 | | Journal (article/letter/editorial) | | EconomicGeology Vol. 84, 1989, pp. 1444-1451 GOLD IN SWITZERLAND FELICEC. JAFFfZ Departmentof Mineralogy,Universityof...Geneva,13, rue desMaraĆchers, 1211 Geneva4, Switzerland Introduction The main purpose of this communicationis...detailnumerous similar occurrences in eastern Switzerland and has discussed in detail their originand...calcareousAlps: Calanda, Grisons The abandonedCalandagold mine was described in the lastcentury(Kenngott,1866)...beginningof the 19th Numeroussmallore depositsoccurin Switzerland, many of which have been mined on a smallscalein |  | Martin, Silvana, Toffolo, Luca, Moroni, Marilena, Montorfano, Carlo, Secco, Luciano, Agnini, Claudia, Nimis, Paolo, Tumiati, Simone (2017) Siderite deposits in northern Italy: Early Permian to Early Triassic hydrothermalism in the Southern Alps. Lithos, 284. 276-295 doi:10.1016/j.lithos.2017.04.002 | Journal (article/letter/editorial) | | of graben basins in the basement (from W to E: Lugano-Varese Basin, Orobic Basin, Val Trompia Basin in...sub-millimetric films and lenses of Fe-carbonate (siderite, ankerite) have been described within black phyllites (e...portion of the Lombardian Alps and include (a) the Costa Ricca high-temperature Bi- RI telluride-bearing...the high-temperature veins of the Regina-Bovegno mine (Brescian Alps). Carbon and oxygen isotope analyses... ACCEPTED MANUSCRIPT 8_3_2017 in basement), and Costa Ricca - Val di Rango (contact aureole with Permian |  | | Journal (article/letter/editorial) | | intensely carbonatized rock (e.g., the giant Morro Velho mine with >450 t of contained gold). Metabasalts host...gold deposits, the giant underground Morro Velho mine produced about 450 t Au, and was mined to a depth...gold production, including the giant Morro Velho mine, is from orebodies hosted by a hydrothermally altered...siderite-rich bands of BIF are laterally replaced by ankerite-rich bands and domains (Ank) that are themselves...containing carbonate minerals (ferroan dolomite  ankerite, siderite, dolomite, rare calcite), quartz, albite |  | | Catalog/List | | 5x2x5/8", ÂŁ8.75 A/4. ADAMITE. Kameriza Central Mine, Laurium, Attica, Greece. A sparkling lime-green... ÂŁ24.00 ADULARIA/CHLORITE. St Gothard, Ticino, Switzerland. A matrix-free penetrant association of A/6...ADULARIA/SPHENE/EPIDOTE/CHLORITE/ALBITE. St Gothard. Ticino, Switzerland. Excellent example of alpine assemblage....3. ANATASE/ADULARIA. Cavagnoli-Glacier, Ticino, Switzerland. A Lustrous, pearly interform of sharp, pseudo-rhombic...5x2x1", ÂŁ10.00 6. ANDRADITE GARNET. Belstone Consols Mine, Sticklepath, Devonshire. A vitreous brownishgreen |  | | Book (volume) | | San Gottardo . . . . . . Cap. XXXVI - 11 Canton Ticino e la Val Mesolcina .... . . . . Cap. XXXVJI - La...bei campioni dell' Alpe Cam polungo, nel Canton Ticino e di qualche dolo mia nelle vicinanze del Sempione...Passo del Como nell'alta Val Bedretto ( Canton Ticino); Monte Nevoso (Schneeberg) in Val Passiria; il...Candoglia e Craveggia nel Piemonte; Claro nel Canton Ticino; Sondalo in Valtellina; Val d ' Ul timo e di Anterselva...nota ai collezionisti e ii Pizzo Forno nel Canton Ticino, ove ii minerale si presenta sotto forma di una |  | Bogossian, Jessica, Hagemann, Steffen G., Rodrigues, Vinicius G., Lobato, Lydia Maria, Roberts, Malcolm (2020) Hydrothermal alteration and mineralization in the Faina greenstone belt: evidence from the Cascavel and SertĂŁo orogenic gold deposits. Ore Geology Reviews, 119. 103293 doi:10.1016/j.oregeorev.2019.103293 | Journal (article/letter/editorial) | | Hydrothermal alteration is characterized by distal quartz-ankerite-chlorite-pyrite±chalcopyrite and proximal quartz-white...crystallization ages of 2490 ± 40 Ma (CorrĂȘa da Costa et al., 2006), and (ii) EW-trending Jurassic/Cretaceous...Orinoco Gold Ltda. was developing an underground mine at the Cascavel deposit and conducted exploration...collected from underground workings in the Cascavel mine. Despite the emphasis on these two deposits, selected...alteration zone (white mica-biotite-quartz-chlorite-ankerite) extends up to 1 m from the V2 veins. The assemblage |  | | Journal (article/letter/editorial) | | Velhas Supergroup. The lithological succession of the mine area comprises, from bottom to top, lower mafic...conditions. Textures observed on microscopic to mine scales indicate that the mineralized CuiabĂĄ BIF...pervasive replacement of Fe-carbonates (sideriteâankerite) by Fe-sulfides. Gold mineralization at CuiabĂĄ...present, the CuiabĂĄ Mine is the major gold producer in the QF and the largest underground mine in Brazil. The...QuadrilĂĄtero FerrĂfero showing the location of the CuiabĂĄ Mine and other BIF-hosted gold deposits with >5 t contained |  | | Journal (article/letter/editorial) | | focuses on the VMS deposits of the BracemacâMcLeod mine, in the Matagami district of the Archean Abitibi...present study is focused on the new BracemacâMcLeod mine, comprising two VMS deposits (Bracemac and McLeod)...sample. Track of laser ablation-ICP-MS shown. c) Ankerite associated with pyrite and quartz (716489 in MC-05-18...and sphalerite. reported from the Mattagami Lake mine (Pan et al., 1994) but are very scarce in the Key...documented by Pan et al. (1994) for the Mattagami Lake mine, it can also form larger aggregates parallel to |  | Gracheva, Maria, Homonnay, ZoltĂĄn, KovĂĄcs, Krisztina, BĂ©res, Kende Attila, Biondi, JoÄo Carlos, Wenchao, Yu, KovĂĄcs Kis, ViktĂłria, Gyollai, IldikĂł, PolgĂĄri, MĂĄrta (2021) Mössbauer characterization of microbially mediated iron and manganese ores of variable geological ages. Ore Geology Reviews, 134. 104124pp. doi:10.1016/j.oregeorev.2021.104124 | Journal (article/letter/editorial) | | cela donite, aegirine, Fe-bearing carbonate like ankerite) (Fe minerals hereafter) are main or basically...mation of siderite and mixed carbonates, like ankerite. Combination of Fe-oxide and segregated silica...3Mg0.1Fe3+1.5Mn3+0.5O4 Carbonates Siderite FeCO3 Ankerite Ca(Fe2+,Mg)(CO3)2 Silicates Aegirine Ca0.75Na0...spectra of the investigated samples from the Urucum mine are dominated by magnetic sextets of octahedrally...1998)), the doublet should rather correspond to ankerite Ca(Fe,Mg)CO3 or other carbonate mineral with Fe |  | | Journal (issue) | | _II materiale proveniente dalla "volata" delle mine viene caricato dalle pale frontati e gettato entro...quarzo, galena, fluorite, anidrite, dolomite, ankerite e calcite in campioni di notevole effetto estetico... arsenopirite, antimonite, calcite, dolomite, ankerite, tetraedrite, boumonite. 6 - Antimonite - Shi...fluorite, sfalerite, galena, tetraedrite, dolomite, ankerite, calcite, pirrotina., arsenopirite, antimonit...dolomite, tetraedrite, pirite, calci- 12 te, ankerite e galena. E uno dei minerali di Campiano piu ricercato |  | | Journal (article/letter/editorial) | | Crystals Dave Shannon of Mesa now has the lease on a mine with molybdenite crystals at Cleator in Yavapai...probable identification was ferroan dolomite or ankeriteâdefinitely not crandallite. I n July of 1988,...quartzite)." New Mexico Lead Mr. Gerry Clark of Costa Mesa, California, had a re markable specimen of...from the Lengenbach quarry at Binntal, Wallis, Switzerland, proved that in this case not the iron content...cu prite crystals has been made at Mashamba West mine, Mashamba in Shaba. Specimens have been found on |  | | Journal (issue) | | by P. M. Adams Atacamite from the New Cornwall mine, Kadina, South Australia .........................COVER: ATACAMITE, 10.5 cm, from the New Cornwall mine, Kadina, South Australia. Collection of (and photo...break to collect minerals at the famous Red Cloud mine. Everyone had fun on the trip, and Graham found...after three semesters to pursue an opportunity to mine placer gold near Quartzsite. He also bought and...made many collecting trips back to the Red Cloud mine in the 1980s and early 1990s. In 1996 he managed |  | | Journal (article/letter/editorial) | | Charlotte quartz vein stockwork, Mt Charlotte gold mine, Kalgoorlie, Australia: time constraints, down-plunge...to a hot (>600 °C) fluid source 2â4 km below the mine workings, and several kilometres above the base...mapping of superimposed structures on the Mt Charlotte mine 22 level is employed to determine relative time...orebody, the vein stockwork yielding 70 % of the total mine production. The structural observations also resolve...quartz vein orebodies and those of the Mt Charlotte mine (MCH) are associated with the Mystery (MYF), Charlotte |  | | Catalog/List | | 94403 U.S.A. Old No. l Headfnme. Whi â key Hlll Mine, Tuohnne County, CaUfomla (râ -,u. .SVâąt- tor cr11âątâąJ...association. Few of the minute crystals you see on mine or quarry dumps or even on cabinet specimens will...dumps or surface float. Mirute crystals seen on a mine dump are a clue but nearly always tao weathered...'hite hairs on feldspar. 784 ADAMITE, Moha\'.1k Mine, San Bernardino County, r.alifornia. Group o f colorless...crystals on matrix. 632 AOOLARIA, Tavetsch, Switzerland. Transparent typical crystals on matrix. 910 |  | | Journal (article/letter/editorial) | | 2000, pp. 1689â1699 Isotope Geochemistry of Ankerite-Bearing Veins Associated with the Coeur dâAlene...University, Pullman, Washington 99164 Abstract Ankerite-bearing veins are common and widespread throughout...ratios for quartz from the calcite-dominant and ankerite-dominant veins overlap and range from 12 to 18...veins give average ratios of 14.5 to 14.7 per mil. Ankerite oxygen and carbon isotope ratios range from 11...16.0 per mil and â6.9 to â2.8 per mil. Quartz-ankerite fractionations lie between 1.1 and 2.9 per mil |  | | Journal (article/letter/editorial) | | Locality/method Cachoeira do OgoĂ fault zone Mina III mine K±Ar Rb±Sr Ar±Ar Rock Metabasalt and several hydro...granodioritic, and granitic intrusions (Kuyumjian and Costa 1999) that outcrop over areas of less than 100 m2...Mina III and Mina Nova mines, the exhausted Pompex mine, and several garimpos situated near the town of...(Fig. 4b). Host rock An exposure in the Mina III mine (Fig. 5) shows that one of the massive sulÂźde lenses...Carbonatization is deÂźned by iron-rich dolomite or ankerite hosted by a high-strain zone that aÂects all mentioned |  | Maitte, Baptiste, Jorand, FrĂ©dĂ©ric P.A., Grgic, Dragan, Abdelmoula, Mustapha, Carteret, CĂ©dric (2015) Remineralization of ferrous carbonate from bioreduction of natural goethite in the Lorraine iron ore (Minette) by Shewanella putrefaciens. Chemical Geology, 412. 48-58 doi:10.1016/j.chemgeo.2015.07.024 | Journal (article/letter/editorial) | | Transmission Mössbauer spectroscopy; SMW, synthetic mine water. â Corresponding author. E-mail addresses:...(i.e. iron ore oxidized by air in the underground mine during ~ 80 years of mining exploitation) and intact...this is believed to be one of the main causes of mine collapses in Lorraine (France). After mining, the...iron ore has been exposed for 70â100 years to the mine atmosphere (i.e., weathered and oxidized iron ore)...out in a synthetic mine water (SMW) similar in composition to that of underground mine water as far as the |  | | Journal (article/letter/editorial) | | EconomicGeology Vol 78, 1985,pp 1144-1205 The Mattagami Lake Mine ArcheanZn-Cu SulfideDeposit,Quebec: Hydrothermal...Geochemistry,80/60, and Mineral Chemistry U. R. COSTA, Programade Pesquisae Pos-Graduaâąt7o em Geopfisica...OntarioN6A 5B7, Canada Abstract The Mattagami Lake mine is an Archean Zn-Cu massivesulfidedepositlocatedin...trondhiemitic composition. The footwallto the MattagamiLake mine isa vitroclastic rhyolitepossessing the assemblage...percent of the rock.Background rhyolitesexternalto the mine plot within the field of rhyolitesin Zr/ TiO2-Nb/Y |  | Ferry, John M., Stubbs, Joanne E., Xu, Huifang, Guan, Yunbin, Eiler, John M. (2015) Ankerite grains with dolomite cores: A diffusion chronometer for low- to medium-grade regionally metamorphosed clastic sediments. American Mineralogist, 100 (11) 2443-2457 doi:10.2138/am-2015-5209 | Journal (article/letter/editorial) | | GEOCHEMICAL TRANSPORT PROCESSES IN THE CRUST AND MANTLE Ankerite grains with dolomite cores: A diffusion chronometer...Pasadena, California 91125, U.S.A. 1 Abstract Ankerite grains with dolomite cores occur in marls, pelites...contacts with ankerite, and have the same crystallographic orientation as ankerite rims. Ankerite grains with...orientation of dolomite and ankerite and the sharpness of the dolomite-ankerite contact are consistent with...with partial replacement of detrital dolomite by ankerite by solution-reprecipitation. Metamorphic biotite |  | | Journal (article/letter/editorial) | | related to Dn + 2 intersect Sn + 1. The Paiol Gold Mine is one of several mineralised zones within metabasic...belts, the Archaean Almas Greenstone Belt (AGB; Costa, 1984), is the concern of the present study. The...al., 1990). Such centres include the Paiol Gold Mine and other small gold deposits (Fig. 2). The metasedimentary...affected by hydrothermal alteration. The Paiol Gold Mine is located approximately 35 km south of Almas (Fig...emplacement of the gold mineralisation at the Paiol Gold Mine and other localities within the CoÌrrego Paiol Formation |  | | Journal (article/letter/editorial) | | larger scalefrom the ore zone to the peripheryof the mine area. The intensityof alterationcanbe monitoredby...area wasthe scene son, 1948). The Kerr-Addison mine lies on the south limb of of the firstgoldrushin...batholiths occur along the peripheryof the synarea and mine is presented first. This study comclinorium, whereas...a major been describedby the geologicstaffof the mine in gold belt that spans'--400 km, from Val d'Or...Catherine Group) + vv /Lake vvvvW (b. Hunter Mine Group) .i:i:âą Komatii tic Group) Vol canics (Wabewada |  | | Report (issue) | | district, 2, As radial clusters near Lippincott mine, Ubehebe McAllister (4) p. 52. SODA AMPHIBOLES...bakerite has been collected from the Stirling Borax mine, Tick Canyon, Pemberton (p.c. '58). This is an unusual...lens as pale brown crystals at the Foster Bluebird mine 3 miles north of the abandoned station of Ogilby...Canyon, near junction with the road to Cerro Gordo mine, McAllister (4) p. 53. Mariposa County: 3, Colorless... Reported as coatings in fractures from the Old Mine ore body, Kinkel et al. (2) p. 89. ARAGONITE Inyo |  | | Journal (issue) | | Continued an page 2 Russia II Fig. 1 Struverite in ankerite, aboufo:s mmlong, Midstate Quarry, Magnet Cove...were not albite but tan ankerite crystals in massive ankerite. Veins of ankerite were described in the...the Magnet Cove Titanium Mine. This may be from a similar one, though I did not see the vein in place. Breaking...the Brewer Mine, Cedartown, GA are chalcosiderite, and crystals from the Coon Creek Mine, Polk County... current owner and operator of the Little Three mine, to inspect his mining activities and at, the same |  | | Journal (article/letter/editorial) | | © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed...deposits. These include the worldclass Serra Grande mine, in the CrixĂĄs greenstone belt (â€7 Moz Au; AngloGold...hydrothermal alteration consists of white mica-quartz-ankerite/siderite ± chlorite assemblages, with minor albite...albite ± K-feldspar and associated quartz ± ankerite/siderite veins. At SertĂŁo, proximal white mica-K...and Zona Superior orebodies of the Serra Grande Mine [95,116]. At the Zona Superior orebody, massive |  | | Journal (article/letter/editorial) | | Donaldson (1984), Lesher & Keays (1984); Thompson mine: Chen et al. (1993), and Fortaleza de Minas: Brenner...from the Internal Report of Serra da ÂFortaleza mine, Votorantim Metals, June 2004). 757 758 the...actinoliteâtremolite. Carbonate in veins, mainly ankerite (5â15%; Fig. 7e), occurs as inclusions in or hosting...showing massive chalcopyrite with inclusions of ankerite, associated or not with magnetite, and siderite...cleavage planes of pentlandite. Symbols: Ank: ankerite, Cbt-Gdt: cobaltite-gersdorffite, Ccp: chalcopyrite |
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