 | | Report (issue) | | IN CHAFFEE, FREMONT, AND JEFFERSON COUNTIES, COIO. By WALDEMAR LINDGREN. INTRODUCTION. Colorado is not...contributed to this output, but only two Lake (Leadville district) and San Juan yielded notable amounts. The Leadville...Juan County slightly exceeded 1,500,000 pounds. The copper ores, properly so called, of Colorado comprised...from San Juan County. It may be said that Colorado does not contain a single copper mine of prominence...prominence. Of the counties mentioned in the title Chaffee produced 349,466 pounds of cop'per from 6,249 tons |  | | Report (volume) | | the Browns Canyon Wilderness Study Area, Chaffee County, Colorado U.S. GEOLOGICAL SURVEY BULLETIN 1716-C...the San Isabel National Forest, south-central Colorado: U.S. Geological Survey Bulletin 1638, p. 40-42...SOUTH-CENTRAL COLORADO Mineral Resources of the Browns Canyon Wilderness Study Area, Chaffee County, Colorado...Area, Chaffee County, Colorado. (Mineral resources of wilderness study areas South-Central Colorado; ch...Mines and mineral resources Colorado Browns Canyon Wilderness. 2. Geology Colorado Browns Canyon Wilderness |  | | Journal (article/letter/editorial) | | METAMORPHOSED PROTEROZOIC BASE-METAL SULFIDE OCCURRENCES, COLORADO: A RE-EVALUATION OF GAHNITE COMPOSITION AS A GUIDE...metamorphosed to the amphibolite and granulite facies in Colorado, many of which are spatially associated with Mg-rich...guide to sulfide ores. Zincian spinel from the Independence, Bon Ton, and Sedalia deposits and some cases...massive-sulfide deposits in Mg-rich alteration zones in Colorado, causes a marked enrichment in the spinel component...guide, massive sulfides, magnesium enrichment, Colorado. SOMMAIRE Le spinelle zincifère [(Zn,Fe,Mg)Al2O4] |  | | Journal (issue) | | Julius Weber Mamaroneck, New York COLORADO ISSUE #2 Articles Colorado locality index.............................. 323 by B. L. Muntyan What’s new in Colorado minerals? ...................................... Famous mineral localities: the Home Sweet Home mine ..................................................339 by M. I. Jacobson The San Juan Mountains of Colorado ..................................349 by J. A...10 cm tall, from the Yucca Hill claim, Park County, Colorado. Richard A. Kosnar specimen; photo by John |  | | Book (volume) | | ...........................................59 Colorado ...............................................................548 Table of Maps Page Alabama County Map ...................................................................................4 Alaska County and Stream Map ..................................Co. Mining Districts ............................................................22 Arizona County Map.........................23 Arizona – Cochise Co. Mining Districts .................................... |  | | 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 |  | | Book (edition) | | MILEAGE L OGS. REVISED EDITION Revised Edition, COLORADO GEM TRAILS AND MINERAL GUIDE HICllAHD :--1. PEARL...an extensive ¥em and mineral collecting tour 01 Colorado, revealing the interesting places where Nature...Swallow, Publisher) 2679 South York Street Denver, Colorado 80210 - , =· - ·, BOOKS BY RICHARD M. PEARL...PEARL Exploring Rocks, Minerals, Fossils in Colorado America's Mountain: Pikes Peak and the Pikes Peak...Atlas of Colorado American Gem Trails Nature As Sculptor: A Geologic Interpretation of Colorado . Scenery |  | | Report (volume) | | it helpful to refer to Survey Bulletin 507, "The mining districts of the western United States," and to...abundant, it may have been completely exhausted by mining or quarrying. Deposits of minerals of wide distribution...because they occur in sufficient quantity to warrant mining for their usual products but because they furnish...A. F. Rogers, Stanford University, Palo Alto. Colorado.........Prof. R. D. George, Boulder. Connecticut...See Bauxite and Hallpysite. Asbestos. Tallapoosa County, with corundum deposits near Dudleyville; not found |  | | Report (issue) | | Sedalia mine area and its Proterozoic deposits of base-metal sulfides and gahnite, Chaffee County, Colorado...standards and stratigraphic nomenclature. Denver, Colorado CONTENTS Page Abstract.................................................. Rocks of the Sedalia mine area.......................................... Proterozoic...1. Geologic map of the Sedalia mine area, Chaffee County, Colorado....................................the Sedalia mine and of other Proterozoic sulfide deposits in the Salida area, Colorado............. |  | | Book (volume) | | ...........................................47 Colorado ................................................rights, so remember you were told. If in doubt, a county map will tell you who the legal owner is. Good...gemmy qualities for cutting and polishing. AUTAUGA COUNTY PRATTVILLE, N. 6 mi., and just E of the Birmingham...were well known to prehistoric Indians.) BARBOUR COUNTY BAKER HILL, SE 1 mi. : 1 in a deep ravine, as a...deep red to variegated⎯ocher. BIBB COUNTY GENERAL AREA: c county gravel pits along the Cahaba R.⎯gemmy |  | | Book (volume) | | ...........................................47 Colorado ................................................rights, so remember you were told. If in doubt, a county map will tell you who the legal owner is. Good...gemmy qualities for cutting and polishing. AUTAUGA COUNTY PRATTVILLE, N. 6 mi., and just E of the Birmingham...were well known to prehistoric Indians.) BARBOUR COUNTY BAKER HILL, SE 1 mi. : 1 in a deep ravine, as a...deep red to variegated⎯ocher. BIBB COUNTY GENERAL AREA: c county gravel pits along the Cahaba R.⎯gemmy |  | | Report (volume) | | ............................................. Colorado........................................................................................ 102 District of Columbia ....................................to refer to Geological Survey Bulletin 507, "The mining districts of the western United States," and to...abundant it may have been completely exhausted by mining or quarrying. Deposits of minerals that are widely...because they occur in sufficient quantity to warrant mining for their usual products, but because they furnish |  | | Book (edition) | | YEAR 1687"—DAVID T. DAY, CHIEF OF THE DIVISION OF MINING STATISTICS AND TECHNOLOGY WASHINGTON GOVERNMENT...and consump tion, or better and cheaper means of mining, extraction, and convey ance to market, may in...correspondence has been carried on with geologists, mining engineers, and other local authorities, and various...mmed at Broken Arrow aud Trout creek, in Sc. Clair county. The strata in this field are more faulted und...prong of Canoe creek, in St. Clair county, to Ha\sop creek, in Bibb county, a distance of 60 miles. Down to |  | | Journal (issue) | | Colorado Springs Mineralogical Society Founded in 1936 Lazard Cahn Honorary President June 2019 PICK...Speaker: Amber Sanderson Topic: “Staking Unpatented Mining Claims on Fed- eral Land” Please note: Members...Dates Epidote: Green MonPebble Pups Corner ster Mine, Alaska. Over/Montgomery Brad’s Bench Tips Pebble...Pictured at left, Sanderson explains the importance of mining operations - from locating a deposit to reclamation...Chris Graham COLORADO SPRINGS MINERALOGICAL SOCIETY PO BOX 2 COLORADO SPRINGS, COLORADO 80901-0002 June |  | | Report (issue) | | 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...Counties, Colorado (Geological Survey Professional Paper 1073) Bibliography: p. 123 1. Geology Colorado Aspen...Aspen region. 2. Mines and mineral resources Colorado Aspen region. I. Title. II. Series: United States...Porphyritic quartz monzonite ......................... Muscovite-biotite granite............................. Quartz |  | | 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 |  | | Journal (article/letter/editorial) | | MS 973, Denver Federal Center, Denver, Colorado 80225, USA ABSTRACT ASTER (Advanced Spaceborne Thermal...The presence of montmorillonite, kaolinite, or muscovite, among other minerals, will result in a substantial... and between ASTER montmorillonite gypsum muscovite ASTER Band Centers: 10 11 8.5 12 9.0 14...spectra of montmorillonite, kaolinite, gypsum, and muscovite from Salisbury et al. (1991), converted to qualitative...and Bald Mountain gold districts in White Pine County (Nutt, 2000; Nutt and Hart, 2004). These districts |  | | Report (volume) | | Wilderness, Lake County, Colorado U.S. GEOLOGICAL SURVEY BULLETIN 1636. ~ COLORADO Mineral Resource...Potential of Mount Massive Wilderness, Lake County, Colorado By R.E. VAN LOENEN, G.K. LEE, and D.L. CAMPBELL...potential of Mount Massive Wilderness, Lake County, Colorado I by R.E. Van Loenen ... [et al.]. p. em....: I 19.3: 1636 1. Mines and mineral resources-Colorado-Mount Massive Wilderness. 2. Mount Massive Wilderness...Wilderness, San Isabel National Forest, Lake County, Colorado. The area was established as a wilderness |  | | Journal (issue) | | CHAPTER REPRESENTATIVES (ALSO BOARD MEMBERS) COLORADO CHAPTER: Bob Hembree; rhembree@comcast.net MIDWEST...Finger) and LKA Emeralds, Hiddenite, Alexander County, NC Go On Public Exhibit in New York City. Emeralds......................................... 2 Independence Mine, ........................................................................... 3 Little Three Mine,.................................................................................... 3 Cryo-Genie Mine ............................................... |  | | Report (issue) | | River Adjacent Wilderness Study Area, Jackson County, Colorado By Robert P. Dickerson 1 and John R. McDonnell...Geological Survey Denver, Colorado 2 U.S. Bureau of Mines Denver, Colorado CONTENTS Abstract...................................... 1 1 3 3 3 3 6 Mining activity.........................................(CO-010-104) Wilderness Study Area, Jackson County, Colorado. ABSTRACT The Platte River Adjacent Wilderness...(CO-010-104) consists of 30 acres in Jackson County, Colorado, No mineral occurences, energy resources, |  | | Book | | MINES AND MINERALS OF THE GREAT AMERICAN RIFT (COLORADO-NEW MEXICO) Sine —_—< ¢ te om At _SHT 40...MINES AND MINERALS OF THE GREAT AMERICAN RIFT (COLORADO-NEW MEXICO) Richard Walker Holmes and Marrianna...Mines and minerals of the Great American Rift (Colorado-New Mexico). Bibliography: p. Includes index...index. 1. Mines and mineral resources—Colorado. 2. Mines and mineral resources—New Mexico. I. Kennedy, Marrianna...enter must be obtained to prevent trespass. Old mine workings are dangerous and entering underground |  | | Journal (article/letter/editorial) | | view of the Tenderfoot mine (about 19131, Esterbrook copper district, Albany County. John Taylor collection...and Grace Dyck and wus titled “The Sunrise Iron Mine near Hartville, Wyoming”; it appeared in the MaylJune...titled “The Copper Mountain Pegmatite District, Freniont County, Wyoming” and was in the JulylAugust 2001...most notable ones. The localities are listed by county and then in alphabeticnl order. Where numerous...under the district name. District names are from Hausel (1986). Localities by County Albany County Allanite |  | Harlan, Stephen S., Vielreicher, Richard M., Mortensen, James M., Bradley, Dwight C., Goldfarb, Richard J., Snee, Lawrence W., Till, Allison B. (2017) Geology and Timing of Ore Formation in the Willow Creek Gold District, Talkeetna Mountains, Southern Alaska. Economic Geology, 112 (5) 1177-1204 doi:10.5382/econgeo.2017.4506 | Journal (article/letter/editorial) | | Timing of Ore Formation in the Willow Creek Gold District, Talkeetna Mountains, Southern Alaska* Stephen...and Geology, Golden, Colorado 80401 Abstract The Willow Creek mining district was the third-largest...third-largest lode gold district in Alaska in the 20th century, having produced 19 metric tons (t) of gold from vein...t of gold from associated placer deposits. The district is located in the southern Talkeetna Mountains...evolution, and age of gold mineralization in the district. New U-Pb zircon dates from the Talkeetna batholith |  | | Journal (article/letter/editorial) | | 1965 MINERALOGY AND PARAGENESIS OF THE COTOPAXI, COLORADO, Ct-Zn SKARN DEPOSIT Cuenr.BsA. Sar-orrr,Departmentof...base-metal deposits crops out in south-central Colorado. At Cotopaxi mineralization is confined to a small...INrnonucrroN Nearly all metallic mineralization in Colorado is associatedwith igneous rocks and structures...but little-studied ore deposits in south-central Colorado is Precambrian in age. These deposits (Fig. 1)...among thesedepositsare the following: Chaffee County Cleora district prospects (Fig. 1, No. 2) Sedaliamine |  | | Journal (issue) | | March 2019 Fluorescent Opal From the Velvet District, Pershing Co., Nevada Bob Werner werner@lcturbonet...werner@lcturbonet.com The diatomite mines of the Velvet District haven't received much attention over the years... Diatomite (fig. I) was first reported in the District in 1923 (Vanderburg, 1936) on the west side ofTrinity...NV, about 30 km northwest of Lovelock. Initial mining was done by the Southern Pacific Co. (SP) and in...(EPM) who developed four open-pit mines in the District (Johnson, 1977). The diatomite consists of the |
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