 | | Journal (article/letter/editorial) | | exposed to near-surface weathering environments: chalcocite and the somewhat less abundant covellite. Both...discovery in an active mine makes them briefly available to collectors. Chalcocite has been featured in...chalcopyrite, chalcocite, enargite, arsenopyrite, sphalerite, and bornite. Excellent chalcocite pseudomorphs...description of the fundamental chemistry of covellite, chalcocite, and related secondary copper minerals and of...sulfide minerals or intimately associated with chalcocite in a somewhat sooty, fracture-filling mixture |  | | Report (issue) | | Piedmont, Italy—and some are from unique but fairly familiar finds—boleite from the Amelia mine, Baja California...==== Sapphirine, 3 cm, from Androy, Toliary Province, Madagascar. The Arkenstone specimen and photo...mining area, Herrería-Valdáliga-Rionansa, Santander Province (region of 4 ===============================...classic—witness (below) the galena from the Dörnberg mine, Ramsbeck district, Nordrhein-Westfalen, Germany...recent finds on the dumps of the old La Vidale lead mine, Bréziès, Asprières, Aveyron, France, there is this |  | | Report (issue) | | on other sulfides. Association: Chalcopyrite, chalcocite, djurleite, bornite, enargite, pyrite, other...material. In Italy, from Vesuvius, Campania [TL] and as large crystals from the Calabona mine, Alghero, Sardinia...Kedabek, Caucasus Mountains, Russia. In the Bou-Skour mine, Bou Azzer district, Morocco. In the USA, from Butte...in Arizona. In the Sierra de Famatina, La Rioja Province, Argentina. Name: To honor Niccolò Covelli (1790–1829)... Mineral Museum, University of Naples, Naples, Italy, 12338. References: (1) Palache, C., H. Berman |  | | Report (issue) | | sphalerite, galena, bornite, tetrahedrite–tennantite, chalcocite, covellite, barite, quartz. Distribution: A widespread...La Rioja Province. In the Philippine Islands, at Mancayan, Luzon. From the Chinkuashi mine, Keelung,...Kaize-mura, Nagano Prefecture, and in the Teine mine, Hokkaido, Japan. In the USA, in splendent crystals...Tirol. From Bor, Serbia. In Italy, on Sardinia, at Alghero and Calabona. At Tsumeb, Namibia. Name: From |  | | Journal (article/letter/editorial) | | Hydrothermal Evolution in the Calabona Porphyry CopperSystem (Sardinia, Italy): The Pathto an Uneconomic... Montreal, Quebec, CanadaH3A2A7 Abstract The Calabona porphyry coppersystem is developed in a small...dacitic intrusion located in northwestern Sardinia (Italy).Earlyhydrothermal alteration produced a potassic...alteration. The earliest fluidthatcirculated in the Calabona porphyry complex hadhighsalinity (40-60 wt % NaC1...mining. Theverylowconcentration of Cu in the Calabona deposit is surprising, in viewof wall-rock alteration |  | | Journal (article/letter/editorial) | | is different. The spectral shapes of bornite, chalcocite, and covellite are distinctly different from...detailed study of enargite alteration at Furtei, Sardinia by MUSU (2007) shows a widespread occurrence of...conditions, although not representative of most mine environments, has been largely studied in relation...material As2O5 arsenopyrite bornite calcium arsenate chalcocite chalcopyrite covellite Cu2O malachite realgar...(Carlo Erba) Natural sample from Baccu Locci, Sardinia Natural sample from Montecatini Val di Cecina |  | | Journal (article/letter/editorial) | | Norrbotten ore province Æ Sweden Introduction Aitik is Sweden’s largest copper mine and one of Europe’s...had been produced since mining began in 1968. The mine has a remaining reserve of 226 Mt of ore with an...of Gällivare, in the northern Norrbotten ore province (Fig. 1). Several other epigenetic copper–gold...ore deposits occur in the region; the entire ore province produces about 90% of the total tonnage of ore...ore province and the Aitik Cu–Au deposit. A The location of the northern Norrbotten ore province in Scandinavia |  | | Journal (article/letter/editorial) | | Washington, DC 20013 pohwatp@si.edu ENARGITE Longfellow Mine, Red Mountain District, San Juan County, Colorado...tennantite from the north orebody of the Longfellow mine, Red Mountain district, San Juan County, Colorado...in turn, may be replaced by bornite, galena, chalcocite, covellite, and pyrite (Uytenbogaardt and Burke...the Longfellow mine, Red Mountain district, San Juan County (fig. 1). The Longfellow mine was discovered...until 1966 when the mine was allowed to flood. Enargite crystals from the Longfellow mine have been found |  | | Book (volume) | | to try to list all of the mining geologists and mine managers who made these visits possible and who...Netherlands-Extreme Western Germany, Switzerland, and Italy. Volume V (or Volume III, Part III) will take up...current electoral and administrative departments. In Italy the deposits are listed alphabetically, except for...east of Coimbra (N40°12 N, 8 ° 2 5 W ) in the province off Beira f Baixa and some 25 km slightly NofW...crude ore averages about 0.3 per cent of WO3. The mine can produce 2000 to 2500 tons per day of tungsten |  | | Journal (issue) | | On The Cover Covellite specimen, Calabona Mine, Sardinia, Italy (ROB LAVINSKY, The Arkenstone/iRocks...(and a few other fortunate campers) to a diferent mine and teach us the techniques of mining there. hey...distant mountains, a lake, and a tiny town. At the mine hauled out various screens of diferent diameters...weathering of primary copper minerals such as chalcocite, bornite, and chalcopyrite. In most cases, covellite...than Butte covellite specimens from the Calabona Mine, Italy are unrivaled in terms of iridescence. WIKIMEDIA |  | | Book | | with Orbis Publishing Limited abcdefgh Printed in Italy by IGDA, Novara Adapted from the original Italian...89 epistilbite 124 arsenic 4 chalcedony 31 chalcocite 8, 8 erythrite 70, 73 argentojarosite 58 arsenates...(Yugoslavia), some mines on Mount Amiata, Tuscany (Italy), and Almadén (Spain). In the United States it...Filiform silver. Nicola Secci, Sarrabus, Sardinia (Italy) Dendritic copper famous (Michigan) 1822...especially near Kimberley); diamonds from the Kimberley mine are embedded in ultrabasic blue rock called kimberlite |  | | | | Translation © Orbis Publishing Limited 1972 Printed in Italy by |GDA, Novara SBN O 85613 0001 For many years...chalcedony 31 arsenates 65 arsenic 4 arsenides 8 chalcocite 8, 8 chalcolite 74 arsenopyrite /5, 17 chalcopyrite...(Yugoslavia), some mines on Mount Amiata, Tuscany (Italy), and Almadén (Spain). In the United States it is... Filiform silver: Nicola Secci, Sarrabus, Sardinia (Italy) endritic copper rmation. Houghton fichigan)...covered with calcite. Casteltermini, Agrigento (Italy) look more different. Theirs is the most notable | | | Book | | Translation © Orbis Publishing Limited 1972 Printed in Italy by IGDA, Novara SBN O 85613 0001 For many years...chabazite 126, 127 chalcanthite 59 chalcedony 3 I chalcocite 8, 8 chalcolite 74 chalcopyrite 10, 11 chaJcotrichite...59 zippeite 62 zircon 77, 78, 78 zoisite 88 THE MINE LKINGDOM All physical bodies in Nature can be...or slightly rotated Vitreous. Like glass 3 THE MINE Class I: native ·elements Chemical elernents found...(Yugoslavia), son1e n1ines on Mount Amiata, Tuscany (Italy), and Almaden (Spain). In the United States it is |  | Gu, X. X., Tang, J. X., Wang, C. S., Chen, J. P., He, B. B. (2003) Himalayan magmatism and porphyry copper-molybdenum mineralization in the Yulong ore belt, East Tibet. Mineralogy and Petrology, 78 (1) 1-20 doi:10.1007/s00710-002-0203-6 | Journal (article/letter/editorial) | | main ore mineral assemblage comprises pyrite, chalcocite and covellite. These occurr within microfractures...observed only as sparse relics. The presence of chalcocite and covellite replacing chalcopyrite in the primary...(generally 2±12% Cu), and ®nally an enrichment zone of chalcocite covellite digneite (4±10% Cu). A ¯uid inclusion...presence of hematite malachite covellite chalcocite delafossite native copper, are poorly developed...Ghezzo C, Stefanini B (1992) The Calabona intrusive complex (Sardinia, Italy): evidence for a porphyry copper |  | | Book | | Geografico De Agostini, Novara 1967 Printed in Italy by IGDA, Novara SBN 0 85613 108 3 Crystallography...danburite, topaz, olivine, cordierite, enargite, chalcocite, bournonite, hemimorphite, and aurichalcite....garnet known as hessonite . Val d’Ala, Piedmont, Italy (4 mm). The rhombic-shaped face in the centre is...Cubic system. Triglyphic pyrite, from Traversella, Italy (30 mm). The corner of the crystal is interrupted...form. 17 Cubic system. Pyrite from Grosseto, Italy (10 mm). The pentagona l dodecahedral form ofthis |  | | Journal (issue) | | 71 An Occurrence of Djurleite at West Caradon Mine, Cornwall I.A. Lawrence 81 NOTE Cinnabar from...to 1'. Pieces 2'x 2' to 4'x 3' from £5. FLORENCE MINE. CUMBRIA, Botryoidal Hematite, plus some pieces...waste rock , obtained by digging into the overgrown mine dumps on the flat ground behind the ruined Richmont...MONT / ... ," CASTLE ~adit ,', ," overgrown mine workings and dumps ," 100m FIGURE 2. Sketch map...associated with smithsonite-bearing veins. Near the mine entrance the major vein attains a maximum thickness |  | | Book | | times, and there is evidence of at least one flint mine dating from this period. Finely worked and polished...place, forming secondary enriched deposits of chalcocite and sometimes of argentite. The 49 14 Section...octahedron. Elba, Italy. Below center Combined octahedral and pyritohedral faces. Elba, Italy. Below right...largest diamond ever found was the Cullinan (Premier mine, 1905), of 3,106 et., or 621.2 grams; from it were...time. Very few pipes are worth working. The Premier mine produces 1 million carats a year. Alluvial deposits: |  | | Book (volume) | | Spain by F. Vazquez Guzman Portugal by D. Thadeu Italy by P. Zuffardi European part of the U.S.S.R. by...Southwest Europe embraces France, Spain, Portugal and Italy. Each volume has an introductory chapter of the...Cordillera Pyreneo-Proven!yal chain Corsica and Sardinia . Mineralization in relation to tectonic evolution...Elisa and Dorinda Barruecopardo Golpejas or Bellita mine Morille-Martinamor El Cubito El Trasqui16n. Santa...Baixo Tejo and Sado Basins Silica sand deposits Italy by P. Zuffardi Introduction Geological setting Stratigraphy |  | | Book | | museum quality but many minerals can be found on mine dumps or can be purchased or traded. After introducing...over its beer: to go underground in a non-working mine is sheer folly unless you are accompanied by someone...(preferably several people) who really knows the mine. Before venturing into the field serious collectors...really is a matter of life or death when you are in a mine - only a plan will show where water on the floor...even on you. If you are recovering specimens from a mine (few collectors can or should do this) watch the |  | | Book | | mineral pigments. LEFT: Malachite, Bwana M’Kubwa Mine, Ndola, Copperbelt, Zambia * 22 x 26 x 16 cm 22...Namibia * 20 x 18 x 14 cm Bladed stibnite, Ichinokawa Mine, Saijo, Shikoku, Japan * 10 x 1 x 1 om Acicular...Brazil * 5 x 3 x 0.6 cm Platy muscovite, José Pinto Mine, Jaguaracu, Minas Gerais, Brazil * 12 x 19 x 6 cm...Malawi * 10 x 10 x 7 cm Calcite, San Sebastian Mine, Charcas, San Luis Potosi, Mexico * 10 x 8 x 6.5...divided by the weight of an Graphite, Black Donald Mine, Renfrew County, Ontario, Canada * 14 x 11 x 10 |  | | Book | | Right: This silver specimen from Seed. Sarrabus. Sardinia, is called filiform from its threadlike appearance...veins and beds in association with chalcopyrite, chalcocite, cuprite, mala¬ chite and azurite. It often occurs...Keweenaw area of north Michigan; at the Copper Queen mine, Bisbee, Arizona and at Georgetown, New Mexico....appraisal. Many Right: Native mercury from Lucca. Italy. This form is extremely rare as mercury is normally...States, in California and Texas; and in Spain and Italy. Treatment. Occurs naturally in such small drops |  | | Book (edition) | | sample of scheelite, coming from Traversella (Turin, Italy), in light natural (above) and exposed Other...that a collector in the field should visit are mine dumps and quarry rubble heaps, where there will...small deposits are found near Pisa and Florence (Italy). Uses Native copper rarely occurs in large enough... lb) was mined. How- been from the Guanajuato mine (Mexico), about 500 billion kilos (460,000,000 tons)...day. Found in southern Europe on the island of Sardinia. Uses An excellent ore of the metal silver, but |  | Santana, Miriela María Ulloa, Moura, Márcia Abrahão, Olivo, Gema R., Botelho, Nilson Francisquini, Kyser, T. Kurtis, Bühn, Bernhard (2011) The La Unión Au ± Cu prospect, Camagüey District, Cuba: fluid inclusion and stable isotope evidence for ore-forming processes. Mineralium Deposita, 46 (1) 91-104 doi:10.1007/s00126-010-0313-8 | Journal (article/letter/editorial) | | sphalerite, and late to supergene covellite and chalcocite. Calcite is found in early veinlet fillings,...Hydrothermal evolution in the Calabona Porphyry Copper System (Sardinia, Italy): the path to an uneconomic |  | | Book | | is found Include Almaden (Spain), Monte Amlata (Italy), ldrija (Slovenia), Moschellandsberg (Germany)...(Peru). Almaden Is the oldest and largest mercury mine In the world. Hg Colour: t in-white Lustre; opacity:...Brunswick (Canada), Kern County (California, USA), Sardinia (Italy) and Sarawak (Borneo). Sb Colour: light grey...Russia, South Korea, Mexico, the Czech RepubUc and Italy. C Colour: black Lustre; opacity: dull metallic;...Crystal system: orthorhombic 26 SULPHID ES Chalcocite C halcocite occurs In two distinct forms, forming | | | Book | | is found Include Almaden (Spain), Monte Amlata (Italy), ldrija (Slovenia), Moschellandsberg (Germany)...(Peru). Almaden Is the oldest and largest mercury mine In the world. Hg Colour: t in-white Lustre; opacity:...Brunswick (Canada), Kern County (California, USA), Sardinia (Italy) and Sarawak (Borneo). Sb Colour: light grey...Russia, South Korea, Mexico, the Czech RepubUc and Italy. C Colour: black Lustre; opacity: dull metall...Crystal system: orthorhombic 26 SULPHID ES Chalcocite C103•c halcocite occurs In two distinct forms |
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