 | Chauvet, Alain, Bailly, Laurent, André, Anne-Sylvie, Monié, Patrick, Cassard, Daniel, Tajada, Fernando Llosa, Vargas, Juan Rosas, Tuduri, Johann (2006) Internal vein texture and vein evolution of the epithermal Shila-Paula district, southern Peru. Mineralium Deposita, 41 (4) 387-410 doi:10.1007/s00126-006-0068-4 | Journal (article/letter/editorial) | | vein evolution of the epithermal Shila-Paula district, southern Peru Received: 28 July 2005 / Accepted:...Springer-Verlag 2006 Abstract The epithermal Shila-Paula Au–Ag district is characterized by numerous veins hosted...volcanic rocks of the Western Cordillera (southern Peru). Field studies of the ore bodies reveal a systematic...adularia–pyrite–galena–sphalerite–chalcopyrite–electrum– Editorial handling: B. Lehmann A. Chauvet . P...C., Luis N. Saenz 447-449, Jesus Maria, Lima 21, Peru J. Tuduri ISTO, CNRS-UMR 6113, University of Orléans |  | | Journal (article/letter/editorial) | | Indonesia) and Nazareño (10 Ma; Cordillera Shila, southern Peru) were studied to investigate processes related...–polybasite-pearceite–tennantite-tetrahedrite–electrum. Minerals of the polybasite-pearceite series,...oxyhydroxides and covellite as boxwork fillings. Primary electrum grains with a composition of about Au0.6Ag0.4...replacing minerals commonly associated with vermicular electrum of a greater fineness (up to Au0.8Ag0.2). The...West Java, Indonesia, and Nazareño, ShilaPaula district, southern Perú, in order to examine the spatial |  | | Journal (article/letter/editorial) | | INTERMEDIATE-SULFIDATION PALLANCATA DEPOSIT, AYACUCHO, PERU Jorge E. GAMARRA-URRUNAGA§ International Minerals...to later open space infill resembles the Shila Paula district (Chauvet et al. 2006). Fluid inclusion petrography... argentite (now acanthite), and Au–Ag alloy (“electrum”). This Ag2S enrichment and Sb2S3 depletion during...pearceite–polybasite, acanthite, uytenbogaardtite, Peru Introduction The Pallancata vein occurs in the...southeast of Lima in the district of Coronel Castañeda, Parinacochas province, Ayacucho department, at |  | | Journal (article/letter/editorial) | | New Zealand. The opaque minerals include pyrite, electrum, acanthite (Ag2S), sphalerite, and galena, which...Uytenbogaardtite and petrovskaite occur with high-fineness electrum. Broken Hills is the only deposit in the Hauraki...minerals include covellite, chalcocite, Au-rich electrum, barite, and a variety of iron oxyhydroxide minerals...between uytenbogaardtite and associated highfineness electrum may be similar in both conditions. Distinguishing...Hauraki goldfield . New Zealand . Epithermal . Electrum . Uytenbogaardtite . Petrovskaite Introduction |  | | Journal (article/letter/editorial) | | of wrench shear zones in the case of Shila gold mines (south Peru); (ii) remobilisation of metal in volcanic-hosted...and fibrous textures from the Hercynian mining district of Tras-os-Montes, Galicia, Spain. Red lines illustrate...Regional-Scale Structures within Volcanic Domains The Shila-Paula district is one of the numerous Au/Ag low sulfidation...sulfidation epithermal one of Southern Peru. It is characterised by numerous veins hosted by the tertiary subaerial...quartz–adularia–pyrite–galena –sphalerite–chalcopyrite–electrum–Mn silicates and carbonates assemblage that fills |  | | Journal (article/letter/editorial) | | “Au-rich electrum” or “highfineness gold” (1000÷700), “electrum” (700÷250), “Ag-rich electrum” or old...of the primary gold. Native silver and Ag-rich electrum (0–250‰) is replaced by acanthite (Comstock and...Bischoff 1995). Uytenbogaardtite in association with electrum has been found in ijolite and nepheline syenites...corrections into the evaluation of sulfur fugacity by electrum-tarnish method developed by Barton and Toulmin...acanthite-electrumuytenbogaardtite and uytenbogaardtite-electrum-petrovskaite. The results obtained in our work |  | | Journal (article/letter/editorial) | | at various scales, from microscopic (individual electrum grains) to mesoscopic (hand specimens), because...abundance, adularia, calcite, johannsenite, and electrum, formed in the earlier episode. Quartz with large...amounts of interstratified smectite/chlorite, electrum, and silver sulfides, such as aguilarite, polybasite...the crustiformbanded vein. The association of electrum with microcrystalline or colloform textures is...microcrystalline quartz containing precious metals (electrum, jalpaite, and mckinstryite) is locally present |  | | Journal (article/letter/editorial) | | The epithermal Au-Ag deposits in the northern province have ages from 14.1 to 10 Ma and formed in an...mine, gold occurs in small grains (1–80 µm) of electrum (49.5–67.0 wt percent Au) with quartz or as inclusions...and adularia, main stage quartz and sulfides ± electrum, and a final amethystine stage (Brathwaite and...colloform quartz with electrum-bearing sulfides to crustiform quartz with electrum-poor sulfides (Brathwaite...(Ca2Mn7Si10 O28 (OH)2•5(H2O)), pyrite, acanthite, and electrum. The general mineral sequence can be subdivided |  | | Journal (article/letter/editorial) | | sulfide veins, followed by two to five stages of electrum-bearing quartz veins. The most voluminous of these...quartz veins with gold and silver occurring as electrum, acanthite, polybasite, pyrargyrite, and associated...Ore mineralogy Electrum ± Ag sulfosalts, chalcopyrite, sphalerite, galena, bornite Electrum ± Ag sulfosalts...sphalerite, bornite Electrum ± Ag sulfosalts, chalcopyrite, sphalerite, galena, bornite Electrum ± Ag sulfosalts...sulfosalts, chalcopyrite, sphalerite, galena, bornite Electrum listed in order of abundance; quartz makes up |  | Cheval-Garabédian, Florent, Faure, Michel, Marcoux, Eric, Gouin, Jérome, Picault, Maxime (2020) The La Bellière gold and antimony district (French Armorican Massif): A two-stage evolution model controlled by Variscan strike-slip tectonic. Ore Geology Reviews, 125. 103681pp. doi:10.1016/j.oregeorev.2020.103681 | Journal (article/letter/editorial) | | Journal Pre-proofs The La Bellière gold and antimony district (French Armorican Massif): a twostage evolution...M. Picault, The La Bellière gold and antimony district (French Armorican Massif): a two-stage evolution...Elsevier B.V. The La Bellière gold and antimony district (French Armorican Massif): a two-stage evolution...florent-cg@hotmail.fr Abstract The La Bellière gold district, in the Ligerian domain of the Armorican Massif...Orogenic gold; Sb mineralization; La Bellière district; Or300 hydrothermal event; Armorican Massif; Structural |  | Tuduri, Johann, Chauvet, Alain, Barbanson, Luc, Bourdier, Jean-Louis, Labriki, Mohamed, Ennaciri, Aomar, Badra, Lakhlifi, Dubois, Michel, Ennaciri-Leloix, Christelle, Sizaret, Stanislas, Maacha, Lhou (2018) The Jbel Saghro Au(–Ag, Cu) and Ag–Hg Metallogenetic Province: Product of a Long-Lived Ediacaran Tectono-Magmatic Evolution in the Moroccan Anti-Atlas. Minerals, 8 (12). 592pp. doi:10.3390/min8120592 | Journal (article/letter/editorial) | | Jbel Saghro Au(–Ag, Cu) and Ag–Hg Metallogenetic Province: Product of a Long-Lived Ediacaran Tectono-Magmatic...as part of a long-lived silicic large igneous province. The area comprises two lithostructural complexes...Keywords: structural control; silicic large igneous province; ignimbrite flare-ups; ash-flow caldera; epithermal;...of Triassic when the Central Atlantic Magmatic Province (CAMP) was emplaced [9–11]. According to Ernst...geodynamical environment at the origin of such a silicic province remain insufficiently understood, although Moume |  | | Conference Proceedings (Volume) | | area of the Kristineberg VHMS deposit, Skellefte district, Sweden .......................................A. Massive Zn-Cu-Pb deposits in the Røros ore district, Norway: setting and formation ................ The Jörn granitoid complex, Skellefte mining district, Sweden: petrography, lithogeochemistry and emplacement...for VHMS deposits, Kristineberg area, Skellefte District, Sweden ........................................Harald Hansen & Hannu Ahola Occurrence of gold (electrum) in the Lousal mine, Iberian pyrite belt, Portugal |
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