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iron mountain titaniferous magnetite western mining history

iron mountain titaniferous magnetite western mining history

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Record Type: Site Operation Category: Past Producer Operation Type: Surface Mining Method: Open Pit Milling Method: Magnetic Year First Production: 1897 Discovery Year: 1850 Years of Production: Organization: Significant: Y

Ore: Magnetite Ore: Ilmenite Gangue: Hypersthene Gangue: Feldspar Gangue: Spinel Gangue: Olivine Gangue: Biotite Gangue: Plagioclase Unknown: Limonite Unknown: Fayalite Unknown: Forsterite

Comment (Production): THE PROPERTY HAS BEEN MINED IN THE RECENT PAST FOR AGGREGATE AND A FEW TONS WERE MINED IN 1897 AND 1898 FOR SMELTING ATTEMPTS BY THE COLORADO FUEL AND IRON CORP. SERIOUS DEVELOPMENT OF THE PROPERTY FOR THE COMMODITIES IN THIS EVALUATION HAS NOT OCCURRED.

Comment (Geology): THE OREBODIES OCCUR AS NUMEROUS DIKES, OFTEN LENTICULAR IN SHAPE. THE MINERALIZED PART OF THE MAIN IRON MOUNTAIN AREA CONSISTS OF DISCONTINUOUS, OVERLAPPING, LENTICULAR BODIES OF MASSIVE MAGNETITE-ILMENITE AND IRREGULAR BODIES OF DISSEMINATED MAGNETITE-ILMENITE EXTENDING ALONG THE CREST OF THE MOUNTAIN FOR 2134 METERS. SINCE THE ORE OCCURS AS NUMEROUS SMALL BODIES, ALL DIMENSIONS CANNOT BE GIVEN. THE DIMENSIONS SHOWN IN THE G-SET ARE THOSE OF THE LARGEST OREBODY. STRIKE IS GENERALLY NE. SINCE THERE ARE A NUMBER OF MAGMATIC OREBODIES CONTAINED IN A PRIMARY MAGMATIC INTRUSIVE, DIP VARIES FROM HORIZONTAL TO VERTICAL.

Comment (Reserve-Resource): THE ABOVE RESERVES WERE OBTAINED DIRECTLY FROM THE MINERAL HOLDERS, ANACONDA AND ROCKY MOUNTAIN ENERGY, AND WERE USED FOR THIS EVALUATION. APPROXIMATELY 72% OF THE ABOVE RESERVES ARE CONSIDERED RECOVERABLE.

Comment (Reserve-Resource): RE-REC 030-GRID AREA 1,SEC.13,14,T18N,R71W.-GRID AREAS 3,4,S 8N,R71W.-GRID AREA 5,SEC.5,T18N,R71W.-GRID AREA 7,SEC. ,R71W.-GRID AREA 75,SEC.4,T 18N,R71W.-GRID AREA 8,T19N,R71W.-GRID AREA 14,SEC.4,T1 RESERVE FIGURES ARE CUMULATIVE FOR ALL 9 GRID AREAS AS ESTIM THE U.S.B.M. (10 TO 50% PROB. FIGURES BASED ON 50% ADDITIONAL RESERVES INFERRED AT DEPTH) [copied from deleted record 10205264 = 0560010036, probably from USBM IC-8037]

Comment (Deposit): GRADE 1-MASSIVE MAGNETITE-ILMENITE WITH 0-35% BY VOLUME OF SILICATES, CHIEFLY OLIVINE AND MINOR SPINEL. TIO2% RANGES FROM 16-23% INCLUSIVE. GRADE 2-MAGNETITE-ILMENITE WITH 35-65% BY VOLUME OF SILICATES, CHIEFLY OLIVINE AND MINOR SPINEL, PLAGIOCLASE, AND HYPERSTHENE. TIO2 RANGES FROM 10-16%. THIS GRADE ORE RARELY CROPS OUT. GRADE 3-MAGNETITE-ILMENITE WITH 65-85% BY VOLUME OF SILICATES, LARGELY PLAGIOCLASE WITH MINOR OLIVINE AND HYPERSTHENE. TIO2 RANGES FROM 5-10% [copied from Bull. 50, p. 106]

Comment (Geology): TYPICAL WEATHERING OF THE GRANITE; CSTR + ZRCN + PCLR + CLMB + TNTL + XNTM; MAIN ORE BODY AT MADEIRA IS 2KM IN DIAMETER, HAS A WEATHERED ZONE 40M DEEP WHICH CONTAINS 300,000T SN, 300,000T NB205 AND 30,000 TA205, AS WELL AS HAFNIUM, YTTRIUM, AND ZIRCONIUM.1.8GA GRANITES IN 1.96A RHYOLITE ASHFLOWS, GRANITES FOLLOWED BY SANDSTONE AND SHALES. AT ABOUT THE SAME TIME, A SERIES OF GRANITES RANGING FROM RAPAKIVI THROUGH PORPHYRITIC GRANITES TO SUBALKALINE BIOTITE GRANITE. GREISENISATION OF BIOTITE GRANITE PRODUCED OREBODY. ORE MINERALS INCLUDE ZIRCON, PYROCHLORE, COLUMBITE, TANTALITE, XENOTIME, CASSITERITE. [copied from 10024852 = ISM0604].

Comment (Production): 1,080,000 MT ORE PER ANNUM (ESTIMATED) IF PRODUCING (1982) NO SIGNIFICANT COMMERCIAL PRODUCTION OF FE OR TI. NO V PRODUCTION. [copied from 10024852 = ISM0604].

Comment (Development): NON-GEOLOGIC CONSTRAINTS ON DEVELOPMENT OR EXPANSION IN 1-5 YRS. ( PROCESSING; X; HIGH COST). DEVELOPMENT(NO); EXPLORATION(NO); ASSESSMENT(DEVELOPMENT WOULD PROBABLY BE BASED PRINCIPALLY ON DEMAND FOR TI (OR FE).); WOULD MOST LIKELY BE DEVELOPED USING THE QIT SLAG PROCESS TO RECOVER A TITANIUM SLAG, A PIG IRON AND POSSIBLY THE VANADIUM [copied from 10024852 = ISM0604]

Comment (General): THIS RECORD WAS COMPILED FOR THE INTERNATIONAL STRATEGIC MINERALS INVENTORY. THE DATA WERE USED IN PREPARATION OF THE USGS CIRCULAR 930 SERIES OF REPORTS. MINERAL RESOURCE CATEGORIES AND CODES HEREIN ARE FROM THE INTERNATIONAL CLASSIFICATION SYSTEM RECOMMENDED BY THE UNITED NATIONS GROUP OF EXPERTS ON DEFINITIONS AND TERMINOLOGY FOR MINERAL RESOURCES. (SEE NATIONAL RESOURCES FORUM, V. 4, NO. 3, P. 307-313.). OPEN-CUT CHEMICALS AND METALS DATE OF ORIGINAL: 10-APR-89; DATE OF LAST CHANGE: 05-MAY-89 [copied from 10024852 = ISM0604]

Comment (Geology): FOLDING, FAULTING AND METAMORPHISM; PREC; VANADIFEROUS MGNT + ILMN + SPNL +- OLVN + APTT + BOTT + FLDP + FRSR; MAGNETITE-ILMENITE OCCUR IN NUMEROUS DIKE-LIKE BODIES. THE MINERALIZED PART OF THE MAIN IRON MOUNTAIN ALSO INCLUDES DISCONTINUOUS OVERLAPPING LENTICULAR BODIES OF MASSIVE MAGNETITE-ILMENITE AND IRREGULAR BODIES OF DISSEMINATED MAGNETITE-ILMENITE. [copied from 10024852 = ISM0604].

Comment (Geology): GEOL.DESC: FINELY INTERGROWN ILMENITE AND MAGNETITE IN MASSIVE AND DISSEMINATED BODIES IN ANORTHOSITE, WHICH HAS BEEN INTRUDED BY LATER GRANITE; ALSO FAULTED. [copied from 1008228 = D00223]

Reference (Deposit): GOLDBERG, S.A., 1984, GEOCHEMICAL RELATIONSHIP BETWEEN ANORTHOSITE AND ASSOCIATED IRON-RICH ROCKS, LARAMIE RANGE, WYOMING: CONTRIBUTIONS TO MINERALOGY AND PETROLOGY, V. 87, P. 376-387.

Reference (Deposit): Pinnel, D.E., and Marsh, J.A., 1954, Summary geological report on the titaniferous iron deposts of the Laramie Range, Albany County, Wyoming: Presented at the Colo. Mining Assoc. meeting, Jan. 30, 1954, 10 p.

Reference (Production): KOPPERS COMPANY, INC. FEASIBILITY STUDY FOR PLANT TO PRODUCE TITANIUM DIOXIDE PIGMENT AND GRANULATED IRON, AUG. 31, 1964, P. III-1 TO III-6, V-6 THRU V-14, DIAGRAMS, VII-1 THRU VII-16.

atlantic city iron mine western mining history

atlantic city iron mine western mining history

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Year: 1970 Description: Iron Pellets 1471000 Metric Tons Pellets/Year Year: 1971 Description: Iron Pellets 1347000 Metric Tons Pellets/Year Year: 1972 Description: Iron Pellets 1564000 Metric Tons Pellets/Year Year: 1973 Description: Iron Pellets 1639000 Metric Tons Pellets/Year Year: 1974 Description: Iron Pellets 1693000 Metric Tons Pellets/Year Year: 1975 Description: Iron Pellets 1639000 Metric Tons Pellets/Year Year: 1976 Description: Iron Pellets 1726000 Metric Tons Pellets/Year Year: 1977 Description: Iron Pellets 1681000 Metric Tons Pellets/Year Year: 1978 Description: Iron Pellets 1551000 Metric Tons Pellets/Year Year: 1979 Description: Iron Pellets 1486000 Metric Tons Pellets/Year Year: 1980 Description: Iron Pellets 1535000 Metric Tons Pellets/Year

Record Type: Site Operation Category: Past Producer Operation Type: Surface Mining Method: Open Pit Milling Method: Magnetic Year First Production: 1962 Year Last Production: 1982 Years of Production: Organization: Significant: Y

Comment (Reserve-Resource): ATLANTIC CITY RESERVES WERE CALCULATED USING PAST PRODUCTION STATISTICS (1977-1980) AND INFORMATION ON PROJECTED MINE LIFE PROVIDED BY COMPANY OFFICIALS. RESOURCE ESTIMATE CALCULATED FROM INFORMATION IN 1984 MINERALS YEARBOOK, VOL. 2, P. 668. THE GRADE IS ASSUMED TO BE THE SAME AS PREVIOUS EVALUATION.

Comment (Ownership): UNIVERSAL PICKED UP THE MINE AND PERMIT IN 1985. THE COMPANY AS OF 1992, THE COMPANY IS UNDER ORDER BY THE STATE OF WYOMING TO RAIZE THE MINE AND MILL PLANT FACILITIES. (CASPER STAR- TRIBUNE, 10/23/92).

Comment (Production): MINE PRODUCTION BEGAN IN AUGUST, 1962 WITH A PROJECTED MINE LIFE OF 30 YEARS. ATLANTIC CITY MINE OCCURS ON BOTH LOUIS LAKE AND MINERS DELIGHT 7.5. MINUTE QUADRANGLES. THE PLANT CAPACITY WAS 4161000 MTPY. PROPERTY REVIEWED BY RC SMITH, 3-87. AT THIS TIME, THE MINE HAS BEEN SHUTDOWN SINCE OCT. 1983 AND IS CONSIDERED TO BE PERMANENT. THE MINE EQUIPMENT WAS SOLD TO UNIVERSAL EQUIPMENT CO. WHO IN TURN AUCTIONED IT OFF.

Comment (Development): ORE PRODUCTION CAPACITY GREATER THAN 3,000,000 TONNES/YEAR. OPERATION SUSPENDED IN 1988. [copied from deleted record 10085076 = W700604, ref is to MINING MAGAZINE, JANUARY 1989, P. 44]

Comment (Ownership): Wyoming State Geological Survey website states: "U.S. Steel mine at Atlantic City (taconite)". [http://www.wsgs.uwyo.edu/Topics/WYEconomics/Metals.aspx, accessed 6/9/2010]

Reference (Deposit): PRIDE, D.E. AND A.F. HAGNER. GEOCHEMISTRY AND ORIGIN OF THE PRECAMBRIAN IRON FORMATION NEAR ATLANTIC CITY, FREMONT COUNTY, WYOMING. BULL. ECON. GEOL., V. 67, 1972, PP. 329-338.

Reference (Deposit): RIDGE, J.D. ORE DEPOSITS OF THE UNITED STATES, 1933-1967, THE GRATON-SALES VOLUME. AMER. INST. OF MINING, METALLURGICAL, AND PETROLEUM ENGINEERS, INC., NEW YORK, 1ST ED., 1968, PP. 590-604.

Reference (Deposit): CAMERON ENGINEERS. REVIEW AND FORECAST - WYOMING MINERAL INDUSTRIES. A REPORT PREPARED FOR THE WYOMING NATURAL RESOURCE BOARD AND THE STATE WATER PLANNING PROGRAM. 1969, PP. 160-227.

Reference (Deposit): BROWN, D.B. AND E.F. HARVEY. WYOMING ENERGY CONSUMPTION. A REPORT PREPARED FOR THE MINERAL DEVELOPMENT DIVISION OF THE DEPARTMENT ECONOMIC PLANNING AND DEVELOPMENT, STATE OF WYOMING. BICKERT, BROWNE, CODDINGTON AND ASSOCIATES, INC., 100 SOUTH MADISON, DENVER, COLORADO 80209. JUNE 1975, PP. 41-43.

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