 | | Journal (article/letter/editorial) | | AND SUPERGENE WEATHERING IN THE EL PEÑÓN DISTRICT, NORTHERN CHILE IAN WARREN,† Yamana Gold, 9670 Gateway...Zealand Abstract The El Peñón epithermal gold-silver deposit, Region II, Chile, comprises multiple epithermal...Paleocene metallogenic belt of northern Chile. Quartz-adularia-carbonate veins are hosted in Paleocene...related to precious metals mineralization of the El Peñón deposit. Timing of hydrothermal activity in the...of weathering are constrained by ages for vein adularia, hypogene alunite, and supergene alunite determined |  | | Journal (article/letter/editorial) | | Abstract Volcanic rocks hosting quartz ± calcite ± adularia ± illite epithermal deposits undergo elemental...identification of important hydrothermal minerals (e.g., adularia, illite, smectite) and alteration processes that...around precious metal epithermal quartz ± calcite ± adularia ± illite deposits (e.g., Buchanan, 1981; White...alteration minerals for the El Peñón epithermal deposit, northern Chile. The same techniques are applied...boiling, in particular, causes precipitation of adularia (Browne and Ellis, 1970; Simmons and Browne, 2000) |  | Arfè, G., Boni, M., Mondillo, N., Aiello, R., Balassone, G., Arseneau, V. (2016) Mineralogy of the supergene alteration in the Capricornio Au–Ag epithermal vein system, Antofagasta region, Chile. Applied Earth Science, 125 (2) 74 doi:10.1080/03717453.2016.1166605 | Journal (article/letter/editorial) | | other important epithermal gold deposits, such as El Peñón (Warren 2005) and Faride (Camus and Skewes 1991)...Faride epithermal silver–gold deposit, Antofagasta region, Chile, Economic Geology, 86, 1222– 1237. Warren...geochemistry, and genesis of the El Peñón epithermal Au–Ag deposit, northern Chile: characteristics of a bonanza-grade...Capricornio Au–Ag epithermal vein system, Antofagasta region, Chile G. Arfè∗ 1, M. Boni1, N. Mondillo1,2,...Palaeocene-Eocene metallogenic belt, 60 km ENE from Antofagasta, in the physiographic Central Depression, between |  | | Journal (article/letter/editorial) | | other important epithermal gold deposits, such as El Peñón (Warren 2005) and Faride (Camus and Skewes 1991)...Faride epithermal silver–gold deposit, Antofagasta region, Chile, Economic Geology, 86, 1222– 1237. Warren...geochemistry, and genesis of the El Peñón epithermal Au–Ag deposit, northern Chile: characteristics of a bonanza-grade...Capricornio Au–Ag epithermal vein system, Antofagasta region, Chile G. Arfè∗ 1, M. Boni1, N. Mondillo1,2,...Palaeocene-Eocene metallogenic belt, 60 km ENE from Antofagasta, in the physiographic Central Depression, between |  | | Journal (article/letter/editorial) | | Low-sulfidation Epithermal Gold Deposits of Chile Shoji KOJIMA* Abstract: In Chile the principal gold deposits of...epithermal gold deposits in continental arcs such as Chile, is an important subject not only for gold metallogeny...the South American Continent. 1. Introduction Chile has been a world-class gold producer, in addition...type (or adularia-sericite type). These two styles of epithermal mineralization occur in Chile, particularly...eastern Precordillera. Additionally, in central Chile, major porphyry copper deposits (late Miocene-Pliocene) |  | Camprubi, A., Ferrari, L., Cosca, M. A., Cardellach, E., Canals, A. (2003) AGES OF EPITHERMAL DEPOSITS IN MEXICO: REGIONAL SIGNIFICANCE AND LINKS WITH THE EVOLUTION OF TERTIARY VOLCANISM. Economic Geology, 98 (5) 1029-1037 doi:10.2113/gsecongeo.98.5.1029 | Journal (article/letter/editorial) | | deposit, Temascaltepec district. From the latter, adularia from a barren stage of mineralization and from...by the 40Ar/39Ar method. The ages obtained from adularia samples are 32.9 ± 0.1 Ma and 33.3 ± 0.1 Ma, corresponding...activity of the Sierra Madre Occidental volcanic province (Staude and Barton, 2001). The Sierra Madre Occidental...as the Sierra Madre del Sur Tertiary magmatic province (Morán-Zenteno et al., 1999). The time relation...study, we present Ar-Ar ages obtained from two adularia samples of different mineralization stages, and |  | | Journal (article/letter/editorial) | | Silicification, quartz-adulariaillite Quartz, chalcedony, adularia Sulfide abundance Sulfidation-state indicators...Quartz, calcite, manganoan carbonates, rhodonite, adularia Moderate (5–30 vol.%) Tetrahedrite, chalcopyrite...lithocap of the Marte porphyry gold deposit, northern Chile (see Sillitoe 1994). b Steam-heated alteration exposed...Norte HS gold-silver orebody at La Coipa, northern Chile. Note its white, friable character. c Steam-heated...peripheral to the La Coipa HS-IS gold-silver district, Chile. f Hydrothermal breccia, generated by shallow-seated |  | Poblete, J. A., Bissig, T., Mortensen, J. K., Gabites, J., Friedman, R., Rodriguez, M. (2014) The Cerro Bayo District, Chilean Patagonia: Late Jurassic to Cretaceous Magmatism and Protracted History of Epithermal Ag-Au Mineralization. Economic Geology, 109 (2) 487-502 doi:10.2113/econgeo.109.2.487 | Journal (article/letter/editorial) | | Av. Vitacura 5250, Of. 404 Vitacura, Santiago, Chile Abstract The Cerro Bayo low sulfidation epithermal...tip of the Deseado Massif epithermal silver-gold province. Mineralization is hosted in the mainly rhyolitic...extent, in breccias, which, on the basis of new adularia 40Ar/39Ar ages, were emplaced in three main episodes:...mineralization in the Patagonian Andes of southern Chile. The protracted history of epithermal processes...Late Jurassic (e.g., El Faldeo: Palacios et al., 1997) to Late Cretaceous (e.g., El Toqui: Townley, 1997; |  | Essarraj, Samira, Boiron,, Marie Christine, Cathelineau, Michel, Tarantola, Alexandre, Leisen, Mathieu, Boulvais, Philippe (2017) Basinal Brines at the Origin of the Imiter Ag-Hg Deposit (Anti-Atlas, Morocco): Evidence from LA-ICP-MS Data on Fluid Inclusions, Halogen Signatures, and Stable Isotopes (H, C, O)—A Reply. Economic Geology, 112 (5) 1273-1277 doi:10.5382/econgeo.112.5.dis2 | Journal (article/letter/editorial) | | and development of the Central Atlantic magmatic province as the main ore-forming processes that triggered...a single, paragenetically ambiguous crystal of adularia (at ca. 254.7 ± 3.2 Ma) and barren syenite dike...Recent 40Ar/39Ar age dating of a single crystal of adularia yielded a well-defined age of 254.7 ± 3.2 Ma (Borisenko...uncertainty of the dated crystal. It is well known that adularia is not an ideal mineral for 40Ar/39Ar dating because...Essarraj et al. (2016) interpreted the formation of adularia as a result of diagenetic feldspathization close |  | Levresse, Gilles, Bouabdellah, Mohammed, Gasquet, Dominique, Cheilletz, Alain (2017) Basinal Brines at the Origin of the Imiter Ag-Hg Deposit (Anti-Atlas, Morocco): Evidence from LA-ICP-MS Data on Fluid Inclusions, Halogen Signatures, and Stable Isotopes (H, C, O)—A Discussion. Economic Geology, 112 (5) 1269-1272 doi:10.5382/econgeo.112.5.dis1 | Journal (article/letter/editorial) | | and development of the Central Atlantic magmatic province as the main ore-forming processes that triggered...a single, paragenetically ambiguous crystal of adularia (at ca. 254.7 ± 3.2 Ma) and barren syenite dike...Recent 40Ar/39Ar age dating of a single crystal of adularia yielded a well-defined age of 254.7 ± 3.2 Ma (Borisenko...uncertainty of the dated crystal. It is well known that adularia is not an ideal mineral for 40Ar/39Ar dating because...Essarraj et al. (2016) interpreted the formation of adularia as a result of diagenetic feldspathization close |  | | Book (edition) | | especies. Cabe señalar la actuación de Roberto Beder por el aporte del estudio de los minerales en las calizas...Brodtkorb, M.K. de, Gordillo, C. y Gay, H.D., 1983, el número de minerales ascendía a 466 debido principalmente...incorporación del estudio de minerales radiactivos. El anexo de la tercera versión, publicado por Milka...Pezzutti, S. Tourn, y M.E. Vattuone constó de 3 tomos. El primero incluyó las clases I (elementos) y II (sulfuros...sulfosales, seleniuros y telururos), publicado en 2002. El Tomo 2, involucró las clase III (halogenuros), clase |  | | Journal (article/letter/editorial) | | Au-Ag deposit associated with quartz ± calcite ± adularia ± illite assemblages located in the Coromandel...epithermal deposits associated with quartz ± calcite ± adularia ± illite assemblages, is the destruction of igneous...which reflect the replacement of plagioclase by adularia and/or illite. Calcium depletion also reflects...epithermal deposits associated with quartz ± calcite ± adularia ± illite assemblages. Potassium, Na, Rb, Sr, and...epithermal deposits associated with quartz ± calcite ± adularia ± illite assemblages. However, the area defined |  | Leary, Stephen, Sillitoe, Richard H., Stewart, Peter W., Roa, Karl J., Nicolson, Benjamin E. (2016) Discovery, Geology, and Origin of the Fruta del Norte Epithermal Gold-Silver Deposit, Southeastern Ecuador. Economic Geology, 111 (5) 1043-1072 doi:10.2113/econgeo.111.5.1043 | Journal (article/letter/editorial) | | manganese- and base metal-poor quartz and calcite. Adularia is a minor main-stage gangue mineral in each....due to a national moratorium on exploration and mine development activities imposed by the Ecuadorian...complete feasibility studies for a bulk underground mine and gravity, flotation, and tailings leach facility...Chiaradia et al., 2009), including several for vein adularia from the Fruta del Norte deposit (P.W. Stewart...of white quartz and/or chalcedony and calcite ± adularia veins (Fig. 13), typically with only minor sulfide |  | Simpson, Mark P., Gazley, Michael F., Stuart, Alistair G.J., Pearce, Mark A., Birchall, Renee, Chappell, Debra, Christie, Anthony B., Stevens, Murray R. (2019) Hydrothermal Alteration at the Karangahake Epithermal Au-Ag Deposit, Hauraki Goldfield, New Zealand. Economic Geology, 114 (2) 243-273 doi:10.5382/econgeo.2019.4630 | Journal (article/letter/editorial) | | Australia 6630, Australia 3 Fraser Thomas Ltd, 21 El Kobar Drive, East Tamaki, Auckland 2013, New Zealand...is altered by combinations of quartz, chlorite, adularia, albite, illite, pyrite, calcite, mixed-layered...present in both strongly and weakly altered rocks. Adularia is widespread and extends laterally up to 500...coextensive with and locally occurs beyond the adularia halo. The zone of illite alteration is bordered...the Maria and Welcome/Crown veins are altered to adularia, albite, illite, chlorite, and rare calcite and |  | Camprubí, Antoni, Chomiak, Beverly A., Villanueva-Estrada, Ruth E., Canals, Àngels, Norman, David I., Cardellach, Esteve, Stute, Martin (2006) Fluid sources for the La Guitarra epithermal deposit (Temascaltepec district, Mexico): Volatile and helium isotope analyses in fluid inclusions. Chemical Geology, 231 (3) 252-284 doi:10.1016/j.chemgeo.2006.02.002 | Journal (article/letter/editorial) | | Temascaltepec area, three main vein sets occur from NW to SE: El Coloso, La Guitarra, and Mina de Agua (Fig. 1) which...length of the vein deposit formed by La Guitarra and El Coloso veins zones altogether is more than 3.5 km...latter includes the rhyolitic feeder neck of Cerro El Peñón, dated at 34.87 ± 0.15 Ma by the 40Ar/39Ar method...late-Laramide granitic suite, whilst the veins of El Coloso area are hosted by all the lithological units...1 and 33.3 ± 0.1 Ma by the 40Ar/39Ar method on adularia samples (Camprubí et al., 2003). A. Camprubí |
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