 | | Journal (article/letter/editorial) | | Geological and Hydrothermal Processes, Northern Peru a b Andrew W. Macfarlane , Rosa-Maria Prol-Ledesma...Geological and Hydrothermal Processes, Northern Peru, International Geology Review, 36:7, 645-677, DOI:...Geological and Hydrothermal Processes, Northern Peru A N D R E W W. MACFARLANE, Department of Geology...94720 Abstract Mineralization in the Hualgayoc district of northern Peru occurs in altered Miocene felsic...0.2 Ma Hualgayoc rhyodacite. A five-point Rb-Sr isochron for the San Miguel intrusion at Cerro Coymolache |  | | Journal (article/letter/editorial) | | Associated Hydrothermal Gold Deposits at Yanacocha, Peru** ANTHONY A. LONGO,†,1,* JOHN H. DILLES,2 ANITA...Yanacocha and Newmont Mining Corporation, Cajamarca, Peru 2Department 3College of Geosciences, Oregon...volcanic rocks in the Yanacocha district, northern Peru (lat. 6°59'30" S, long. 78°30'45" W). We describe...and Chaupiloma (19.5–15.9 Ma), and the dacitic Cerro Fraile pyroclastics (15.5–15.1 Ma). The younger...spatially associated with gold deposits at Quilish and Cerro Negro (~7 Moz Au) and stage 1 alunite (13.6–12.6 |  | | Journal (article/letter/editorial) | | of Miocene porphyry systems in the Cajamarca district, northern Peru Received: 29 September 2004 / Accepted:...deposits located in the auriferous Cajamarca district of northern Peru. The El Galeno deposit (486 Mt at...tite (potassic) alteration was associated with pyrite and chalcopyrite mineralisation. A quartz–magnetite...8% Cu) and are characterised by chalcopyrite and pyrite mineralisation. The core of the deposit is defined...Galeno-Michiquillay) and Au-rich (Minas Conga) deposits in the Cajamarca region are of similar age (early–middle Miocene) |  | | Journal (article/letter/editorial) | | Mining District, Cajamarca, Peru LEWIS TEAL1,† AND ALBERTO BENAVIDES2 1Newmont 2Minas Peru Ltd., Calle 41...Isidro, Lima, Peru Buenaventura S.A.A., Ave. Carlos Villaran 790, Urb. Santa Catalina, Lima, Peru Abstract...before COLOMBIA 0° ECUADOR General Geology of Peru 4° Intrusive Rocks (Various ages) Yanacocha BRAZIL...1. Schematic map showing the geology of western Peru and general location of the Yanacocha mining district...OVERVIEW OF THE YANACOCHA MINING DISTRICT, CAJAMARCA, PERU the modern exploration era, its existence |  | | Book | | Universidad Nacional de lngenieria, and Newmont Peru Limited Gerente de Exploraciones Av. Jose Galvez...Galvez Barrenechea 218, Urb. Corpac Lima-San Isidro, Peru Prof. Dr. ESTEBAN CEDILW Facultad de Minas, Metalurgia...place in September 1986 in Cusco, Peru, sponsored by Multiciencias (Peru) and UNESCO. During this seminar...Latorre, Director of the Multiciencias courses in Peru strongly supported the whole organization of the...Occurrences in the Paleozoic of the Yauli Dome, Central Peru H. W. Kobe . . . . . . . . . . . . . . . . . . |  | | Journal (article/letter/editorial) | | Peridotite Zone; and pyrrhotite with pentlandite, pyrite and chalcopyrite in Gabbronorite I of the Lower...stage, unaltered plumose marcasite and framboidal pyrite samples contain the lowest total abundances of...composition. Late plumose marcasite, and the framboidal pyrite with the lowest minor element abundance, also have...sulphides accompanied by minor sphalerite, galena, and pyrite, and rare carrollite. Alteration phases include...replacive after essentially syngenetic framboidal pyrite and diamictite clasts, and form mantles around |  | | Journal (article/letter/editorial) | | deposits and the giant Yanacocha Au deposit, northern Peru R. C. I. Davies and P. J. Williams DOI 10.1179/037174503225002171...patrick.williams@jcu.edu.au) The Cajamarca region of northern Peru hosts a number of significant Tertiary...the Early-Mid Miocene Au-rich Minas Conga and Cerro Corona porphyry deposits. Based on structural, geochemical...bornite; ccp, chalcopyrite; mag, magnetite; pyr, pyrite B200 Applied Earth Science (Trans. Inst. Min....hypogene sulphide assemblages of chalcopyrite and pyrite, and potassic alteration zones overprinted by low-grade |  | 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) | | 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)...(2012) 47:383–410 belt in northern and central Peru (lat. 6–13° S) hosts a number of world-class Cu...continuity with the Miocene metallogenic belt of northern Peru and, possibly, with Miocene mineralization in southern...the Miocene metallogenic belt of northern-central Peru (Sillitoe and Perelló 2005). Furthermore, the new |  | | Journal (issue) | | .................. 60 Special Report: Mining in Peru The engine to rebuild an economy..................(km) east of the Winu deposit in the Paterson province of Western Australia. The inferred mineral resource...worth at sites around the world. Recent results from Peru, India and Australia have shown that mines can now...the Antipa’s 100% owned ground in the Paterson Province of Western Australia. The farm-in area is to be...News-Australia/Oceania - from p. 16) of a Carrapateena “Life of Province Scoping Study,” which considers the future potential |  | | Journal (article/letter/editorial) | | inferred to measured resources is primarily the province of geoscientists and is all about reducing uncertainty...overprint defined by zoisite¡ chlorite¡muscovite¡pyrite¡hematite replaces earlier alteration stages. A...(Marschik et al., 2010), with minor sphalerite and pyrite viewable in hand specimen. This is hosted in brittle...disseminated sulphides hosted in quartz vein structures. Pyrite, arsenopyrite, chalcopyrite and pyrrhotite are...identified. Gold is principally associated with the pyrite 2 phase occurring both as rounded sub-micrometre |  | Cunningham, Charles G., Zappettini, Eduardo O., Vivallo S., Waldo, Celada, Carlos Mario, Quispe, Jorge, Singer, Donald A., Briskey, Joseph A., Sutphin, David M., Gajardo M., Mariano, Diaz, Alejandro, Portigliati, Carlos, Berger, Vladimir I., Carrasco, Rodrigo, Schulz, Klaus J. (2008) Quantitative Mineral Resource Assessment of Copper, Molybdenum, Gold, and Silver in Undiscovered Porphyry Copper Deposits in the Andes Mountains of South America. Open-File Report 2008-1253. US Geological Survey doi:10.3133/ofr20081253 | Report (issue) | | geological surveys of Argentina, Chile, Colombia, Peru, and the United States Quantitative Mineral Resource...Carrasco Peru INGEMMET Jorge Quispe Jointly publi shed by: Country Argentina Chile Colombia Peru United...(SEGEMAR), Chile (SERNAGEOMIN), Colombia, (INGEOMINAS), Peru (INGEMMET), and the United States (USGS) iii Probability...(SEGEMAR), Chile (SERNAGEOMIN), Colombia, (INGEOMINAS), Peru (INGEMMET), and the United States (USGS) v Figure...Colombia. Instituto Geológico Minero y Metalúrgico, Peru. U.S. Geological Survey, Menlo Park, CA, USA. Abstract |  | | Journal (article/letter/editorial) | | 1,250 km long and is an important metallogenic province, containing over 13 past- and present-producing...KOBYLINKSI ET AL. Pyrite in barren rocks is essentially absent or very rare, whereas pyrite in Cu-bearing...Cu-bearing tonalite is common but minor in volume. Pyrite occurs as disseminated small (up to several mm) cubes...minute (20 mm in length) inclusions in epidote. Rare pyrite cubes are found in quartz veins. Secondary magnetite...contain epidote, chlorite, and rare white mica and pyrite but no evidence of potassic alteration. Cu-bearing |  | | Report (issue) | | PRELIMfNARY STUDYOF GOLDPARTITIONING AMONGPYRRHOTITE,PYRITE,MAGNETITE,AND CHALCOPYRITE IN GOLD-SATURATED CHLORJDESOLUTIONSAT...PRELIMINARYSTUDYOF GOLD PARTITIONINGAMONG PYRRHOTITE, PYRITE, MAGNETITE,AND CHALCOPYRITE IN GOLD-SATURATEDCHLORIDESOLUTIONS...saturationwith pure Au. The solubility of Au in pyrrhotite,pyrite, magnetite, and chalcopyrite is determinedusing...indicate the relativ efficiency with which pyrrhotite. pyrite, magnetit , and chalcopyrite may seque t r Au during...limiting solubility of Au metal in the minerals pyrite-pyrrhoti~ buffer :I: chalcopyria. These dataplacean |
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Cerro Corona, Hualgayoc Province, Cajamarca, Peru