 | | Journal (article/letter/editorial) | | monoclinic pyrrhotites in some sulphide ores from Norway Gu LIANXING* AND FRANK M. VOr,ES Department of...University of Science and Technology, N-7034 Trondheim, Norway Abstract Pyrrhotites in polished sections from...sulphide and magmatic nickelcopper deposits in Norway were studied under the microscope using the magnetic...and Lindqvist, 1979; Gu et al., 1988, 1993). In Norway, however, little work has been published *Present...nickel-copper and stratabound massive sulphide deposits in Norway (see Tables 1 and 2 for deposit names). PYRRHOTITE |  | | Report (issue) | | Holandsfjord . . 71 F. M. Vokes: Observations at Raipas Mine, Alta . . . . 103 Norges geologiske undersøkelse...over Norges geologiske undersøkelses publika~oner og kart . . . . . . . . . . . . . . . . . . . . . ....East-Jotunheimen. With 19 text-figures. Sammendrag: Spessartitt og pseudotachylit fra Jotunheimens skyvesoner . . ....Peridotite at Engenbræ, Holandsfjord, Northern Norway. With 13 textfigures. Sammendrag: Bergartene omkring...71 F. M. Vokes: Observations at Raipas Mine, Alta, Finnmark. With 5 textfigures. Sammendrag: Iakttagelser |  | | Journal (article/letter/editorial) | | Trondheim-Norwegian Institute of Technology, 7034 Trondheim, Norway (Received April 2, 1991; accepted after revision...variety of metals up to the present. The earliest mining efforts on North American representatives were...many of these deposits served as major sources of pyrite which was burned to produce sulfuric acid; the...recovery method rapidly reduced the demand for pyrite and resulted in closure of many of the mines. In...Present-day mining is restricted to a number of deposits in USA, Canada, Sweden and Norway, a number which |  | | Report (issue) | | minerals may include chalcopyrite, sphalerite, galena, pyrite, pyrrhotite, and magnetite. Silver, gold, bismuth...arbitrary 500-m limit may combine deposits within a district (e.g. Quemont-Horne), or subdivide a large deposit...POLYBASITE PROUSTITE PS I LOME LANE PYROLUSITE PYRITE PYRARGYRITE PYROMORPHITE QUARTZ REALGAR RHODOCHROSITE...France Great Britain Guatamala Iran Ireland Japan Norway Oman Pakistan Philippines Portugal Saudi Arabia...ROMERITO ROSTVANGEN RUDTJEBACKEN RUA COVE RUTTAN SABETJOK SAGMO SAIN BEL SAN ANTONIO SAN DOMINGOS SAN GUILLERMO-SIERRA |  | Hodges, C.A., Cox, D.P., Singer, D.A., Case, J.E., Berger, B.R., Albers, J.P. (1984) U.S. Geological Survey-INGEOMINAS mineral resource assessment of Colombia. Open-File Report Vol. 1984 (84-345) US Geological Survey doi:10.3133/ofr84345 | Report (issue) | | complex mineralogy (such as the California-Vetas district) would be useful, not only for exploration in...subtypes are known, one rich in molybdenite and pyrite, the other rich in gold and magnetite. Some deposits...the Eastern Cordillera at the California-Vetas District (Domain 23) (Sillitoe and others, 1982). Undiscovered...indicator of a gold-rich system (Sillitoe, 1979). Pyrite may not be abundant in the copper ore and, for...concentration of copper may also be weak or absent. Pyrite along with sericite and clay may form in late stage |  | | Report (volume) | | rock types 133 Cross section through the Kalavos district Cyprus showing relationship of massive sulfide...based on considerations that extend far beyond the mine itself, in some instances relating to the overall...subject, as in a scale model of the workings of a mine, to a unifying concept that explains or describes...significant tasks. GRADE-TONNAGE MODELS Estimated pre-mining tonnages and grades from over 3,900 well-explored...represents an individual deposit (or, rarely, a district), cumulated in ascending grade or tonnage. Where |
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