 | | Journal (article/letter/editorial) | | Colorado Downloaded by [University of California, San Diego] at 12:38 29 June 2016 ED RAINES Analytica...anonymous. Downloaded by [University of California, San Diego] at 12:38 29 June 2016 Figure 2: The three...three portions (Front Range, central, and San Juan Mountains) of Colorado mineral belt. Some representations...mineral belt simply show it merging with the San Juan Mountains in the southwest. Several factors control... ------\ I Downloaded by [University of California, San Diego] at 12:38 29 June 2016 \ VIi" Outcrop I |  | | Report (issue) | | samples, is present in tetrahedrite and rare acanthite. Although gold was detectable in trace amounts...stratigraphy, structure, and petrology of the western San Juan region and the Lake City area are discussed by...the Lake City area. Veins from the western San Juan mountains range in age from about 10-30 m.y. (Slack...60 ft above and to the west of the road to Lake San Cristobal. A detailed map of the Gladiator mine was...ite, Ag-bearing tetrahedrite, marcasite, and acanthite. Principal gangue minerals are quartz, which comprises |  | Foley, Nora K., Caddey, Stanton W., Byington, Craig B., Vardiman, David M. (1993) Mineralogy, mineral chemistry, and paragenesis of gold, silver, and base-metal ores of the North Amethyst vein system, San Juan Mountains, Mineral County, Colorado. Professional Paper 1537. US Geological Survey doi:10.3133/pp1537 | Report (issue) | | Ores of the North Amethyst Vein System, Sari Juan Mountains, Mineral County, Colorado U.S. GEOLOGICAL...Base-Metal Ores of the North Amethyst Vein System, San Juan Mountains, Mineral County, Colorado By NORA K. FOLEY...structures in volcanic rocks of the San Luis and Bachelor calderas of the San Juan volcanic field of southwestern...base-metal ores of the North Amethyst vein system, San Juan Mountains, Mineral County, Colorado / by Nora K. Foley...ILLUSTRATIONS FIGURE 1. 2. 3. 4. 5. 6. 7. 8. Map of the San Juan volcanic field, southwestern Colorado ....... |  | | Journal (article/letter/editorial) | | Creede Mining District, Mineral County, Colorado, USA By Ken Kucera Fabulous mineral specimens from the...Beau�ful, rich vein slice – silver, baryte, and acanthite (a�er argen�te). From the Bulldog Mountain Mine...elevation of 8,799 feet in southwest Colorado’s San Juan Mountains. In some circles, it’s referred to as the...comprised mostly of wire and massive silver, acanthite (a�er argen�te), and baryte. 67 stope, Puzzle...“high grading”. Nests of aesthe�c wire silver and acanthite (a�er argen�te) in a matrix of lavender, euhedral | | | Journal (article/letter/editorial) | | Creede Mining District, Mineral County, Colorado, USA By Ken Kucera Fabulous mineral specimens from the...Beau�ful, rich vein slice – silver, baryte, and acanthite (a�er argen�te). From the Bulldog Mountain Mine...elevation of 8,799 feet in southwest Colorado’s San Juan Mountains. In some circles, it’s referred to as the...comprised mostly of wire and massive silver, acanthite (a�er argen�te), and baryte. 67 stope, Puzzle...“high grading”. Nests of aesthe�c wire silver and acanthite (a�er argen�te) in a matrix of lavender, euhedral |  | | Journal (article/letter/editorial) | | Creede Mining District, Mineral County, Colorado, USA By Ken Kucera Fabulous mineral specimens from the...Beau�ful, rich vein slice – silver, baryte, and acanthite (a�er argen�te). From the Bulldog Mountain Mine...elevation of 8,799 feet in southwest Colorado’s San Juan Mountains. In some circles, it’s referred to as the...comprised mostly of wire and massive silver, acanthite (a�er argen�te), and baryte. 67 stope, Puzzle...“high grading”. Nests of aesthe�c wire silver and acanthite (a�er argen�te) in a matrix of lavender, euhedral | | | Journal (article/letter/editorial) | | Creede Mining District, Mineral County, Colorado, USA By Ken Kucera Fabulous mineral specimens from the...Beau�ful, rich vein slice – silver, baryte, and acanthite (a�er argen�te). From the Bulldog Mountain Mine...elevation of 8,799 feet in southwest Colorado’s San Juan Mountains. In some circles, it’s referred to as the...comprised mostly of wire and massive silver, acanthite (a�er argen�te), and baryte. 67 stope, Puzzle...“high grading”. Nests of aesthe�c wire silver and acanthite (a�er argen�te) in a matrix of lavender, euhedral |  | | Journal (article/letter/editorial) | | of the Rio Grande in the scenic and rugged San Juan Mountains of southwestern Colorado. Although silver...4. Thick wires of silver, to 2 cm, growing on acanthite. The specimen is 2.0 ⫻ 3.1 cm and is from the...is being carried out in the mining district by San Juan Silver Mining Joint Venture through a targeted...Rosemeyer has mined and collected minerals in the San Juan Mountains for the past forty years and is now semiretired...research and collecting at localities in the San Juan Mountains. =VS\TL :LW[LTILY6J[VILY |  | | Report (issue) | | principally produced Ag, which occurs in freibergite, acanthite, and native silver. Three stages of mineralization...one of many Ag-Au mining districts in the San Juan Mountains. The district lies within and on the northern...which is one of about 18 large calderas in the San Juan volcanic field (Steven and Lipman, 1976). The...caldera. The Uncompahgre caldera along with the San Juan caldera in the Silverton area were formed at about...of the Lake City caldera. Veins in the Western San Juan volcanic field range from 30 to 10 m.y. in age |  | | Journal (article/letter/editorial) | | Fallon discovered gold and silver in the high mountains near where the town of’lelluride would one day...specimens. This article deals with that portion of San Miguel County extending from north of Telluride beginning...origins in the establishment of county lines when San Miguel County was created in 1883. Geologically,...Silverton caldera of San Juan County. It should be noted that before the creation of San Miguel County, the...the Telluride district was called the Upper San Miguel district, and this name is the one that appears |  | | Journal (article/letter/editorial) | | and mineralogy of the Eldorado mine in the San Juan Mountains of southwestern Colorado, one of the many...different form—tourist gold. Every summer the San Juan Mountains draw thousands of tourists to the area to...from the territory of New Mexico into the San Juan Mountains in search of gold. Although placer gold was...languished. By 1871 there was renewed interest in the San Juans, and the quest for precious metals brought...Almost all of the veins discovered in the San Juan Mountains were in rugged mountain terrain and could |  | | Report (issue) | | American Flats Wilderness Study Area, western San Juan Mountains, Colorado* by Ken Hon, Dana J. Bove, and...Counties, Colorado. SUMMARY The western San Juan Mountains, including the American Flats area, are part...The earliest volcanic activity in the western San Juan volcanic field is represented by andesitic to...the largest of these centers is the Uncompahgre-San Juan caldera complex and the associated Silverton caldera...eruptions ceased at about 27 m.y. in the western San Juan volcanic field. Miocene volcanic and intrusive |  | | Report (chapter) | | than 1000 m by pre-existing faults; in the San Juan Mountains, Colorado, in particular, earlier fractures...also base metals. Silver occurs as argentite (or acanthite) and arsenic- or antimony-bearing sulphosalts...caldera complexes comparable with those in the San Juan Mountains, Colorado (see below). Uplift of fault blocks...the Mexican epithermal deposits argentite (and acanthite) and the ruby silvers are always deposited later...carbonatization fringing the veins. At Tayoltita, San Dimas district (Fig. 1), volcanic rocks and an intercalated |  | | Journal (article/letter/editorial) | | southwestern Colorado on the edge of the San Juan Mountains just south of where Willow Creek enters the...It also occurred as a white coating on galena. Acanthite was usually associated with native silver. Rarely...unmodified to highly modified. Native silver and acanthite were occasionally found associated with chalcopyrite...typically less than 0.3 mm in size. Dendritic black acanthite may occur on the same specimen but is not directly...Wires of native silver partially coated with acanthite, Amethyst vein, Commodore No. 5 mine. Field of |  | | Report (issue) | | transcript andfigures of a talk presented at the San Juan Volcanic Field symposium, Rocky Mountain GSA,...silver-rich, with sphalerite, galena, sulfosalts, acanthite, native silver, and abundant barite gangue. Previous...mineral assemblages precipitated are rich in acanthite and native silver, also in accordance with observed...sphalerite and galena rich ores, with increasing acanthite, sulfosalt, native silver, and barite contents...deposition in the Creede Mining District, San Juan Mountains, Colorado: Part in. Progress toward interpretation |  | | Journal (article/letter/editorial) | | arsenic in amounts up to several percent. Pynte, acanthite, polybasite, and silver pseudomorphs after pyrargyrite...reported. It occurs as an alteration product of acanthite, dyscrasite, and silver. Pyrargyrite is relatively...suggest. It is commonly associated with proustite, acanthite, tetrahedrite, stephanite, miargyrite, polybasite...Arizona occurrences, including those of the Cerbat Mountains, Mohave County; the Saddle Mountain district ...crystals to 2 cm associated with native silver and acanthite are reported from Batopilas, Chihuahua. Material |  | | Journal (article/letter/editorial) | | district, with another 50 million pounds mined in San Juan County (Henderson 1926). During the twentieth...in the Sneffels and Telluride districts of the San Juan portion of the mineral belt. Breccia pipes and...principal ore minerals included native silver, acanthite after argentite, pyrargyrite, proustite, and the...scattered across partially resorbed crystals of acanthite after argentite. Although this is a truly ugly...silver-copper ore consisting of partially resorbed acanthite after argentite, with pearceite, from the Seven |  | | Journal (article/letter/editorial) | | Carolina State University] at 12:59 07 January 2015 SAN JUAN COUNTY, COLORADO 94 ROCKS & MINERALS WILLIAM...about 3 miles northwest of Silverton in the San Juan Mountains of southwestern Colorado and is the type...CONTOUR INTERVAL 200' ZUNI MINE & VICINITY San Juan County, CU include the Cow Creek, Larsen, Carson...forming the southern and southwestern edges of the San Juan and Silverton calderas (Hon and Lipman 1989)....(1992). Figure 6. Looking north across the San Juan Mountains from the summit of Anvil Mountain. Photo |  | | Journal (issue) | | part of a “Lava Cap” agate from Deming, New Mexico (USA) c – globular aggregate of iron oxide within the... Fig. 8 Sedimentary Dryhead agate from Montana (USA); the close up shows a violet fluorite cube, which...sedimentary rocks from the Dryhead area, Montana/USA. Mineralogical Magazine, 73, 673-690. Götze, J.,...former mining village of Aouli. At the foot of the mountains in this elongated agate district we eventually...from the Creede District, Mineral County, Colorado USA Philip Persson - Philip.m.persson@gmail.com A notable |  | | Report (issue) | | The Triangle of Colorado Mountains of Minerals Contributors David W. Bunk, Robert B. Cook, Don Earnest... Contents PAGE4 PAGE 10 4 The San Juan Triangle of Colorado Ho for the San Juans! by Duane A. Smith, Mark...square kilometers, the San Juans are some of the highest and most rugged mountains in the state. Hundreds...from these mountains. However, it was not until the last 25 years of the 1800s that the San Juans began...mining engineer Thomas ''T.A." Rickard called the San Juans one of Colorado's four great mining regions |  | | 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...Pyrargyrite, Proustite, Silver, Argentite, Acanthite, Erythrite, Pryrostilpnite, Xanthoconite) Brown Derby...Mountain project (Homestake mine) Creede (Silver, Acanthite, Argentite, Fluorite, Barite, Quartz var. Amethyst...Freibergite, Tetrahedrite, Miargyrite) Idarado mine (See San Miguel County) Michael Breen mine Mountain Monarch |  | | Report (issue) | | Utah-Federal Bldg., Rm. 8105,125 South State St. SAN FRANCISCO, California-Customhouse, Rm. 504.555 Battery...Sneffels-Telluride and Camp Bird Mining Districts, San Juan Mountains, Colorado By FREDERICKS. FISHER Gold in...Sneffels-Telluride and Camp Bird mining districts, San Juan Mountains, Colorado/ by Frederick S. Fisher. Gold in...Sneffels-Telluride and Camp Bird mining districts, San Juan Mountains, Colorado Abstract Fll Introduction Fll Geology...RESERVES The Tintic district is in the East Tintic Mountains near the east-central boundary of the Great Basin |  | | 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 |  | Cunningham, C.G., Aparicio N., Hugo, Murillo S., Fernando, Jimenez, Nestor C., Lizeca B., J. L., McKee, E.H., Ericksen, G.E., Franz, Tavera V. (1994) The relationship between the Porco, Bolivia, Ag-Zn-Pb-Sn deposit and the Porco caldera. Open-File Report Vol. 1994 (94-238) US Geological Survey doi:10.3133/ofr94238 | Report (issue) | | The primary Ag minerals, chiefly pyragyrite, acanthite, and stephanite, are most abundant in the upper...P 4 = propylitized Porco Tuff from west of Cerro San Cristobal; P 5 = Huayna Porco stock; P 10 = Apo Porco...P3, Table 2) crops out about 1 km west of Cerro San Cristobal; it contains fragments having the same...multimineralic, banded, and locally crustiform and vuggy. The San Antonio vein, one of the principal producing veins...mining, which presently is at the 3,980 level on the San Antonio vein. It has long been known that many of |  | | Journal (article/letter/editorial) | | Symposium, Contributed Papers in Specimen Mineralogy Acanthite, Mont Saint-Hilaire, Quebec, 101 Alabama Mineral...Colorado, calcite, 298-310; Rocket mine, 46-50; San Juan Mountains mineral update, 180-87 Columbite-tantalite...Vanadinite, Mibladen, Morocco, 40-42; Wulfenite, San Francisco Mine, Magdalena, Sonora, Mexico, 120-22...Geology and Mineralogy of the New Idria District, San Benito and Fresno Counties, California, W. S. Wise...Quebec, 131 Metatyuyamunite, Arkansas, 165 Mexico, San Francisco mine, 120-22 Meyer, H . W., Florissant |
|
Bulldog Mountain Mine, Creede Mining District, Mineral County, Colorado, USA