 | | Journal (article/letter/editorial) | | June-July,1997 No. 4 Oligocene GoldQuartzVeinsat Brusson, NW Alps: Sr Isotopes Tracethe Sourceof Ore-Bearing...tracethe sourceof the ore-bearing fluidat the Brusson loe'ality andto testcurrentgeneticmodels,130RbSr...ruleoutthreeof thepreviously proposed sources for the Brusson fluids:(1) metamorphic devolatilization of paragneisses...syenogranitic intrusions thatcropout 18 km southeast of Brusson havesimilarSrā¢,it,.ā¢l valuesandarecoevalwiththe...fluidsin the Oligoeene gold-bearing quartzveinsat Brusson, 0361-0128/97/1925/389-1756.00 389 390 PETTKE |  | | Journal (article/letter/editorial) | | associated with the Monte Rosa gold district, NW Alps, Italy P. Lattanzi Dipartimento di Scienzedella Terra,...di Firenze, via G. La Pira 4, 1-50121 Firenze, Italy Received: December 11, 1989/Accepted: July 17, 1990...scheelite, k-spar, chlorite, sericite, garnet, rutile, graphite, tourmaline, amphibole, and apatite. Gold (and/or...Rosa Unit; Camughera-Moncucco zone; Arceza- Brusson window; Sesia- Lanzo zone; Biella intrusion (Tertiary);...Sesia; 5 - 7 - Valle Anzasca; 8 - Val Bianca (Cani mine); 9 Valle Antrona; 1 0 - Vogogna; liVal Toppa; 1 |  | | Journal (article/letter/editorial) | | Post-metamorphic gold-quartz veins from N.W. Italy: the composition and origin of the ore fluid B. W...six vein samples from gold-quartz veins in the Brusson district demonstrates that their solute chemistry...gold, quartz, fluid chemistry, fluid inclusions, Italy. Introduction MANY orogenic belts exhibit mesothermal...Monte Rosa district in the northwestern Alps of Italy. The gold--quartz veins of this region, and their...here all come from Val d'Ayas, in the vicinity of Brusson, where individual veins crosscut a wide range of |  | | Journal (article/letter/editorial) | | Austria (in the Tauern window) and in northern Italy. The veins formed in the latter stages of uplift...sampled from B6ckstein, Austria, and Valle Anzasca, Italy have a wide variety of compositions, ranging from...Monte Rosa area in the Pennine nappes of northern Italy, and the B6ckstein veins in the Tauernfenster of...microprobe (EDS system, 20 kV). Valle Anzasca, N W Italy The Monte Rosa massif is made up of a stack of Pennine...2. Sportsgastein 3. Bockhartsee Valle Anzasca, Italy 4. Pestarena 5. Quarrazza 6. Borca - - 32 near-homogenization |  | | | | magnetite ore districts of the southern Aosta Valley (Western Alps, Italy): a mineralogical study of metasomatized...Torino, Italy Dipartimento di Scienze della Terra, UniversitaĢ degli Studi di Milano, Italy CNR-Istituto...Ambientali, Milano, Italy Dipartimento di Geoscienze, UniversitaĢ degli Studi di Padova, Italy [Received 23...September 2009] ABSTR ACT In the southern Aosta Valley (Italian Western Alps), several massive magnetite...Piemonte Zone. Introduction IN the southern Aosta Valley, a great number of magnetite ore bodies occur |  | | Journal (article/letter/editorial) | | metamorphism, including illite crystallinity, graphite thermometry, stability of mineral assemblages...around 1,580ā1,600 cm-1, corresponding to the ideal graphite lattice vibration, and a composite defect band...several defect bands characteristic for disordered graphite, at frequencies between 1,100 and 1,800 cm-1....(Aoya et al. 2010; Beyssac et al. 2002). Because graphite defect bands are dispersive, their positions and...veins Quartz-gold post-metamorphic veins, Brusson district, NW Italy (Yardley et al. 1993) Pyrenean metamorphic |  | | Journal (article/letter/editorial) | | from hydrothermal veins at the Fenilia gold mine, Brusson, NW Italian Alps, as described by Diamond (1990;...separated from two larger, outer salt sleeves by a graphite furnace stabilized by two soft-fired, pyrophyllite...delineating entrapment conditions of all inclusions from Brusson sample locality is taken from Diamond (1990). Extrapolation...paragraphs, in order to compare the behaviour of the Brusson quartz samples with previous experimental studies...natural N2āCO2āH2Oā NaCl inclusions in quartz from Brusson behave in accordance with previous studies. Changes |  | | Journal (article/letter/editorial) | | ļ¬uids in the crystalline Gran Paradiso Massif (Orco Valley, north-western Italian Alps): tectonic and geochemical...di Torino, via Valperga Caluso 35, 10125 Torino, Italy b Dipartimento di Scienze della Terra, UniversitaĢ...Ferrata 1, 27100 Pavia, Italy c SEA Consulting s.r.l., via Cernaia 27, 10121 Torino, Italy Received 7 October...handling by H. Armannsson Abstract In the Orco Valley, inside the Gran Paradiso Massif, 3 main fault... In 1999, AEM Torino S.p.A., owner of the Orco Valley hydropower plants (north-western Italian Alps) |  | | Journal (article/letter/editorial) | | by alternative methods for P-T chlorite-quartz-graphite-ankerite-ilmenite-rutilein phyllites and (3) ...inclusions in the āgashā veins quartz veins at Brusson, Val dāAyas, northwest Italian Alps. subsequent...Untertagekartierung der Hutti-Mine und Kartierung des Tagebaus der Ajjanahalli-Mine in Sudindien (Diplomkartierung)...in a first order shear zone: The Ajjanahalli gold mine (Dharwar Craton, South India). Transactions of the...mineralization in the epigenetic, BIF-hosted Ajjanahalli gold mine (Dharwar Craton, India). Berichte der Deutschen |  | Boiron, Marie-Christine, Cathelineau, Michel, Banks, David A, Fourcade, Serge, Vallance, Jean (2003) Mixing of metamorphic and surficial fluids during the uplift of the Hercynian upper crust: consequences for gold deposition. Chemical Geology, 194 (1) 119-141 doi:10.1016/s0009-2541(02)00274-7 | Journal (article/letter/editorial) | | ratios rather typical of fluids equilibrated with graphite, and moderate to medium chlorinities with a high...is an important gold province with the Salsigne mine still active and numerous gold showings (120 tons...metasediments, often containing graphite. In some instances, graphite is a major rock component (mostly...H2O-rich fluids, locally enriched in CH4 near graphite-rich wall rocks, which are generally followed...compositions typical of metamorphic environments where graphite is present. They are mostly dominated by CO2 but |  | | Journal (article/letter/editorial) | | Press. ON THE NATURAL OCCURRENCE OF SPHERICAL GRAPHITE. J. A. Janczuk, Department of Physics and the...49931. One usually imagines fine specimens of graphite as having well-formed hexagonal crystals, either...prized because the ease with which crystals of graphite can be deformed more often yields damaged specimens...interesting, but little studied, morphology of natural graphite is that of spheres, occumng anywhere from under...(A) (B) Figure Z. (A) Cross section of a 1.6cm graphite sphere from Sussex County, New Jersey, showing |  | | Journal (article/letter/editorial) | | groundwaters from south-central Nevada and Death Valley, California K. H. Johannesson, K. J. Stetzenbaeh...Isotope systematics in vein gold from Brusson, Val dāAyas (NW Italy): 1. Pb/Pb evidence for a Plemonte metaophiolite...lOl(E3), 1996, pp 7543-7554. Mineralogy of a unique graphite-containing fragment in the Krymka cbondrite (LL3) |  | | Journal (issue) | | Articles Famous mineral localities: the Taewha mine, K orea...........................................COVER: WULFENITE with mimetitefrom the San Francisco mine near Magdalena, Sonora, Mexico. The large crystal...Alfredo Ferri, / Sassi de Alfredo Ferri (Milan, Italy) Chris and Agatha Galas, Galas Minerals (Delhi,...Himalaya mine, Mesa Grande, California Tourmaline Queen mine, Pala, California Pala Chief mine, Pala, California...Ledge mine, Washington, California Benitoite Gem mine, San Benito Co., California U.S. Borax mine, Boron |  | | Journal (article/letter/editorial) | | significant source of atmospheric CO2. The Marsyandi Valley exposes a complete section of high-grade metasedimentary...lowtemperature hydrothermal mounds in the rift valley of the Mohns Ridge (71Āŗ18' N, 05Āŗ47' W), have been...Tertiary-Quaternary tholeiite basalt province of the Skagafjƶrdur valley system in northern Iceland, have been used to identify...waters emerging on the east side of the Skagafjƶrdur Valley indicate that they originated as precipitation...falling on the high mountains on this side of the valley. These waters generally do not contain detectable |  | | Journal (article/letter/editorial) | | throughout the geologic record. Fluid buffered by graphite at 300 Ā°C to 500 Ā°C could have d13C 592 values...source exchange with graphite or mixed with CO2 resulting from oxidation of graphite. However, mass balance...calculations indicate that rather large amounts of graphite are needed to produce d13C values between )1 and...deep seated source. Isotopic equilibration of graphite with carbon in CO2 is not considered likely, due...comparatively high measured d13C values, and the lack of graphite horizons within the rock assemblage hosting the |  | | Report (chapter) | | gold mine. Gold anomalies in drillcores are identified updip and downdip from the current mine workings...lower. The comprehensive gold assay data from the mine, which are integrated with structural observations...constrain the 3D geometry of the deposit and assess the mine-scale geochemical, lithological and structural controls...et al. 2016). Nalunaq Mountain, in the Kirkespir valley of the Nanortalik Peninsula, an area noted for...Kaltoft et al. 2000; Steenfelt 2000). The Kirkespir valley consists of meta-psammite material, lithologies |  | | Journal (article/letter/editorial) | | Torino, Italy CNR, Istituto di Geoscienze e Georisorse, Via Valperga Caluso 35, 10125 Torino, Italy a r... In several exposures, such as in the lower Aosta Valley, the leucocratic layers are demonstrably orthogneisses...contrast, in several other locations, such as the Orco Valley and the southern Sesia Zone, the Gneiss Minuti...metagranitoids (Compagnoni and Maffeo, 1973). In the Aosta Valley section, the GM rocks contain omphacite but...upon the Piemonte Zone, to the north of the Aosta Valley (Fig. 1; BallĆØvre et al., 1986). It is traditionally |  | | Book (volume) | | ITALIAN MOUNTAIN GEOLOGY ā PARTS NORTHERN 1 AND [ITALY II AND TUSCANY BY C. S. DU RICHE PRELLER, M...el ITALIAN MOUNTAIN PaRts NORTHERN I anp ITALY GEOLOGY. II. AND TUSCANY. OTHER GEOLOGICAL...(The Moraine Walls and Lake Basins of Northern Italy. The Piedmontese Alps, Ligurian Apennines, Carrara...idem. The Ancient Sea and Lake Basins of Central Italy : idem. Italian Mountain Geology, Part II]. Wheldon...Sicily.) 1924. The Glacial Period in the Upper Indus Valley and Kashmir. Journ. R. Sc. Geogr. Soc. * Review |  | | Book | | Guastoni; Roberto Appiani. Originally published: Italy : Mondadori, 2003. [256] p. : col. photos. ; cm...CAPTIONS Page 1: Cuprite crystals from the Ray mine, Arizona Pages 2-3: Liroconite from PERFECT CLEAVAGE...from the Susa Valley, Piedmont, Italy Pages 8-9: Beryl from the Codera Valley, Lombardy, Italy Pages 42-43:...Pages 50-51: Tetrahedrite and realgar from the Binn Valley, Switzerland Pages 70-71: Fluorite crystals from...Mount Bregaceto, Liguria, Italy Pages 104-105: Azurite crystals from Sardinia, Italy Pages 118-119: Boracite |  | | Journal (issue) | | Photo on First Page Titanite. 5 x4.5 cm. Rudnaya mine, Saranovskoye deposit, Perm' region, Urals, Russia...bene eben ing 65 2. Johan Kjellman Gold: Voitsky Mine, Olonets, South Karelia, Russia .. ... . .. .. 72...Eāmail: minerals@obodda.com www.obodda.com WENDEL MINE Rees ste See Tucson us ā SainteāMarie ā 0...(3) serpentinite; M) (4) ganite schist: [] (5) mine workings, (6) striking and dipping of veins. Pegmatites...Mohs scale, e.g., from ā10ā in diamond to ā1ā in graphite? Diamond is an indicator of unusual mineral formation |  | Faleiros, Angela Meira, Campanha, Ginaldo Ademar da Cruz, Faleiros, Frederico Meira, Bello, Rosa Maria da Silveira (2014) Fluid regimes, fault-valve behavior and formation of gold-quartz veins ā The Morro do Ouro Mine, Ribeira Belt, Brazil. Ore Geology Reviews, 56. 442-456 doi:10.1016/j.oregeorev.2013.05.002 | Journal (article/letter/editorial) | | formation of gold-quartz veins ā The Morro do Ouro Mine, Ribeira Belt, Brazil Angela Meira Faleiros a, b...deposits Fluid regimes Fluid inclusions Morro do Ouro mine a b s t r a c t Fluid inclusion studies, petrographic...Neoproterozoic auriferous veins from the Morro do Ouro mine, Ribeira Belt, southeastern Brazil, are presented...deposit. The vein-type Au mineralization at the mine is restricted to structurally controlled domains...mineral deposits. In this context, the Morro do Ouro mine area is the most important and the only gold deposit |  | | Journal (issue) | | M11se11111 ofVic10ria Associate Editors The Daydream Mine, Silverton, N.S.W. John D. Leach .................maximum of 120 m between the hill tops and the valley floors. In general, the valleys form broad flat...1 .2 m deep) at the southern end. GROSMONT MICA MINE Prospectors first opened this 2-4 m thick pegmatite...of 1 % lithiwn ore (Hunter, 1993). TANTALITE HILL MINE In 1909, Hugh Fraser discovered detrital fragments...that are common in Stewart Lithia mine, Pala, California; Brown Derby Mine, Ohio City, Colorado and the Black |  | | Journal (article/letter/editorial) | | predict methaneāwater mixtures in the presence of graphite at moderate oxygen fugacities in anchimetamorphic-to-low-grade...composition of a mixed-volatile ļ¬uid in equilibrium with graphite, buffered by the reaction among Ī±-quartz, magnetite...and water (Bakker and Jansen, 1991, 1994), and graphite re-precipitation on cooling (Bergman and Dubessy...limit of the methane stability in equilibrium with graphite at moderate oxygen fugacities (Figs. 1, 7). At...stability limit of methane in equilibrium with graphite (Tarantola et al., 2007). At higher temperatures |  | | Journal (article/letter/editorial) | | then looked at gold from Zwartkoppie Reef at Sheba Mine (Gay, 1964) and came to the M.A.H. Altigani et...solid than spot analysis. 3. Results the Sheba Mine four samples were collected from the Zwartkoppie...Drummond Reef, and Commitment Reef. From Fairview Mine, 12 samples were collected from the Commitment Main...Complex (MRC). The four samples from the New Consort Mine came from the Consort Contact Reef. 3.1. Samples...and elemental analysis. From 3.2.1. Sheba Mine At Sheba Mine three stages of ore mineralisation were identiļ¬ed |  | | Journal (article/letter/editorial) | | rocks, muscoviteāchlorite schist, black shale, graphite schist, and cordierite schist (Fig. 2b). The orebodies...associate ore mineralization at the Bavanat open pit mine gangue minerals are predominately quartz, muscovite...with metamorphic rocks containing carbonaceous (Ā±graphite) material around the fractures (Cox et al. 1995;...with metamorphic rocks containing carbonaceous (Ā±graphite) material around the fractures. (4) The age of...turbiditeāhosted gold quartz vein deposits, wattle gully mine, Central Victoria, Australia. Econ Geol 90:1722ā1746 |
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