 | | Journal (article/letter/editorial) | | Geology Vol. 99, pp. 3–37 Henderson Porphyry Molybdenum System, Colorado: I. Sequence and Abundance...Stanford, California 94305-2115 Abstract At Henderson, Colorado, 12 rhyolitic stocks of Oligocene age crystallized...tops are 1 km below the surface of Red Mountain: Henderson (oldest), Seriate, and Vasquez (deepest and youngest)...low-temperature assemblages, which extended higher above Henderson than Seriate. Prior to that time, the region where...terminated in the vicinity of stocks in both the Henderson and Seriate centers; proximal to stocks, the multiplicity |  | | Report (issue) | | Ore, Henderson Mine, Colorado By George A. Desborough U. S. Geological Survey Denver, Colorado, 80225...Extractive Research and Development, Inc. Golden, Colorado, 80401 Open~File Report 80-661 1980 This report...Concentration of tin, tantalum, and niobium in ilmenorutile from a mill circuit concentrate, determined...electron microprobe analysis———— Composition of ilmenorutile and adjacent 3. aeschynite for four mineral...occur at the Henderson molybdenum mine, Colorado. The major minerals in fresh Henderson host rocks (dominantly |  | | Book | | hobbyists. Many would be surprised to learn that the mining of titanium oxide, primarily for pigments, is a...localities include: the McGuire pegmatite, Park County, Colorado; the Etta and Peerless mines, near Keystone...with lesser amounts of anatase and U l s t e r County, New York. Minute tabular brookite crystals rutile)...occurs with quartz crystals at the Ellenville Lead mine, granite at Topsham, Maine. Figure 20. A thumbnail-sized...Titania in Metamorphic Rocks The Onganja mining district, Namibia, perhaps more noteworthy to collectors |  | | Journal (article/letter/editorial) | | Geology Vol. 99, pp. 39–72 Henderson Porphyry Molybdenum System, Colorado: II. Decoupling of Introduction...hydrothermal mineral assemblages developed at Henderson, Colorado, as 12 rhyolitic stocks of Oligocene age...associated with sericite-pyrite alteration at Henderson were unusually saline (mostly 29–36 wt % NaCl...assemblages that formed above intrusive centers at Henderson resemble assemblages in other Climax-type porphyry...in common with either suite of assemblages at Henderson. Introduction GEOCHEMICAL investigations provide |  | | Journal (article/letter/editorial) | | Hydrothermal Features in the Henderson Porphyry MolybdenumDeposit, Colorado RICHARDB. CARTEN,*ENNISP. GERAGHTY...mineralizedintrusions,e.g., nine principal levels in the mine. Level plans and major and trace element chemistryof...al., 1976). Urad porphyryhosts the much larger Henderson deposit that is estimatedgeologicallyto contain800...include Depth ofemplacement Intrusions in the Urad-Henderson systemhave been rotated southeast,15ø to 25 ø...may have occurred along the Tertiary-age Woods Creek fault or a reactivatedportion of the Precambrian-age |  | | Report (volume) | | Bulletin, vol. 44. New York. American Institute of Mining Engineers: Bulletin, nos. 61-72; Transactions,... 147-264. San Francisco, Cal. California State Mining Bureau: Bulletin, no. 64. San Francisco, Cal. California...Transactions, vol. 9, pts. 2, 3. Toronto, Ont. Canadian Mining Institute: Quarterly Bulletin, nos. 18-20; Journal... BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, 1912. 7 Canadian Mining Journal, vol. 33. Toronto and Montreal, Canada... New York. Colorado College Publications: Science series, vol. 12, nos. 10, 11. Colorado Springs, Colo |  | | Journal (article/letter/editorial) | | of the Rare Earth Element Litter A. E. Williams-Jones† and O. V. Vasyukova Department of Earth and Planetary...Corresponding author: e-mail, anthony.williams-jones@mcgill.ca ISSN 0361-0128; doi: 10.5382/econgeo...8, 2017 Accepted: April 4, 2018 974 WILLIAMS-JONES AND VASYUKOVA ionic radius 75 pm. This is also...referred to as Landsverk 3, in the Iveland-Evje district north of Kristiansand in Norway. The mineral was...scandium include ilmenite and ilmenorutile. For example, in the Iveland-Evje district (Norway), the scandium |  | Pearson, R.C., Braddock, W.A., Flanigan, V.J., Patten, L.L. (1981) Mineral resources of the Comanche-Big South, Neota-Flat Top, and Never Summer Wilderness Study Area, north-central Colorado. Open-File Report Vol. 1981 (81-578) US Geological Survey doi:10.3133/ofr81578 | Report (issue) | | Never Summer Wilderness Study Areas, North-Central Colorado By Robert C. Pearson, William A. Braddock, and...study area........................................ Mining claims and mineral prospects.....................area.............................................. Mining claims, mineral prospects, and recent exploration...Never Summer wilderness study areas, north-central Colorado.................................................Top, and Never Summer wilderness study areas, Colorado.............................................. |  | | Journal (issue) | | RECENT INVESTIGATION AT THE IMPERIAL INSTITUTE Ilmenorutile from Sierra Leone . • • • 45 • • ABSTRACTS...Completely soluble. No change. soluble. Solu- . Almost clear tion less turbid solution. than ben.zene solution...part of naphtha). On cooling the varnish remained clear and was then applied to sized wood. The film rapidly...the crystals melted and a clear glossy film was obtained which remained clear on cooling and after standing...examined. Whilst the benzene solution remained clear, a • Io BULLETIN OF THE IMPERIAL INSTITUTE |  | | Journal (issue) | | Cooper Nottingham, England Anthony R. Kampf L.A. County Mus. of Nat. Hist. Los Angeles, CA Joseph A. Mandarino...Michigan Correspondents Dudley Blauwet Louisville, Colorado Miguel Calvo Zaragoza, Spain Joe Polityka Staten...purchase the collection were forthcoming from the mining company CRA Ltd., as its contribution to Victoria’s...very difficult to separate fact from fiction. It’s clear there were legal disputes over his gold collection...what was previously known as the Saint-Michel district, and is now part of the Arrondissement de Vil |  | | 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 |  | | Journal (article/letter/editorial) | | with depth. This was first recognized at Climax, Colorado (Fig. 2), where dikes emanating from the top of...volcanic tuffs (e.g., Pine Grove, Utah; Henderson, Colorado), breccia pipes (e.g., Cave Peak, Texas;...Mt. Emmons, Colorado – Fig. 3), or breccia dikes and pebble dikes (e.g., Climax, Henderson, Pine Grove...Climax (Colorado), Henderson (Colorado), Pine Grove (Utah), Questa (New Mexico), Silver Creek (Colorado;...(Colorado; also called Rico), Chicago Basin (Colorado), Cave Peak (Texas) and Big Ben (Montana) (see Bookstrom |  | | Journal (issue) | | Cooper Nottingham, England Anthony R. Kampf L.A. County Mus. of Nat. Hist. Los Angeles, CA Joseph A. Mandarino...141 by W. A. Henderson , Jr., R. Peter Richards & D. G. Howard The Pezinok antimony mine, Male Karpaty...so that a seasoned curator has the opportunity to pass along to a new curator the skills and the lore that...to Gems & Minerals Bad B oys o f Cripple Creek Blue Sky Mining Boulder Beads Bright Art & Gems Carl & Naom...Collector's Stope Colorado Academ y o f Silversmithing Colorado Gem stone Colorado N uggets Comstock |  | | 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 (issue) | | Tucson, AZ 85715 602-299-5274 Promotions Manager Sue Jones 1601 Fairview Dr., Suite C Carson City, NV 89701...paragenesis of the Little Three mine pegmatites, Ramona district, San Diego County, California .............................................. 152 by W. A. Henderson ...............................................25046, M .S. 905 Denver Federal Center Denver, Colorado 80225 In recent decades the science of mineralogy... 905 Box 25046 Denver Federal Center, Denver, Colorado 80225 Louis B. Spaulding, Jr. P. O. Box 807, Ramona |  | | Journal (article/letter/editorial) | | Granite- a rare-metal-rich Precambrian pluton, Colorado, USA G. A. DESBOROUGH, S. D. LUDINGTON, AND W. N...N. SHARP US Geological Survey, Denver, Colorado, USA SUMMARY. The Precambrian Redskin stock is a highsilica...Peak batholith. Zircon, fluorite, fluocerite, ilmenorutile, columbite, biotite, magnetite, and hematite...The principal residences of Sn, Nb, and Ta are ilmenorutile and columbite. The occurrence of cassiterite...igneous rocks which are hosts for molybdenite ore in Colorado (Desborough and Sharp, I978; Desborough et al |  | | Other Paper | | MAGNET COVE, HOT SPRING COUNTY, ARKANSAS: COLLECTOR AND PROFESSIONAL OBSERVATIONS, STORIES AND PHOTOGRAPHS...and J. Michael Howard MAGNET COVE, HOT SPRING COUNTY, ARKANSAS: COLLECTOR AND PROFESSIONAL OBSERVATIONS...……………….…. 5 History: Minerals, Collecting and Mining…………………………………….……… The Carbonatites: Localities...Minerals……………………………………………………………….. 24 Martin Marietta Jones Mill Quarry………………………………………….. 27 Pseudoleucite...……………... 38 Christy Brookite Deposit (Vanadium Mine)………………………… 38 Old Highway Outcrops……………………………………………… |  | | Book | | nearly all metals and the inevitable closing of many mining operations, it is a matter of the industry's survival...decision, not only is a handy volume affered to the mining and processing community but also duplication of...(such as "Rare earth elements geochemistry"; Henderson, P., editor) is avoided. The series "Special Publications...Bastnaesite-Fluorite-Barite Deposit of the Kizilcaören District, Eskisehir, Turkey. G. Morteani and M. Satir (with...Granite-Hosted Tantalum Deposits: An Approach via District Analysis. P. 1. Pollard (with 1 Figure) . . . |  | | Report (issue) | | ________ _ Beach deposits ___ -----------------Colorado _____________________________ _ Crystalline rocks...Perce Counties __________ _ Idaho CountY-----------------Valley CountY-----------------Adams, Payette,...and Gem Counties ________________________ _ Boise County ___ --------------Ada, Owyhee, Elmore, and Custer..._____________ _ Spruce Pine district ____________ Madison County and Haywood County _____________________ _..._ Zirconia district ___________ ----Macon, Jackson, and Clay Counties __ ---- _______________ -- __ Crystalline |  | | Journal (article/letter/editorial) | | Jeffrey Scovil photo. July/August: Calcite, Gallatin County, Mon tana. American Museum of Natural Histo ry...September/October: Chalcocite, Flambeau mine, Ladysmith, Rusk County, Wiscon sin. F. John Barlow specimen...November/December: Chalcocite, Bristol, Hartford County, Connecticut. Jim Minette specimen, Jeffrey Scovil...Alabandite, Mont Saint-Hilaire, Quebec, 101 Albite, Colorado, 49 Allanite, California, 36 Altamura, R. J ....of Connecticut, 358-69 Anatase, Arkansas, 159; Colorado, 128, 183; Connecticut, 421; Urals, 271 Andesine |  | | Book (edition) | | ulfenite, Rowley Mine, Maricopa County, 4 cm high specimen, Evan and Melissa Jones Collection, photo...Ebner Flagg Mineral Foundation Mark Hay Robert W. Jones Mineralogical Society of Arizona Tony Potucek Prescott...used mining districts as part of the locality description. These political and geographic district names...with a more descriptive term, metallic mineral district. This term shows the geochemical and mineralogical...reader to learn more about the geology of the district and to possibly predict the minerals that could |  | | Report (issue) | | endorsement by the U.S. Government. 'Denver, Colorado 1995 CONTENTS Geoenvironmental models of mineral...mineralized areas prior to mining, and conditions that result from mining and mineral processing. Other...as climate, and anthropogenic factors (including mining and mineral processing methods) mostly modify the...exploration, and assessment of abandoned mine lands and mine-site remediation. This compilation presents...from mining, mineral processing, and smelting. For example, the environmental signature of a mine site |  | | Book (edition) | | — _ ; COLORADO GEM TRAILS AND MINERAL GUIDE ! ■ : ' BOOKS BY RICHARD M. PEARL Colorado Gem Trails...Trails and Mineral Guide Colorado Rocks, Minerals, Fossils America’s Mountain: Pikes Peak and the Pikes...Nature As Sculptor: A Geologic Interpretation of Colorado Scenery Guide to Geologic Literature Popular Gemology...Gemology Mineral Collectors Handbook Colorado Gem Trails The Art of Gem Cutting (With Dr. H. C. Dake)...Dake) * RICHARD M. PEARL ★ COLORADO GEM TRAILS AND MINERAL GUIDE ★ SKETCH MAPS BY MIGNON WARDELL PEARL |  | | Journal (issue) | | R. Kampf Natural History Museum of Los Angeles County George Robinson National Museums of Canada Arthur...localities: the mineralogy of Graves Mountain, Lincoln County, G eorgia....................................................................... 477 by W. A. Henderson, Jr. & V. Peisley Fibrous rutile from Franklin...chalcopyrite, from the Sweetwater mine, Ellington, Reynolds County, Missouri. Collection of Maudine and...subscrip tion. A mint copy of volume 7, number 6 (Colorado-I) will buy you a three-year subscription. How |  | | Book | | long (Marty, 2004 ). AFRICA widely in Litchfield County, where good crystals were taken from quartz veins...region (Brunet, I 977b ). NEW YORK Amity, Orange County. At many isolated collected sites between the towns...Mount Malosa, Chilwa alkaline province, Zomba district. "Illite" is the name of a series of incompletely...Litchfield County. Ilmenite masses and crystals from somewhere near Washington, Litchfield County, were described...Lake Road occurrence, Faraday Township, Hastings County. In fall 1994, Dan and Shelley Lambert extracted |
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