 | | 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...systems. K-Ar dates on sericite, hydrothermal biotite, and alunite indicate that the most important hydrothermal |  | | Journal (article/letter/editorial) | | Associated Hydrothermal Gold Deposits at Yanacocha, Peru** ANTHONY A. LONGO,â ,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 (19.5â15.9 Ma), and the dacitic Cerro Fraile pyroclastics (15.5â15.1 Ma). The younger...spatially associated with gold deposits at Quilish and Cerro Negro (~7 Moz Au) and stage 1 alunite (13.6â12.6 |  | | 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...WNW-trending fold-thrust structures. Early K-feldsparâbiotiteâmagnetite (potassic) alteration was associated...Galeno-Michiquillay) and Au-rich (Minas Conga) deposits in the Cajamarca region are of similar age (earlyâmiddle Miocene)...Keywords Northern Peru Ă Copper Ă Gold Ă Miocene Ă Porphyry Introduction The Cajamarca mining region, located |  | | Journal (article/letter/editorial) | | Mining District, Cajamarca, Peru LEWIS TEAL1,â 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) | | ferroan dolomite, quartz, and chlorite with minor biotite. The majority of ore sulphides are replacive after...ultramafic lamprophyre emplacement in the alkaline province located 64uâ67uN in southern West Greenland, Lithos...This Southern Africa is a world-class uranium province, with an age span of deposits from Archaean to...small uraninite grains hosted by magnetite or biotite would also be difficult to process. QEMSCAN analyses...located in north of Varzeghan, East-Azarbaidjan province, NW Iran. The deposit is hosted by quartz monzonitic |  | SchĂŒtte, Philip, Chiaradia, Massimo, Barra, Fernando, VillagĂłmez, 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) | | Ecuador were dated by means of molybdenite Re-Os, biotite and alunite 40 Ar/39Ar, and titanite U-Pb geochronology...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. 13â 34° S)...(2012) 47:383â410 belt in northern and central Peru (lat. 6â13° S) hosts a number of world-class Cu...continuity with the Miocene metallogenic belt of northern Peru and, possibly, with Miocene mineralization in southern |  | | 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...mineral assemblages (plagioclaseâ hornblende ± biotite) and HREE-depleted REE profiles (average LaN/YbN...Syn-mineralisation intrusions are associated with biotite phenocrysts and display minor enrichment in Th |  | 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 GeolĂłgico Minero y MetalĂșrgico, Peru. U.S. Geological Survey, Menlo Park, CA, USA. Abstract |  | | Journal (article/letter/editorial) | | Yanacocha high-sulïŹdation epithermal deposit in Peru underlain by porphyry Cu prospects (Chambefort et...of high Ce4+/Ce3+ in zircon grains from the Cerro Corona intrusive complex that hosts porphyry CuâAu...U-Pb dating of zircon and 40Ar/39Ar dating of biotite at Bingham, Utah. Econ. Geol., 96, 1671â1683. Pollard |  | | Journal (article/letter/editorial) | | 1,250 km long and is an important metallogenic province, containing over 13 past- and present-producing...are, in order of abundance, plagioclase, quartz, biotite, hornblende, titanite, magnetite, zircon, and apatite... Among these minerals, primary hornblende and biotite proximal to the ore zone are altered and recognized...textures in thin sections. Unaltered hornblende and biotite are observed only in barren tonalites distal (>5...relict hornblende (Hbl) replaced by secondary biotite, sample GBR-8. Rims are replaced by chlorite. (B) |  | | Journal (article/letter/editorial) | | Purico-Chascon at 23°S (Hawkesworth et al, 1982), the Cerro Galan Caldera at 26°S (Francis et al., 1980,1983...Pacana Caldera at 23°S (Gardeweg & Ramirez, 1987), Cerro Tumisa at 23°S [Journal cfPrtrotogy. Vol. 35. Put...fine-grained lake sediments (Peine Formation and Cerro Negro Strata) of Permian to Triassic age, which...dominant ferromagnesian phase. Minor pyroxenes and biotite also occur. This type of pumice may represent disturbed...inclusions occur commonly in lavas of the nearby Cerro Tumisa (Gardeweg, 1991b), and have been interpreted |  | | Journal (article/letter/editorial) | | ranging from fine-grained, to medium grained biotite granites, porphyritic granites and granodiorites...generally contain perthitic microcline as well as biotite and muscovite and lesser amounts of hornblende...inferred to measured resources is primarily the province of geoscientists and is all about reducing uncertainty...gold-quartz veins. A narrow (5â20 cm) alteration halo of biotite, arsenopyrite, rutileÂĄtourmaline surrounds the...Project, located in the Sindirgi Gold Corridor, a province which is host to other epithermal and porphyry |  | Nikkhah, Ayyub, Vakylabad, Ali Behrad, Hassanzadeh, Ahmad, Niedoba, Tomasz, Surowiak, Agnieszka (2022) An Evaluation on the Impact of Ore Fragmented by Blasting on Mining Performance. Minerals, 12 (2) 258 doi:10.3390/min12020258 | Journal (article/letter/editorial) | | Late Fine Porphyry, QS: Quartz Sericite, Bio: Biotite, SQ: Sericiti Quartz, and GR: Granite [67,68]....Late Fine Porphyry, QS: Quartz Sericite, Bio: Biotite, SQ: Sericiti Quartz. Table A4. Collected data...impacts on downstream processing at Goldfields Cerro Corona. In Proceedings of the 11th International Symposium |  | | Report (issue) | | differentrock rypcs (a quartz arenite, b granite, c biotite schist, d gabbro, e grcenschist). The dashedcurve...minerals,the presence fl ~ infcn:umulus lpllitc. biotite, ApaJiJeOccurrenceand Chemistry The abundanceof...balopn-bearing minerals. A formulationof the apatite-biotite F-OH ..,._...omctcr that takesintoaccountthe Mg/Fe...Sverjensky( 1992). F-Olfexdlengebetweenapatiteand biotite can be IIPllallll inthefollowingend-memberexchange...significantly for 2 + Ca5(PO4)1F biolile apalite biotite compositionsvarying from phlogopite-to (1) annite-rich |  | | Report (issue) | | Canada, Ukraine Canada, Belarus, Russia, Germany Peru, Bolivia, China, Indonesia Norway, Russia, Finland...Africa, Kazakhstan, Russia, Zimbabwe Canada Canada, Peru, Mexico, Australia China, Canada, Austria, Australia...China, Venezuela, Russia, Norway Mexico, Canada, Peru, Chile Canada, Russia, Israel, China China, Ireland...Russia, Ukraine South Africa, China Chile, Canada, Peru, Mexico Canada, China, India, Finland Greece Canada...Costs at the nearly completed Cerro Corona and Magistral projects in Peru rose 25% and 55%, respectively |
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