 | | Journal (article/letter/editorial) | | Supergene Orebody of the Cerro Colorado Porphyry Copper Deposit, I Región, Northern Chile FARHAD BOUZARI† AND...Ontario K7L 3N6, Canada Abstract The 51.8 Ma Cerro Colorado porphyry Cu(-Mo) deposit is situated at 20º...Cordillera Occidental. Supergene processes at Cerro Colorado generated a complex weathering profile that...5-percent-Cu hypogene protore. Dating of supergene alunite-group mineral separates from various ore facies...least 20 m.y. Fifteen multistep age spectra for alunite, natroalunite, and jarosite yielded acceptable |  | | Journal (article/letter/editorial) | | dredmetersof the 12 majorporphyrycopperdeposits in Chile was substantiated furtherby Alpersand Brimhall ...supergene alunitefromthe Eseondida porphyry copper province. Indeed,perhaps onlytwoof thesemajordepositsdeposit(Fig...Salvador(Gustafsonand Hunt, 1975) in northern Chile Chile,duringthe late Oligocene to earlyMioceneinterval...0361-0128/96/1809/164-1655.00 164 CHILEAN Cu PROVINCE: OXIDATION & ENRICHMENT in controlling anyagedifferences...3' ½'*• I ß CHILE ?5 ø ,,,,)ARGENTINA ) 43.31 23 SanMiguel de Tucum•n (CERRO CAMPANA)I:::•C |  | | Journal (article/letter/editorial) | | Porphyry Copper Deposit: The Cerro Colorado Hypogene Protore, I Región, Northern Chile FARHAD BOUZARI,†,* AND...supergene orebody of the Cerro Colorado porphyry Cu (-Mo) deposit, I Región, Chile, exhibits features not...each sulfide-depositing alteration episode at Cerro Colorado was generated by a pulse of high-temperature...near-surface environment. The initial alteration at Cerro Colorado plausibly developed under conditions similar...metasomatic exchange relationships in such systems. Cerro Colorado may, however, be representative of a subclass |  | | Journal (article/letter/editorial) | | between 17 and 27S across the forearc of northern Chile and southern Peru from 44 to 6 Ma, and on the Bolivian...directly dated (southern Peru and south of 26S in Chile) and suggest formation post 14 Ma. Sedimentological...is unlikely to be widely applicable in northern Chile. General models that involve climatic desiccation...Introduction The Central Andes, and in particular northern Chile, host some of the world’s largest porphyry copper...hyperaridity at 14 Ma in the Atacama Desert of northern Chile and southern Peru is not supported by sedimentological |  | Quang, C. X., Clark, A. H., W. Lee, J. K., Hawkes, N. (2005) Response of Supergene Processes to Episodic Cenozoic Uplift, PedimentErosion, and Ignimbrite Eruption in the Porphyry Copper Province of Southern Peru. Economic Geology, 100 (1) 87-114 doi:10.2113/100.1.0087 | Journal (article/letter/editorial) | | and Ignimbrite Eruption in the Porphyry Copper Province of Southern Perú CHAN X. QUANG, ALAN H. CLARK...extended northwestward through field mapping to the Cerro Verde-Santa Rosa district (ca. 16° 30' S). The 40Ar-39Ar...40Ar-39Ar incremental-heating dates of supergene alunite group minerals from the Angostura (38.1 and 38...38.8 Ma) and Posco (38.8 Ma) prospects and the Cerro Verde deposit (36.1–38.8 Ma) demonstrate that supergene...the late Oligocene (24.4–28 Ma natroalunite at Cerro Verde, 26–27 Ma natroalunite at Santa Rosa, and |  | Quang, C. X., Clark, A. H., Lee, J. K. W., Guillen B., J. (2003) 40Ar-39Ar AGES OF HYPOGENE AND SUPERGENE MINERALIZATION IN THE CERRO VERDE-SANTA ROSA PORPHYRY Cu-Mo CLUSTER, AREQUIPA, PERU. Economic Geology, 98 (8) 1683-1696 doi:10.2113/gsecongeo.98.8.1683 | Journal (article/letter/editorial) | | OF HYPOGENE AND SUPERGENE MINERALIZATION IN THE CERRO VERDE-SANTA ROSA PORPHYRY Cu-Mo CLUSTER, AREQUIPA...JORGE GUILLÉN B. Sociedad Minera Cerro Verde S.A., Asiento Minero Cerro Verde-Uchumayo, Avenida Alfonso...Casilla 299, Arequipa, Peru Abstract The contiguous Cerro Verde and Santa Rosa porphyry copper deposits are...dates of 61.8 ± 0.7 (2σ) and 62.0 ± 1.1 Ma for Cerro Verde, and 62.2 ± 2.9 Ma for Santa Rosa, representing...multiple analyses of a sample from Cerro Verde comprising alunite partially replaced by natroalunite |  | Cooper, Frances, Adams, Byron, Blundy, Jon, Farley, Ken, McKeon, Ryan, Ruggiero, Alberto (2017) Climate change, groundwater flow, and supergene enrichment in the Central Andes: insights from (U-Th)/He haematite geochronology. Applied Earth Science, 126 (2) 49-50 doi:10.1080/03717453.2017.1306239 | Journal (article/letter/editorial) | | eBHP Billiton, Copper Exploration, Las Condes, Chile c The western margin of the Central Andes has an...wetter [e.g. Chuquicamata, La Escondida, and Cerro Colorado; (Alpers and Brimhall 1988; Sillitoe and McKee...cessation of supergene mineralisation in northern Chile is of fundamental importance for our understanding...northern Chile by tracking the downward migration of the water table in the Cerro Colorado leached cap...Minerals and Mining and The AusIMM continuous at Cerro Colorado since at least ∼31 Ma, and was broadly commensurate |  | Bissig, Thomas, Lee, James K. W., Clark, Alan H., Heather, Kevin B. (2001) The Cenozoic History of Volcanism and Hydrothermal Alteration in the Central Andean Flat-Slab Region: New 40Ar-39Ar Constraints from the El Indio–Pascua Au (-Ag, Cu) Belt, 29°20′–30°30′ S. International Geology Review, 43 (4) 312-340 doi:10.1080/00206810109465016 | Journal (article/letter/editorial) | | Canada b Barrick Chile Ltda. , Barrio Industrial Late 58, Alto Penuelas, Coquimbo, Chile Published online:...HEATHER Barrick Chile Ltda., Barrio Industrial Late 58, Alto Peñuelas, Coquimbo, Chile Abstract Ninety-three...hypabyssal intrusions; (4) the 14-17 Ma, andesitic, Cerro de las T6rtolas Formation and its intrusive lithodeme...Formation; and (8) the recently defined rhyolitic 2 Ma Cerro de Vidrio Formation. Magmatic activity decreased...decreased markedly following the eruption of the Cerro de las T6rtolas Formation. Hydrothermal activity occurred |  | | Journal (article/letter/editorial) | | Desert deduced from geomorphology and supergene alunite-group minerals Thomas Bissig ⁎,1, Rodrigo Riquelme...Católica del Norte, Avenida Angamos 0610, Antofagasta, Chile a r t i c l e i n f o Article history: Received...evolution supergene alunite El Salvador Potrerillos geochronology stable isotopes Chile a b s t r a c t...t Supergene alunite group minerals from the Late Eocene El Salvador porphyry Cu district, the El Hueso...prospect located in the Precordillera of Northern Chile (~ 26 to 26° 30´ Lat. S) have been dated by the |  | | Journal (article/letter/editorial) | | Patagonia, Argentina: response to subduction of the Chile Ridge Richard H. Sillitoe 1 Received: 22 March 2018...2018 Abstract Radiometric ages for supergene alunite and jarosite effectively date the oxidation of...mineralization formed, and Pleistocene, K-Ar ages for alunite and jarosite from two widely separated and unusually...massif during early stages of subduction of the Chile oceanic-ridge spreading center at the Pacific margin...the Deseado massif and Atacama Desert of northern Chile was the result of Cenozoic uplift during progressive |  | | Journal (article/letter/editorial) | | ages of hypogene mineralization, and supergene alunite and jarosite provide ages for erosional and weathering...6±1.0 Ma at Llallagua. Fine grained supergene alunite (δ34S = –10.1 ‰) and jarosite yield K-Ar ages of...were active at those times. Keywords: K-Ar, age, alunite, jarosite, sericite, sulfur isotope, Oruro, Bolivia...part (Sugaki et al., 1981a). Several veinlets of alunite and jarosite are found in the deposits of this...latest stage products (Sugaki et al., 1981a). Alunite commonly occurs with halloysite and gibbsite in |  | | Journal (article/letter/editorial) | | Located in the northern part of the El Indio belt of Chile-Argentina, the 12.6-million ounce (Moz) gold, late...breccia and minor air-fall tuff of the middle Miocene Cerro de las Tórtolas Formation, which unconformably overlies...Miocene Frontera-Deidad paleogeomorphic surface. The Cerro de las Tórtolas Formation, deposited across the...Miocene 40Ar/39Ar ages between 11 and 10 Ma on alunite from the Filo Federico zone at Veladero and from...deposits at the northern end of the El Indio belt, Chile and Argentina (Fig. 1; Jannas et al., 1990, 1999; |  | Masterman, G. J., Cooke, D. R., Berry, R. F., Clark, A. H., Archibald, D. A., Mathur, R., Walshe, J. L., Duran, M. (2004) 40Ar/39Ar and Re-Os Geochronology of Porphyry Copper-Molybdenum Deposits and Related Copper-Silver Veins in the Collahuasi District, Northern Chile. Economic Geology, 99 (4) 673-690 doi:10.2113/gsecongeo.99.4.673 | Journal (article/letter/editorial) | | Copper-Silver Veins in the Collahuasi District, Northern Chile GLENTON J. MASTERMAN,†,* DAVID R. COOKE, RON F....Inés de Collahuasi SCM, Pedro Lagos 1090, Iquique, Chile Abstract The Rosario and Ujina porphyry Cu-Mo deposits...associated with the Domeyko fault system in northern Chile. At Rosario, fault-hosted Cu-Ag–rich massive sulfide...sulfide veins are associated with pyrophyllite-alunite-quartz altered rocks. The Rosario massive sulfide...Ujina deposits. The 40Ar/39Ar biotite, illite, and alunite dates (at 2σ error), and a Re-Os molybdenite date |  | | Journal (article/letter/editorial) | | of the Spence porphyry copper deposit, northern Chile, Rio Algom internal report. Rowland MG, Clark AH...the Spence porphyry copper deposit, II region, Chile, Abstract, Annual Meeting, Geological Society of...2011. Comments on the Cerro Colorado and Spence hypogene models, northern Chile, BHP Billiton internal...eBHP Billiton, Copper Exploration, Las Condes, Chile c The western margin of the Central Andes has an...wetter [e.g. Chuquicamata, La Escondida, and Cerro Colorado; (Alpers and Brimhall 1988; Sillitoe and McKee |  | | Journal (article/letter/editorial) | | Processes in the El Indio-Pascua Au-Ag-Cu Belt, Chile and Argentina THOMAS BISSIG,* ALAN H. CLARK,† JAMES...erosion surfaces of the Atacama desert of northern Chile and southern Peru, are considered to have formed...on supergene processes in the Andes of northern Chile and southern Peru has long been recognized (e.g...Indio-Pascua gold-silver-copper belt which straddles the Chile-Argentina frontier along the tectonic and physiographic...formed the geochronologic 971 972 BISSIG ET AL. Chile Antofagasta PE R U -C Puna Tucumán La Coipa |  | | Journal (article/letter/editorial) | | in the oxide zone of copper deposits in northern Chile: involvement of deep formation waters? Eion M. Cameron...deposits in northern Chile, whereas in similar deposits elsewhere, it is rare. In Chile, it has generally...Supergene enrichment of copper deposits in northern Chile extended over a long period, 44 to 9 Ma, being terminated...Keywords Atacamite . Copper deposits . Northern Chile Editorial handling: B. Lehmann E. M. Cameron (*)...Department of Geology, Universidad de Chile, P.O. Box 13518-21, Santiago, Chile e-mail: cpalacio@ing.uchile.cl |  | Tsang, Debbie P.W., Wallis, Simon R., Yamamoto, Koshi, Takeuchi, Makoto, Hidaka, Hiroshi, Horie, Kenji, Tattitch, Brian C. (2018) Zircon U–Pb geochronology and geochemistry of the Cerro Colorado porphyry copper deposit, northern Chile. Ore Geology Reviews, 93. 114-140 doi:10.1016/j.oregeorev.2017.12.019 | Journal (article/letter/editorial) | | and Geochemistry of the Cerro Colorado Porphyry Copper Deposit, Northern Chile Debbie P.W. Tsang, Simon...and Geochemistry of the Cerro Colorado Porphyry Copper Deposit, Northern Chile, Ore Geology Reviews (2017)...and Geochemistry of the Cerro Colorado 2 Porphyry Copper Deposit, Northern Chile 3 Debbie P.W. Tsang1...deposits; U– U–Pb geochronology; Northern 20 Chile; Timing of Magmati Magmatism agmatism; sm; Volcanism...examined cores extracted from Cerro Colorado, an 73 active PCD mine site that lies at the northern |  | Nelson, M., Kyser, K., Clark, A., Oates, C. (2007) Carbon Isotope Evidence for Microbial Involvement in Exotic Copper Silicate Mineralization, Huinquintipa and Mina Sur, Northern Chile. Economic Geology, 102 (7) 1311-1320 doi:10.2113/gsecongeo.102.7.1311 | Journal (article/letter/editorial) | | Mineralization, Huinquintipa and Mina Sur, Northern Chile MARK NELSON, KURT KYSER,† ALAN CLARK, Department...several Cenozoic porphyry Cu(-Mo) systems in northern Chile, is traditionally ascribed to the lateral migration...anthropogenic environments, including those of acid mine drainage (Johnson and Hallberg, 2003). Sillitoe...El Salvador porphyry copper deposits in northern Chile as relics of entombed microbes, supporting the inference... Münchmeyer, 1996) copper deposits in northern Chile. Because such carbon is released through selective |  | Corral, Isaac, Cardellach, Esteve, Corbella, Mercè, Canals, Àngels, Gómez-Gras, David, Griera, Albert, Cosca, Michael A. (2016) Cerro Quema (Azuero Peninsula, Panama): Geology, Alteration, Mineralization, and Geochronology of a Volcanic Dome-Hosted High-Sulfidation Au-Cu Deposit. Economic Geology, 111 (2) 287-310 doi:10.2113/econgeo.111.2.287 | Journal (article/letter/editorial) | | ECONOMIC GEOLOGISTS Vol. 111 March–April No. 2 Cerro Quema (Azuero Peninsula, Panama): Geology, Alteration... Geological Survey, Denver, CO 80225 Abstract Cerro Quema (Azuero Peninsula, southwest Panama) is a...maximum age of lower Eocene (~55–49 Ma) for the Cerro Quema deposit. It was probably triggered by the...fluid conduit outward) characterized by quartz ± alunite ± pyrophyllite ± dickite ± kaolinite ± illite,...hosted by epithermal (e.g., Cana, Santa Rosa, and Cerro Quema deposits; Woakes, 1923; Wleklinski, 1969; |  | Velasco, F., Herrero, J.M., Suárez, S., Yusta, I., Alvaro, A., Tornos, F. (2013) Supergene features and evolution of gossans capping massive sulphide deposits in the Iberian Pyrite Belt. Ore Geology Reviews, 53. 181-203 doi:10.1016/j.oregeorev.2013.01.008 | Journal (article/letter/editorial) | | Mesa (Riotinto); CM, Cueva de la Mora; CC, Cerro Colorado (Riotinto); CF, Confesionarios; HE, Herrerías;...mainly on oxidized exposures scattered across the province, confirm the importance of these outcrops. They...author studied the most economically significant Cerro Colorado deposit, at Riotinto. Kosakevitch et al. (1993...from massive sulphides and gossan in San Miguel mine; and Romero (2005) examined the dump and hardpans...mineralogy References Alto de la Mesa (Riotinto) Cerro Colorado (Riotinto) 1500 >1500 10 to 30 10 to 70 |  | | Journal (article/letter/editorial) | | Article Hydrothermal corundum, topaz, diaspore and alunite supergroup minerals in the advanced argillic alteration...natroalunite. High level lithocaps include natroalunite/alunite-kaolinite/dickite-pyrite bearing assemblages of...diaspore, aluminum-phosphate-sulfate minerals, alunite, porphyry-epithermal, Kassiteres-Sapes, Greece...quartzpyrophyllite at depth to predominant quartz-alunite and vuggy quartz at shallower levels where the...pyrophyllite, kaolinite-dickite, corundum, diaspore, alunite, topaz, tourmaline, dumortierite and aluminum- |  | | Report (volume) | | vein deposits located in the Cordillera Oriental, Cerro Rico de Potosi being the best example. After hundreds...technical assistance to private mine operators about mineral exploration, mine development and operation,...trained to provide technical assistance to private mine operators, as well as to conduct reconnaissance...personnel were to supply guidance to small private mine operators on management and bookkeeping, service...1959, when the program ceased to grant loans to mine operators, the small staff consisted of one geologist |  | | Journal (article/letter/editorial) | | and vanadocrete (vanadate). Panczner 1987 Tajo Mine, Hidalgo del Parral, Chihuahua, Mexico Panczner...svanbergite svanbergitewoodhouseite s.s.s alunite P-bearing alunite goyazite florencite florencitegoyazite...svanbergite alunogen aluminite alunite brochantite chalcantite gypsum alunite sulfate (plus APS minerals)...assemblage / ore type Primary mineralization Cerro de Pasco Peru Pb-Cu-Zn-Ag- tenorite Bi replacement/...Baumgarten et al. 2008 Dill et al. 1997a Cajamarca Province Peru Palache et al. 1951 Malpelo Island, Colombia |  | | Journal (article/letter/editorial) | | central Chile; A.J. Wilson, writ. commun., 2009) and Mo (2.5 Mt: El Teniente, central Chile; Camus, 2003)...El Teniente Mamut Grasberg-Ertsberg Ok Tedi Cerro de Pasco & Colquijirca Choquelimpie Esperanza Escondida...Escondida & Chimborazo Panguna Cerro Colorado Collahuasi dist. Bau Batu Hijau El Abra Cabang Kiri...to global-scale anomalies for Cu (e.g., northern Chile-southern Peru, southwestern North America) or Au...belt and an intra-arc fault zone: the northern Chile part of the central Andean middle Eocene to early |  | | Journal (article/letter/editorial) | | of Northern Chile Preface FRANCISCO CAMUS † Codelco-Chile, Huérfanos 1270, Santiago, Chile AND JOHN H...University, Corvallis, Oregon 97331 Introduction Chile is known worldwide as the site of one of the largest...production of more than 50 Mt of fine copper. Currently, Chile annually produces about 4.6 Mt of fine copper that...exploration efforts in the Central Andes with emphasis in Chile. During the past 25 years, exploration expenditures...subject of research by numerous individuals in Chile and elsewhere. The support of mining companies has |
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