 | | Report (issue) | | Idaho Springs District Clear Creek and Gilpin Counties, Colorado Descriptions and Kapa By Robert H. Moench...however, and at the close of the decade only one mine--the Bald Eagle was being worked for its precious-...prospects, Idaho Spring' di.'riot, Cioar Creek and Gilpin Celtics, Colo,, by R. H. MoencL and A. A. Drake...report, 135 mines and prospecLa cire described. The mine*, ami prospects described are those that were accessible...*" ' 'V-:oto f Idiho Sprir.i , C' u- Creek and Gilpin 5 ''-'.: . . by R. H. k'oench o >z:-r FILE, is |  | | Report (volume) | | Idaho Springs District Clear Creek and Gilpin Counties, Colorado GEOLOGICAL (=) I o 00 SURVEY Prepared...Springs District Clear Creek and -i ;i ?i Gilpin Counties, Colorado By ROBERT H. MOENCH and AVERY ALA DRAKE..._________ __________________________________ Sphalerite. _________.__ -_______---_-_-____________'___-_--Galena... PLATE 1. Map of the Idaho Springs district, Colorado, showing location of mines and distribution of...localities, and molecular percentage of FeS in sphalerite.____---______-__ Page 4 5 34 41 56 57 68 74 |  | Hinkle, Margaret E., Adrian, B.M., Briggs, P.M., Fey, D.L., Motooka, J.M., O'Leary, R. M., Papp, C.S. (1994) Analytical results for monitored soil-gas concentrations (1991-1992) and for analyses of soil samples collected at the Kokomo Mine, Central City, Colorado. Open-File Report Vol. 1994 (94-289) US Geological Survey doi:10.3133/ofr94289 | Report (issue) | | SOIL SAMPLES COLLECTED AT THE KQKCMO MINE, CENTRAL CITY, COLORADO By M.E. Hinkle, B.M. Adrian, P.M. Briggs...base-metal-bearing quartz vein at the Kokomo mine, near Central City, Colorado. Soil samples were collected and anlyzed...constituents. Soil-gas concentrations at the Kokomo mine were affected by the same environmental conditions...be useful for geochemical studies at the Kokomo mine. INTRODUCTION Concentrations of Ify, 0*, COn, and...base-metal-bearing quartz vein at the Kokomo mine near Central City, Colorado (fig. 1). Soil samples were collected |  | | Report (issue) | | Geology and Ore Deposits of the Front Range Colorado By T. S. LO\'ERING and E. N. GODDARD GEOLOGICAL...in cooperation with the Colorado State Geological Survey Board and the Colorado Metal Mining Fund ~ oopr...Pre-Cambrian deposits _________________________ _ Mine descriptions __________________________ _ 39 39...disseminations_ Cotopaxi mine _____________________ _ Copper deposits in Jefferson County __ _ F. M.D. property...property _____________ _ Malachite mine ________________ _ Empire mine __________________ _ Hypothermal replacement |  | | Journal (volume) | | Flotation Processes at F. II. Jackson Proprietary Mine, He Treatment at G. D. Del prat Brown, Walter 8...Changes at Cherry Creek John A. Reld The Vulture Mine C. W. Purlngton Arnold, C. Everard The Sherman Concentrating...Channels of 567 Copper In Shasta County Copper of Shasta County (I, The Mineral Industry During...Hecla Editorial Campbell, Donald F copper ol Shasta County, California (1,11) anadlan .Mining Institute, The...Walter 189 284 The 320 Boarding House, The Mine F. N. Fletcher Bob-Tailed Words. Those Matt. W. |  | | Report (volume) | | the generous support of thousands of individual mine operators, distributors, and consurnors, as wdl...its fotulity rate, mainly because of a series of mine disast;ars. 'Wherens only 1 major explosion occurI'e(l...iron values in United States total; (2) tlw uso of mine figures for gold, silver, copper, lead, and zinc...California ... -···- .. - . -.... -·· -- .. - .. . Colorado .... -·--- ....... -·-·--- .. -··· Connecticut...or iron valuation, nn,! tor <11.lmr rn 1,t11 !~ mine production (recoverable content of metals) is the |  | | Journal (volume) | | ' ' ; PAGE Abercom E. District Accounts, Mine Accounts, Gold Mining Acheson's Inventions H Ackermann...246, 327, 404 Clubs and Societies Coal Lands in Colorado R. Peel Coal Mining Coal Nationalization in Australia...^ r / 44 *j Dictionary, Technical Dolcoath Mine. Dos ,, r* * ; hasott. Estrcllas. E PiS-'... , Electrochemical Analysis „„ rf Gaika Gold Mine lienor''" ne P . J . H,'!!'^, ...iji.i.l. ...460 462 415 212 3M THE MINING MAGAZINE PAGE Mine Valuation Jenkins, H. C Johannesburg Letter Joplin |
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