 | Markowski, Agnès, Vallance, Jean, Chiaradia, Massimo, Fontboté, Lluìs (2006) Mineral zoning and gold occurrence in the Fortuna skarn mine, Nambija district, Ecuador. Mineralium Deposita, 41 (4) 301-321 doi:10.1007/s00126-006-0062-x | Journal (article/letter/editorial) | | gold occurrence in the Fortuna skarn mine, Nambija district, Ecuador Received: 24 February 2005 / Accepted:...gold skarn deposit is located in the northern part of the Nambija gold district, southern Ecuador. It has...which are named from north to south: Cuerpo 3, Mine 1, Mine 2, and Southern Sector. Massive skarn bodies...intrusion which crops out below the skarn bodies in Mine 2 and the Southern Sector. Endoskarn alteration...zone is centered on two 060° trending faults in Mine 2, where the highest gold grades (5–10 g/t) were |  | Chiaradia, Massimo, Vallance, Jean, Fontboté, Lluis, Stein, Holly, Schaltegger, Urs, Coder, Joshua, Richards, Jeremy, Villeneuve, Mike, Gendall, Ian (2009) U–Pb, Re–Os, and 40Ar/39Ar geochronology of the Nambija Au-skarn and Pangui porphyry Cu deposits, Ecuador: implications for the Jurassic metallogenic belt of the Northern Andes. Mineralium Deposita, 44 (4) 371-387 doi:10.1007/s00126-008-0210-6 | Journal (article/letter/editorial) | | geochronology of the Nambija Au-skarn and Pangui porphyry Cu deposits, Ecuador: implications for the...from the Nambija and Pangui districts of the Subandean zone, southeastern Ecuador. Nambija has been one...one of the main gold-producing centers of Ecuador since the 1980s due to exceptionally high-grade ores...discovered porphyry Cu–Mo district. The geology of the Subandean zone in southeastern Ecuador is dominated by the...Jurassic Zamora batholith, which intrudes Triassic volca- nosedimentary rocks. The Zamora batholith |  | 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) | | Origin of the Fruta del Norte Epithermal Gold-Silver Deposit, Southeastern Ecuador* Stephen Leary,1 Richard...South Australia 5000, Australia Abstract Fruta del Norte is a completely concealed and extraordinarily...gold-silver deposit located in the remote Cordillera del Cóndor mountain ranges of southeastern Ecuador. Currently...resource grade of 9.59 g/t Au and 12.9 g/t Ag. The deposit was discovered in early 2006 during a greenfields...of the Santiago Formation, which, along with the Zamora batholith and a series of porphyry copper stocks |  | Vallance, Jean, Fontboté, Lluís, Chiaradia, Massimo, Markowski, Agnès, Schmidt, Susanne, Vennemann, Torsten (2009) Magmatic-dominated fluid evolution in the Jurassic Nambija gold skarn deposits (southeastern Ecuador) Mineralium Deposita, 44 (4) 389-413 doi:10.1007/s00126-009-0238-2 | Journal (article/letter/editorial) | | evolution in the Jurassic Nambija gold skarn deposits (southeastern Ecuador) Jean Vallance & Lluís Fontboté... Abstract The Jurassic (approximately 145 Ma) Nambija oxidized gold skarns are hosted by the Triassic...Piuntza unit in the sub-Andean zone of southeastern Ecuador. The skarns consist dominantly of granditic garnet...Peru SAC, Av. La Floresta 497, Of. 301, Chacarilla del Estanque, San Borja, Lima, Peru A. Markowski Isotopengeologie...late veins and interpreted as basinal brines. Nambija represents a deep equivalent of the oxidized gold |  | Drobe, John, Lindsay, Darryl, Stein, Holly, Gabites, Janet (2013) Geology, Mineralization, and Geochronological Constraints of the Mirador Cu-Au Porphyry District, Southeast Ecuador. Economic Geology, 108 (1) 11-35 doi:10.2113/econgeo.108.1.11 | Journal (article/letter/editorial) | | Constraints of the Mirador Cu-Au Porphyry District, Southeast Ecuador JOHN DROBE,1,† DARRYL LINDSAY,2,* HOLLY...Cu-Au district is located in the southernmost sector of the northern Andean Cordillera, in Zamora-Chinchipe...Zamora-Chinchipe province, southeastern Ecuador. The district contains two significant porphyry Cu-Au ± Ag ± Mo...confirm a Middle Jurassic age for granodiorite of the Zamora batholith at this location (163.8 ± 1.9 Ma), and...unconformably overlie the south margin of the Mirador deposit, provided a minimum age constraint for Mirador |  | | Report (issue) | | 11 The metamorphic belts of Ecuador The metamorphic belts of Ecuador CQVer photograph Cerro Hermoso... OVERSEAS MEMOIR 11 The metamorphic belts of Ecuador M Litherland,] A Aspden and RAJemielita Keyworth...andjf.MIEl,ITA, RA. )994. The metamorphic belts of Ecuador. Overseas Memofr of the British Geologi-cal Survey...Hu1nan aspect 3 Access 3 Previous geological work 3 Mining history 4 Project operations 5 Reports and maps...7 Andean metallogenesis 9 Metamorphic rocks of Ecuador l0 Stratigraphical nomenclature 10 Metamorphic |  | 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) | | porphyry Cu and porphyry-related mineral deposits in Ecuador revealed by Re-Os, 40Ar/39Ar, and U-Pb geochronology...epithermal mineral deposits in southern, central, and northern Ecuador were dated by means of molybdenite Re-Os...rocks of a similar age, porphyry Cu deposits in Ecuador are frequently spatially associated with deeper-seated...B. Beate Escuela Politecnica Nacional, Quito, Ecuador e-mail: bbeate@uio.satnet.net Present Address:...majority of Miocene deposits occurs in southern Ecuador where areally extensive, post-mineralization (late |  | Van Thournout, F., Salemink, J., Valenzuela, G., Merlyn, M., Boven, A., Muchez, P. (1996) Portovelo: a volcanic-hosted epithermal vein-system in Ecuador, South America. Mineralium Deposita, 31 (4) 269-276 doi:10.1007/bf02280791 | Journal (article/letter/editorial) | | Portovelo: a volcanic-hosted epithermal vein-system in Ecuador, South America F. Van Thournout ~, J. Salemink... Quito, Ecuador '~Belgian TechnicalAssistance,c/o BelgianEmbassy,Casilla 532, Quito, Ecuador s Vrije...Portovelo epithermal vein-system in southwestern Ecuador has produced more than 120 tons of gold and about...quite typical of an adularia-sericite epithermal deposit. Spatially, the mineralization is arranged in three...magmatic water. The Portovelo deposit is located in southwest Ecuador (Fig. 1), about 100km from the |  | | Report (volume) | | color shaded relief aeromagnetic map of north-central Minnesota. Color changes represent broad changes...Tertiary calderas and regional extension of the east-central part of the Tintic-Deep Creek mineral belt, eastern...hydrothermal fluids in the Catheart Mountain Cu-Mo deposit, Maine By Robert A. Ayuso and Nora K. Foley......Structure and origin of the Ely copper deposit, east-central Vermont By Terry W. Offield, John F. Slack...geology and mineral deposits of the Berenguela district, northwestern Bolivia By Alan R. Wallace, Richard |  | | Journal (article/letter/editorial) | | 799-808 NOTES ON THE MINERAL RESOURCES OF ECUADOR W. C. STOLL INTRODUCTION The geologyof Ecuadoris...variouspetroleumcompanies that have worked in Ecuador. The metalliferous ore resources have been ...editedand published,in order to give publicityto the mining resourcesof the country. The presentreport is a...other data obtainedduring and after a visit to Ecuador in 1960 for the Organization of American states...goldandpetroleum, mininghasneverbeenof muchimportance in Ecuador. Gold was worked by the aboriginesbeforethe arrival |  | | Journal (article/letter/editorial) | | National Administration of Geologic Resources, del Sandy's , Carretera Masaya, 1, cuadra arriba, Managua... National Administration of Geologic Resources, del Sandy's, Carretera Masaya, 1 cuadra arriba, Managua...Nicaragua is the leading gold-producing country in Central America and the Caribbean Basin. Since the late...nevertheless, much of the country remains underexplored. Mining in Nicaragua dates back to the 16 th cen tury...the Rio San Juan to the southeast. At one time, mining was an important part of the economy; in the 1940s |  | | Journal (article/letter/editorial) | | ite-sphalerite-gold, (4) carbonate-quartz-stibnite-galena-silver, (5) quartz-stibnite-sphalerite,(6)...core of the Mondofiedo recumbent fold. In the central areas of modifiedby Alpine movements(Fig. 1). Geologyand...LISBOA STRUCTURAL ZONES CANTABRIAN WEST ASTURIAN CENTRAL IBERIAN OSSAMORENA SOUTH PORTUGUESE ANTIMONY ...metamorphosed to varyingdegrees,mainlyin cially in the Central Iberian zone, where the most the greenschistfacies...papers,notablyin Lotze (1950), example,the Ner6n mine in the SouthPortuguese Capdevilaet al. (1973), and |  | Montoya-Lopera, Paula, Levresse, Gilles, Ferrari, Luca, Orozco-Esquivel, Teresa, Hernández-Quevedo, Gabriela, Abdullin, Fanis, Mata, Luis (2020) New geological, geochronological and geochemical characterization of the San Dimas mineral system: Evidence for a telescoped Eocene-Oligocene Ag/Au deposit in the Sierra Madre Occidental, Mexico. Ore Geology Reviews, 118. 103195 doi:10.1016/j.oregeorev.2019.103195 | Journal (article/letter/editorial) | | evidence for a telescoped Eocene-Oligocene Ag/Au deposit in the Sierra Madre Occidental, Mexico Paula Montoya-Lopera...evidence for a telescoped Eocene-Oligocene Ag/Au deposit in the Sierra Madre Occidental, Mexico, Ore Geology...evidence for a telescoped Eocene-Oligocene Ag/Au deposit in 3 the Sierra Madre Occidental, Mexico. 4...17 18 The San Dimas district is a historical world class Ag/Au epithermal deposit 19 located in the...low to intermediate sulfidation Ag/Au epithermal deposit (quartz + 21 adularia + sericite type) developed |  | | Journal (article/letter/editorial) | | Vol. 96, 2001, pp. 1799–1826 The Candelaria-Punta del Cobre Iron Oxide Cu-Au(-Zn-Ag) Deposits, Chile ROBERT...Candelaria mine and a group of middle- and small-sized mines in the Punta del Cobre district, which is...located about 3 km northeast of the Candelaria deposit. Estimated geologic resources of the belt are on...by volcanic and volcaniclastic rocks of the Punta del Cobre Formation and, in places, also occur in volcaniclastic...control portions of the ore of the Candelaria deposit. Chalcopyrite is the only hypogene Cu mineral. |  | | Journal (article/letter/editorial) | | at: No. 19, Beitucheng Western Road, Chaoyang District, 100029 Beijing, P.R. China. E-mail address:...Several Mesozoic and Paleozoic IS deposits in the Central Asian Orogenic Belt imply great exploration potential...state sulfides such as pyrite, chalcopyrite, sphalerite, galena, and tetrahedrite/tennantite associations...indicator of the IS type; light-colored (Fe-poor) sphalerite is typical of IS deposits, consistent with relatively...Keywords: intermediate sulfidation; epithermal deposit; porphyry; subtype; arc; post-collisional 1. Introduction |  | | Journal (article/letter/editorial) | | chamber in the generation of the Platreef Ni-Cu-PGE deposit in the northern limb of the Bushveld Complex: A...2009 Structural analysis of the Velardeña mining district, Mexico: A faulted Au-Ag-rich hydrothermal...Hougou gold deposits, North China Craton (Hebei Province, China)—Nigel John Cook, Cristiana Liana Ciobanu...silicate and sulfide mineralization in the Vazante deposit, Brazi—M.S. Appold and L.V.S. Monteiro 96 Hydrothermal...mineralization—V. G. Voroshilov 1 The taloveis gold deposit in the precambrian Kostomuksha greenstone belt |  | Benavides, J., Kyser, T. K., Clark, A. H., Oates, C. J., Zamora, R., Tarnovschi, R., Castillo, B. (2007) The Mantoverde Iron Oxide-Copper-Gold District, III Region, Chile: The Role of Regionally Derived, Nonmagmatic Fluids in Chalcopyrite Mineralization. Economic Geology, 102 (3) 415-440 doi:10.2113/gsecongeo.102.3.415 | Journal (article/letter/editorial) | | 415–440 The Mantoverde Iron Oxide-Copper-Gold District, III Región, Chile: The Role of Regionally Derived...Terrace, London, United Kingdom SW1Y 5AN RICHARD ZAMORA, RAÚL TARNOVSCHI, AND BORIS CASTILLO** Anglo American...of northern Chile, the mines of the Mantoverde district exploit supergene oxide ore developed over several...geologic setting and genesis of this productive IOCG district are clarified herein through regional petrologic...g., Ferrífera), the deposits of the Mantoverde district were emplaced along the main and, more commonly |  | Chiaradia, M., Tripodi, D., Fontbote, L., Reza, B. (2008) Geologic Setting, Mineralogy, and Geochemistry of the Early Tertiary Au-Rich Volcanic-Hosted Massive Sulfide Deposit of La Plata, Western Cordillera, Ecuador. Economic Geology, 103 (1) 161-183 doi:10.2113/gsecongeo.103.1.161 | Journal (article/letter/editorial) | | Volcanic-Hosted Massive Sulfide Deposit of La Plata, Western Cordillera, Ecuador M. CHIARADIA,† D. TRIPODI...B. REZA SULTANA DEL CONDOR MINERA S.A., Isabel La Católica No. 882 y Cordero, Quito, Ecuador Abstract...sulfide (VHMS) deposits of the Western Cordillera of Ecuador, with preliminary estimated reserves of 840,000...(MORB)-type geochemical features likely indicating deposit formation in an intra-arc extensional environment...The main ore minerals are pyrite, chalcopyrite, sphalerite, bornite, and galena, with minor tennantite and |  | | Journal (article/letter/editorial) | | at the Delirio mine in its southern part, gold (4-6 g/t) until recently from its central part and mercury...mercury at the Azogues mine, formerly Chile’s principal mercury producer, in the northern part (McAllister...Fig. 1 Geological map of the Mantos de Punitaqui district, northern Chile, showing control of the vein by... 48, no. 4, 1998 Intrusion-Related Vein Gold Deposit 239 possess mineralogical similarities to Candelaria...as Punta del Cobre (in the same district as, and related to, the Candelaria copper-gold deposit) and Manto |  | | Journal (article/letter/editorial) | | R A N O S * Departamento de Tecnicas Geoldgicas del CIEMA T, 28040 Madrid, and *Departamento de Geologia...ore deposits of Vide de Alba and San Bias (Province of Zamora). These ore deposits are interstratified...ore deposits of Vide de Alba and San Bias (Province of Zamora), which were studied by Moro (1980), Moro...the middle-western zone of the province of Zamora. The Ambiciosa mine is 2 km SW of Vide de Alba, and...Mineralogical Society 310 L. Perez del Villar et al. M. Carmen mine is 1 km W of San Bias. Both ore deposits |  | | Report (issue) | | SURVEY CIRCULAR 1062 .r • San jose tin~silver mine at Oruro, Bolivia, where high-grade ores are hosted...-Soviet research on mineral deposits in the Noril'sk district is underway. Seventh Annual V.E. McKelvey Forum...represents an important center for the United States mining industry. Such an environment should enhance the...and exploration guides for a variety of mineral deposit types. Topics include discussion of significant...completed or in progress in Canada, Mexico, Venezuela, Ecuador, Bolivia, Peru, Chile, Argentina, Saudi Arabia |  | Rieger, A. A., Marschik, R., Diaz, M., Holzl, S., Chiaradia, M., Akker, B., Spangenberg, J. E. (2010) The Hypogene Iron Oxide Copper-Gold Mineralization in the Mantoverde District, Northern Chile. Economic Geology, 105 (7) 1271-1299 doi:10.2113/econgeo.105.7.1271 | Journal (article/letter/editorial) | | Oxide Copper-Gold Mineralization in the Mantoverde District, Northern Chile ANA A. RIEGER,1,† ROBERT MARSCHIK...Abstract The Mantoverde iron oxide copper-gold (IOCG) district, northern Chile, is known for its Cu production...carbonatization. A district scale Na(-Ca) alteration is absent. The IOCG mineralization in the district shows a...external sources. The Cu-Au ores in the Mantoverde district are low in U and have relatively low contents...δ34SVCDT. They show systematic variations within the district, which are interpreted to reflect relative distance |  | | Book | | Spanish-English, English-Spanish glossary of gem, mineral and mining terms. BY PAUL WILLARD JOHNSON Price $2.00 r...El Antimonio District Cananea District ...... Arizpe District ........... Nacozari District ...... Moctezuma...Moctezuma District ... Hermosillo District ... Alamos District ........ San Bernardo Area Alistos District...45 Sabinal District ............... Los Lamentos District.... Placer de Guadalupe Puerto del Aire District...Eulalia District....... El Potosi Mine............. San Antonio Mine....... Cusihuiriachic District..... |  | | Journal (article/letter/editorial) | | complexes and broadly coeval fault systems. Based on deposit morphology and dictated in part by lithological...larger, composite deposits (e.g. CandelariaPunta del Cobre) occur within volcano-sedimentary sequences...strongly supports a genetic connection of the central Andean IOCG deposits with gabbrodiorite to diorite...were not a requirement for IOCG formation in the central Andes, although metamorphic, seawater, evaporitic...magmatic ore fluid locally. The proposed linkage of central Andean and probably some other IOCG deposits to |  | Marschik, R., Singer, B. S., Munizaga, F., Tassinari, C., Moritz, R., Fontboté, L. (1997) Age of Cu(-Fe)-Au mineralization and thermal evolution of the Punta del Cobre district, Chile. Mineralium Deposita, 32 (6) 531-546 doi:10.1007/s001260050120 | Journal (article/letter/editorial) | | mineralization and thermal evolution of the Punta del Cobre district, Chile Received: 2 July 1996 / Accepted:...Accepted: 11 March 1997 Abstract The Punta del Cobre belt is located 15 km south of CopiapoÂ, northern Chile...Punta del Cobre and Ladrillos districts, east of the Copiapo river, and the Ojancos Nuevo district, with...Candelaria mine, and Las Pintadas district, west of the river. The mineralization in the Punta del Cobre belt...are hosted mainly in volcanic rocks of the Punta del Cobre Formation (pre-upper Valanginian) that underlie |
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