 | | Report (issue) | | Quadrangle, Colorado GEOLOGICAL SURVEY PROFESSIONAL Prepared in cooperation with the Colorado State Geological...Geological Survey Board and the Colorado Metal Mining Fund PAPER 289 Geology and Ore Deposits of...of the Garfield Quadrangle, Colorado By McCLELLAND G. DINGS and CHARLES S. ROBINSON GEOLOGICAL SURVEY...in cooperation with the Colorado State Geological Survey Board and the Colorado Metal Mitting Fund. A..._ Fremont dolomite _________________________ _ Chaffee formation __________________________ _ Leadville |  | | Journal (article/letter/editorial) | | Technology , Mail Code 170–25, Pasadena, CA, 91125, USA c Department of Geology and Geophysics , University...Wisconsin‐Madison , 1215 W. Dayton St, Madison, WI, 53706, USA d Key Centre for Strategic Mineral Deposits, Department...Wisconsin-Madison, 1215 W. Dayton St, Madison, WI 53706 USA and Key Centre for Strategic Mineral Deposits, Department...sample from the Matilda M1 deposit, hosted in the greenschist-amphibolite 40 39 facies Matilda domain, has...deposit: (i) mineralisation in the Wiluna and Matilda domains occurred during a craton-wide gold-mineralisation |  | | Report (issue) | | .......................... . Situation of the district ...................................................................... General geology of the district ................................................40 41 41 4 CONTENTS. General goology of the district-Continued. Structure ........ ~ . . . . . . .... ........................... . 104 Muscovite (sericite) ...............................................112 Quantity of porphyry ore developed in the district ..................................... . 114 Relations |  | | Report (issue) | | GEORGETOWN QlJADRANGLE (TOGETHER 'VITH THE EMPIRE DISTRICT) COLORADo· BY JOSIAH E. SPURR AND GEORGE H. GARREY..................._.......... . Distribution in Colorado ................................................Boulder County.............. . . . . . . . . . . . ......... . ....... . 103 Ores in Gilpin County .............................. . 103 Orcs in Clear Creek County ............................ . 103 Ores from...Argentine to the Tenmile district .. : ............... . 104 Ores of the Tenmile 'district ................. |  | | Book | | 193-256 137-208 129-192 209-264 193-256 [ [ COLORADO-Ill] 177-256 121-184 89-168 1-120 1-88 [ ...177-256 185-280 169-248 [ 425-528 337--400 COLORADO-II] 321--400 337--400 ARIZONA-Ill] 337--400...69-132 65-128 1-64 11 / 1980 20 I 1989 [ COLORADO-I] [ 289-352 385-448 [ AUSTRALlA] 353-504...Iaria from the Howard-Montgomery quarry, Howard County, Maryland (by J. S. White) 25:53-54 AFGHANISTAN...Iron-manganese phosphates of the Williams pegmatites, Coosa County, Alabama (by P. B. Leavens & T. A. Simpson) 6:66-73 |  | | Journal (issue) | | Cooper Nottingham, England Anthony R. Kampf L.A. County Mus. of Nat. Hist. Los Angeles, CA Joseph A. Mandarino...Famous mineral localities: The Cripple Creek Mining District, Colorado . . . . . . . . . . . . . . . . . ...collection to the Natural History Museum of Los Angeles County. Julius Weber was well known in the mineral community...Department of the Natural History Museum of Los Angeles County has placed a high priority on building its micromount...March–April, 2005 Miners from throughout the Tri-State District brought him specimens which he bought for the |  | | Report (issue) | | nomenclature. ABSTRACT The Castrovirroyna mining district lies in the Andean Cordillera of South Central...Supervene silver ores vere first mined. Currently the district produces about 20,000 tons of laad*sinc ore and...and 50OO tons of silver ore annually* The district: Is underlain by Tertiary andesitlc rocks interbedded...vestermaost veins at la Virreyna* In tha center of the district, around Caudalosa, lead sulfantiiaonldas are the...pattern of vallrock alteration throughout the district grades from silicification and scricitization |  | | Journal (article/letter/editorial) | | v v v A \-_--_--_--_A .... A • ..... ..... MATILDA' A v v v v v v v v,P.EposITS Strike-slipfault...structural and textural evidence for a bonate,sericite,and locally fuchsite.However, the high-levelor...Deposits The majorityof rock typesin the Wiluna district Wiluna domain are mafic and ultramaficlava flows...into an into the two distinct domains,Wiluna and Matilda older greenstone series,comprisingflow I, flow...o lessbrecciated quartz-(dolomite)_+fuchsite_+sericite _+chlorite _+epidoteto strain-freechlorite-(calcite)rocks |  | | Report (volume) | | BULLETIN 539 SOME ORE DEPOSITS IN NORTHWESTERN OUSTER COUNTY, IDAHO BY JOSEPH B. UMPLEBY WASHINGTON GOVERNMENT......... Future of mining in northwestern Custer County......................... Mining districts........................................... Bay Horse district.................................................CONTENTS. Mining districts Continued. Bay Horse district Continued. Mines and principal prospects Continued.................................... Yankee Fork district.............................................. |  | Ford, A., Hagemann, S.G., Fogliata, A.S., Miller, J.M., Mol, A., Doyle, P.J. (2015) Porphyry, epithermal, and orogenic gold prospectivity of Argentina. Ore Geology Reviews, 71. 655-672 doi:10.1016/j.oregeorev.2015.05.013 | Journal (article/letter/editorial) | | deposits such as those in the El Indio–Pascua gold district which hosts the Veladero and Pascua-Lama high...side of the border), and the Deseado Massif gold district which hosts, amongst others, the Cerro Vanguardia...Massif. Below a brief description of the regional district geology and deposit setting is provided. For a...Hagemann (2011a). 2.1. North-western Argentina gold district in Juyuy, Salta and Catamarca provinces (Orogenic)...Hydrothermal alteration is predominantly characterized by sericite and minor Fe-carbonate in the core of the shear |  | | Book | | Complex Kookabookra • Bear Hill district Rockvale· Fishington district Deposits in and adjacent to the...Epigenetic deposits ,.. Marengo - Dundurrabin - Dorrigo district Deposits in and adjacent to the Dundurrabin Granodiorite...Taylors Ann district ,... Munga Creek district Granitoid-Related Deposits Guyra . Vralla district Llangolhlin...Adamellite Vralla Granodioirite ,..... Oban - Backwater district ;...............................................Valla - Nambucca district Yarrabapinni district Discussion ,.............. Kellys Creek Leucoadamellite |  | | Book | | San Bernardino County, Cal. Fie. . Turquois matrix; Royal Blue Turquois mine, m Nye County, near Millers...Fia. Turquois matrix; Weber mine, Belmont, Nye County, Nev. Fia. . Dark-blue turquois; Azure mine, Burro...mine, 13 miles north of west of Millers, Esmeralda County, Nev. -7. Split veinlet of turquois showing a ‘““Y”...transparency taken by John F. Bennett, an attorney in Colorado Springs who apparently can make a camera sit up...the Broadmoor Drug Store, the Broadmoor Hotel, Colorado Springs, Colo. Mrs. Edna Mae Bennett is the author |  | | Report (issue) | | DIREcToR PRELIMINARY REPORT ON THE KETCHIKAN MINING DISTRICT, ALASKA WITH AN INTRODUCTORY SKETCH OF THE GEOLOGY...DIRECTOR PRELIMINARY REPORT ON THE KETCHIKAN MINING DISTRICT, ALASKA WITH AN INTRODUCTORY SKETCH OF THE GEOLOGY...glaciers Former glaciation The Ketchikan mining district General description History Geology Introduction...Amphibolite 3 44 CONTENTS. 'The Ketchikan mining district—Continued.4 Geology—Continued. Page. Bed-rock...68 4 68 4 5 CONTENTS.4 The Ketchikan mining district—Continued.4 Economic geology—Continued. Descriptions |  | | Report (volume) | | General features____________________________ Coosa County _________ ____________________ Randolph County...General features_____________________________ Chaffee County__i___________________________ Fremont C...Royal Gorge region_________________________ Texas Creek region _________________ _ _ Jefferson County__...Cherokee County_____________________________ 72 Elbert County _____________________________ 75 Hall County__...County_______________________________ 76 Hart County. ___ __ __________________ 77, Lumpkin and Union counti |  | | Journal (issue) | | Cooper Nottingham, England Anthony R. Kampf L.A. County Mus. of Nat. Hist. Los Angeles, CA Joseph A. Mandarino...Bastnas Mines, Riddarhyttan Ore Field, Bergslagen District, Vastmanland, Sweden ........... 187 by L. Ohman...BASTDAS ffiIDES RIDDARHYTTAD ORE FIELD, BERGSLAGED DISTRICT, VASTffiADLADD, SillEDED Lennart Ohman Hi:igviltsvagen...INTRODUCTION The Riddarhyttan ore field is situated in the county of Vastmanland, south-central Sweden, about 70...rich zone 187 Figure 1. Location map showing the county of Vastmanland and the Riddarhyttan ore field. |  | | Report (volume) | | Director Published in the Central Region, Denver, Colorado Manuscript approved for publication December 27.............................. Area 42-Twelvemile Creek...................................................Silver, gold, copper, and zinc Kasaan Peninsula district Paleozoic copper-iron (molybdenum) skarn Produced...gAg from 111,503 metric tons ore. DESCRIPTION: District includes major deposit at Jumbo, moderate deposits...Herreid and others (1978). 8 55°15' 132°37' Jumbo district Iron, silver, gold, and copper GEOCHEMICAL METHODS |  | | Journal (article/letter/editorial) | | between c. 2.65 Ma in the east (including Laverton District, Kurnalpi Terrane) to c. 2.63 Ma in the west (including...younger gold lodes at deposits in the Laverton District. For example, at Granny Smith, early gold-poor...the Great Eastern gold deposit in the Lawlers District (Mikucki 1997; Fletcher et al. 1998). Metamorphism...after c. 2655 Ma and was diachronous across the district over about 10 m.y. Available age constraints from...et al. 2004; Robert et al. 2005). The Leonora District is another example where multiple gold events |  | Brown, S. M., Fletcher, I. R., Stein, H. J., Snee, L. W., Groves, D. I. (2002) Geochronological Constraints on Pre-, Syn-, and Postmineralization Events at the World-Class Cleo Gold Deposit, Eastern Goldfields Province, Western Australia. Economic Geology, 97 (3) 541-559 doi:10.2113/gsecongeo.97.3.541 | Journal (article/letter/editorial) | | Department of Earth Resources, Colorado State University, Fort Collins, Colorado 80523 L. W. SNEE, U.S. Geological...Mail Stop 974, Denver Federal Center, Denver, Colorado 80225 AND D. I. GROVES Centre for Global Metallogeny...Mile9 ♦ 10 Mt Gibson ❂ 11 Victory, Kambalda ● 12 Matilda, Wiluna ♦ 5 ⊕ Big Bell (minor) 9 Mt Charlotte ♦...most intense deformation. In the proximal zone, sericite and ankerite and/or 0361-0128/98/000/000-00 $6...than 2 percent pyrite. In the intermediate zone, sericite, chlorite, and ankerite and/or dolomite are pervasive |  | | Report (issue) | | OF THS FUJKTKSS SPRUCE PIHB DISTRICT, ISOlCffl CABOLIHA by Donald A* Brobst This report la praliminary...Geologic map of the Plumtree area, Spruce Pine district, Forth Carolina.................................route 192 and tho Pluwtree Creek road, Avery Co. and 0 ~B gneiss from Cane Creek Mountain, Mitchell Co. ...Charlies Bidge and Or-Q-B-0 gneiss fron Little Henson Creek, Arery Co. .......................................gneiss from Cane Creek Mountain, Mitcholl Co. and 0 -M-Q-B-G schist from Cano Creek Mountain, Mitchell |  | | Report (issue) | | observed in the gold gravels at Cherokee, Butte County, and this locality, became the most noted one in...short articles on California diamonds. A Amador County: few small stones have been picked up near the...towns of Volcano, Oleta and Fiddleto^vn. Butte County: In 1853 it was observed that diamonds occurred...diamonds have been obtained from the placers in this district and it leads all other districts in the State...Thompson Flat, two miles north of Oroville. El Dorado County: A diamond weighing 1| carats was found at Forest |  | | Book | | fossil-hunting localities, organized by state, county, township, section, or other landmark, together...although in the dinosaur country where Utah and Colorado corner along the Wyoming line, the fossil hunter...and found in limestone deposits south of Fruita, Colorado. Molds or Casts: Not infrequently an organism...sandstone, clay, shale, or limestones (including chalk, dolomite, and marl). Fresh excavations of any type... where workmen have found fossils within their county of jurisdiction. FLOAT AS AN INDICATOR The experienced | | | Book | | San Bernardino County, Cal. Turquois matrix; Royal Blue Turquoie mine, in Nye County, near Millers, Nev...Nev. Turquois matrix; Weber mine, Belmont, Nye County, Nev. Dark-blue turquoisj AzUJ'8 mine, Burm Mountains... 13 miles north of we!Jt of Yillen,, EsmentJda County, Nev. • Flo. 7. Split veinlet of turquois showing...transparency taken by John F. Bennett, an attorney in Colorado Springs who apparently can make a camera sit up...the Broadmoor Drug Store, the Broadmoor Hotel, Colorado Springs, Colo. Mrs. Edna Mae Bennett is the author |  | | Book | | states of Guanajuato and Chihuahua, Mexico. In the USA silver occurs at Keweenaw, Michigan, in association...copper ores, and at Butte, Montana, as well as Colorado, Arizona and Idaho. In Canada it occurs at Cobalt...Corocoro, Bolivia, and at Cananea, Mexico. In the USA copper is found in abundance in the Keweenaw area...and from Kalgoorlie in Western Australia. In the USA gold is often obtained by individual prospectors...ranges of the western states, including California, Colorado, Nevada and Alaska. In Canada deposits occur at |  | | Report (chapter) | | Bernardino County, Cal. Fig. 1. Fig. Turquois matrix; Royal Blue Turquois mine, in Nye County, near Millers...Nev. Turquois matrix; Weber mine, Belmont, Nye County, Nev. 4. Dark-blue turquois; Azure mine, Burro...mine, 13 miles north of west of Millers, Esmeralda County, Nev. 7. Split veinlet of turquois showing a "...Page. 178 Crystal of tiu-quois from Campbell County, Va. 180 182 Turquois cameo, probably of European...in New Mexico, Arizona, California, Nevada, and Colorado are now producing stones of good quahty, rivals |  | | Report (issue) | | ..............103 viii Greenmount – Mahogany Creek – Mundaring ........................................................................105 Mahogany Creek quarry .........................................................................105 The Mahogany Creek monzogranite quarry.................................................................106 Mahogany Creek monzogranite blocks used in the ground floor construction...K-feldspar kg Ma Mm3 μm MPa Mt Mtpa P2O5 ppm t t/m3 tpa USA US$ On-site assistance given by management and staff |
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