 | | 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 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 oresâColoradoâWet Mountains Region. 2. Earths, RareâColoradoâWet Mountains Region. 3 |  | | 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 |  | | 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) | | 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) | | 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) | | 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 |  | | 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 AlnĂ© 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 ..................... |  | | Journal (article/letter/editorial) | | 14627, USA z Branch of Isotope Geology, U.S. GeologicalSurvey, MS 963, Denver, Colorado 80225, USA Abstract...of olivine and phlogopite set in a fine-grained matrix of serpentine, calcite, phlogopite, and magnetite-rich...oceanic environment. The sample is essentially a phlogopite-melilite-olivine pyroxene breccia, dated at 34...perovskite, magnetite, apatite, melanite, nepheline, phlogopite and glass (Nixon and Boyd 1979). The two carbonatites...carbonatites selected for this study are from McClure Mountain, Colorado, and from Magnet Cove, Arkansas. They |  | | 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 |  | Yang, Yue-Heng, Wu, Fu-Yuan, Yang, Jin-Hui, Chew, David M., Xie, Lie-Wen, Chu, Zhu-Yin, Zhang, Yan-Bin, Huang, Chao (2014) Sr and Nd isotopic compositions of apatite reference materials used in UâThâPb geochronology. Chemical Geology, 385. 35-55 doi:10.1016/j.chemgeo.2014.07.012 | Journal (article/letter/editorial) | | radiogenic Sr. However, as apatite can potentially have complex internal structures resulting from multiple thermal...Otter Lake, NW-1, Slyudyanka, UWA-1, Mud Tank, McClure Mountain and SDG) commonly used in UâThâPb geochronology...Otter Lake, NW-1, Slyudyanka, UWA-1, Mud Tank, McClure Mountain and SDG) have not been investigated for their...NW-1, Slyudyanka, Durango, UWA-1, Mud Tank, McClure Mountain and SDG apatite using both solution-based...Otter Lake NW-1 Slyudyanka UWA-1 Mud Tank McClure Mountain SDG SiO2 FeO MnO MgO CaO SrO P2O5 Cl F Total |  | | 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...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...that Oldoinyo Lengai is an ordinary carbonatitic complex apart from the production of natrocarbonatite. |  | 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) | | 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)âColoradoâGunnison Co. 3. Thorium oresâColoradoâGunnison Co. I. Hedlund, David |  | GawÄda, Aleksandra, Szopa, Krzysztof, Golonka, Jan, Chew, David, WaĆkowska, Anna (2021) Central European Variscan Basement in the Outer Carpathians: A Case Study from the Magura Nappe, Outer Western Carpathians, Poland. Minerals, 11 (3) 256 doi:10.3390/min11030256 | Journal (article/letter/editorial) | | org/licenses/by/ 4.0/). 1. Introduction The Carpathians mountain chain in Central Europe stretches for more than...from the eastern Alps and the Vienna Basin to the iron Gate gorge on the river Danube. In the Central Carpathians...characteristic, while the Outer Carpathians comprise a complex nappe system that formed from the Cretaceous through...09, 0.47), rhodoniteâMn (Kα, LIF, 0.03, 0.10), phlogopiteâF (Kα, TAP, 0.04, 0.32), tugtupiteâCl (Kα, PET...apatite reference material in this study. McClure Mountain syenite apatite (the rock from which the 40 |  | Kirkland, C.L., Yakymchuk, C., Szilas, K., Evans, N., Hollis, J., McDonald, B., Gardiner, N.J. (2018) Apatite: a U-Pb thermochronometer or geochronometer?. Lithos, 318. 143-157 doi:10.1016/j.lithos.2018.08.007 | Journal (article/letter/editorial) | | leucosome cutting the TTG to help address some of the complex history of overprinting metamorphism and fluidârock...2010; Paton et al., 2011; Chew et al., 2014). McClure Mountain syenite apatite (Thomson ACCEPTED MANUSCRIPT...474.25 ± 0.41, (Thomson et al., 2012) and Duluth Complex apatite (UâPb SC zircon age of 1099.1 ± 0.2 Ma...regressions, on the secondary references NU Duluth Complex apatite (1112 ± 35; MSWD=0.43; n=24) and MAD apatite...ablation of three standard blocks including the McClure Mountain syenite standard apatite (Thomson et al., |  | BaÄĂk, Peter, FridrichovĂĄ, Jana, Ć tubĆa, JĂĄn, BancĂk, TomĂĄĆĄ, IllĂĄĆĄovĂĄ, Äœudmila, PĂĄlkovĂĄ, Helena, Ć koda, Radek, MikuĆĄ, TomĂĄĆĄ, MilovskĂĄ, Stanislava, VaculoviÄ, TomĂĄĆĄ, SeÄkĂĄr, Peter (2020) The REE-Induced Absorption and Luminescence in Yellow Gem-Quality Durango-Type Hydroxylapatite from MurĂĄnska DlhĂĄ LĂșka, Slovakia. Minerals, 10 (11) 1001 doi:10.3390/min10111001 | Journal (article/letter/editorial) | | crystallization were likely derived from MurĂĄnÌ complex orthogneisses by the Alpine deformation and recrystallization...Cerro de Mercado (Iron Mountains) near the city of Durango, the largest deposit of iron ore in Mexico [21]...and metaperidotites as a typical lower-crustal complex [27,28]. The orthogneisses of the Variscan Upper...solutions during regional metamorphosis of the complex [29]. Apatite from MurĂĄnska DlhĂĄ LĂșka occurs in...MurĂĄnska km northwest northwest of ofthe thecounty county town RevĂșca at an altitude of 345 m above sea level |  | SpiĆĄiak, JĂĄn, VozĂĄrovĂĄ, Anna, VozĂĄr, Jozef, Ferenc, Ć tefan, Ć imonovĂĄ, Viera, Butek, Juraj (2021) Implication of Mineralogy and Isotope Data on the Origin of the Permian Basic Volcanic Rocks of the Hronicum (Slovakia, Western Carpathians) Minerals, 11 (8) 841 doi:10.3390/min11080841 | Journal (article/letter/editorial) | | Veporicum complex of Veporicum [19].zone where Hronicum directly overthrust the crystalline complex The of...MaluĆŸinĂĄ formation represents a volcanosedimentary complex, consisting of polycyclic sequences from small...including mesh 50â100 SrSpecâą (Eichrom Inc., Lisle, IL, USA) resin. Separation of Pb was performed using conventional...apatite reference material in this study. McClure Mountain syenite apatite (the rock from which the 40...derived) was used as a secondary standard. McClure Mountain syenite has moderate but reasonably consistent |  | | 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) | | Prepared in cooperation with the Colorado Geological Survey for the United States Department of Agriculture...Service Development of Industrial Minerals in Colorado Circular 1368 U.S. Department of the Interior...Survey Development of Industrial Minerals in Colorado By Belinda F. Arbogast, Daniel H. Knepper, William...John S. Dersch Prepared in cooperation with the Colorado Geological Survey for the United States Department..., 2011, Development of industrial minerals in Colorado: U.S. Geological Survey Circular 1368, 87 p. Library |  | | 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 |  | Popov, Daniil V., Spikings, Richard A., Scaillet, StĂ©phane, O'Sullivan, Gary, Chew, David, Badenszki, Eszter, Daly, J. Stephen, Razakamanana, ThĂ©odore, Davies, Joshua H.F.L. (2020) Diffusion and fluid interaction in Itrongay pegmatite (Madagascar): Evidence from in situ 40Ar/39Ar dating of gem-quality alkali feldspar and U Pb dating of protogenetic apatite inclusions. Chemical Geology, 556. 119841pp. doi:10.1016/j.chemgeo.2020.119841 | Journal (article/letter/editorial) | | step-heating 40Ar/39Ar dates of biotite and phlogopite vary between ~450â500 Ma (Emmel et al., 2008;...quantities of common Pb (Chew et al., 2014). McClure Mountain apatite (Chew et al., 2014; Schoene and Bowring...Tables (sheet UePb dates). interpret the pyroxene-phlogopite, quartz-feldspar and pyroxene-feld spar rocks...quartzofeldspathic cores (type 6). The friable rock with phlogopite (type 4) occurs at the contact between the pyroxene-feldspar...that are sometimes interlayered with pyroxene-phlogopite rocks (Fig. 2B, C), (3) pyroxene-feldspar rock |  | | Book | | Inc. (SME) 8307 Shaffer Parkway Littleton, CO, USA 80127 (303) 973-9550/(800) 763-3132 www.smenet.org...Sloan 2 kimberlite, Colorado 97 6.7 High wall at Kelsey Lake mine in Colorado with kimberlite breccia...through the center of the Crater of Diamonds vent complex, Prairie Creek, Arkansas 134 7.4 Geological sketch...Argyle mine and mill, Western Australia 282 15.2 Phlogopite-leucite lamproites typically are resistant to...olivine-phlogopite lamproite exposed in a trench 291 15.7 Aerial views. Sloan 5 kimberlite, Colorado, showing |  | | Report (chapter) | | documented by Hess et al. (1987) who had attempted very complex experiments to determine the Ar diffusivity in...experiments were performed by Giletti (1974) on phlogopite. Gilettiâs original data (1974, table 3) are...exceed a few per cent. Figure 2a shows that the phlogopite data do not follow this prediction. In none of...2. Re-evaluation of Gilettiâs (1974) original phlogopite Ar loss experiments. (a) Fractional Ar loss,...termed âsurface O densityâ. Gilettiâs (1974) phlogopite grains had a thickness of 5 mm, which translates |  | Tornos, Fernando, Galindo, Carmen, Casquet, CĂ©sar, RodrĂguez Pevida, Luis, MartĂnez, CĂ©sar, MartĂnez, Enrique, Velasco, Francisco, Iriondo, Alexander (2006) The Aguablanca Niâ(Cu) sulfide deposit, SW Spain: geologic and geochemical controls and the relationship with a midcrustal layered mafic complex. Mineralium Deposita, 41 (8) 737-769 doi:10.1007/s00126-006-0090-6 | Journal (article/letter/editorial) | | the relationship with a midcrustal layered mafic complex Fernando Tornos & Carmen Galindo & CĂ©sar Casquet...University of Colorado at Boulder, Boulder, CO 80309, USA partially crystallized layered mafic complex at about...near surface along with a molten sulfide melt. Phlogopite ArâAr ages are 341â 332 Ma in the breccia pipe...pipe, and 338â334 Ma in the layered mafic complex, and are similar to recently reported UâPb ages of the...critical factors, the emplacement of a layered mafic complex deep in the continental crust and the development |
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