 | | Journal (article/letter/editorial) | | within numerous N - S elongated ca 2080 Ma plutons. Quartz c-axis analysis within the granites shows that...Keywords: Brazil; Greenstone belts; Paleoproterozoic ; Quartz fabrics; Strain; Syntectonic granite * Corresponding...Brazil) using structural and kinematic features, quartz ( c ) axis fabrics, and finite strain. The Paleoproterozoic...(Fig. lb). In the northern domain, the Ambrdsio, Pedra Alta and Polo Grande plutons exhibit a N-S elongate...as pluton Ambr6sio pluton M a r i a Preta Pedra Alta pluton G o l d mines :¢,'® %'® . ,, , ,, |  | | Journal (article/letter/editorial) | | southern Brazil. The examined interval comprises the Pedra Alta sandstone and associated deposits, which are...sediment gravity-flow deposits recorded in the Pedra Alta sandstone, an informal sand-rich unit of the...Depicting the stratigraphic architecture of the Pedra Alta sandstone is also significant for hydrocarbon...sequences resting on erosional unconformities. The Pedra Alta sandstone, the object of the present study, crops...regional correlations and surface mapping, the Pedra Alta sandstone can be placed in the middle part of |  | Davison, Ian, Batista Guimarães Teixeira, João, Da Glória Da Silva, Maria, Barretto Da Rocha Neto, Manoel, Martins Vieira Matos, Fernando (1988) The Rio Itapicuru greenstone belt, Bahia, Brazil: Structure and stratigraphical outline. Precambrian Research, 42 (1) 1-17 doi:10.1016/0301-9268(88)90007-1 | Journal (article/letter/editorial) | | cm in diameter) filled with calcite, albite and quartz. This texture is interpreted as resulting from...text). END I-/18 • 12 - I S 15 ~LE 2I n PEDRA ~ "ALTA+ + -I .DOME+ + + + + + ,.+ + + -I Fig...sp -- serpentinite; go -- gondite (spessartine + quartz ); js -- jaspilite. developing basin had a constant...porphyritic with hornblende, plagioclase and, rarely, quartz phenocrysts; the matrix consists of finely saussuritised...saussuritised plagioclase, chlorite and quartz. Alteration products are mainly epidote, sericite and albite |  | | Book | | France acquired his remarkable collection of giant quartz crystals, exhibited in the National Museum of Natural...minerals. Ilia Deleff PHENOMENAL CRYSTALS GIANT QUARTZ CRYSTALS UNIQUE MINERALS IN WORLD MUSEUMS GEM...Delev Ilia Deleff Phenomenal Crystals GIANT QUARTZ CRYSTALS UNIQUE MINERALS IN WORLD MUSEUMS GEM...NATIONAL MUSEUM IN SOFIA 66 OTHER COLLECTIONS OF MINE IN BULGARIA 71 COLLECTIONS IN OTHER CITIES AROUND...74 95 99 101 TOURMALINE SPODUMENE 102 104 QUARTZ AND ITS VARIETIES 105 REFERENCES AND BIBLIOGRAPHY |  | | Catalog/List | | crystal section. ¼"$2. 50. ANDORITE San Jose mine, Oruro, Bolivia. Select rich gray metallic mass...11 $2. 00, $2. 50 and $3. 50. ARGENTITE Ra.yas mine, Guanajuato, Mexico. Choice dull gray modified cubic...¾x%"to ¾x½11 $3. 50 and $5. 00. ARSENOLITE White Caps mine, Manhattan, Nye Co., Nevada. Select lustrous snow-white...4X¼" $1. 50, $2. 00 and $2. 50. i BOLEITE Amelia mine, Boleo, Baja California, Mexico. Choice bright blue...CASSITERITE in QUARTZ Llallagua, Bolivia Select elongated transparent terminated quartz crystal with small |  | | Journal (issue) | | will receive as part of your collection. Smoky quartz AUSTRALIA Dear Reader, MINERALS Foshagite, Ludlamite...specific gravity (SG) of smoky quartz is exactly the same as that of clear quartz—both weigh 2.65 times more... if present, probably make the weight of smoky quartz different from that of transparent forms of the...AS FIVE ADULT HUMANS The brown colour of smoky quartz is fairly easy to imitate by irradiation techniques—this...formed by natural radiation within the Earth. Smoky quartz is sometimes known alternatively as cairngorm, |  | da Silva, Maria da Glória, Silva Coelho, Carlos Eduardo, Teixeira, João Batista Guimarães, da Silva, Fernando César Alves, Silva, Roberto Albuquerque, de Souza, Jorge André Braz (2001) The Rio Itapicuru greenstone belt, Bahia, Brazil: geologic evolution and review of gold mineralization. Mineralium Deposita, 36 (3) 345-357 doi:10.1007/s001260100173 | Journal (article/letter/editorial) | | includes small subvolcanic stocks of diorite to quartz±porphyry composition. 346 Fig. 1 Regional geological...the Rio Itapicuru greenstone belt. Source: CVRD mine sta (unpublished company data) 347 3. Volcaniclastic...subvolcanic stocks and dikes of porphyritic diorite and quartz diorite composition, which intruded both the supracrustal...strain occurring at the eastern border of the Pedra Alta and PocËo Grande domes. The zone of highest strain...sericite in alteration haloes surrounding gold-bearing quartz veins has 40Ar/39Ar cooling ages of 2,083 and 2 |  | | Journal (article/letter/editorial) | | 2006). The other domes, such as Salgadália and Pedra Alta (see Fig. 1B), have not been 130 studied in...circular structures of the 178 Alto Alegre and Pedra Vermelha domes; (ii) the southern and southeastern...represented by the Alto Alegre and Pedra Vermelha 211 domes. The Pedra Vermelha dome has a granitic-migmatitic...foliation dipping at high angles E and W. The Lx2 237 quartz stretching lineation plunges shallowly to SSE....domain III and it is marked 243 by stretched quartz plunging shallowly northwards or southwards. Kinematic |  | | Book | | The auriferous claims 148 The gold mine of Morro Velho 153 The Mine of Passagem 155 The/old rush in P'ianc6...topaz 385 T he imperial topaz of Ouro Preto 393 The Mine of Capao do Lana 397 The imperial topaz of Antonio...the pyralspite series 411 essartine 414 ~ he Mine of Pedra Bonita 416 Garnets of the ugrandite series 418...619 The large quartz family 624 Rock crystal 630 Citrine 633 Smoky quartz 636 Rose quartz 641 Exceptional...Exceptional amethysts 653 Quartz with inclusions 656 Rutilated quartz 661 The chalcedony 665 The fascinating |  | | Book | | On a spectacular find of crocoite in the Adelaide mine, Dundas, Tasmania (by A. H. Chapman) 3:111-113 ADOLFSSON...AJO Famous mineral localities: the New Cornelia mine, Ajo, Arizona (by W. J. Thomas & R. B. Gibbs) 14:283-298...ALLEN, GEORGE B. --and W. Hunt: The Tonopah-Belmont mine, Maricopa County, Arizona 19:139-144 ALLGOOD, GENNE...Allgood, C. Williams: Ramsdellite from the Mistake mine [Arizona] 14:333-335 ALLGOOD, ROBERT W. -with G...the Mistake mine [Arizona] 14:333-335 ALMA Famous mineral localities: the Home Sweet Home mine, [near Alma |  | | Report (issue) | | giant beryl crystal at Senhora da Assun9iio in Portugal uncommonly seen in beryl and is usually due to...crystal weighed 455 kilograms. 2m: The Queen Anne mine in Zimbabwe has produced crystals up to 2 meters...meters wide have been found at Senhora da Assun�io, Portugal. Pegmatites at Mahajamba, Madagascar have yielded...phosphate type pegmatites, beryl is associated with quartz, microcline, albite, muscovite, biotite, ferrocolumbite...Alpine and hydrothermal veins, it is found with quartz and feldspar. In topaz rhyolites where red beryl |  | | Journal (issue) | | lazuli from Asia Minor, as well as agates, rose quartz, emeralds, and amethyst were popular materials...The necessary silica is supplied in the form of quartz (Si02), which floats to the surface of the molten...because it has a lower density than the flux. As the quartz slowly dissolves at the top of the flux, the nutrients...liquid at about the same rate as a rock crystal quartz indicator. Thus, the specificgravity of these Russian...and tor her constant support, The many miners and mine owners who were so instrumentalin providing information |  | | Journal (issue) | | Sabelli & G. Brizzi Osarizawaite from the Silver Hill mine, Arizona ........................ 311 by C. S. Stolberg...CREEDITE crystal, 3.7 cm, on smoky quartz from the Aktschatau tungsten mine, central Kazakhstan, U.S.S.R....The specimen was collected in 1982. The Aktschatau mine is among the most im portant specimen-producing...of Golden State Mint, Mira Loma, Cali- RED CLOUD MINE SITE, YU M A COUNTY. ARIZONA WULFENITE, Red Ckud...of the mine. The first in the series is a Red Cloud mine wulfenite backed by a view of the mine site; |  | | Book | | Natural, Cultured and Imitation Alexander E. Fam Quartz Michael O'Donoghue Also availablefrom Butterworth-Heinemann...186 Pakistan 186 People's Republic of China 188 Portugal 189 Republic of South Africa 189 Saudi Arabia...copper alloy containing about 20% tin. Topaz and quartz are common associates of tin ore, so that early...been colourless, and undoubtedly was confused with quartz and other colourless minerals until fairly recent...most probably referred to colourless transparent quartz (Caley and Richards, 1956; Ball, 1950). However |  | | Journal (issue) | | Moore Phosphate minerals from the Leveaniemi iron mine, Svappavaara, Sweden .............................Hollabaugh Laueite from Hagendorf-Siid andthe Palermo mine ................. 363 by L. C. Pitman New data...on the cause of smoky and amethystine color in quartz .................................................image of a crack hidden in the back (roof) of a mine adit (from A. P. Annan etal. (1988) Radar sounding...35565, Tucson, AZ 85740. BLUE QUARTZ A synthetically colored blue quartz (trade named “Aqua Aura”) was |  | | Journal (issue) | | 2009 Articles Famous mineral localities: The Sapo mine, Ferruginha district, Conselheiro Pena, Minas Gerais...Menezes Famous mineral localities: The Lac d’Amiante mine, Black Lake, Thetford Mines, Québec . . . . ...July–August, 2009 Famous Mineral Localities: The Sapo Mine Ferruginha District, Conselheiro Pena Minas Gerais...30410-080 Email: lmenezesminerals@uol.com.br The Sapo mine exploits a thick sub-horizontal pegmatite that was...discovered in 1985 and has produced large pockets of quartz crystals, several important pockets of tourmaline |  | | Report (issue) | | elbaite crystals with lepidolite from the Golconda Mine in Minas Gerais, Brazil by Eberhard Equit, 1993...circa 1910 view of the old mine portal on the north side of the Himalaya Mine in San Diego County, CA....a peculiar quartz-diopside rock type that consists of ab solutely white diopside, quartz and calcite...An 11 cm tall elbaite group from the Pederneira Mine in Minas Gerais, Brazil. The bottom of the group...phengite, tainiolite, vanadium-bearing muscovite, quartz and dolomite from the Onega depression, Central |  | | Book | | national jurisdiction of four countries — Brazil, Portugal, Spain, Great Britain — have geological bibliographies...the beaches of Quixaba, Sancho and Carreiro de Pedra. In these cliffs ankaratritic flows, serveral metres...Atalaia embayment. This flow is some 30m thick at Pedra Alta, perhaps the same at Biboca beach, but certainly...occasionally glenmuirites are found, as e.g. near Pedra Alta, where Remedios glenmuirite outcrops occur. At...conduits near the present coast at Carreiro de Pedra Bay. The dips of the tuffs here imply that at the |  | | Book | | Litchfield County, where good crystals were taken from quartz veins in a variety of metamorphic, plutonic and...Litchfield, where a mass of white quartz on a ridge had once been mined for quartz, and large ilmenite masses...ilmenite crystals to 7 .5 cm in matrix of massive quartz from these dumps-adding that, in his judgment,...Springfield show ( 1995: 582). Madawaska [Faraday] mine near Bow Lake, Hastings County. Some of the world's...property of, the old Madawaska uranium mine (called the Faraday mine before 1964). The mineral assemblage |  | | Journal (issue) | | by J. P. Cassedanne & J. Alves Crystallized rose quartz from Alto da Pitora, M inas Gerais, Brazil ......It’s about 18 cm tall, and came from the Eureka mine, Tuolumne County, California. The specimen, now...(Some dealers have used the name “Aldeia do Erne mine,” apparently because Aldeia is the nearest village...there it is a 15-minute hike up a steep trail to the mine. The Mineralogical Record, volume 21, September-October...specimen. Figure 3. Muscovite group with smoky quartz; the large muscovite crystal is about 6 cm across |  | | Journal (issue) | | by J. P. Cassedanne & J. Alves Crystallized rose quartz from Alto da Pitora, M inas Gerais, Brazil ......It’s about 18 cm tall, and came from the Eureka mine, Tuolumne County, California. The specimen, now...(Some dealers have used the name “Aldeia do Erne mine,” apparently because Aldeia is the nearest village...there it is a 15-minute hike up a steep trail to the mine. The Mineralogical Record, volume 21, September-October...specimen. Figure 3. Muscovite group with smoky quartz; the large muscovite crystal is about 6 cm across |
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