from Minnesota. I have collected...difference in structure between thomsonite and Maryellen jasper. The picture in the middle of the same page labeled...looks like the top profile picture of Maryellen jasper. —Pamela Hecht via e-mail Apparently, my research...15—called binghamite by one reader and Maryellen jasper by the other—from a nearby label that read “thomsonite...OREGON: Treasures from the Earth Rock and Gem Show; Lower Umpqua Gem & Lapidary Society; Reedsport Community |  | | Book | | and the Central Mining District, Grant County Burro Mountains Apache No, 2 District Lake Valley Caballo...Mountains Chloride District Hansonburg District Socorro Area New Placers District Grants Area Nacimiento...Uplift Harding Pegmatite Ojo Caliente Pegmatite District 4. COLORADO MINES nm — On 29 DEPOSITS MEXICO...Luis Valley and the San Juan Mountains Bonanza District 33 33 36 37 46 54 bP) 57 59 60 64 68 74 78 80...Sneffels-Telluride District Red Mountain District Cement Creek Tungsten Area Ouray (Uncompahgre) District Poughkeepsie |  | | Book | | rubies, sapphires, aquamarines, garnets, topaz, amethyst and golden beryl are among the historic gems of...Carolina. An enthusiastic family found and mined an amethyst deposit in South Carolina which is pro ducing...in the nation. sapphires, garnets, amazonite, amethyst, smoky quartz, rose quartz, williamsite and other...dogwood, the delicate pink trailing arbutus, the amethyst colored longspur violets, brighten the fresh new...good reason, is the Smithsonian, located in the District of Columbia between Maryland and Virginia, where |
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