Larsen, E.S. (1942) Alkalic rocks of Iron Hill, Gunnison County, Colorado. Shorter contributions to general geology, 1941-42. United States Geological Survey Professional Paper 197-A.

Armbrustmacher, T.J. (1981) The complex of alkaline rocks at Iron Hill, Powederhorn district, Gunnison County, Colorado. in 32nd Field Conference New Mexico Geological Society: 293-296.

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	Hildebrand, Fred A., Conklin, Nancy M. (1974) A Breccia Dike containing Rare-Earth-Bearing Apatite, Molybdenite, and Magnetite at Iron Hill, Custer County, Colorado. Economic Geology, 69 (4) 508-515 doi:10.2113/gsecongeo.69.4.508	Journal (article/letter/editorial)
	containingRare-Earth-Bearing Apatite, Molybdenite,and Magnetiteat Iron Hill, CusterCounty,Colorado* , FRED...HILDEBRAND AND NANCY M. CONKLIN Abstract Rare-earth-bearing apa•ite andmolybdenite werediscovered in...southwestslopeof Iron Hill about 4 miles east-southeast of Silver Cliff, Cust6r County, Colorado. The dike is...percent apatite that contains about4 percentrare-earth elements. The first stagealso containsactinoliteand...volcanicprovince of the Silver Cliff-Rosita mining district. The mineral assemblages of the three closelyrelated
	*(1993) International strategic minerals inventory summary report; niobium (columbium) and tantalum. Circular* 930. US Geological Survey doi:10.3133/cir930m**	Report (issue)
	930-M) "Prepared as a cooperative effort among earth-science and mineral-resource agencies of Australia...N65C68 1993 333.8'5465-dc20 92-41231 CIP FOREWORD Earth-science and mineral-resource agencies from several...tantalum---------------------------------------Mining and processing - - - - - - - - - - - - - - - -...- - - - - - - - - - - - - - - - - - - - Niobium mining and processing - - - - - - - - - - - - - - - -...- - - - - - - - - - - - - - - - - - - Tantalum mining and processing- - - - - - - - - - - - - - - - -
	*Horick, Paul J. (1974) The Minerals of Iowa. Educational Series* 2. Iowa Geological Survey**	Report (issue)
	constantly evolving as man digs and probes the earth. Whenever a quarry is opened or an old one deepened................................................. Quartz .................................................3) 4) 5) 6) Upper Mississippi Valley zinc—lead district Mineral crystals, isometric ....................pocket) Page 82 83 85 Plates Page Page 4) A. White calcite crystals on brown calcite in vugs in dark...crystalline quartz and milky or gray chalcedony. C. Geode containing brown dolomite crystals with quartz, calcite
	*Nason, Frank L. (1892) A Report on the Iron Ores of Missouri. Missouri Geological Survey* Vol. 2. Missouri Geological Survey**	Report (volume)
	STATE GEOLOGIST. VOL. II . A REPORT 0:N THE IRON ORES OF MISSOURI FROM FIELD WORK PROSECUTED DURING...geologist, C. R. KEYES, paleontologist. Specialties : Iron and ~JJfangan ese. H. A. WHEELER, ass't geologist...in Zinc and Lead Work. E. H. LONSDALE, ass't in Iron o,·e Work ancl Detailecl fliapping. T. B. MARBUT...Fields. (iv) E. W. NEWTON, Local Assistant in Polk County. LETTER OF TRANSMITTAL. 0FFICI~ OF THE GEOLOGICAL...the honor to transmit, herewith, a Report upon the Iron Ores of Missouri, by Mr. Frank L. Nason, assistant
	Canil, Dante, Grondahl, Carter, Lacourse, Terri, Pisiak, Laura K. (2016) Trace elements in magnetite from porphyry Cu–Mo–Au deposits in British Columbia, Canada. Ore Geology Reviews, 72. 1116-1128 doi:10.1016/j.oregeorev.2015.10.007	Journal (article/letter/editorial)
	3, Terri Lacourse2, Laura K. Pisiak1 School of Earth and Ocean Sciences, University of Victoria, Victoria... BC, Canada 3 current address: Department of Earth Sciences, University of Toronto, Toronto, ON, MA...between magnetite from skarn and NU porphyry deposit settings. The heterogeneous composition of hydrothermal...to those measured directly in brines trapped in quartz-hosted fluid inclusions from porphyry Cu-Mo-Au...set ACCEPTED MANUSCRIPT 4 from the Ertsberg deposit (Indonesia) with trace elements determined by electron
	*Meinert, Lawrence D. (1984) Mineralogy and petrology of iron skarns in western British Columbia, Canada. Economic Geology, 79 (5) 869-882 doi:10.2113/gsecongeo.79.5.869*	Journal (article/letter/editorial)
	1984, pp. 869-882 Mineralogy and Petrology of Iron Skarnsin Western British Columbia, Canada LAWRENCE...alkalicontentsbut muchhigherNa20/K20 ratios(avg = 2.6). The iron content of intrusions isinverselyproportionalto...associated skarn,suggestinga magmaticcomponentof iron in skarn. Fluid inclusionanalysessuggestthat early...geologyof westernCanada. SKARNdepositswhich are minedfor iron occurin a The presentstudydescribesthe detailed...plutonic-host-rock compositions andgeometries. calcic iron skarns which form in oceanic island-arc As a gr

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Quartz from Iron Hill deposit, White Earth Mining District (Powderhorn Mining District), Gunnison County, Colorado, USA

Quartz from
Iron Hill deposit, White Earth Mining District (Powderhorn Mining District), Gunnison County, Colorado, USA