 | | Report (volume) | | of the Freeland-Lamartine District, Clear Creek County, Colorado GEOLOGICAL SURVEY BULLETIN This report...of the Freeland-Lamartine District, Clear Creek County, Colorado By J. E. HARRISON and J. D. WELLS GEOLOGY...GEOLOGY AND ORE DEPOSITS OF CLEAR CREEK, GILPIN, AND LARIMER COUNTIES, COLORADO GEOLOGICAL SURVEY BULLETIN...mine. CONTENTS V Page FIGURE 3. Index map of Colorado showing the location of the FreelandLamartine...location of the Freeland-Lamartine district, Clear Creek County.__________________________ 5. Variations |  | | Journal (article/letter/editorial) | | of COLORADO ED RAINES Geology Museum Colorado School of Mines 1310 Maple Street Golden, Colorado 80401...Ouray County. Raines-Pettem collection, photographer unknown. B etween 1868 and 1922, Colorado produced...with another 50 million pounds mined in San Juan County (Henderson 1926). During the twentieth century...mined (Beaty, Landis, and Thompson 1990). Total Colorado production prior to 1958 reached 585 million pounds...copper; Colorado mined gold, silver, lead, and zinc. Nearly all of the copper produced in Colorado has been |  | | Report (volume) | | Range, Summit County Colorado GEOLOGICAL SURVEY Prepared in cooperation with the Colorado State Metal...Northern Part of the Tenmile Range, Summit County Colorado By MAX H. BERGENDAHL CONTRIBUTIONS TO ECONOMIC...BULLETIN 1162-D Prepared in cooperation with the Colorado State Metal Mining Fund Board STATES GOVERNMENT...SUMMIT COUNTY, COLORADO BY MAX H. BERGENDAHL ABSTRACT The Tenmile Range is in north-central Colorado, about...of crystalline gneisses representative of the sillimanite-almandine subfacies of the amphibolite metamorphic |  | | Report (volume) | | Part of the Morrison Quadrangle Jefferson County, Colorado GEOLOGICAL SURVEY BULLETIN 1251-E Geology...Part of the Morrison Quadrangle Jefferson County, Colorado By D. J. GABLE CONTRIBUTIONS TO GENERAL GEOLOGY...rocks along the mountain front due west of Denver, Colorado UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON...PART OF THE MORRISON QUADRANGLE JEFFERSON COUNTY, COLORADO By D. J. GABLE ABSTRACT The Morrison quadrangle...The gneisses now reflect metamorphism of high sillimanite grade, but relic staurolite and helicitic structures |  | | Report (issue) | | Qiiartzite-Schist Sequence Along Coal Creek to Idaho Springs Formation Front Range, Colorado By JOHN D. WELLS, DOUGLAS...Boulder Creek Granite and the quartz monzonite_ __________-__-__---_----_--_-_---_-Boulder Creek Granite...Geologic map of the Coal Creek areaIn pocket FIGUBE 1. Index maps of the Coal Creek area, Eldorado Springs...cordierite. 12 4. Triangular diagram of Boulder Creek Granite.______________________ 13 5. Triangular...QUARTZITE-SCHIST SEQUENCE ALONG COAL CREEK TO IDAHO SPRINGS FORMATION, FRONT RANGE, COLORADO By JOHN D. WELLS, DOUGLAS |  | | Journal (article/letter/editorial) | | REGIONAL METAMORPHISM IN THE NORTHERN FRONT RANGE, COLORADO Abstract: Rubidium-strontium dating of wholerock...A large part of the Precambrian terrane of the Colorado Front Range consists of schists and gneisses which...known rocks of the area (Fig. 1). West of Golden, Colorado, these were named the Idaho Springs Formation...garnet, staurolite, andalusite, sillimanite-muscovite, and sillimanite-microcline zones have been recognized...extensive recrystallization. Granodiorite of Boulder Creek type and quartz diorite were emplaced during the |  | | Report (issue) | | REYNOLDS AREA LAWSON-DUMONT DISTRICT CLEAR CREEK COUNTY COLORADO By J. E. Harrison and B. F. Leonard ...REYNOLDS AREA LAWSON-DUMONT DISTRICT, CLEAR CREEK COUNTY, COLORADO By J. E. Harrison and B. F. Leonard...REYNOLDS AREA LAWSON-DUMONT DISTRICT, CLEAR CREEK COUNTY, COLORADO CONTENTS Page Abstract ...............Sisters groups of claims. The area is in Clear Creek County, Colo., about three-fourths of a mile south...report EXPLANATION JO REYNOLDS AREA + -t- + CREEK MINING CAMP Silver Plume granite ! * * -H LvJ |  | | Report (volume) | | Selected Bibliography of Andalusite, Kyanite Sillimanite, Dumortierite Topaz, and Pyrophyllite in the... Selected Bibliography of Andalusite, Kyanite Sillimanite, Dumortierite Topaz, and Pyrophyllite in the...______-____________________________________ -________ Sillimanite _ _________________________________________________...SELECTED BIBLIOGRAPHY OF ANDALUSITE, KYANITE SILLIMANITE, DUMORTIERITE, TOPAZ, AND PYROPHYLLITE IN THE...compilation of 566 references on the kyanite, or sillimanite, group of minerals and pyrophyllite to December |  | | Report (volume) | | Geology of the Platte Canyon Quadrangle Colorado By WARREN L. PETERSON CONTRIBUTIONS GEOLOGICAL TO...quadrangle. _ In pocket FIGURE 1. Index map of Colorado showing location of the Platte Canyon quadrangle...GEOLOGY GEOLOGY OF THE PLATTE CANYON QUADRANGLE, COLORADO By WARREN L. PETERSON ABSTRACT The Platte Canyon...Front Kange in Colorado (fig. 1). The quadrangle is accessible from the north by county roads that lead...Highway 285 and Colorado Highway 124, from the south by a county road that joins Colorado Highway 67, and |  | | 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 |  | | Report (issue) | | Empire Quadrangle Grand, Gilpin, and Clear Creek Counties ColOrado. By WILLIAM A. BRADDOCK .,..,., GEOLOGICAL...diorite of St. Marys Lake__________________ Bo.ulder Creek Granite__________________________ Quartz diorite...in the Empire quadrangle, Grand, Gilpin, and Clear Creek Counties, Colo __ In pocket 3. Foliation and...plagioclase, quartz, and microcline in the Boulder Creek Granite_________________________ Triangular plot..._________________ Modal compoEition of Boulder Creek Granite___________________________________________________________ |  | | Report (volume) | | the Lawson-DumontFall River District Clear Creek County Colorado By C. C. HAWLEY and FRANK BAKER MOORE...section of the Lawson-Dumont-Fall River district, Clear County, Colo. 2. ~ap showing major faults (veins) of...THE LAWSONDUMONT-FALL RIVER DISTRICT, CLEAR CREEK COUNTY, COLORADO By C. C. HAWLEY and FRANK BAKER...15-square-miles in the Front Range mineral belt, is in Clear Creek County, Colo., just west of the highly productive...parallels 1 2 LAWSON-DUMONT-FALL RIVER DlSTRICT, COLORADO axes of the major folds of the district. A second |  | | Report (volume) | | Monazite Concentrations Central City District Colorado GEOLOGICAL SURVEY BULLETIN Prepared in part...City District Colorado By E. J. YOUNG and P. K. SIMS GEOLOGY AND ORE DEPOSITS, CLEAR CREEK, GILPIN, AND...AND LARIMER COUNTIES, COLORADO GEOLOGICAL SURVEY BULLETIN 1032-F Prepared in part on behalf of the...Generalized geologic map of the Central City district, Colorado.___________________________________________ 67... GEOLOGY AND ORE DEPOSITS, CLEAR CREEK, GILPIN, AND LARIMER COUNTIES, COLORADO PETROGRAPHY AND ORIGIN OF |  | Collins, Donley S., Cobban, Robert R., Foord, Eugene E., Murphy, Jack A. (1989) Bibliography for update and revision of U.S.G.S. Bulletin 1114, Minerals of Colorado -- a 100 year record, by Edwin B. Eckel, Part A - Paper copy --Bibliography data file disks. Open-File Report Vol. 1989 (89-206) US Geological Survey doi:10.3133/ofr89206a | Report (issue) | | Survey Denver, Colorado Department of Geology, Denver Museum of Natural History Denver, Colorado NOTE FOR...revision of U.S.G.S. Bulletin 1114, Minerals of Colorado A 100 year record, by Edwin B. Eckel By Donley...Prepared in cooperation with Friends of Mineralogy - Colorado Chaptar, and the Denver Museum of Natural History...references dealing with the mineralogy of the state of Colorado. It is part of a more than 10 year effort to update...and revise U.S.G.S. Bulletin 1114, Minerals of Colorado: A 100 year record, by Edwin B. Eckel (1961). |  | | Report (issue) | | Some High-Grade Cordierite Gneisses, Front Range, Colorado Dolores J. Gable U.S. Geological Survey, Denver...SOCIETY OF AMERICA, INC. Colorado Building P.O. Box 1719 Boulder, Colorado 80302 Printed in the United...65 65 66 67 ... Vlll CORDIERITE GNEISSES, COLORADO FRONT RANGE Factors determining the mineral assen1blages...75 77 81 85 FIGURES l. Map of Front Range, Colorado ............... ................. .......... ...cordierite-bearing rocks in central part of Front Range, Colorado ................................. ....... ... |  | | Report (issue) | | and Ore Deposits of the Chicago Creek Area Clear Creek County Colorado GEOLOGICAL SURVEY PROFESSIONAL...and Ore Deposits of the Chicago Creek Area Clear Creek County Colorado By J. E. HARRISON and J. D. WELLS...and ore deposits of the Chicago Creek area, Clear Creek County, Colorado, by J. E. Harrison and J. D. Wells...Geology Colorado Clear Creek Co. 2. Ore deposits Colorado Clear Creek Co. 3. Petrology Colorado Clear Creek...nswick (45)__---------------_----------Chemung County (71)____________________ Chicago (161)_---___- |  | | Report (issue) | | Wignerite Occurance on Santa Fe Mountain, Front Range, Colorado By DOUGLAS M. SHERIDAN, SHERMAN P. MARSH, MARY...occurrence on Santa Fe Mountain, Front Range, Colorado. (Geological Survey Professional Paper 955) Includes...bibliographical references. 1. Wagnerite Colorado Santa Fe Mountain. 2. Geology Colorado Santa Fe Mountain. I. Sheridan...gneisses in the Santa Fe Mountain-Beaver Brook-Soda Creek area .............................................oriented parallel to foliation defined by fibrolitk sillimanite............................................. |  | | Report (volume) | | of Precambrian rocks, Idaho Springs district, Colorado, by Robert H. Moench. (B) Geology and coal resources...of Precambrian Rocks, Idaho Springs District, Colorado By ROBERT H. MOENCH CONTRIBUTIONS TO ECONOMIC...OF PRECAMBRIAN ROCKS, IDAHO SPRINGS DISTRICT, COLORADO By RoBERT H. MoENCH ABSTRACT The Idaho Springs... PRECAMBRIAN ROCKS, IDAHO SPRINGS DISTRICT, COLORADO A3 -~5t-l I I II ___fJ __f __ _ Boulder...embraces about 10 square miles, lies athwart Clear Creek Canyon, and is characterized by moderately A4 |  | | Report (issue) | | QlJADRANGLE (TOGETHER 'VITH THE EMPIRE DISTRICT) COLORADo· BY JOSIAH E. SPURR AND GEORGE H. GARREY WITH............................ ___ ... . Biotite-sillimanite schist ........................................................_.......... . Distribution in Colorado ................................................Boulder County.............. . . . . . . . . . . . ......... . ....... . 103 Ores in Gilpin County ............................... . 103 Orcs in Clear Creek County ............................ . 103 Ores from |  | | Report (issue) | | Geology of Precambrian Rocks Central City District Colorado GEOLOGICAL SURVEY PROFESSIONAL PAPER 474-C Prepared... Geology of Precambrian Rocks Central City District Colorado By P. K. SIMS and D. J. GABLE SHORTER CONTRIBUTIONS...1918Geology of Precambrian rocks, Central City district, Colorado, by P. K. Sims and D. J. Gable. Washington, U...district, Colorado. 1964. (Card2) 1. Geology, Stratigraphic Pre-Cambrian. 2. Geology Colorado Gilpin Co...Gilpin County, Colorado. 2. Geologic sections of the Central City district, Gilpin County, Colorado. 3. |  | | Journal (article/letter/editorial) | | number of localities, most of which are in Oxford County (King and Foord 1994). These include pegmatites...recently in a pegmatite at Gillette quarry, Middlesex County, Connecticut. It is reported from a pegmatite near...small pegmatite near Saratoga Springs, Saratoga County, and much later during building construction at...finest chrysoberyl has come from localities in Colorado, as described in detail by Eckel (1961). Chrysoberyl...Squaw Pass, Clear Creek County. Pegmatites in the Drew Hill vicinity of Jefferson County have produced |  | | Report (issue) | | Basement in Colorado GEOLOGIC A I, Rock Units of the Precambrian Basement in Colorado By OGDEN TWETO...TWETO GEOLOGY OF THE PRECAMBRIAN BASEMENT IN COLORADO U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1321-A...igneous rocks in outcrop and the buried basement in Colorado UNITED STATES GOVERNMENT PRINTING OFFICE...1912-1983 Rock units of the Precambrian basement in Colorado. (Geological Survey Professional Paper ; 1321-A)...Geology, Stratigraphic Pre-Cambrian. 2. Geology Colorado. QE653.T9 1986 551.7'1'09788 I. Title. For sale |  | | Report (volume) | | Eureka Gulch Area Central City District Gilpin County Colorado GEOLOGICAL SURVEY BULLETIN This report concerns...Eureka Gulch Area Central City District Gilpin County Colorado By P. K. SIMS, F. W. OSTERWALD, and E. W. TOOKER...GEOLOGY AND ORE DEPOSITS OF CLEAR CREEK, GILPIN, AND LARIMER COUNTIES, COLORADO GEOLOGICAL SURVEY BULLETIN...23 24 27 29 31 IV GEOLOGY AND ORE DEPOSITS, COLORADO ILLUSTKATJONS PLATE 1. Geologic maps of the Eureka...map showing location of Eureka Gulch area, Gilpin County, Colo_________________-.._____--___---__----__3 |  | | Report (issue) | | METAMORPHIC ROCKS OF THE CENTRAL FRONT RANGE. COLORADO By Dolores J. Gable ' Edited bv William. D............................................ 11 Sillimanite-Free Biotite Gneiss ................................................................... 13 Sillimanite-biotite gneiss.................................................................. 13 Garnet-sillimanite-biotite gneiss.............................................................. 14 Cordierite-sillimanite-biotite gneiss ............................. |  | | Report (issue) | | General Geology of the Harold D. Roberts Tunnel, Colorado GEOLOGICAL SURVEY PROFESSIONAL PAPER 831-B General... General Geology of the Harold D. Roberts Tunnel, Colorado By CHARLES S. ROBINSON, LAWRENCE A. WARNER, and...ENGINEERING GEOLOGY OF THE HAROLD D. ROBERTS TUNNEL, COLORADO GEOLOGICAL SURVEY PROFESSIONAL PAPER 831-B......................................... Boulder Creek Granite...........................................Roberts Tunnel line, Park and Summit Counties, Colorado..............In pocket 1. Strike-frequency diagram |
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