 | | Journal (article/letter/editorial) | | somemetamorphic Precambrian iron-formations in southwestern Montana INon P. Itr.fir,Igce eNo CoRtrlgt-IsKLEIN, JR....iron-formations from the Tobacco Root and Ruby Mountains and the Gravelly Range of southwesternMontana were studied...associatedwith the iron-formation in the Ruby Creek area of the Gravelly Range are of chlorite grade. The high...feldspar. Similar assemblages from the Carter Creek area of the Ruby Mountains are relatively amphibole-rich...ferrohyperstheneand andraditegarnet.Amphiboles in the Carter Creek area iron-formations contain more exsolution |  | | Report (issue) | | Bedded Iron Deposits of the Southwestern Ruby Range, Montana , , 'A " U,S. GEOLOGICAL SURVEY PROFESSIONAL...Bedded Iron Deposits of the Southwestern Ruby Range, Montana By HAROLD L. JAMES With a section on THE...THE KELLY IRON DEPOSIT OF THE NORTHEASTERN RUBY RANGE U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1495...and mineral deposits of the southwestern Ruby Range, Montana UNITED STATES GOVERNMENT PRINTING OFFICE...bedded iron deposits of the southwestern Ruby Range, Montana. (U.S. Geological Survey professional paper |  | | Report (issue) | | Deposits of the Tobacco Root Mountains, Southwestern Montana GEOLOGICAL SURVEY PROFESSIONAL PAPER 1187...Deposits of the Tobacco Root Mountains, Southwestern Montana By HAROLD L. JAMES GEOLOGICAL SURVEY PROFESSIONAL...deposits of the Tobacco Root Mountains, southwestern Montana. (Geological Survey professional paper ; 1187)...Supt. of Docs. no.: I 19.16:1187 1. Iron ores--Montana--Tobacco Root Mountains. 2. Geology, stratigraphic-Pre-Cambrian...__________________________________ 12 Carmichael Creek (2) ____________________________________ 13 Boulder |  | | Journal (article/letter/editorial) | | cores of many northern Rocky Mountain uplifts in Montana, Wyoming, and South Dakota, and in the southwesternstates...iron-formation stratigraphy,however, differ greatly from one range to another; it is likely that each area of iron-formation...contemporaneous sediments. The iron-formations range in thicknessfrom about 100 feet to more than 2,000...content of unoxidized rock typically is in the range of 25 to 35 percent. Beds of iron-formation as much...Lithologic associations vary widely: in the Ruby Mountains of Montana, the iron-formation is part of a meta |  | | Journal (article/letter/editorial) | | Petrogenesisand Timing of Talc Formation in the Ruby Range, SouthwesternMontana DALE L. ANDERSON,*DAVID...Abstract Talc depositsin the RubyRange,southwestern Montana,haveformedin Archeandolomitic marblesthat were...sixtalc prospectsin the RubyRange,southwestern Montana,havebeenstudied in detail to developa modelfor...TobaccoRootMountains, Highland Mountains, Gravelly Range, and GreenhornRangeacrosssouthwesternMontana (Fig...(Fig. 1; Berg, 1979; and referencestherein). In the Ruby Rangetwo talc minesare currentlyin production:the |  | | Book (volume) | | 01225 442836) Distributors USA AAPG Bookstore PO Box 979 Tulsa OK 74101-0979 USA (Orders: Tel. (918) 584-2555...Anthophyllite—Gedrite Holmquistite—Ferro-holmquistite Cummingtonite—Grunerite Calcic Amphiboles Tremolite—Actin...analyses representative, wherever possible, of the range of chemical and paragenetic variation. From most...The M4 sites however can be octupied by a wider range of cations and their sizes determine the way in...less common monoclinic amphiboles magnesio-cummingtonite and joesmithite with space groups P2,;/m and |  | | Book | | Pectolite Amphibole Group General Anthophyllite Cummingtonite Grunerite 239 240 242 244 245 245 246 249 252...general range for translucent minerals is n = 1.31-2.7, but most have refractive indices in the range 1.45-2...45-2.0. The minerals in the lower part of this range have various types of nonmetallic lusters; toward...combination of ideal properties throughout the index range of the common nonopaque minerals. Formerly, different...are listed in Tables 2.1 and 2.2 for the lower range of indices. ; GENERAL INFORMATION 6 TABLE |  | | Report (volume) | | 6. Thickness--In meters at the type section; a range is given if known. 1. Texture, structure, distinctive...phyllitic and pyritic quartzite intervals 5. Gray 6. Range 1500-2100 m 9. Overlies Heflin Phyllite (Talladega...Cleburne County. Absaroka Supergroup/Volcanic Supergroup U ABRK03 1. Eocene 2. Wyoming (NW), Montana 3. Smedes...m 8. Washburn Group, Sunlight Group, Thorofare Creek Group g. Unconformably underlies Junction Butte...volcanic field, Yellowstone National Park, Park County, Wyo. Academy Church Shale Member (Springer Formation) |  | | Report (volume) | | FERROMAGNESIAN AMPHIBOLES . 325 Mg-Fe in cummingtonite and actinolite Mg-Fe in anthophyllite and the...magnesium-rich cummingtonite Nature of the structural changes Possible anti-phase domains in cummingtonite Anth...Anthophyllite-cummingtonite phase relations MISCIBILITY GAPS AND EXSOLUTION TEXTURES IN AMPHIBOLES Introduction...(tremolite)-anthophyllite Hornblende-cummingtonite (Tremolite) actinolite-cummingtonite Tremolite (actinolite)-riebeckite...beckite Anthophyllite-gedrite Arfvedsonite-cummingtonite Tremolite-richterite Conclusions THE THERMAL |  | | Book (volume) | | Hav T. Morris 2: Mountain City Copper Mine, Elko County, Nevada RoBERT R. Coats F. KERR EDWARD C. STEPHENS...Deposits of the Central Mining District, Grant County, New Mexico so; The Geology of the Iron King...Copper-Molybdenum Mineralization at Mineral Park, Mohave County, 1258 Arizona Jd BIDER J. E. Frost D. M. CLIPPINGER...Sulfide Deposits of the Bagdad District, TSE) County, Yavapai Arizona ARTHUR BAKER, III ROBERT L....Deposits of the Questa Molybdenum Mine Area, Taox County, New Mexico RoBERT Part X. NORTHWESTERN H. |  | | Report (volume) | | Mayr, E., 2. Davis, M. J., 1. Boulder batholith, Montana: Knopf, Various species: Link, T. A., A., 9. 13...Hershey, H. G. , 2. scale: Spieker, E. M., 3. Iron-range rocks, origin: Tanton, Distribution in geologic...described. Div. Mines, 1; Jenkins, O. P., Choctaw County, Highway 17 area: 3. Toulmin, L. D., Jr., 3. Minor:...analysis: KelH. D., 5. ler, W. D., 3. Talladega County, hematiteOklahoma, potash agstone, granite magnetite...ground water: Powham, C. E. ell, W. J., 4. Marengo County: Newton, J. G., 1. Core-drilling program, ChattanooMica: |  | | Report (issue) | | Wilderness study area, Montana, and Blue Joint Roadless Area, Idaho See Montana 17 Boulder-Pioneer Wilderness...Centennial Mountains Wilderness study area, Montana and Idaho See Montana 6 Hells Canyon Study Area, Oregon and...Italian Peak Middle Roadless Areas, Idaho and Montana 19 Mount Naomi Roadless Area, Utah and Idaho See...Scotchman Peak Wilderness study area, Montana and Idaho See Montana 3 Selkirk Roadless Area 5 Selway-Bitterroot...Selway-Bitterroot Wilderness, Idaho and Montana 9 Special Mining Management Zone Clear Creek 13 2 18 15 Ten Mile West |  | | Report (volume) | | 74, Ph miles east of Dutchtown, Cape Girardeau County, Mo. Type section cut by northtrending fault with...stream in NEIA sec. 33, T. 16 N., R. 14 E, Wayne County. Named after village of Abington, about 3 miles...Wildman, Smith, and Darrah Farm sections. Abrahams Creek Member (of Pocono Formation) Mississippian: Central...body of calcareous sandstone designated Abrahams Creek Member. Achiote Conglomerate Achiote Member (of...Mountains, Humboldt County. Occupies belt about 21f2 miles long on western slope of range west of Adam Peak |  | | Report (volume) | | Underlies Church limestone member; overlies Bachelor Creek limestone member. M. R. Mudge, C. P. Walters, and...Bull. 1060-D, p. 193, 252-253, pl. 7. In Nemaha County, Kans., member is basal unit of Howard limestone...Aarde farm, sec. 4, T. 26 S., R. 11 E., Greenwood County. Aaron Slatet Precambrian or Paleozoic: Central...Precambrian. Well exposed at many places along Aaron's Creek, Person and Granville Counties, N.C. Abbott Formation...Babylon sandstone, Manley coal, Tarter coal, Pope Creek coal, and Bernadotte sandstone. Report presents |  | | Book | | especially thank Prof. C. Klein (Indiana University, USA) for his constant attention to and support of my...grateful to Prof. R. Garrels (Northwestern University, USA), Dr. A. Trendall (Geological Survey, Australia)...Australia), and Prof. E. Alexandrov (Queens College, USA) for their interest in the work and discussion of the...thermodynamic analysis of mineral equilibria in a wide range of temperatures and pressures, and study of the...and Ontario; I I = Gogebic Range, Michigan-Wisconsin: I11 = Marquette Range, Michigan; I V = Menominee |  | | Report (volume) | | are as follows: COLORADO. Mineralogy. Montrose County, uranium-vanadium deposits: Weeks, A. D., 13R....Iron, Cook County, titaniferous magnetite: Grout, F. F., 5. IRON. Minnesota, Cook County, titaniferous...Journal. Birmingham, Ala. Ala. Geol. Survey Bull.; County Rept.; Inf. Ser.; Map; Mus. Paper; Special Rept...Rept. Alabama Geological Survey Bulletin; County Report; Information Series; Map; Museum Papers; Special...Ibis. London. Idaho Bur. Mines and Geology Bull.; County Rept; Inf. Circ.; Mineral Res. 16 SERIALS Kept; |  | | Report (issue) | | depositional or diagenetic origin, have a wide range of physical and chemical properties, in part because...hematite, and magnetite; siderite, with a substantial range in amounts of manganese, magnesium, and calcium...iron-formation. The iron-rich rocks have a great range of physical and chemical characteristics. In part...Taylor's material are zoned, which accounts for the range of observed indices. A FeO03... ..................positive elongation, mean indices of refraction that range from 1.62 to 1.66, and birefringence that ranges |  | Amstutz, G. C., Goresy, A. El, Frenzel, G., Kluth, C., Moh, G., Wauschkuhn, A., Zimmermann, R.A. - Eds. (1982) Ore Genesis. Springer Berlin, Heidelberg. doi:10.1007/978-3-642-68344-2 | Book | | . . .. 426 Some Features of Ore Fabric, Sasca Montana Skarn Deposit, Romania E. Constantinescu and G...The University of Michigan, Ann Arbor, MI 48109, USA Hydrothermal Alterations of Conglomeratic Uranium...conglomerates, chloritites and carbonate rock the 0 34 S %0 range was -1.3 to +0.4. For a composite sample of pyrite...Sciences, Hanrard University, Cambridge, MA 02138, USA 2 Department of Earth and Planetary Sciences, Massachusetts...Massachusetts Institute of Technology, Cambridge, MA 02139, USA 26 W. Scott Meddaugh et aI. one or more episodes |
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