 | | Report (volume) | | Economic Geology of the Idaho Springs District Clear Creek and Gilpin Counties, Colorado GEOLOGICAL (=) I...Geology of the Idaho Springs District Clear Creek and -i ;i ?i Gilpin Counties, Colorado By ROBERT H. MOENCH...___________ Mines and prospects in the Idaho Springs district ________________ Previous studies.____...___________---______^_______________________ Relation of silver-gold ratios to zonal pattern _________________ Ore b...are in pocket] PLATE 1. Map of the Idaho Springs district, Colorado, showing location of mines and distribution |  | | Report (issue) | | Nines and Prospects, Idaho Springs District Clear Creek and Gilpin Counties, Colorado Descriptions and Kapa...Energy Commission Introduction The Idoiho Springs mining district forms an important segment of tae Front...Range. From 1859, when placer gold was discovered in Idaho Springs and lode gold in Central City, through...from a 50-square-mile area that includes the Idaho Springs and adjacent districts to the north, west, and...and southwest. The adjacent Central City district, which produced ores valued at more than $100 million |  | | Report (issue) | | Deposits Central Part of the Front Range Mineral Belt Colorado By P. K. SIMS and others GEOLOGICAL SURVEY PROFESSIONAL...______________________________ _ History of uranium mining and production ____________ _ Geologic setting...__________ - ___ - ________ -----------Central City district _____________________ ------Quartz Hill-upper...____________________________ _ West Flack mine __________________ _ ~ercer County mine ______________ -German and Belcher...Iron mine, by A. A. Drake, Jr ___________ _ Jefferson-Calhoun vein _________________ _ Kirk mine ____ |  | | Report (issue) | | Geochemical Maps of Stream Sediments in Central Colorado, from New Mexico to Wyoming Open-File Report...Survey Cover: Overlooking North Fork Lake Creek and Colorado highway 82 east of Independence Pass, with... Geochemical Maps of Stream Sediments in Central Colorado, from New Mexico to Wyoming By Robert G. Eppinger...Acting Director U.S. Geological Survey, Reston, Virginia: 2015 For more information on the USGS—the Federal...Geochemical maps of stream sediments in central Colorado, from New Mexico to Wyoming: U.S. Geological Survey |  | | Journal (article/letter/editorial) | | MINERAL-INTERESTING PLACES IN COLORADO By RICHARD M. PEARL Colorado College, Colorado Springs, Colo. The mineral...mineral hobbyist finds much to interest him in Colorado besides the specimens he collects. This article is...and need be mentioned no more except to say that Colorado has at least its share of fine scenery, which...specimens to be collected are likewise diversified. Colorado has more mineral species recorded than any other...summer of 1964 for a complete revision of my book Colorado Gem Trails and Mineral Guide that the idea for |  | | Report (volume) | | Geology of Uranium Deposits in the Front Range, Colorado By P. K. SIMS and D. M. SHERIDAN With sections...mines_______________________________________ Boulder CountY----------------------------------~-----------Jamestown...Generalfeatures--------------------------------------Blue Jay mine, by R. U. King__________________________ Fair Day...mine________________________________________ Nations Treasure mine, by R. U. King___________________ Victory group...group_________________________________________ Gold Hill district_ __ _____ _____ __ __ __ __ ____ __ ____ |  | | Report (issue) | | Front Range Mineral Belt Gilpin and Clear Creek Counties. Colorado GEOLOGICAL SURVEY PROFESSIONAL Prepared...Front Range Mineral Belt Gilpin and Clear Creek Counties, Colorado By E. W. TOOKER GEOLOGICAL SURVEY...Front Kange mineral belt, Gilpin and Clear Creek Counties, Colorado. Washington, U.S. Govt. Print. Off...belt, Gilpin and Clear Creek Counties, Colorado. 1963. (Card 2) 1. Geology Colorado Front Range. 2. Petrology...Petrology Colorado Front Range. 3. Ore deposits Colorado. 4. Mineralogy Colorado Front Range. 5. Metamorphism |  | | Report (volume) | | . 234 " y { " ,-t .. .~,:",. I " , COLORADO "or.! _ +, (~ STATE OF .~ :'(' COL~ADO /... BULLETIN 40 RADIOACTIVE MINERAL OCCURRENCES OF COLORADO AND BlaLlllGRAPHY by James L. Nelson-Moore,...Energy COLORADO GEOLOGICAL SURVEY DEPARTMENT OF NATURAL RESUURCES STATE OF COLORADO DENVER, COLORADO 1978...ete 11 st r ng of rad i aaet 1ve occurrences 1n Colorado, with a comprehensive blbi iography and bibliographic...on the Colorado Plateau sparked several periods of exploratIon that ultimately led to a mining "boom ll |  | | Report (volume) | | ; Garland Peyton, director, division of mines, mining, and geology, department of natural rnsources,...geologist, and Linwood H. Warwick, chief clerk, Virginia Geological Survey, Clrnrlottesville, Va.; Harold...the generous support of thousands of individual mine operators, distributors, and consurnors, as wdl...Bituminous-coal mining suffered the largest increase in its fotulity rate, mainly because of a series of mine disast;ars...Govnr.mn ('.nt C(lncern eel with d ofcnst~. 'l'ho Mining u.n |  | | Report (volume) | | (A) Geology of Precambrian rocks, Idaho Springs district, Colorado, by Robert H. Moench. (B) Geology... Geology of Precambrian Rocks, Idaho Springs District, Colorado By ROBERT H. MOENCH CONTRIBUTIONS...of the Idaho Springs district____________ In pocket 2. Geologic sections of the Idaho Springs district...by present and previous workers in the Idaho Springs district ____________________ ----- ________ ----2-9...ROCKS, IDAHO SPRINGS DISTRICT, COLORADO By RoBERT H. MoENCH ABSTRACT The Idaho Springs district, an area |
|
