 | | Report (volume) | | Zinc-Copper-Lead Sulfides and Zinc Spinel (Gahnite) in Colorado U,S. GEOLOGICAL SURVEY BULLETIN 1550 , ...Zinc-Copper-Lead Sulfides and Zinc Spinel (Gahnite) in Colorado By DOUGLAS M. SHERIDAN and WILLIAM H. RAYMOND...zinc-copper-lead sulfides and zinc spinel (gahnite) in Colorado. (Geological Survey bulletin ; 1550) Bibliography:...Geology, Stratigraphic-Precambrian. 3. Geology-Colorado. I. Raymond, William H. II. Title. III. Series...metamorphosed to lower amphibolite facies Deposits in the Gunnison area . . . . . . . . . . . Economic potential |  | | Journal (article/letter/editorial) | | BASE-METAL SULFIDE OCCURRENCES, COLORADO: A RE-EVALUATION OF GAHNITE COMPOSITION AS A GUIDE IN EXPLORATION...metamorphosed to the amphibolite and granulite facies in Colorado, many of which are spatially associated with Mg-rich...massive-sulfide deposits in Mg-rich alteration zones in Colorado, causes a marked enrichment in the spinel component...deposits. Keywords: gahnite, exploration guide, massive sulfides, magnesium enrichment, Colorado. SOMMAIRE Le...treize gisements de sulfures protérozoïques au Colorado qui ont atteint le faciès amphibolite ou granulite |  | | Report (volume) | | Minerals of Colorado: A 100- Year Record By EDWIN B. ECKEL GEOLOGICAL SURVEY BULLETIN 1 1 14 A...knowledge____________________________________ Future of Colorado mineralogy______________________________________...mineral localities and metallic mineral deposits of Colorado ________________________________ In pocket III...mineral localities and metallic mineral deposits of Colorado, has not been included in this reprint. Many of...especially Fischer and others, 1946). MINERALS OF COLORADO: A 100-YEAR RECORD By EDWIN B. EcKEL ABSTRACT |  | | Report (issue) | | ...................... Characteristics of the Colorado-type (Climax-type) molybdenum deposits readily...... Stratabound Precambrian sulfide deposits, Colorado and southern Wyoming, by D. M. Sheridan and W...of the Southeast Missouri base metal and barite district, by A. V. Heyl..................................structures containing Pags 3 Examples^ Skelletaa District, Sweden Hljura-Kotalenti Belt, Finland Thompson...the Langmuir deposit in Canada and the Kambalda district in Australia. Favorable targets for domestic deposits |  | | Report (volume) | | ............................................. Colorado........................................................................................ 102 District of Columbia ....................................to refer to Geological Survey Bulletin 507, "The mining districts of the western United States," and to...abundant it may have been completely exhausted by mining or quarrying. Deposits of minerals that are widely...because they occur in sufficient quantity to warrant mining for their usual products, but because they furnish |  | | Report (issue) | | 4, A1 2 O 3 26.8, Na 2 O 16.3, Lenni, Delaware County. Crystals. Eyerman, 1911, 11. Composition: Analysis:...Sp.gr LOCALITIES: Berks County: Birdsboro, and Gickerville; Delaware County: Leiperville, Lenni (druses...Felton's farm (Chester), and Ward's quarry; Montgomery County: Sumneytown, and Perkiomenville ; Philadelphia:...cut east of Reading (probably Birdsboro), Berks County. White, Smith, 1910, 540. silky mass of radiating...42 9.86 4.77 13.60 100.69 2.277 LOCALITY: Berks County: Birdsboro. MESOLITE m Na Al Si3Oio.2H O 2 2 |  | | Book (edition) | | down; lowering. — à la mine, — à la poudre, blasting. — hy¬ draulique, hydraulic mining or excavating, abâtardir...spectroscopic and polarimetric work, airure, /. (Mining) thin end of a vein, ais, m. board; plank; (of...amas, to. mass; heap, pile; accumulation; crowd ; {Mining) pipe, pipe vein, amasser, v.t. amass, collect...old-fashioned. m. ancient; old person; senior, to. pi. {Mining) old workings, anciennement, adv. anciently, of...(Ceram.) alquifou. arr., abbrev. (arrondissement) district, arrac, m. arrack. arrachage, arrachement, m. |  | | Book | | CB2 1RP 40 West 20th Street, New York, NY 10011, USA 10 Stamford Road, Oakleigh, Melbourne 3166, Australia...your carefully laid mine field—you do not know where he is until he steps on a mine and blows himself up... Mass spectrometry (Fig. 3.7) is used to deter¬ mine the relative abundances of different isotopes of...water to hydrogen by electrolysis and by deter¬ mining the concentration of 3H with a Geiger counter or...entire history of our planet. This led to deter¬ mining the rates of the major geophysical phenomena, the |
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