 | | Report (issue) | | GEOLOGICAL SURVEY PRELIMINARY SCIENTIFIC RESULTS OF THE CREEDE CALDERA CONTINENTAL SCIENTIFIC DRILLING PROGRAM...94-260-G 2001 STABLE ISOTOPE GEOCHEMISTRY OF THE CREEDE FORMATION AND IMPLICATIONS FOR THE ORIGIN OF FLUIDS...RESPONSIBLE FOR HYDROTHERMAL VEIN MINERALS IN THE CREEDE MINING DISTRICT By Robert O. Rye U.S. Geological Survey...epithermal silver and base-metal ores of the Creede mining district first proposed by Bethke and Rye (1979)...circulated deeply, rose in the northern part of the district, and mixed with overlying meteoric waters along |  | | Report (issue) | | GEOLOGICAL SURVEY PRELIMINARY SCIENTIFIC RESULTS OF THE CREEDE CALDERA CONTINENTAL SCIENTIFIC DRILLING PROGRAM...AND AUTHIGENIC MINERAL DISTRIBUTIONS IN THE OLIGOCENE CREEDE FORMATION, COLORADO, USA By Daniel Larsen...U.S. Government. ABSTRACT The Oligocene Creede Formation represents an exceptionally well-preserved...(CSDP) core provide a record of depositional and mineral-water interaction processes following caldera collapse...authigenic mineral distributions also provide information regarding the role of the Creede Formation in the |  | | Report (issue) | | GEOLOGICAL SURVEY PRELIMINARY SCIENTIFIC RESULTS OF THE CREEDE CALDERA CONTINENTAL SCIENTIFIC DRILLING PROGRAM...Open-File Report 94-260-A 2001 OVERVIEW OF THE CREEDE CALDERA CONTINENTAL SCIENTIFIC DRILLING PROGRAM...drilled two continuously cored holes through the Creede Formation, a dominantly lacustrine volcaniclastic unit...unit that accumulated in the moat of the 26 Ma Creede caldera. The drilling was part of the U.S. Continental...epithermal Ag and base-metal ores of the Creede mining district (Bethke and Lipman, 1987) The principal |  | Bethke, P. M., Rye, R. O. (1979) Environment of ore deposition in the Creede mining district, San Juan Mountains, Colorado; Part IV, Source of fluids, from oxygen, hydrogen, and carbon isotope studies. Economic Geology, 74 (8) 1832-1851 doi:10.2113/gsecongeo.74.8.1832 | Journal (article/letter/editorial) | | Ore Depositionin the CreedeMining District, SanJuan Mountains,Colorado' Part IV. Sourceof Fluids from Oxygen...fluids responsiblefor formation of the nearsurface silver-basemetal vein depositsat Creede was measuredby direct...water and CO2 in the fluids associatedwith the formation of each of the minerals is given below (number...(number of determinationsgiven in parentheses): Mineral Sphalerite Quartz Illire aDn2o %o -81 to -54 (4)...system alternatelyandepisodically duringvein formation,and apparently therewas little mixing of the fluids |  | | Report (volume) | | 718 GEOLOGY AND ORE DEPOSITS OF THE ' CREEDE DISTRICT, COLORADO BY WILLIAM H. EMMONS AND ESPER S. LARSEN................................................. Mining and treatment of ores..................................................................... Creede formation.............................................59 59 59 59 59 60 CONTENTS. Chapter V. Creede formation..................................................................................... :... Calcite............................................... |  | | Thesis/Dissertation | | TDfl SbQ AEEAL GEOLOGY OF 0?HS CREEDE DISTRICT, COLORADO. By ' X ESEBR S* H B LARSEIT. S...Approved: The Areal Geology of The Greede Mining District, Esper 3. Larson. COKTEIIT3 Chapter I...series 22 Lower division Upper division The Creede formation The llacXenzie 26 .'-.fountain quartz latite...Megascopic Microscopic Weathering and outcrops Creede Formation Chapter V. Name, general nature, and occurrence...faults* II t Geology and ore deposits of Creede, Colorado, W. H. Emmons and 3. S. Lars en. Introduction |  | 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) | | Mineralogy, Mineral Chemistry, and Paragenesis of Gold, Silver, and Base-Metal Ores of the North Amethyst...Amethyst Vein System, Sari Juan Mountains, Mineral County, Colorado U.S. GEOLOGICAL SURVEY PROFESSIONAL...Alaska-Rm. 101, 4230 University Dr. • LAKEWOOD, Colorado-Federal Center, Bldg. 810 • MENLO PARK, California-Bldg...SPACE CENTER, Mississippi-Bldg. 3101 Mineralogy, Mineral Chemistry, and Paragenesis of Gold, Silver, and...Amethyst Vein System, San Juan Mountains, Mineral County, Colorado By NORA K. FOLEY, STANTON W. CADDEY, CRAIG |  | | Report (issue) | | deposit, from Baker (Abraham) Hot Spring, Juab County, Utah By David R. Zimbelman Open-File Report 88-41...and the Golconda and Sulphyr, Nevada hot spring mineral systems 5 SUMMARY Baker Hot Spring contains geochemically...spring mineral systems, such as at Golconda, Nevada, Sulphur, Nevada, and parts of Creede, Colorado, which...kilometers southeast of Fumarole Butte in Juab County, Utah, (figure 1) has recently deposited material...manganese and iron oxides mostly covered by porous calcite and consisted mostly of psilomelane and pyrolusite |  | | Report (issue) | | Control of Ore Deposition in the Creede District San Juan Mountains Colorado GEOLOGICAL SURVEY PROFESSIONAL...487 Prepared in cooperation with the Colorado State Metal Mining Fund Board Geology and Structural Control...Control of Ore Deposition in the Creede District San Juan Mountains Colorado , By THOMAS A. STEVEN and JAMES...487 ·Prepared in cooperation with the Colorado State Metal Mining Fund Board UNITED STATES GOVERNMENT...Rhyolite __________ ---- ____________ _ Huerto Formation ______________________________ . Quartz latite |  | | Report (issue) | | GEOLOGICAL SURVEY PRELIMINARY SCIENTIFIC RESULTS OF THE CREEDE CALDERA CONTINENTAL SCIENTIFIC DRILLING PROGRAM...DIAGENESIS AND FLUID INFILTRATION IN THE CREEDE CALDERA, COLORADO By Robert P. llchik1 Douglas Rumble III...DIAGENESIS AND FLUID INFILTRATION IN THE CREEDE CALDERA, COLORADO Robert P. Ilchik Douglas Rumble, III...minerals present in drill core recovered during the Creede Moat Drilling Project were examined to determine...hole CCM-2. These are, from top to bottom: 1) Creede Formation lacustrine turbidites; 2) volcanic megabreccia; |  | | Journal (article/letter/editorial) | | of Ore Deposition in the Creede Mining District, San Juan Mountains, Colorado: Part VI. Maximum Duration...reducing the uncertainties and establishing that ore formation, at least for the porphyry copper-skarn-epithermal...silver-lead-zinc deposit in the OH vein at Creede, Colorado. Two initial textures are considered: growth-banded...supporting the conclusion of rapid ore formation. While this formation interval seems very brief, it is consistent...productive epithermal deposit, the OH vein at Creede, Colorado. For more than half a century, D.E. White |  | | Journal (article/letter/editorial) | | com/locate/apgeochem Transient calcite fracture ®llings in a welded tu€, Snowshoe Mountain, Colorado A.R. Hoch a,*, M...Boulder, CO 80303, USA Precision Core Analysis, 1105 W. Custer Pl., Denver, CO 80223, USA b Received 8...tu€ near the summit of the Snowshoe Mountain, Colorado (47830'N, 106855 'W) had unique petrographic and...sampling the phreatic zone were mineralized with calcite and had porosity characteristics similar to unweathered...of the phreatic zone petrography indicates that calcite is dissolving, thereby changing the hydrogeochemical |  | | Report (volume) | | 1420 Mineral Resources of the La Garita Wilderness, San uan Mountains, Sout iwestern Colorado By THOMAS... SURVEY BULLETIN 1420 An evaluation of the mineral potential of the area UNITED STATES GOVERNMENT...Garita Wilderness, San Juan Mountains, southwestern Colorado. (Studies related to wilderness wilderness areas)...Supt.ofDocs.no.: 119.3:1420 1. Mines and mineral resources Colorado La Garita Wilderness. I. Bieniewski,...survey these wilderness areas to determine the mineral values, if any, that may be present. The act also |  | | Journal (article/letter/editorial) | | Copyright 0 1995 Elsevier Science Ltd Printed in the USA. All rights reserved 0016.7037/95 $9.50 + .OO Pergamon...Survey, Federal Center, MS 973, Denver, CO 80225, USA July 11, 1994; accepted in revised form January...EXAMPLES Creede The first ancient example is a suite of samples from sediments from the Miocene Creede (Colorado...(Colorado, USA) caldera moat that consist of altered volcanic materials including silica, clays, and carbonates... 1988; Campbell et al., 1993). The lake in the Creede caldera probably fluctuated from fresh to brackish |  | | Report (volume) | | GEOLOGY OF THE SAN JUAN REGION OF SOUTHWESTERN COLORADO BY WHITMAN CROSS AND ESPER S. LARSEN UNITED...sandstone________________________________________ Morrison formation.______________________________________ Cretaceous...________ Animas formation._________ ____________________________ Torrejon formation.___°____________...___°____________________________________ Wasatch formation._______ ______ _____________________.____ Ridgway till..-..._______ __ __ _-________-__-_'---__--__Blanco Basin formation._______-_ ____________-________---_-_ Volcanic |  | | Report (issue) | | GEOLOGICAL SURVEY PRELIMINARY SCIENTIFIC RESULTS OF THE CREEDE CALDERA CONTINENTAL SCIENTIFIC DRILLING PROGRAM...Canberra, Australia 1 Present address: Western Mining Co, P.O. Box 150 Roxby Downs, SA 5725, Australia...sequence of tuffaceous lacustrine sediments (Creede Formation) and an underlying 218 m thick sequence of...lacustrine sandstones and siltstones of the Creede Formation at depths of 1090-1426 feet (332-435 m). The...and polycrystalline pyrite occurring with bladed calcite in Snowshoe Mountain ignimbrite at depths of 670-707 |  | | Report (issue) | | Epithermal System: A Progress Report from Creede, Colorado by Geoffrey S. Plumlee 1 , Paul B. Barton2...Field symposium, Rocky Mountain GSA, in Boulder, Colorado, May, 1987 (Plumlee et al., 1987). Because the...mineralization at Creede, some references in this report to other talks in the series or to district geological...SLIDE LEFT 1 - Schematic representation of the Creede system hydrology, showing where different types...processes in the Creede mineralizing system. The epithermal mineralization at Creede was deposited by |  | | Journal (article/letter/editorial) | | 2014 Creede The last Wild West Silver Mining Camp in Colorado T he Creede mining district, located...and rugged San Juan Mountains of southwestern Colorado. Although silver was discovered in the area in...cause much excitement until 1889 when Nicholas C. Creede and his two partners found rich silver ore near...Amethyst, Last Chance, Commodore, and Bachelor. The mining encampment grew from a small settlement to a town...gravitated to mining boom towns. In 1890 the settlement was unofficially named Creede (Mumey 1949) in |  | | Report (issue) | | Bibliography and Index of Colorado Geology 1983 by Atnerican Geological Institute Colorado Geological Survey...Resources Denver, Colorado I 1987 Information Series 21 BIBLIOGRAPHY AND INDEX OF COLORADO GEOLOGY 1983...Geological Institute Colorado Geological Survey Department of Natural Resources Denver, Colorado 1987 The Colorado...opportunity employer. ii BIBLIOGRAPHY AND INDEX OF COLORADO GEOLOGY SERIALS LIST AAPG Bullett n. [Tulsa...the Mineral Industry. New York, NY: Society of Mining Engineers of American Institute of Mining, Metallurgical |  | | Report (chapter) | | volcanism: a review R. H. Sillitoe Department of Mining Geology, Royal School of Mines, Imperial College...pre-existing faults; in the San Juan Mountains, Colorado, in particular, earlier fractures related to caldera...regional phenomenon not directly related to vein formation. Alternatively, zones or vein haloes consist of... accompanied by varying quantities of pyrite, calcite, dolomite, barite, adularia, rhodochrosite, rhodonite...consisting of sedimentary and intru, sive rocks. Post-mineral volcanic units, particularly felsic tufts, are |  | | Report (issue) | | SURVEY Reconnaissance gas chemistry of the Creede, Colorado, hydrothermal system by Gary P. Landis1 and...nomenclature. 'U.S. Geological Survey Denver, Colorado This report is a reformatted and greatly amplified...Society of America Sectional Meeting, Boulder, Colorado, May, 1987 (Landis and Rye, 2987). Because the...mineralization at Creede, some references in this report to other talks in the series or to district geological...AT, N2, CH4, and various organic species) of the Creede hydrothermal fluids was determined from inclusion |  | | Report (issue) | | Petrology of the San Juan Region Southwestern Colorado By ESPER S. LARSEN, JR., and WHITMAN CROSS GEOLOGICAL...an area of I2fiOO square miles in southwestern Colorado UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON...GEOLOGY AND PETROLOGY OF THE SAN JUAN REGION, COLORADO vard University contributed liberally by financing...topographic maps covering much of the area. Many of the mining men and other residents of the San Juan region...classification_.____________----___--__.__-_ Quantitative mineral determinations._____________ Composition of the |  | | Report (issue) | | osphate nodules from the Wills Point Formation, Hopkins County, Tex., by Charles Milton and A. P. Bennison____..._________ The source of travertine in the Creede Formation, San Juan Mountains, Colo., by T. A. Steven...abdophane from a rare-earth occurrence, Valley County, Idaho, by J. W. Adams________________________________...disposal well at the Rocky Mountain Arsenal, Adams County, Colo., by C. T. Wrucke and D. M. Sheridan____...uranium deposits in the southern San Juan basin mineral belt, New Mexico-An hypothesis, by H. C. Grang |  | | Report (issue) | | imply endorsement by the U.S. Government. Denver, Colorado 1996 CONTENTS Page Abstract ............................................................... Colorado ................................................locality at the Durkee opal mine near Durkee, Baker County, Oregon. The name was derived from a Greek word...provide a basis for future studies by geological, mining, and medical investigators. PROPERTIES OF ERIONITE...smectite, opalCT, quartz, potassium feldspar, calcite, searlesite, and fluorite. Associated zeolites |  | | Report (issue) | | Lohman_ 125. ~iocene vertebrates of the Barstow Formation in southern California, by G. E. Lewis_________________________...~iguel County, Colo., by F. W. Cater_ 129. A Pleistocene section at Leonards Cut, Burke County, N.C.,...in a volcanic sequence related to the Creede caldera, Colorado, by J. C. Ratte and T. A. Steven ___ ...geochemical prospecting data from the Rocky Range, Beaver County, Utah, by J. J. Connor and A. T. ~iesch_______...part of the Smyrna ~ills quadrangle, Aroostook County, ~aine, by Louis Pavlides and F. C. CanneY---- |
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