 | | Report (issue) | | Associated Carbonatites of the Gem Park Complex, Custer and Fremont Counties, Colorado GEOLOGICAL SURVEY PROFESSIONAL...ASSOCIATED CARBONATITES OF THE GEM PARK COMPLEX, CUSTER AND FREMONT COUNTIES, COLORADO S a n g re d a C r...,,'*^ ,,' -aCr* Gem Park, Colo. View northwestward from Democratic Mounta GEM MOUNTAIN Sawatch Range...-Cbtrfplex ving pyroxenite and gabbro of the Gem Park Complex. -« "*» +** 4ifa. Mafic-Ultramafic Igneous...Associated Carbonatites of the Gem Park Complex, Custer and Fremont Counties, Colorado By RAYMOND L. PARKER and |  | | Report (issue) | | Peninsula, Mich. 10. Porphyry molybdenum ore, Colorado 11. Zinc ore, Edwards, N.Y. 12. Manganese nodules...Elements in the Wet Mountains Area, Fremont and Ouster Counties, Colorado By THEODORE J. ARMBRUSTMACHER GEOLOGY...elements in the Wet Mountains area, Fremont and Custer Counties, Colorado. (Geology and resources of thorium...16:1049-F 1. Thorium ores—Colorado—Wet Mountains Region. 2. Earths, Rare—Colorado—Wet Mountains Region. 3...Mountains Region. 4. Mines and mineral resources—Colorado—Wet Mountains Region. I. Title. II. Series. III |  | | Report (issue) | | deposits in the Wet Mountains area, Fremont and Custer Counties, Colorado By T. J. Armbrustmacher Open-File...deposits in the Wet Mountains area, Fremont and Custer Counties, Colorado 1 By T. J. Armbrustmacher Introduction...of the Wet Mountains of south-central Colorado in southern Fremont and Custer Counties. The thorium deposits...Arkansas River on the north, the Custer-Huerfano County line on the south, the Use fault on the east, and...Conference held December 8-10, 1975 at Golden, Colorado. Figure 1. Location and geologic map of the |  | | Journal (article/letter/editorial) | | Canada;Iron Hill, Powderhorn district, Colorado;and covered. GemPark,Colorado(Fig. 1). Althoughthe four study...Similarly, the HOH-bending vibration district,Colorado;O -- Oka Carbonatite,Quebec,Canada. mode,coupledwith...Procedures IH = Iron Hill, Powderhorn district, Colorado; GP = Gem Park 1984). Manyrock-forming mineralshavebroadabsorption...Fe+2andFe+3(HuntandSalisbury, 1970). Geological Survey, Denver, Colorado; and from Electronicabsorption processes alsoare... zircon Albite, microcline, richteritc (?), phlogopite,quartz, zircon, rutfie, allanitc(Ce, Ca, Y)• |  | | Journal (article/letter/editorial) | | ites fromthe Wet MountainsArea, Fremont and Custer Counties,Colorado TnEOr)ORE J. ARMBRUSTMACHER Abstract...with alkalic rocks of the McClure Mountain and Gem Park Complexes, andthecomplex at DemocratCreek,canbeclassified...hornblendegneisses, associated with and cuttingrocksof the Gem Park and amphibolites--andPrecambrianintrusivegran...Subsequentwork at the Gem Plumeage (1.45 b.y.) (Taylor et al., 1975a,b) (Fig. Park Complex(Parker and Sharp...mappedwithin the Iron Mountainmafic- Complex,the Gem Park Complex,and the complex ultramaficportion of the McClure |  | | Report (issue) | | in the Wet Mountains Area, Custer and Fremont Counties, Colorado GEOLOGICAL SURVEY PROFESSIONAL PAPER...in the Wet Mountains Area, Custer and Fremont Counties, Colorado By THEODORE J. ARMBRUSTMACHER GEOLOGICAL...of rocks of the McClure Mountain Complex, Gem Park Complex, and complex at Democrat Creek and associated...in the Wet Mountains area, Custer and Fremont Counties, Colorado. (Geological Survey Professional Paper...16:1269 1. Alkalic igneous rocks. 2. Petrology Colorado Wet Mountains. I. Title. II. Series. QE462.A4A76 |  | | Report (issue) | | ...................... . Powderhorn District, Colorado ................. . Mountain Pass, California...Area, Colorado ................ . Bearpaw Mountains, Montana ................. . Ravalli County, Montan81-...Montan81- Lemhi County, Idaho .. Magnet Cove and Potash Sulfur Springs, Ar· kansas ........................Bearpaw Morntains, Mont.; (5) Ravalli County, Mont., and Lemhi County, Idaho; and (6) Magnet Cove-Potash...one such area, the Dismal Swamp placer in Elmore County, 10 EXPLANATION I 3 1 1 1 1 1 Placer locality |  | | Book | | Lengai natrocarbonatite volcano and the Ilimaussaq complex, but comparative studies on alkaline rocks have...other hand many occurrences are so extensive and complex that the descriptions will only be adequate to...Deloro stock 1 0 1 Sulli vc1n Island 102 K i pawa complex and Lake Tortue 103 Northwestern Quebec dykes 1...Baie-des-Moutons 1 59 K i n g ' s Point 1 60 La Scie complex otre Dame Bay area 161 1 62 Topsails 163 H a re...marbles of Lower Palaeozoic age, or older. The complex consists of an outer zone of quartz monzonite and |  | 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) | | metamorphosed hydrothermal system at Pine Canyon. Piute County, Utah. U.S.A. [abs.]: Mineralogical Society (London)...mineralogy of the Cerrillos copper deposit, Santa Fe County, New Mexico: New Mexico Geological Society Guidebook...1988. Ag-Au-Te mineralization in the Ratagain complex, northwest Scotland: Transactions Institution of...a satellite intrusion of the Palabora igneous complex, South Africa: Economic Geology, v. 81, p. 143-155...for the tectonic development of the southeastern Colorado Plateau boundary: Journal of Geophysical Research |  | | Report (issue) | | schematic cross section through a carbonatite complex - - - - - - - -- --- - Map showing location and...work for a laboratoryscale pilot plant to process complex ore from the Brockman rare-earth-element deposit...Schematic cross section through a carbonatite complex (from Krauss and others, 1982a, after Garson, 1966)...within which the Lovozero Complex (fig. 4), a major carbonatite and alkaline complex, probably supplies a...nations. The supply situation for tantalum is more complex. Much of world output of tantalum is as byproduct |  | | Book | | Netherlands. Special regulations for readers in the USA — This publication has been registered with the Copyright...made in the USA. All other copyright questions, including photocopying outside of the USA, should be referred...colour index. This is, without doubt, the most complex lithologie association to be handled from the point...or in the mine workings at all. The Climax Mo complex is the best known example. Here three generations...150-200 km and are up to 15 km thick. The entire complex is composed of over 800 mappable plutons and small |  | | Book | | Netherlands. Special regulations for readers in the USA — This publication has been registered w i t h the...made in the USA. A l l other copyright questions, including photocopying outside of the USA, should be...colour index. This is, without doubt, the most complex lithologic association to be handled from the point...or in the mine workings at all. The Climax Mo complex is the best known example. Here three generations...150-200 km and are up to 15 km thick. The entire complex is composed of over 800 mappable plutons and small |  | | Report (issue) | | indium, by Robert A. Weeks ---------------------Gem stones, by Robert E. Thaden --------------------...evaluations of a specific mineral deposit have become a complex task for a team of specialists, including not only...dressers, metallurgists, and economists. So many complex factors govern price at any given time that it...mineral supplies-and to start planning. Charles F. Park (1968) wrote of the decrease in mineral supplies...limits to growth: New York, Universe Books, 205 p. Park, C. F., Jr., 1968, Affluence in jeopardy: San Francisco |  | | Report (volume) | | George G. The Metaline district, Pend Oreille County, Washington, [Chap.] 6 in Lead-zinc deposits in...fill of Red Light Bolson, southeastern Hudspeth County, Texas, in Geology of the southern Quitman Mountains...terraces along Maple River in northeastern Clinton County, Michigan, U.S.A. (their morphologic, genetic and...northwest quarter of Lemoine Township, AbitibiEast County [also French edition]: Quebec Dept. Nat. Resources...Mount Rainier, our only glacial volcanic national park: Sci. and Children (Washington, D.C., Natl. Sci |  | | Report (issue) | | quality, and safe use of the land become more complex and difficult, and more critical to the National... Central region __________________________109 Colorado ____________________________109 Kansas ______...Francisco Bay regional studies _ ___ ______284 Colorado Front Range Urban Corridor _____________284 Geotechnical...Geotechnical and geohydrological studies in Fairfax County, Virginia _____________________285 Puget Sound...------ Council on Environmental Quality CFRUC ——__ Colorado Front Range Urban Corridor Project CGIS ------ |  | | Report (volume) | | Rm G-84 DENVER, Colorado--Federal Bldg., Rm. 169, 1961 Stout St. LAKEWOOD, Colorado-- Federal Center...Center, Bldg. 810 MENLO PARK, California--Bldg. 3, Rm. 3128,345 Middlefield Rd. • RESTON, Virginia--National...Diagram of a typical mafic-ultramafic stratiform complex 12 Cartoon cross-section of a typical komatiitic...chromite deposi a typical mafic-ultramafic stratiform complex 41 Chromite grades of pediform chromite deposits...Generalized geologic map of a zoned ultramafic complex 50 Tonnages of carbonatite deposits 52 Grades of |  | | Report (issue) | | 1966 1967 1968 1969 1970 Numerous Federal, State, county, and local agencies and other organizations and...studies •.•••••••..••.••.••••• Precambrian rocks in Colorado .•.••.•••.••••..• SanJuan Mountains, Colo. • •••••••...•.• Arizona .•••.••••••.••.•.•.•.•..••••.•...• Colorado ••••••••••.•••••••••••.•.•..••..• 71 72 72 72...cooperators .............................. . State, county, and local cooperators ................. . Other...ZINC, AND SILVER Silver Cliff and Rosita area, Colorado Surface geologic mapping, augmented by seismic |  | | Report (issue) | | 1965. 1966. 1967. 1968. Numerous Federal, State, county, and local agencies and other organizations and...-___ California. _ __________________________ Colorado ______________________________ Montana. _____...disturbed belt.________________ Yellowstone National Park and vicinity. __ Snake River Plain______________________...Mountains_--_-------------- A41 Precambrian rocks of Colorado.__________ 41 41 Mesozoic stratigraphy.__________________...Dakota___________--------------75 Utah-..-.__-. -77 Colorado-____ ___________-.----77 Kansas.--.__.______-_-_ |  | | Report (issue) | | rare-earth elements in rocks of the differentiated complex of the Lovozero alkaline massif in relation to...to some problems of the genesis of this complex: Geokhimiya 1960, p. 701-713 (in Russian), translation...the rocks and minerals of the Oka carbonatite complex: Quebec. Geochim. et Cosmochim. Acta v. 39, p....molybdenite, and magnetite at Iron Hill, Custer County, Colorado: Econ. Geol. v. 69, p. 508-515 Hogarth, D...and accessory minerals of the Burpala alkalic complex, northern Baikal region: Izvest. Akad. Nauk SSSR |  | | Report (issue) | | _____________________ Arkansas____________________________ Colorado ____________________________ Kansas__________..._________Council on Environmental Quality CFRUC ..Colorado Front Range Urban Corridor Project CGIS _____Canada...Solar-Terrestrial Data Center NLCR ___________nonlinear complex resistivity nm _______________________nanometer...Wilderness Area in the Blue Ridge Mountains of Haywood County, N.C., contains complexly folded, high-grade metamorphic...studies in the Powderhorn Wilderness Study Area, Colorado R. A. Martin reported that magnetic flows of |  | | Report (volume) | | _____________________ Arkansas____________________________ Colorado ____________________________ Kansas__________..._________Council on Environmental Quality CFRUC ..Colorado Front Range Urban Corridor Project CGIS _____Canada...Solar-Terrestrial Data Center NLCR ___________nonlinear complex resistivity nm _______________________nanometer...Wilderness Area in the Blue Ridge Mountains of Haywood County, N.C., contains complexly folded, high-grade metamorphic...studies in the Powderhorn Wilderness Study Area, Colorado R. A. Martin reported that magnetic flows of |  | | Report (issue) | | upper part of the Hanson Creek Formation in Eureka County, Mullens and F. G. Poole . . . . . . . . . . ....distribution in a granite stock near Bull Canyon, Lemhi County, Idaho, by M. H. Staatz, C. M. Bunker, and C. A...Thomas, Keg, and Desert calderas, central Juab County, Utah, by D. R. Shawe 43 51 57 67 Petrology and...reconstituted rocks of Mule Ear diatreme, San Juan County, Utah, by R. A. Cadigan and D. E. Stuart-Alexander...nitrate in ground water and streams, southern Nassau County, Long Island, N.Y., by N. M. Perlmutter and Ellis |
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