 | | Journal (article/letter/editorial) | | and Geologic Overview of the Yanacocha Mining District, Cajamarca, Peru LEWIS TEAL1,† AND ALBERTO BENAVIDES2...BENAVIDES2 1Newmont 2Minas Peru Ltd., Calle 41, No. 894, Urb. San Isidro, Lima, Peru Buenaventura S.A.A.,...Santa Catalina, Lima, Peru Abstract Discovery and recognition of the Yanacocha district as a belt of northeast-trending... near-surface, high sulfidation-type epithermal gold deposits with strong supergene oxidation was made...through a joint-venture alliance operated by Newmont Mining Corporation with partners Compañia de Minas Buenaventura |  | | Journal (article/letter/editorial) | | Volcanism and Associated Hydrothermal Gold Deposits at Yanacocha, Peru** ANTHONY A. LONGO,†,1,* JOHN H. DILLES...Oregon 97370 and Minera Yanacocha and Newmont Mining Corporation, Cajamarca, Peru 2Department 3College...of gold are hosted by advanced argillic-altered Miocene volcanic rocks in the Yanacocha district, northern...northern Peru (lat. 6°59'30" S, long. 78°30'45" W). We describe the nature of the volcanism and its relation...relation to the gold ores on the basis of new district-scale geologic mapping, 69 40Ar/39Ar ages on igneous |  | Deditius, Artur P., Utsunomiya, Satoshi, Sanchez-Alfaro, Pablo, Reich, Martin, Ewing, Rodney C., Kesler, Stephen E. (2015) Constraints on Hf and Zr mobility in high-sulfidation epithermal systems: formation of kosnarite, KZr2(PO4)3, in the Chaquicocha gold deposit, Yanacocha district, Peru. Mineralium Deposita, 50 (4) 429-436 doi:10.1007/s00126-015-0586-z | Journal (article/letter/editorial) | | KZr2(PO4)3, in the Chaquicocha gold deposit, Yanacocha district, Peru Artur P. Deditius 1 & Satoshi Utsunomiya...high-sulfidation epithermal gold deposit in the Yanacocha mining district, Peru. Kosnarite crystals are small...kosnarite in the advanced argillic alteration zone at Yanacocha is indicative of Hf and Zr mobility under highly...been reset. Keywords Kosnarite . Chaquicocha . Yanacocha . Hafnium . Zirconium . Phosphate Introduction...Chaquicocha high-sulfidation epithermal gold deposit, Yanacocha district, Peru, and provide mineralogical evidence |  | Chen, Jing, Cooke, David R., Piquer, José, Selley, David, Zhang, Lejun, White, Noel C. (2019) Hydrothermal Alteration, Mineralization, and Structural Geology of the Zijinshan High-Sulfidation Au-Cu Deposit, Fujian Province, Southeast China. Economic Geology, 114 (4) 639-666 doi:10.5382/econgeo.4657 | Journal (article/letter/editorial) | | Tasmania, Australia 2 Transforming 3 Instituto the Mining Value Chain (TMVC), ARC Industrial Transformation...China Abstract Zijinshan is a world-class Au-Cu district located in southwest Fujian Province, southeast...Associated deposits include high-sulfidation epithermal gold-copper, intermediate-sulfidation epithermal polymetallic...deposit is located in the middle of the Zijinshan district, and ore zones are hosted in, below, and adjacent...157 Ma. 40Ar/39Ar age spectra of hydrothermal alunite indicate that hydrothermal activity at Zijinshan |  | | Journal (article/letter/editorial) | | investigate the inter-instrument variation of the alunite 1,480-nm OH (overall range ~1,475– 1,498 nm) and...from the Economic Geology Research Unit generates alunite results 1 to 2 nm lower than those of the CODES...each other, mostly with 0- to 1-nm differences in alunite 1,480-nm spectral absorption measurements, but...to 4 nm, mostly with 2- to 3-nm differences in alunite measurements. Compared with the PIMA results, one...to 5 nm off, mostly with 3-nm differences, in alunite measurements. The white mica Al-OH spectral absorption |  | | Journal (article/letter/editorial) | | Mineralization Below the Kasuga Lithocap, Nansatsu District, Japan Eiji IZAWA1 and Toshihiko HAYASHI2 1...exist beneath the lithocap-hosted Nansatsu-type gold deposits. The Kasuga lithocap extends for about...this lithocap, there are contemporaneous epithermal gold-quartz veins. A 1200-m hole was drilled in 1999...from the deep drilling site. Keywords: epithermal, gold deposit, high sulfidation, lithocap, porphyry. 1...and is the major gold-producing area in Japan. The north Satsuma (Hokusatsu) district is characterized |  | | Journal (article/letter/editorial) | | of giant porphyry-related mineralization (Yanacocha, Peru) Massimo Chiaradia ⁎, Daniel Merino, Richard...Editor: R.W. Carlson Keywords: Yanacocha magmatism adakite-like gold geochronology radiogenic isotopes...r a c t The Yanacocha magmatic field (northern Peru) hosts the largest high sulfidation gold deposit on...“normal” to adakite-like signatures. The giant Yanacocha ore system developed in coincidence with the ∼...high-sulfidation system of Yanacocha, northern Peru, the world's largest gold deposit of this type. Our |  | | Journal (article/letter/editorial) | | in magmatic arc settings. At the regional and district scales, the occurrence of many deposits in belts...SierritaEsperanza Red Mountain Santa Rita (Central dist.) Yanacocha Antamina Bisbee Santo Tomas II & Nugget Hill...the geology of porphyry Cu systems at regional, district, and deposit scales. The resultant geologic model...(Sillitoe, 2005, and references therein). 72° 68° PERU 18° ARICA BOLIVIA Collahuasi Chuquicamata El...El Abra 22° A AL C M E ALT O Regional- and District-Scale Characteristics 0361-0128/98/000/000-00 |  | Cerpa, Luis M., Bissig, Thomas, Kyser, Kurt, McEwan, Craig, Macassi, Arturo, Rios, Hugo W. (2013) Lithologic controls on mineralization at the Lagunas Norte high-sulfidation epithermal gold deposit, northern Peru. Mineralium Deposita, 48 (5) 653-673 doi:10.1007/s00126-013-0455-6 | Journal (article/letter/editorial) | | Lagunas Norte high-sulfidation epithermal gold deposit, northern Peru Luis M. Cerpa & Thomas Bissig & Kurt...high-sulfidation epithermal gold deposit of Lagunas Norte, Alto Chicama District, northern Peru, is hosted in weakly...Misquichilca, Av. Victor Andrés Belaunde, Lima, Peru (2.1 ‰) indicate a magmatic source for the sulfur...quartz–alunite and a quartz–alunite–kaolinite zone is observed. Company data suggest that gold is present...quartzite, gold mineralization is hosted in a fracture network filled with coarse alunite, auriferous |  | Burrows, David R., Rennison, Michael, Burt, David, Davies, Rod (2020) The Onto Cu-Au Discovery, Eastern Sumbawa, Indonesia: A Large, Middle Pleistocene Lithocap-Hosted High-Sulfidation Covellite-Pyrite Porphyry Deposit. Economic Geology, 115 (7). 1385-1412 doi:10.5382/econgeo.4766 | Journal (article/letter/editorial) | | Island, Indonesia. A very large and blind copper-gold deposit (Onto) was discovered, in which copper occurs... with a vertical thickness of ≥1 km. Copper and gold are spatially related with a series of coalesced...from illite-smectite, quartz-dickite to quartz-alunite and quartz-pyrophyllite ± diaspore alteration....and is located at or near the top of the quartz-alunite alteration. Mineralization starts below the lowermost...current resource in quartz-pyrophyllite-alunite and quartz-alunite alteration. Mineralization is dominated |  | Deditius, Artur P., Utsunomiya, Satoshi, Renock, Devon, Ewing, Rodney C., Ramana, Chintalapalle V., Becker, Udo, Kesler, Stephen E. (2008) A proposed new type of arsenian pyrite: Composition, nanostructure and geological significance. Geochimica et Cosmochimica Acta, 72 (12) 2919-2933 doi:10.1016/j.gca.2008.03.014 | Journal (article/letter/editorial) | | on As-free pyrite in a hydrothermal gold deposit at Yanacocha, Peru. XPS analyses of the As3+-pyrite confirm...concentration of toxic arsenic and trace metals. The Yanacocha deposit, in which As3+-pyrite was found, formed...known for its dual role as an important host for gold in ore deposits and a major source of arsenic and...may be correlated with increase concentration of gold (Fleet et al., 1993). In subsequent XANES investigations...pyrrhotite in the areas enriched in nanoparticulate gold, but a highly crystalline matrix of only arsenian |  | | Journal (article/letter/editorial) | | to rocks altered by acidic fluid associated with gold-bearing epithermal ore deposits. Keywords: pyrophyllite...along the pyrophyllite structure to evaluate the gold content of the deposit. The surface samples were...the pyrophyllite core revealed anomalous values in gold, between 0.3 and 0.75 g/t. These values are relatively...relatively low but are similar to those of the Yanacocha mine (Peru), where the average Au grade of ore is 0...described in the pyrophyllite deposit of the Shobara district, in southwestern Japan (Ohkawa et al. 2000). Superposition |  | Volkov, A. V., Savva, N. E., Sidorov, A. A., Kolova, E. E., Chizhova, I. A., Alekseev, V. Yu. (2015) The Agan epithermal gold-silver deposit and prospects for the discovery of high-sulfidation mineralization in northeast Russia. Geology of Ore Deposits, 57 (1) 21-41 doi:10.1134/s1075701515010067 | Journal (article/letter/editorial) | | Vol. 57, No. 1, pp. 25–47. The Agan Epithermal Gold–Silver Deposit and Prospects for the Discovery of...during prospecting in the Central Okhotsk ore district of the Okhotsk–Chukotka volcanogenic belt (OChVB)...epithermal depos its. It was found that quartz–alunite metasomatites in the ore field are characterized...mineralization developed in siliceous and quartz–alunite litho caps, which are formed above degassing intrusions... 2011). The extremely rapid growth of world gold mining from HS epithermal deposits in recent years as |  | Pan, Jun-Yi, Ni, Pei, Chi, Zhei, Wang, Wen-Bin, Zeng, Wen-Can, Xue, Kai (2019) Alunite 40Ar/39Ar and Zircon U-Pb Constraints on the Magmatic-Hydrothermal History of the Zijinshan High-Sulfidation Epithermal Cu-Au Deposit and the Adjacent Luoboling Porphyry Cu-Mo Deposit, South China: Implications for Their Genetic Association. Economic Geology, 114 (4) 667-695 doi:10.5382/econgeo.4658 | Journal (article/letter/editorial) | | Economic Geology, v. 114, no. 4, pp. 667–695 Alunite 40Ar/39Ar and Zircon U-Pb Constraints on the M...Institute of Geological Survey, Fuzhou 350013, China Mining Group Co., Ltd., Shanghang 364200, China Abstract...deposit, constitutes a major porphyry-epithermal ore district in South China. Current debate centers on whether...question of importance for exploration in the district. In this contribution, the magmatichydrothermal...Zijinshan and Luoboling is reconstructed based on new alunite 40Ar/39Ar ages from Zijinshan and zircon U-Pb ages |  | | Journal (article/letter/editorial) | | information on the distribution of copper, zinc, lead, gold, silver, barium, arsenic, antimony, mercury, selenium...high-sulfidation epithermal deposits in the Pueblo Viejo district, Dominican Republic. Moore and Monte Negro are...covered by rocks containing low, but still anomalous gold grades. At Moore, concentrations of all elements...McCurdy Managing Director Citibank, N.A., Global Mining and Metals, 388 Greenwich Street, New York, NY...High sulfidation Æ Acidsulfate Æ Trace element Æ Gold Æ Pueblo Viejo Introduction Quantitative information |  | | Journal (article/letter/editorial) | | No. 2 EXPRESS LETTER HYPOGENE ALUNITE FROM THE EL SALVADOR DISTRICT, CHILE, INDICATES POTENTIAL FOR...hypogene alunite that cement late breccia bodies from the El Salvador porphyry copper district of Chile...Chile were recently dated. One alunite sample over the principal Turquoise Gulch porphyry deposit has a 40Ar/39Ar...intrusion. Two other samples associated with quartz-alunite replacement of rhyolite, ~750 m southwest of the...43 Ma. Porphyry copper ores in the El Salvador district formed at about the same time as porphyry intrusions |  | | Journal (article/letter/editorial) | | Cu–Au–Mo deposits and the giant Yanacocha Au deposit, northern Peru R. C. I. Davies and P. J. Williams...patrick.williams@jcu.edu.au) The Cajamarca region of northern Peru hosts a number of significant Tertiary...deposits, including the world class Late Miocene Yanacocha high sulphidation Au deposit and the Early-Mid...High-sulphidation deposits near Cajamarca, including the giant Yanacocha mine and possibly smaller Sipan deposit...Miocene porphyritic stocks outside of the Yanacocha district have been identified in the region. The locations |  | | Journal (article/letter/editorial) | | Article Hydrothermal corundum, topaz, diaspore and alunite supergroup minerals in the advanced argillic alteration...natroalunite. High level lithocaps include natroalunite/alunite-kaolinite/dickite-pyrite bearing assemblages of...Episodic magmatic-hydrothermal activity in the district is characterized by several stages of advanced...diaspore, aluminum-phosphate-sulfate minerals, alunite, porphyry-epithermal, Kassiteres-Sapes, Greece...quartzpyrophyllite at depth to predominant quartz-alunite and vuggy quartz at shallower levels where the |  | | Journal (article/letter/editorial) | | advanced argillic alteration, typically quartz-alunite with halos of kaolinite ± dickite and roots of...has higher Au (and Cu) grades than the quartz-alunite halo. Tonnage in these high sulfidation systems...depth, Na and K alunite become stable. At the lowest temperature (<200°C), the alunite dissolves, leaving...lithocap alteration, residual quartz and/or quartz-alunite, is commonly offset from the surface projection...Sverjensky et al., 1991), and the stability of alunite (Hemley et al., 1969; Stoffregen et al., 2000) |  | | Journal (article/letter/editorial) | | METALS IN THE FORMATION OF HIGH-SULFIDATION LODE GOLD DEPOSITS JOHN MAVROGENES,1,† RICHARD W. HENLEY,1...Geological Survey, Denver, Colorado Abstract In enargite-gold (high-sulfidation) vein deposits, magmatic fluid...low-grade silver-gold deposits such as Yanacocha, Peru. Introduction Enargite-gold vein deposits are...tonnage, high- sulfidation deposits such as Yanacocha, Peru. Their geochemical, fluid inclusion, stable...sulfosalt textures and compositions from enargite-gold vein deposits from around the world. Annotated photomicrograph |  | | Journal (article/letter/editorial) | | High-Sulfidation Epithermal Gold Deposit, El Indio-Pascua Belt, Argentina: Geochronology of Alunite and Jarosite Elizabeth...and Thomas Monecke3 1 Department 2 Mineral of Mining Engineering, Colorado School of Mines, 1600 Illinois...world-class Veladero high-sulfidation epithermal gold deposit is located near the northern end of the...40Ar-39Ar alunite and jarosite ages were obtained at four mineralized centers in the Veladero district: the...alteration and related gold mineralization were episodic, and activity in the Veladero district occurred over |  | Huang, Wenting, Liang, Huaying, Wu, Lei, Wu, Jing, Li, Jing, Bao, Zhiwei (2018) Asynchronous formation of the adjacent epithermal Au-Cu and porphyry Cu-Mo deposits in the Zijinshan orefield, southeast China. Ore Geology Reviews, 102. 351-367 doi:10.1016/j.oregeorev.2018.09.023 | Journal (article/letter/editorial) | | University, Nanning, Guangxi 530004, China 4. Zijin Mining Group Co, Ltd, Shanghang 364200, China *Corresponding...metal associations. The age data indicate that the alunite-dickite alteration related to the HSE Au-Cu mineralization...located in Fujian Province and is the richest Au-Cu mining area in southeast China (Zhang, 2013; Fig. 1)....the largest epithermal gold deposit in China and contains with 305 tons of gold at an average grade of...silicic-alteration (Q) zone, (2) an alunite-alteration (Alu-Q) zone, (3) an either alunite alteration zone that overprints |  | | Journal (article/letter/editorial) | | particularly IS epithermal orebodies in any particular district, irrespective of whether or not paleosurface features...Silicification, vuggy residual quartz, quartz-alunite Quartz, alunite, barite Silicification, quartz-adulariaillite...H2S-bearing steam condensate Opal/chalcedony, alunite, kaolinite, smectite H2S-bearing steam condensate...argillic assemblage comprises powdery opaline silica, alunite, and/or kaolinite (Fig. 4b), depending on solution...zones, like that capping part of the Ladolam LS gold deposit, Lihir Island, Papua New Guinea, are represented |  | Deditius, Artur P., Reich, Martin, Kesler, Stephen E., Utsunomiya, Satoshi, Chryssoulis, Stephen L., Walshe, John, Ewing, Rodney C. (2014) The coupled geochemistry of Au and As in pyrite from hydrothermal ore deposits. Geochimica et Cosmochimica Acta, 140. 644-670 doi:10.1016/j.gca.2014.05.045 | Journal (article/letter/editorial) | | sulfide (VHMS), Witwatersrand Au, iron oxide copper gold (IOCG), and coal deposits. Pyrite included in the...2004; Deditius et al., 2011a; Hough et al., 2012). Gold and arsenic incorporation into pyrite is strongly...concentration (Chen et al., 2013). 2.2 Gold solubility and speciation Gold is present in arsenian pyrite as...high-sulfidation epithermal Au deposit in Yanacocha, Peru. These anomalous behaviours of Au in arsenian...hydrothermal coarsegrained pyrite are usually below 10 ppm. Gold tends to concentrate in As-rich zones and/or zones |  | Schütte, Philip, Chiaradia, Massimo, Barra, Fernando, Villagómez, Diego, Beate, Bernardo (2012) Metallogenic features of Miocene porphyry Cu and porphyry-related mineral deposits in Ecuador revealed by Re-Os, 40Ar/39Ar, and U-Pb geochronology. Mineralium Deposita, 47 (4) 383-410 doi:10.1007/s00126-011-0378-z | Journal (article/letter/editorial) | | dated by means of molybdenite Re-Os, biotite and alunite 40 Ar/39Ar, and titanite U-Pb geochronology. Most...with its coeval counterpart in northern-central Peru. Although both belt segments were formed in an overall...are best defined in the central Andes of southern Peru and northern-central Chile (ca. lat. 13– 34° S)...early Oligocene, and Miocene to early Pliocene age. Gold tends to be concentrated in discrete belts and districts...(2012) 47:383–410 belt in northern and central Peru (lat. 6–13° S) hosts a number of world-class Cu |
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