 | | Report (issue) | | 1947 For sale by the Superintendent of Documents, U. S. Government Printing Office, Washington 25, D....Monzonite porphyry dikes of the Eureka area The Sylvanite composite stock.................................dikes and sills of the Sylvanite area . Petrographic relations between the Sylvanite and Old Hachita stocks............. Bedding-plane faults of the Eureka district Interpretation of original conditions along the.................................................. Gold ............................................... |  | | Report (issue) | | "\VALCOTT, DIRECTOR GEO LOGY AND GOLD DEPOSITS OF THE CRIPPLE CREEK DISTRICT, COLORADO BY \V ALDEl\;IAR... . . . . . . . First geological survey of the district .............................. _• . . . . . ..................... Geological structure of the district ............... _................... __ .. _...._____________ ........ . 100 Petrology of the district ______________ . _______________________________________________...___ _ 113 Chapter IV. -General mineralogy of the district . _______________ .... ____ .. ______________ |  | | Report (volume) | | Economic Geology of the Idaho Springs District Clear Creek and Gilpin Counties, Colorado GEOLOGICAL (=)...1208 * Economic Geology of the Idaho Springs District Clear Creek and -i ;i ?i Gilpin Counties, Colorado...____ Mines and prospects in the Idaho Springs district ________________ Previous studies.___________...___________---______^_______________________ Relation of silver-gold ratios to zonal pattern _________________ Ore b...in pocket] PLATE 1. Map of the Idaho Springs district, Colorado, showing location of mines and distribution |  | | Report (issue) | | Wyoming 82071 (307) 766·2286 Front Cover - Wyoming gold. Gold buttons in the prospector's pan were recovered...by Dean Farris from mine dump waste in the Gold Hill district. The actual diameter of the button in the...the lower left is approximately ',4 inch. (Gold photographed by Alan J. VerPloeg; drawing by Phyllis A... . . . . . . . . . . . . . . . . . . . Kirwin district . . . . . . , . . . . . . . . . . . . . . . ....City) district .. . . . . . . . . . . . . . . . . . . . . . . . . 13 16 Stinkingwater district . . |  | | Report (issue) | | Economic Geology of the ·central City District .Gilpin County, Colorado By PAUL K. SIMS, A. A. DRAKE...Kibler, 1918. Economic geology of the Central City district, Gilpin County, Colorado, by Paul K. Sims, A.A...Kibler, 1918Economic geology of the Central City district, Gilpin County, Colorado. 1963. (Card 2) 1. Geology...Economic-Colorado-Central City district. 2. Ore-deposits-Colorado-Central City district. 3. Mines and mineral...mineral re. sources-Colorado-Central City district. I. Drake, Avery Ala, 1927joint author. II. Tooker, Edwin |  | | Report (issue) | | REPORT 19i6 Nines and Prospects, Idaho Springs District Clear Creek and Gilpin Counties, Colorado Descriptions...Commission Introduction The Idoiho Springs mining district forms an important segment of tae Front Range...the region iu~ west ct iioulder southwestward across the Front Range. From 1859, when placer gold was...was discovered in Idaho Springs and lode gold in Central City, through 1959, ores valued at about $200 million...west, and southwest. The adjacent Central City district, which produced ores valued at more than $100 |  | | Report (volume) | | ·········································-····· Gold and silver ····································...deposit in a breccia pipe, possibly with additional gold and silver, or a disseminated molybdenum deposit...with the veins are copper, lead, zinc, silver, and gold. The veins have been intensively prospected in the... bring additional thousands of people into the region. Burgeoning land development on INTRODUCTION'...troughline and direction of plunge - - - - FAULT-U, upthrown block; D. downthrown block FIGURE 1.-Part |  | | Journal (volume) | | zcv >- IIMDEX: Page. of Costa Rica Abanearez Gold Fields 206, 358, 511, 666, 1032 833 **2, 34, ...prevention . . . Queen Co.'s mine, Arizona Accident Gold Mining Co., Subil mine, French Gulch, Rules, Copper...906 Fairbanks district output 1913 945 Fairbanks distrtot sts^mp-raiUs 341 Fineness of gold ati Lift, ... . j Glaciers Gold dredges Gold placer district, new Gold placer production Gold placers Coldstream...Coldstream, No. 17 u: •,• • ••••••• Editorial rule In Nelchina placer district Nome storm Ditto Editorial |  | | Journal (volume) | | visitors, interested to see how rock have the yellow gold extracted therefrom, and how cleverly the little...val- Through this trough-like depression extends a gold belt reaching a distance of fifteen miles from the...and of greatly varying size. The gold-bearing quartz of the district is associated with these dykes, usually...Street, San Francisco, J. F. S. F. Some Coast Gold $3 00 4 00 Postoffiee as second-class mall matter...Mine of Salt Spring Spring Valley, Cal., 1. Coast Gold Yield in '99; What is Alluvial? Decision of the |  | | Report (volume) | | metallic values from the ores of copper, zinc, lead, gold, silver, graphite, molybdenum, mercury, etcetera...WALTER Former HARVEY WEED, E.M. Geologist in the U. S. Geological Survey, 1883-1906; Member Institution...the iron mining companies of the Lake Superior district is given, and the many mining corporations of...letter. The Wellman-Seaver-Morgan Cleveland, Ohio, U. S. A. Branch Offices: New York, Denver, Seattle...of the Mining Industry Production of Metals in the U. S Yearly Average — Metal Prices Prices of Silver |  | | Journal (volume) | | ^ Wl'tT* If-lff' '*I!T*K^lr' U^iv,oi BIBDHG LIST OCT 1 1922; \v INDEX TO VOLUME : . Mining...Ditto at Oroya. Peru Julian & Smart's Cyaniding Gold and Ditto Silver Ores, book review DittL Work and.... . . . 84 193 134 357 218 394 Cyaniding gold and silver ores. Julian & Smart's, book A. W. Allen...216 249 Spraying with atomized metal Synthetic gold Thacher. Arthur 180 389 24S 319 134 minerals relief...A Calculations, book review Hornsilver mining district .J. K. Turner. ... Hulse. E. W.. obituary Co-ordination |  | | Report (issue) | | metals-------------------------------------------- 43. Gold and silver----------------------------------------...deposit in a breccia pipe, po.ssibly with additional gold and silver, or a disseminated molybdenum deposit...with the veins are copper, lead, zinc, silver, and gold. The veins have been intensively prospected in the... bring additional thousands of people into the region. Burgeoning land development on the east flank...d U,. upthro"'n blocK D = downthrol"u I> F~u |  | | Journal (volume) | | exploitation and op- brought $ 1.29 an ounce and when gold, in prevails that, in time to come, better and...-roots. The discovery of the Howell reads al district has been not most like a romance . ed for its...panic of 1907 ; period when Little Cottonwood district was There is always a feeling of mystery and but...Howell then wild and wooley west, when silver district, and especially so when the opinion would be one...that LAKE MINING REVIEW , APRIL the the old shaft should have reached the tun- wonderful Cardiff |  | | Journal (volume) | | g Scientific Press December, July to 121 n u u Page Page Acme Motor Truck Co .Resume Adam, H... 327 Agnew, John A .... 89S Editorial Co Alaska Gold Mines Editorial .... 475 Alaska Treadwell .... 441...Lubricants, book review L. B. Lockhart Amprican-made gold-dred?e for New Zealand . . . . . . . . ...823 324 . . . . Operations of Consolidated Gold Fields of South 881 Africa 747 American Mining Congress...Bailey, F. J. .First-aid Baking . . . and 'gold' ore . . . . . 39 241 479 Editorial .... |  | | Journal (volume) | | CO. New York Office, 42 Broadway PURCHASERS OF Gold , Silver, Lead and Copper Ores ORE PURCHASING DEPARTMENT...MINING PROPERTY OF THE Gold Springs Mining and Power Company Property located at Gold Springs, Utah NOTICE...OF SALE. IN THE DISTRICT UNITED STATES COURT IN AND OF FOR THE THE DISTRICT OF UTAH , MASTER'S...Trust Company , a corporation , plaintiff, vs. Gold Springs Mining & Power Company , a corporation ...Electric Company , a corporation , plaintiff, vs. Gold Springs Mining & Power Company, a corporation, |  | | Journal (volume) | | Montreal Sorby, Fahrenwald, F. A., Cleveland, U. S. Fieldner, A. C, Washington, D. C Foley, Hamilton...Arm 786 Steel Industry Projected '4^ 467 Stewart District Silver Ores, —V. Dolmage 454 Tetrahedrite Occurrences...Grav Sydney Coast Erosion Gold 30 Canada— 1919 Cobalt Production Argonaut Gold Mine, —C. W. Knight, Geol...Placers in Ontario, Dr. Coleman 221, 752 Matachewen Gold Area,—A. G. Burrows, Geol. Report505, 950 Mclntyre-Porcupine...Hollinger Mine 957 Porcupine Gold Mines, Some Notes 856 Porcupine Gold Companies' Assessment Appeal 177 |  | | Journal (volume) | | an oval alot By eliding the oylinder along the shaft any de- in mloing regions all over the coaat. made...are awakening to the realization of. California's gold gave the nation when the monarchiea of the Old World...The experience of the world has demoosttated that gold and silver constitute the only and safe, conveaient...reliable basis of credit Whereas, The output of gold is largely below the needs of mankind ; and Whereas...detritus from said mines entering the streams. All gold raining in California is hydraulic, being the same |
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