 | | 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) | | 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...fold-thrust structures. Early K-feldsparâbiotiteâmagnetite (potassic) alteration was associated with pyrite...pyrite and chalcopyrite mineralisation. A quartzâmagnetite assemblage that occurs at depth has completely...Galeno-Michiquillay) and Au-rich (Minas Conga) deposits in the Cajamarca region are of similar age (earlyâmiddle Miocene) |  | | 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) | | 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 |  | | Journal (article/letter/editorial) | | plutons: deposits related to relatively reduced, magnetite-poor (and commonly ilmenite-bearing) intrusions...(Thompson et al., 1999), whereas those with oxidized, magnetite-bearing intrusions contain modest amounts of base...case in point is the Pataz-Parcoy belt in northern Peru (Fig. 2), which is assigned herein to the oxidized...Zamora belt, Ecuador Pataz-Parcoy belt, Peru CajamarcaHuaraz belt, Peru El IndioMaricunga belt, Chile FarallĂłn...FarallĂłn Negro district, Argentina Patagonian province, Argentina-Chile Au content (Moz)2 16 Preeminent |  | | 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) | | 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...Miocene. Bn, bornite; ccp, chalcopyrite; mag, magnetite; pyr, pyrite B200 Applied Earth Science (Trans...(bornite + chalcopyrite) and abundant hydrothermal magnetite. These deposits may also have a partially preserved |  | | Journal (article/letter/editorial) | | sanidine, phlopogopite, apatite, clinopyroxene, magnetite, and spinel lherzolite xenoliths, and probably...phlogopitetetraferriphlogopite, apatite, chromite-magnetite spinels, and accessory CaâTi, and REE, Zr oxides...B) 2011 VOL Exceptional CuâAu contents in magnetite: an exploration tool for a porphyry system A....enrichments of Cu and Au. In the core of the magnetite crystals Au and Cu contents can be up to 63 and...ultramafic lamprophyre emplacement in the alkaline province located 64uâ67uN in southern West Greenland, Lithos |  | 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) | | 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...the Miocene metallogenic belt of northern-central Peru (Sillitoe and PerellĂł 2005). Furthermore, the new |  | | Journal (article/letter/editorial) | | Ecuador-northern Peru (10) Central Peru (11) Southern Peruânorth-central Chile (12) Southeastern Peru-eastern...grade (% Cu) Mo grade (% Mo) Au grade (g/t Au) Magnetite (%) Depth (km) Cu-Au-Mo Cu-Mo 112 220 0.44...sources: Grades and tonnages, Singer et al. (2005); magnetite content and interpreted depths of emplacement...narrow (e.g., northern Philippines and northern Peru) as well as broad volcanic arcs (e.g., eastern Chile...the conjunction of Argentina, Bolivia, Chile, and Peru is covered by compiled geologic and metallogenic |  | | Journal (article/letter/editorial) | | 2 (2 logarithmic units above fO2 of fayalite-magnetite-quartz buffer), which enables the magmas to transport...representative of an upper crustal section that includes magnetite-bearing granitic rocks. The opening of the Sea...magmas have a reduced fO2, below FMQ (fayalite-magnetite-quartz buffer), continual upwelling of asthenospheric...rift, magma fertility, magma oxidation state, magnetite-series granitoids. 1. Introduction Many large...Cu deposits are known to contain magnetite. The occurrence of magnetite reïŹects a relatively oxidized parental |  | | 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...orthopyroxene and augite also occur, together with magnetite and ilmenite. Minor hornblende, quartz, and olivine...overgrowth of orthopyroxene or an orthopyroxene-magnetite symplectite. Hornblendes are also commonly corroded |  | 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) | | Cu-bearing intrusions have an average of fayalite-magnetite-quartz buffer (FMQ) +1.7 ± 0.7 (2Ï, n = 73), whereas...1,250 km long and is an important metallogenic province, containing over 13 past- and present-producing...plagioclase, quartz, biotite, hornblende, titanite, magnetite, zircon, and apatite (App. 1). The modality of...km) from the ore zones. Primary titanite and magnetite are common in all rocks of the Granite Mountain...1 mm long and 0.3 mm wide; Fig. 3F). Primary magnetite occurs as small euhedral cubes (up to 200 ÎŒm in |  | | Journal (article/letter/editorial) | | apatite, monazite, tourmaline, garnet, rutile and magnetite. From major and trace element studies, the granites...inferred to measured resources is primarily the province of geoscientists and is all about reducing uncertainty...Project, located in the Sindirgi Gold Corridor, a province which is host to other epithermal and porphyry...within the North Caribou terrane of the Superior Province, in northern Ontario, Canada. It is one of the...within carbonate and quartz veins, is hosted in magnetite-altered mafic volcanics. The differences in ore |  | Brown, T. J., Hetherington, L. E., Hannis, S. D., Bide, T., Benham, A. J., Idoine, N. E., Lusty, P. A. J. (2009) 2003-2007. World Mineral Production. British Geological Survey | Report (issue) | | Guinea; Pe1uPetro; Ministerio de Energia y Minas, Peru; Sociedad Nacional de Mineria Petroleo y Energia...007 565 269 ·1 000 778 241 · 1 000 414 Bolivia Peru (a) 2 432 616 3 036 465 5204 807 5 460 691 ...*250 2197 *250 2106 *250 677 Bolivia Chile (c) Peru 276 · 10 000 4640 168 · 10 000 3 037 120 ·10...Argentina Bolivia Brazil (d) Chile Colombia Ecuador Peru 6 934 1 851 57 452 229 ·2 400 2139 2906 2 762...Brazil Bentonite Chile Bentonite Colombia Bentonite Peru Bentonite Burma Bento nite (b) China Bentonite India |  | | Report (issue) | | STUDYOF GOLDPARTITIONING AMONGPYRRHOTITE,PYRITE,MAGNETITE,AND CHALCOPYRITE IN GOLD-SATURATED CHLORJDESOLUTIONSAT...(nickle-nickle oxide), and DMo= Dw = 0.4 at /J2 = MW (magnetite-wilstite, which is close to fJ 2 = GM). Figure...âąThe probabilityof minmalizlliaawilllllllplCt magnetite- wU lit (mod I S-type o ygen fugacity); Cl-complexed...Step 9: Refinement of the cooccntntion, in of magnetite. At lower oxygen fugacities, the the volatile...PRELIMINARYSTUDYOF GOLD PARTITIONINGAMONG PYRRHOTITE, PYRITE, MAGNETITE,AND CHALCOPYRITE IN GOLD-SATURATEDCHLORIDESOLUTIONS |  | | 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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