 | | Journal (article/letter/editorial) | | ites fromthe Wet MountainsArea, Fremont and Custer Counties,Colorado TnEOr)ORE J. ARMBRUSTMACHER Abstract...Carbonatites associated with alkalic rocks of the McClure Mountain and Gem Park Complexes, andthecomplex at...(1.45 b.y.) (Taylor et al., 1975a,b) (Fig. Park Complex(Parker and Sharp, 1970) outlined 1). variousdetailsof...the McClure Mountain dikeswere mappedwithin the Iron Mountainmafic- Complex,the Gem Park Complex,and...and the complex ultramaficportion of the McClure Mountain Com- at Democrat Creek. The mafic-ultramaficparts |  | | 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...petrology 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 |  | | Journal (article/letter/editorial) | | ALKALIC ROCKS OF THE ARKANSAS RIVER AREA, FREMONT COUNTY, COLORADO.4. THE PINON PEAK BRECCIA PIPES1 E. Wru...Assrnecr The Pinon Peakbrecciapipesin Fremontcounty, colorado,are satelriticto the tion are recorded, thus...bodies of the alkalic province of Fremont and custer counties, colorado. The pinon peak breccia pipes, herein...described,are satellitic to the Mcclure Mountainrron Mountain complex, just as the Democrat creek comprex...s (3.3 airline miles) from its consanguineous complex, whereasin Democrat Gulch the brecciasare adjacent |  | | Journal (article/letter/editorial) | | Complexes in the Wet Mountains Area, Fremont and Custer Counties, Colorado Theodore J. Armbrustmacher and Carl...Carl E. Hedge US Geological Survey, Denver, Colorado 80225, USA Abstract. Concentrations of Rb, Sr, and...alkaline complexes in the Wet Mountains area, Colorado, show that rocks formed as end-products of a variety...syenite in the McClure Mountain Complex, nepheline syenite pegmatite in the Gem Park Complex, and quartz...quartz syenite in the complex at Democrat Creek. The nepheline syenite and hornblende-biotite syenite at McClure |  | | Report (issue) | | Carbonatites of the Gem Park Complex, Custer and Fremont Counties, Colorado GEOLOGICAL SURVEY PROFESSIONAL...CARBONATITES OF THE GEM PARK COMPLEX, CUSTER AND FREMONT COUNTIES, COLORADO S a n g re d a C r i s... GEM MOUNTAIN Sawatch Range ark -Cbtrfplex ving pyroxenite and gabbro of the Gem Park Complex. -«...Carbonatites of the Gem Park Complex, Custer and Fremont Counties, Colorado By RAYMOND L. PARKER and WILLIAM...GEOLOGICAL SURVEY PROFESSIONAL PAPER 649 The Gem Park Complex its geology and mineralogy, and its niobium distribution |  | | 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 |  | | Report (volume) | | Mafic-Ultramafic Layered Intrusion at Iron Mountain Fremont County Colorado GEOLOGICAL SURVEY BULLETIN 1251-A... Mafic-Ultramafic Layered Intrusion at Iron Mountain Fremont County Colorado By DANIEL R. SHAWE and RAYMOND L...funnel-shaped intrusive complex associated with younger alkalic rocks of the McClure Mountain Complex UNITED STATES...mafic-ultramafic layered intrusion at Iron Mountain, Fremont County, Colo____- ________ In pocket 1. Geologic...the McClure Mountain Complex showing location and geologic setting of the mafic-ultramafic complex at |  | | Book (edition) | | Carbonatites are now the major sources of RE elements (Mountain Pass, California) and of Nb (Oka, Quebec and Araxa...detailed geological survey of the Alné Island complex and announced his results in a series of papers...most of the field work on the Iron Hill complex of Gunnison County, Colorado, in 1912-1913. Although his...never accepted the idea of an igneous origin for the Iron Hill carbonatite. In 1924 Bowen, who had visited...fairly pure calcite (Garson and Smith, 1958). The complex was first studied by F. Dixey, and it was he who |  | | Report (issue) | | pipes in the Bokan Mountain district of Alaska, carbonatite dikes, and apatite-bearing iron deposits in the................. . Veins and Pipes in the Bokan Mountain District, Alaska ...................................... . 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 ..................... |  | | 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...2·1 Cariboo-Bell 22 Horsefly Creek 23 Takomkane Mountain area 2 4 B l u e River area 25 Verity 26 Rayfield...29 Perry R i ver 30 Mount Copeland 31 Trident Mountain 32 K i n basket Lake 33 Mount Laussedat 34 Mount...64 65 66 67 68 69 70 71 72 73 74 75 76 Kruger Mountain Rossland dyke Crowsnest volca nics Sweet G rass |  | | Journal (article/letter/editorial) | | beforsite; (iii) ferrocarbonatite which carries essential iron-rich carbonate minerals; and (iv) natrocarbonatite...Armbrustreacher (1979) from the McClure Mountain, Gem Park, and Democrat Creek areas of Colorado, where primary magmatic...the characteristic minerals such as pyrochlore, aegirine-augite, and the RE phosphates and carbonates,...volcanic cone on the south flank of Homa Mountain carbonatite complex in western Kenya (Le Bas, 1977). Carbonatitic...of calcite with or without minor proportions of iron oxides and some silicate minerals. Natrocarbonatite |  | | Journal (article/letter/editorial) | | Copyright © 1997 Elsevier Science Ltd Printed in the USA. All rights reserved 0016-7037/97 $17.00 + .00 Pergamon...pegmatite quartz from the Strange Lake peralkaline complex has been analysed by gas chromatography using online...of H2 during the alteration of arfvedsonite to aegirine, and the subsequent reaction of this H2 with orthomagmatic...composed of quartz, microcline, albite, arfvedsonite, aegirine, and raremetal minerals, which range in grain...event involved replacement of arfvedsonite by aegirine plus magnetite and quartz (Salvi and Williams-Jones |  | | Report (issue) | | Washington Zinc ore, Friedensville, Pa. Banded iron-formation. Palmer, Mich. 6. Ribbon asbestos ore...Peninsula, Mich. 10. Porphyry molybdenum ore, Colorado 11. Zinc ore, Edwards, N.Y. 12. Manganese nodules...Elements in the Powderhorn District, Gunnison County, Colorado By JERRY C. OLSON and DAVID C. HEDLUND GEOLOGY...elements in the Powderhorn district, Gunnison County, Colorado. (Geology and resources of thorium in the...rocks. 2. Intrusions (Geology)—Colorado—Gunnison Co. 3. Thorium ores—Colorado—Gunnison Co. I. Hedlund, David |  | Weng, Qiang, Yang, Wu-Bin, Niu, He-Cai, Li, Ning-Bo, Shan, Qiang, Fan, Guo-Qiang, Jiang, Zhao-Yong (2021) Two discrete stages of fenitization in the Lizhuang REE deposit, SW China: Implications for REE mineralization. Ore Geology Reviews, 133. 104090pp. doi:10.1016/j.oregeorev.2021.104090 | Journal (article/letter/editorial) | | Keywords: Lizhuang REE deposit Syenite-carbonatite complex Two-stage fenitization REE remobilization and precipitation...occurs in and around the alkaline-carbonatite complex, and is closely associated with rare earth elements... SW China, is hosted in a syenite-carbonatite complex with low- and high-grade fenitization. In this...unaltered regions and host rock syenite-carbonatite complex (0.70566–0.70666). It is suggested that the fenitizing...fluids were exsolved from the syenite-carbonatite complex in a relatively closed system. As the increase |  | | Report (issue) | | schematic cross section through a carbonatite complex - - - - - - - -- --- - Map showing location and...and corrosion resistance, is combined with cobalt, iron, and nickel to produce refractory superalloys. Smaller...less than 1 percent of alloying elements other than iron and manganese. There is widespread and increasing...as a niobate (but rarely, or never, columbate) of iron or manganese. 4 40 c: 0 ·u ::J- .,en 30 0...work for a laboratoryscale pilot plant to process complex ore from the Brockman rare-earth-element deposit |  | | Book | | long (Marty, 2004 ). AFRICA widely in Litchfield County, where good crystals were taken from quartz veins...region (Brunet, I 977b ). NEW YORK Amity, Orange County. At many isolated collected sites between the towns...CANADA BRITISH COLUMBIA Ice River complex. The Ice River complex is an intrusive body of alkaline igneous...Litchfield County. Ilmenite masses and crystals from somewhere near Washington, Litchfield County, were described...Lake Road occurrence, Faraday Township, Hastings County. In fall 1994, Dan and Shelley Lambert extracted |  | Stamm, Natalia, Schmidt, Max W., Szymanowski, Dawid, von Quadt, Albrecht, Mohapi, Thabang, Fourie, Andre (2018) Primary petrology, mineralogy and age of the Letšeng-la-Terae kimberlite (Lesotho, Southern Africa) and parental magmas of Group-I kimberlites. Contributions to Mineralogy and Petrology, 173 (9) doi:10.1007/s00410-018-1502-1 | Journal (article/letter/editorial) | | Bunsenite (Ni), Pyrolusite (Mn), Forsterite (Mg), Aegirine (Na), Microcline (K), Apatite (P) Other Silicates...Scapolite (Cl), Barite (S), Strontianite (Sr), Aegirine (Na), Sythetic CeO (Ce) Calcite (Ca), Magnesite...Chromite (Cr), Bunsenite (Ni), Pyrolusite (Mn), Aegirine (Na), Perovskite/Spinel 3 20 40/20 except 15/7...Bunsenite (Ni), Pyrolusite (Mn), Forsterite (Mg), Aegirine (Na), Microcline (K), Apatite (P) Bulk Composition...Chromite (Cr), Pyrolusite (Mn), Forsterite (Mg), Aegirine (Na), Microcline (K), Apatite (P), BaTiO3 (Ba) |  | | 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...spectrophotometric determination of titanium, total iron, niobium, phosphorus, and vanadium, by Robert Meyrowitz |  | | Report (issue) | | ) As a general rule, if both ferric and ferrous iron were reported by the analyst, we present an unadjusted...Kakanui Hornblende, NZ Minnesota Hornblende, Fremont County, CO Sodic Fluor-richterite, Synthetic Apatite...*FSBO Benson Orthoclase *FSLC Plagioclase, Lake County, Oregon *FSNA Nunivak Anorthoclase, AK FSTA Tiburon...0X51 0X52 Corundum, Synthetic Chromite, Bushveld Complex, S. Africa Corundum Gahnite, Brazil Hausmannite...Chromite 55G-4, Still water Complex, MT Chromite 55G-15AB, Still water Complex, MT Pyroxene PXAC PXAD *PXA6 |  | | Report (issue) | | Alaska--4230 University Dr., Rm. 101 • LAKEWOOD, Colorado-Federal Center, Bldg. 810 • MENLO PARK, California-Bldg...Paris, France, August 26-31, 1974 Snowmass, Colorado, USA, August 20-25, 1978 Nikko, Japan, June 27-July...and Electric Company Western Mining Corporation (USA) VMI, Inc. iv ICOG-8 Organizing Committee Gamiss...PROVENANCES OF HOLOCENE SAND DUNES, NORTHEASTERN COLORADO AND THE NEBRASKA SAND HILLS ALEINIKOFF John N...Survey, Box 25046, DFC, MS 963, Denver, CO, 80225, USA P. Agrinier, M. Javoy (Lab. G&>chimie Isotopes Stables |  | | Journal (article/letter/editorial) | | either fossil or vegetation fuels both emit a complex array of particles. The resulting aerosol contains...Department of Geosciences, Virginia Tech, Blacksburg, VA, USA. email: (caddick@vt.edu) Attainment of high or ultra-high...South Carolina, Columbia, South Carolina 29208, USA (moore@geol.sc.edu) We utilized 224Ra/228Th disequilibrium...to fluorosis. Since SPL leachate is in fact a complex chemical cocktail which also contains other contaminants...Sciences, Stanford University, Stanford CA 94305, USA. Minerals provide a large wealth of environmentally |  | | Journal (issue) | | Ihre Sicherheit Die Profitaschenlampen aus den USA. Ab 34,95 DM Die MAG-UTE® D-cell werden je nach Modell...rikholdig meny..., oppleveln,. Thomas Range, Juab County, l tah, Part 1 IJL-,R .._, _..._,..,.ofAfdU-:11...P1usJt,git. ■ i»rlll tlx.iDR...Lil] a Club! In 1bt USA <~ A.wx:ia!PW PfCanlda <~ . ,cw .J ~ - - - ~...aufgepaßt: ,,ex.ac.ukrRBurl/Min- HislNel/welcome.hlml" USA: ,,nb.nel.-downs/ downsrm.hlm". LEsnINERAlJX DlYMASSIF...Pb-Zn-Cu-Mineralisation von Viburnum-Trend, Missouri, USA. Videofilm: Grubelnik/Mitterbacher - .. Aus alten |  | | Report (issue) | | HELD AUGUST 20-25, 1978 IN SNOWMASS-AT-ASPEN, COLORADO UNITED STATES OF AMERICA 291075 PREFACE The...International Conference in Snowmass-at-Aspen, Colorado, U.S.A., are Carnegie Institution of Washington...zircons and monazites from a mafic to ultramafic complex and its country rocks (Sauviat-Sur-Vige, French...intrusions and inclusions of the Ascutney Mountain complex, Vermont, by K. A. Foland and R. P. Lesser...geochronology of Precambrian rocks of the Ovruch buried mountain range, northwest Ukraine, by Igor M. Gorokhov |
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