 | Vallejo, Cristian, Soria, Francisco, Tornos, Fernando, Naranjo, German, Rosero, Bayardo, Salazar, Fredy, Cochrane, Ryan (2016) Geology of El Domo deposit in central Ecuador: a VMS formed on top of an accreted margin. Mineralium Deposita, 51 (3) 389-409 doi:10.1007/s00126-015-0616-x | Journal (article/letter/editorial) | | ARTICLE Geology of El Domo deposit in central Ecuador: a VMS formed on top of an accreted margin Cristian...Paleocene–Eocene submarine arc rocks of the Macuchi Formation in central Ecuador. The mineralization includes massive...sphalerite, and chalcopyrite. Minor accumulations of galena, bornite, tennantite, stromeyerite, and proustite...Av. 10 de Agosto N37-232 y Villalengua, Quito, Ecuador 2 Geostrat SA, Av. República de El Salvador E9-10... de Los Shyris Edificio ONIX, Piso 10, Quito, Ecuador 3 Centro de Astrobiologia (CSIC-INTA), Torrejon |  | 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) | | Sulfide Deposit of La Plata, Western Cordillera, Ecuador M. CHIARADIA,† D. TRIPODI, L. FONTBOTÉ, Department... Isabel La Católica No. 882 y Cordero, Quito, Ecuador Abstract La Plata is, economically, the most important...sulfide (VHMS) deposits of the Western Cordillera of Ecuador, with preliminary estimated reserves of 840,000...Cordillera, it is hosted by the Early Tertiary Macuchi unit, which represents an oceanic island-arc sequence...pyrite, chalcopyrite, sphalerite, bornite, and galena, with minor tennantite and digenite. The gangue |  | | Journal (article/letter/editorial) | | depositsand metalliferousindicationsof the Republicof Ecuador. The principal classesof metallic mineral depositsare:...assemblages; letter positionis usedto identify positsof Ecuador (Wolf, 1892; Stoll, 1962; Goos- the principal minerals...program in are smaller inserts of Ecuador showingthe tectonic Ecuador, and one of the outcomesof this work...Figure 1, map of Ecuador,is an adaptationof lished1:500,000geological map of Ecuador(Goos- a metallogenic...metallogenic the minerals index map of Ecuador (Goossens, sensand Pico, 1969). On this map,metallicmineral occurrences |  | | 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 ...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...potashsalts or nitrate are so far unknown. In 1959 Ecuador produced18,449 Troy ouncesof gold, 162,607 Troy |  | 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...mineral deposits in southern, central, and northern Ecuador were dated by means of molybdenite Re-Os, biotite...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 |  | | Journal (article/letter/editorial) | | tonnages, as an open pit operation will typically mine large tonnages at lower grades, illustrating the...belt. Similarly, the VMS deposits of the Macuchi Belt in Ecuador are particularly rich in gold (Chiaradia...Quebec; Guha 1984; Guha et al. 1988; La Plata, Ecuador; Chiaradia et al. 2008; Iron King, Arizona; Creasey...(e.g., Skellefte District in Sweden and Macuchi Camp in Ecuador), with some deposits having an elevated...metals ratio (Boliden in Skellefte and Mercedes in Macuchi) located close to deposits with relatively low |  | | Journal (article/letter/editorial) | | residue (R) fractions of metasedimentary rocks of Ecuador (Paleozoic). The reported element concentrations...residue (R) fractions of mafic volcanic rocks of Ecuador (Eocene). The reported element concentrations (ppm)...metasedimentary rocks Ecuador slates (Fig. 2) Macuchi island arc sequence, Ecuador (Fig. 3) High-grade...High-grade metasedimentary rocks of Ecuador (Fig. 2) Coastal Catalonian batholith, Pataz batholith, San Vicente...of Paleozoic metasedimentary rocks of southern Ecuador, with metamorphic grade varying from anchizone |  | | Journal (article/letter/editorial) | | arc magmatism and associated mineralization in Ecuador Received: 28 January 2003 / Accepted: 31 August...Abstract Most of the economic ore deposits of Ecuador are porphyry-Cu and epithermal style gold deposits...signatures, of continental arc magmatic rocks of Ecuador of Eocene to Late Miocene (50–9 Ma, ELM) and Late...Escuela Politécnica Nacional, AP 17–01–2759, Quito, Ecuador Present address: M. Chiaradia Centre for Geochemical...geochemical signatures of Tertiary magmatic rocks of Ecuador from the ELM- to the LMR-type coincides chronologically |  | | Journal (article/letter/editorial) | | sources for the Estero Hondo alluvial gold mine, western Ecuador M. Potter and M. T. Styles Odin Mining...area of their Estero Hondo alluvial gold mine in western Ecuador by using gold characterisation studies...studies to support the opinion that the mine gold had been derived from two sources, not just one as originally...streams draining into the mine area and from productive gravel layers within the mine itself. Each sample was...estimates for the various gravel layers in the alluvial mine revealed that over half the gold was of PB-type |  | | Book | | . . . . . . . . 147 X Contents El Aguilar Mine: An Ordovician Sediment-Hosted Stratiform Lead-Zinc.... . . . . . . . . . . . . . . . . 279 Machcan Mine: A Pb-Zn Ore Deposit in Pucara Sediments of the... Contents Sulfur Isotope Studies in the Zinc-Lead Mine San Vicente, Central Peru H. Gorzawski, L. Fontbote...The Cu-Zn-Au-Ag Deposit of La Plata (Toachi), Ecuador R. W. Lehne . . . . . . . . . . . . . . . . . ... . . . . . . . . . . . . . . 413 The Agustina Mine, a Volcanic-Hosted Copper Deposit in Northern Chile |  | | Journal (article/letter/editorial) | | chalcopyrite and pyrite followed by sphalerite and galena, more distal barite and a large external aureole...spires are pyrite, chalcopyrite, sphalerite and galena with Mg-rich silicates, carbonates, anhydrite,...or in back arcs, are significantly enriched in galena. In some deposits pyrrhotite (rather than pyrite)...are relatively unmetamorphosed and undeformed, and mine plans and TE sections clearly show the mound morphologies...have an outer zone of chalcopyrite, pyrite and galena, with a sphalerite-predominant centre, and an orifice |  | Zhang, Ai-ping, Zheng, Yuan-chuan, Xu, Bo, Fu, Qiang, Ma, Wang, Wu, Chang-da, Zhang, Chi, Shen, Yang, Fei, Fan (2019) Metallogeny of the Lietinggang-Leqingla Fe–Cu–(Mo)–Pb–Zn polymetallic deposit, evidence from Geochronology, Petrogenesis, and Magmatic oxidation state, Lhasa terrane. Ore Geology Reviews, 106. 318-339 doi:10.1016/j.oregeorev.2019.02.004 | Journal (article/letter/editorial) | | alluvium covers areas in the south and north of the mine district (Fig. 2). The Lietinggang-Leqingla deposit...emplacing as stock and dikes in the southeast of the mine district (Fig. 2). The complex is mainly composed...(Fe–Cu) ore block, ore minerals are sphalerite, galena, chalcopyrite, magnetite, and pyrrhotite in decreasing...massive sphalerite and galena ore (Fig. 5G). In the disseminated ore, sphalerite, galena, and chalcopyrite...and is mineralogically dominated by sphalerite, galena, chalcopyrite, and abundant quartz and calcite |  | | Report (issue) | | be reported because they may not be economic to mine at the time they are explored. Balancing these...because mining concerns attempt to develop long-range mine plans now. It is also more common in recent years...sources listed in references) Deposit name Newmon Mine Allan (Johnson Lease) . Courtwright (Daggett Lease)...8) Skyline Mine Sunrise Toujours Gai White Feather Apex Darrington Gold Bug Claims Green Mine Helemar...Hoff Murphy Pillikin Shelly Sheppard Mine Simon Stafford Alice Mine Black Bow Claim (Avery) Blue Brush |  | | Report (issue) | | Norte Cty, CA Santa Helena, Antioquia, Colombia Goto Mine, Luzan, P.I. References Wells, F. G. et al 1946...vein/replacement deposits with chalcopyrite+sphalerite+galena+gold. Outermost zone may have veins of Cu, Ag,...table AuAg veins with CuSb sulfides Replacement galena sphalerite Quartz monzonite to granodiorite porphyry...nitemolybdenite; or pyrite-gold; or sphalerite-galena-gold-silver Metal Concentrations Mo, Cu, W, Ag...December 9, 1982 OF (REFERENCE) Sphalerite and galena in calc silicate rocks. GENERAL REFERENCE Einaudi |  | | Journal (article/letter/editorial) | | massive sulphide deposits from the same metallogenic province. In Dergamysh massive sulphides, the PGEs and...orebody from early pyritechalcopyrite to late barite-galena-sphalerite mineral assemblages. The same trend...island arc (Tatsumoto, 1969) and the Tertiary Macuchi island arc (Chiaradia and Fontboté, 2001). This...other VHMS deposits from the same metallogenic province, these authors argued that the Re-Os age reflects...rocks of the Early Tertiary Macuchi island arc (Western Cordillera of Ecuador). Econ. Geol. 96, 1361–1378 |  | Wang, Yinhong, Xue, Chunji, Liu, Jiajun, Zhang, Fangfang (2016) Geological, geochronological, geochemical, and Sr–Nd–O–Hf isotopic constraints on origins of intrusions associated with the Baishan porphyry Mo deposit in eastern Tianshan, NW China. Mineralium Deposita, 51 (7) 953-969 doi:10.1007/s00126-016-0646-z | Journal (article/letter/editorial) | | and emplacement of the granitic intrusions in the mine. Hydrothermal alteration Hydrothermal alteration...veins, with small amounts of chalcopyrite, pyrite, galena, sphalerite, and sericite. This stage is the main...associated with chalcopyrite, pyrite, sphalerite, and galena (Fig. 5d–f). Stage 4 is defined by barren veins...assimilation of mafic lower crust (Eocene Macuchi arc, Western Cordillera, Ecuador). Chem Geol 265:468–487 Defant...diagenetic mineralization in Baishan rhenium-molybdenum mine, East Tianshan. Acta Geol Sin 79:249–255 (in Chinese |  | Wang, Rongchao, Liu, Zhankun, Hollings, Pete, Zhou, Xin, Guo, Yongchao, Li, Bin, Yu, Miao, Yang, Bin, Mao, Xiancheng, Lai, Jianqing (2021) Fluid evolution of the Humedo porphyry-related gold deposit, southern Ecuador: Evidence from the boron isotope and chemical variations of tourmaline. Ore Geology Reviews, 128. 103894pp. doi:10.1016/j.oregeorev.2020.103894 | Journal (article/letter/editorial) | | Humedo porphyry-related gold deposit, southern Ecuador: Evidence from the boron isotope and chemical variations...Humedo porphyry-related gold deposit, southern Ecuador: Evidence from the boron isotope and chemical variations...porphyry 4 rocks in the Cangrejos–Zaruma district, Ecuador, northern Andes. The Humedo deposit, 5 with a...porphyry–epithermal system; 30 Humedo gold deposit; Ecuador 2 31 1. Introduction 32 Porphyry systems...Andes is the largest gold producing 46 region in Ecuador and hosts several porphyry Cu-Au and epithermal |  | | Journal (article/letter/editorial) | | largely of spha- lerite with minor patches of galena and in general terms constitutes a massive sulphide...clasts and fine disseminations of sphalerite and galena that are clearly derived from the explosive fragmentation...of the flat-topped hills in the vicinity of the mine are believed to be remnants of sheets of travertine...underlain both by Archaean crust of the Superior Province, locally with its Huronian sedimentary cover:...sufficiently frequent that efforts were made to mine them in their own right. (Remember that much of |  | Hodges, C.A., Cox, D.P., Singer, D.A., Case, J.E., Berger, B.R., Albers, J.P. (1984) U.S. Geological Survey-INGEOMINAS mineral resource assessment of Colombia. Open-File Report Vol. 1984 (84-345) US Geological Survey doi:10.3133/ofr84345 | Report (issue) | | Description Deposits of chalcopyrite, or sphalerite and galena in limestone altered to calc-silicate rock near...locally felsic composition are present. The Macuchi deposit in Ecuador (Stoll, 1962) is a well-explored example...heat sources. Coincidence of these features with galena, sphalerite, or barite occurrences and sulfide-rich...Stratabound deposits of massive to disseminated galena and other sulfides forming thin, sheetlike ore...prospecting for chromite deposits in CamagUey Province, Cuba: Geophysics, v. 22, no. 4, p. 848-869. ____ |  | | Book | | includes its relationship with the Cretaceous in Ecuador. The paper which follows, covering the tectonic...northern South America (Le., true continental slope province), little can be ascertained because of the obscuring...northern South American Cretaceous passive margin province. More westerly parts of Colombia, such as the...autochthonous South America extended all the way to Ecuador, (2) the stratigraphic sections of the Magdalena...ensialic arcs of Mexico/Chortis and Peru/southern Ecuador. All magmatism is restricted to the arcs as shown |  | | Journal (issue) | | ............. 51 Minerals from the Spring Creek Mine, near Wilmington, South Australia B. Beyer & P....well-crystallised globular crusts at the Mt Oxide mine, Queensland (Day and Beyer, 1996). ROCKBRIDGEITE...typelocality);Hagendorf Sud, Bavar:ia, and the Gold Quarry Mine, Nevada. At Wycheproof, meurigite occurs as yellow...mines of the Mt Isa District; Part 3 - the Mt Oxide mine. Australian Journal of Mineralogy, 2(1), 3-10. ...2, December 1996 Minerafsfrom the Spring Creek mine, near Wi[mington, South .9Lustraila Brian D. Beyer |  | | 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...7 Andean metallogenesis 9 Metamorphic rocks of Ecuador l0 Stratigraphical nomenclature 10 Metamorphic...15 16 17 18 19 Geomorphological framework of Ecuador 1 Location of the metamorphic/plutonic belts 4 |  | Holm, Robert J., Tapster, Simon, Jelsma, Hielke A., Rosenbaum, Gideon, Mark, Darren F. (2019) Tectonic evolution and copper-gold metallogenesis of the Papua New Guinea and Solomon Islands region. Ore Geology Reviews, 104. 208-226 doi:10.1016/j.oregeorev.2018.11.007 | Journal (article/letter/editorial) | | approximately 50 km northwest 219 of the Tolukuma mine. Sample JD15 (668956 9341950 UTM AGD66 zone 54S)...from the low-sulphidation epithermal Gold Ridge Mine, along the strike of 10 251 an arc-normal structural...hydrothermal systems in the area. 259 260 Gold Ridge Mine, Guadalcanal is hosted by a supra-crustal volcaniclastic... 264 found in association with chalcopyrite, galena, sphalerite, pyrite-marcasite, and arsenopyrite...Adularia bearing vein samples from the Gold Ridge Mine yielded 100% plateau ages 331 of 1.63 ± 0.05/0 |  | Hou, Tong, Zhang, Zhaochong, Santosh, M., Encarnacion, John, Zhu, Jiang, Luo, Wenjuan (2014) Geochronology and geochemistry of submarine volcanic rocks in the Yamansu iron deposit, Eastern Tianshan Mountains, NW China: Constraints on the metallogenesis. Ore Geology Reviews, 56. 487-502 doi:10.1016/j.oregeorev.2013.03.008 | Journal (article/letter/editorial) | | chalcopyrite + pyrrhotite + chlorite + quartz + calcite + galena + sphalerite, and (4) supergene stage: hematite...for the Cenozoic basalts in the Basin and Range province (Wang et al., 2002). Symbols and data source are...melting–assimilation of mafic lower crust (Eocene Macuchi arc, Western Cordillera, Ecuador). Chem. Geol. 265, 468–487. Clout...assemblage of the Birch–Uchi greenstone belt, Superior Province. Contrib. Mineral. Petrol. 139, 208–226. Hong...basaltic lavas of the British Tertiary volcanic province. Earth Planet. Sci. Lett. 50, 11–30. Woods, A |  | | Journal (article/letter/editorial) | | chalcopyrite, pyrite, pyrrhotite, sphalerite, galena, and wolframite. Gangue minerals include quartz...the Langfang Regional Geological Survey, Hebei Province, China. The handpicked zircons were examined under...the Langfang Regional Geological Survey, Hebei Province, China. Major oxides were determined by wavelength-dispersive... of mafic lower crust (Eocene Macuchi arc, Western Cordillera, Ecuador): Chemical Geology, v. 265, p...deposit and associated felsic intrusions in Yunnan Province, southwest China: Economic Geology, v. 106, p |
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