 | Romero, Bárbara, Kojima, Shoji, Wong, Chilong, Barra, Fernando, Véliz, Walter, Ruiz, Joaquin (2011) Molybdenite Mineralization and Re-Os Geochronology of the Escondida and Escondida Norte Porphyry Deposits, Northern Chile. Resource Geology, 61 (1) 91-100 doi:10.1111/j.1751-3928.2010.00150.x | Journal (article/letter/editorial) | | Geochronology of the Escondida and Escondida Norte Porphyry Deposits, Northern Chile Bárbara Romero,1,2...University of Católica del Norte, 2Minera Escondida Ltd, Antofagasta, Chile and Department of Geosciences, University...the primary Mo-bearing mineral in the Escondida and Escondida Norte deposits were characterized using...occurrence of molybdenite are observed in the Escondida deposit: aggregates with Cu-Fe-sulfide minerals...35.2 ⫾ 0.2 Ma, respectively. Re-Os dating of Escondida Norte molybdenites also show two distinct episodes |  | | Journal (article/letter/editorial) | | 307–324 Geology of the Escondida Porphyry Copper Deposit, Antofagasta Region, Chile RUBEN A. PADILLA GARZA...Minera Escondida Limitada, avenida de la minera 501, Antofagasta, Chile Abstract The Escondida porphyry...porphyry copper deposit, located in northern Chile, was one of the two largest copper producers of the world...basement of the Precordillera de Domeyko province in northern Chile. We propose that the intrusive stock...stock associated with the mineralization at Escondida was emplaced in a tensional gash formed between sinistral |  | | 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...relevant discoveries are the porphyries at La Escondida, Escondida Norte, Zaldívar, Rosario and Ujina in the |  | | 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...BAYAS 64 I •5-31 18-15 ANGELINA 3' ½'*• I ß CHILE ?5 ø ,,,,)ARGENTINA ) 43.31 23 SanMiguel de |  | Riveros, K., Veloso, E., Campos, E., Menzies, A., Véliz, W. (2014) Magnetic properties related to hydrothermal alteration processes at the Escondida porphyry copper deposit, northern Chile. Mineralium Deposita, 49 (6) 693-707 doi:10.1007/s00126-014-0514-7 | Journal (article/letter/editorial) | | alteration processes at the Escondida porphyry copper deposit, northern Chile K. Riveros & E. Veloso & E...using magnetic methods. In the Escondida porphyry Cu deposit of northern Chile, each hydrothermally altered...Universidad de Atacama, Copayapu 485, Copiapó, Chile e-mail: karl.riveros@uda.cl K. Riveros : E. Veloso...0610, Antofagasta, Chile W. Véliz Minera Escondida Ltd, Avenida de la Minería 501, Antofagasta, Chile...and magnetic properties of the wall rock in the Escondida deposit. These magnetic methods can be considered |  | | Journal (article/letter/editorial) | | SUPERGENE WEATHERING IN THE EL PEÑÓN DISTRICT, NORTHERN CHILE IAN WARREN,† Yamana Gold, 9670 Gateway Drive, Suite...Peñón epithermal gold-silver deposit, Region II, Chile, comprises multiple epithermal veins, which contain...in the Paleocene metallogenic belt of northern Chile. Quartz-adularia-carbonate veins are hosted in Paleocene...by ages for vein adularia, hypogene alunite, and supergene alunite determined by Ar39/Ar40 step-heating...host rhyolite domes. Magmatic-hydrothermal quartz-alunite alteration spatially associated with Late Cretaceous |  | | 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...copper deposits (e.g. Chuquicamata and La Escondida; Figs. 1 and 2). The economic viability of these deposits |  | | Journal (article/letter/editorial) | | Porphyry Cu Magmatism in the EscondidaArea, Northern Chile* JEREMY P.RICHARDS? Department of EarthandAtmospheric...ized centers in theEscondida regionof northern Chile;alldatesarereported with errors.At theChimborazo...z porphyry intrusion.At theZaldfvar porphyry Cu mine,zirconandbiotitehavebeenanalyzed froma similars...AttheEscondida deposit, thereportedly synmineralization Escondida porphyry isdatedbyUPbat37.9ñ 1.1Ma,whereas thereportedly...singlepulseof synmineralization magmatism in the Escondida districtat -38 Ma, followed byminorlargelynonmineralizing |  | | 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 |  | | Journal (article/letter/editorial) | | this type at the porphyrycopperdepositat La Escondida,Chile, indicatesdeeperoxidationandleachingeffectsthan...of leachedcappinghasoccurredthroughoutmuch of the La Escondidadistrict. Geologic domainsdefinedby computedvaluesof...present metal distributionin the supergenesystemat La Escondida. Introduction present understandingof surficial...cm2. Since we are conButte, Montana, and La Escondida, Chile. These cerned with the principle of conservationof...consider the monzonite wall rock. In contrast, La Escondida, a concentrationof that element in each weathering |  | | Report (issue) | | 16.567–16.75 Z=3 X-ray Powder Pattern: Champion mine, California, USA. (ICDD 39-1361). 2.949 (100), 2...45 (1) Near Hawthorne, Nevada, USA. (2) Champion mine, California, USA; by electron microprobe, H2 O by...Pyrophyllite, kyanite, andalusite, lazulite, augelite, alunite, kaolinite, quartz. Distribution: From Hålsjöberg...(Horrsjöberg), Värmland, and at the Västanå mine, near Näsum, Skåne, Sweden. In the Novodmitrievsk...localities in Russia. In the USA, in the Dover andalusite mine, about 20 km northeast of Hawthorne, Mineral Co |  | | Book | | label: Aerial view of the Bingham Canyon copper mine, Kennecott Utah Copper, September 2003. Photo courtesy...and CopperGold Deposits at Los Pelambres, Central Chile José Perelló, Richard H. Sillitoe, Constantino...of the Río Blanco-Los Bronces District, Central Chile: Development of World’s Greatest Known Concentration...Northern Chile Geologic Overview of the Escondida Porphyry Copper District, Northern Chile Geology of...N. Moreto, André Luiz Silva Pestilho, Mineral Province, Brazil Gustavo Henrique Coelho de Melo, Marco |  | | 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) | | 2 EXPRESS LETTER HYPOGENE ALUNITE FROM THE EL SALVADOR DISTRICT, CHILE, INDICATES POTENTIAL FOR A BLIND...hypogene alunite that cement late breccia bodies from the El Salvador porphyry copper district of Chile were...were recently dated. One alunite sample over the principal Turquoise Gulch porphyry deposit has a 40Ar/39Ar...intrusion. Two other samples associated with quartz-alunite replacement of rhyolite, ~750 m southwest of the...returned Re-Os ages of 41.8 to 41.2 Ma. The two alunite samples from our study with coincident dates of |  | | Journal (article/letter/editorial) | | 271–305 Geologic Evolution of the Escondida Area, Northern Chile: A Model for Spatial and Temporal Localization...Cu deposits at Escondida, Zaldívar, and Chimborazo (Cordillera de Domeyko, northern Chile). The purpose...explain the giant scale of mineralization at Escondida and provide predictive tools for exploration in...intermediate to felsic Permo-Carboniferous volcanism (La Tabla Formation), and these rocks appear to constitute...throughout much of the porphyry belt of northern Chile. Geochemically, they are I-type in character, but |  | | Report (chapter) | | 9 Alunite-Jarosite Crystallography, Thermodynamics, and Geochronology R. E. Stoffregen AWK Consulting...Tsawwassen, British Columbia, Canada V4M 3L9 The alunite supergroup consists of more than 40 mineral species...solid-solution series considered in detail are alunite-natroalunite [KAl3(SO4)2(OH)6 − NaAl3(SO4)2(OH)6]...most abundant naturally occurring species of the alunite supergroup. Minerals with the generalized formula...two TO4 sites. Thus, within the supergroup, the alunite group consists of minerals in which both of the |  | | Journal (article/letter/editorial) | | SupergeneMetal Enrichmentat La Escondida, Atacama Desert, Northern Chile CHARLES 1•. ALPERS* AND GEORGE...leachedcappingof the porphyrycopperdeposit at La Escondida,Chile, permitsreconstruction of the paleohydrologic...gradesin surfaceexposuresand tops of drill holesat La Escondidaare significantlylower than actual copper...verticalprofilesindicatethat water table descentat La Escondidawasrelatively continuousin space,althoughnot...conclusions froma previousstudyof coppermassbalanceat La Escondida(Brimhall et al., 1985) which showedthat lateral |  | | Journal (article/letter/editorial) | | Colorado Porphyry Copper Deposit, I Región, Northern Chile FARHAD BOUZARI† AND ALAN H. CLARK Department of...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...middle Miocene, 14.59 ± 2.46 Ma; five samples of alunite-natroalunite mixtures, however, produced staircase...Incaic orogeny in northern Chile. An age of 35.26 ± 0.68 (2σ) Ma for alunite associated with hematite in |  | | 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:...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 |  | | Book (volume) | | existence o f a new unconformity-vein style uranium province in the Proterozoic of the Great Sandy Desert....Iran ian P o rp h y ry C u-M o-A u D eposits Brent LA. Mclnnes, Noreen J. Evans, Frank Q, Fut Steve Garwin...lm alyk (K a rm ak y r-D a ln e e ) and S au k b u la k C u-A u P o rp h y ry System s, U zbekistan IgorM...the largest deposits in any established porphyry province. For a discussion of the accepted terminology...localised in the U.S. “South-west”， and in northern Chile and southern Peru，and were Cu-Mo orebodies (Gilmour |  | | Journal (article/letter/editorial) | | associated with porphyry-Cu deposits, Atacama Desert, Chile: Elemental and isotopic constraints on water sources...porphyry copper deposit, Atacama Desert, northern Chile, to study waterporphyry copper ore bodies interaction...recovered elsewhere in the Atacama Desert of Northern Chile. In contrast, groundwaters recovered within and...Meigh et al., 1999). The Atacama Desert of northern Chile, the driest region on Earth, receives <10 mm/a rainfall..., 2003), ground and surface waters in northern Chile are highly variable in concentration of total dissolved |  | Leybourne, Matthew I., Cameron, Eion M. (2008) Source, transport, and fate of rhenium, selenium, molybdenum, arsenic, and copper in groundwater associated with porphyry–Cu deposits, Atacama Desert, Chile. Chemical Geology, 247 (1) 208-228 doi:10.1016/j.chemgeo.2007.10.017 | Journal (article/letter/editorial) | | associated with porphyry–Cu deposits, Atacama Desert, Chile Matthew I. Leybourne a,⁎, Eion M. Cameron b b a...(Spence) in the hyperarid Atacama Desert of northern Chile, which is buried beneath 30–180 m of Miocene piedmont...208–228 209 Fig. 1. Regional geology of northern Chile, showing major ore deposits in relation to the geologic...and the northeast-southwest dashed line is the Antofagasta– Calama lineament (ACL), as discussed in the...volcanic terrain and geothermal waters in northern Chile have elevated As concentrations, which contaminate |  | Masterman, G. J., Cooke, D. R., Berry, R. F., Walshe, J. L., Lee, A. W., Clark, A. H. (2005) Fluid Chemistry, Structural Setting, and Emplacement History of the Rosario Cu-Mo Porphyry and Cu-Ag-Au Epithermal Veins, Collahuasi District, Northern Chile. Economic Geology, 100 (5) 835-862 doi:10.2113/gsecongeo.100.5.835 | Journal (article/letter/editorial) | | Epithermal Veins, Collahuasi District, Northern Chile GLENTON J. MASTERMAN,†,* DAVID R. COOKE, RON F....located in the Collahuasi district of northern Chile. It comprises high-grade Cu-Ag-(Au) epithermal veins...has localized high-grade Cu-Ag-(Au) veins. At Cerro La Grande, similar high-grade CuAg-(Au) veins are hosted...synchronous with sinistral strike-slip deformation at La Grande. Hydrothermal alteration at Rosario is characterized...overprinted by structurally controlled quartz-alunite-pyrite, pyrophyllite-dickite, and muscovite-quartz |  | Fernández-Mort, A., Riquelme, R., Alonso-Zarza, A. M., Campos, E., Bissig, T., Mpodozis, C., Carretier, S., Herrera, C., Tapia, M., Pizarro, H., Muñoz, S. (2018) A genetic model based on evapoconcentration for sediment-hosted exotic-Cu mineralization in arid environments: the case of the El Tesoro Central copper deposit, Atacama Desert, Chile. Mineralium Deposita, 53 (6) 775-795 doi:10.1007/s00126-017-0780-2 | Journal (article/letter/editorial) | | Tesoro Central copper deposit, Atacama Desert, Chile A. Fernández-Mort 1,2 & R. Riquelme 1 & A. M. Alonso-Zarza...deposit located in the Atacama Desert of northern Chile. This deposit consists of two mineralized bodies...Católica del Norte, Avenida Angamos, 0610 Antofagasta, Chile 2 Departamento de Petrología y Geoquímica...V6C2X8, Canada 6 Antofagasta Minerals, Apoquindo 4001, piso 18, Santiago, Chile 7 GET, Université...Universidad de Atacama, Avenida Copayapu, 485 Copiapó, Chile Miner Deposita Introduction The Atacama Desert |  | Kidder, J.A., Voinot, A., Leybourne, M.I., Layton-Matthews, D., Bowell, R.J. (2021) Using stable isotopes of Cu, Mo, S, and 87Sr/86Sr in hydrogeochemical mineral exploration as tracers of porphyry and exotic copper deposits. Applied Geochemistry, 128. 104935pp. doi:10.1016/j.apgeochem.2021.104935 | Journal (article/letter/editorial) | | Cu–Mo porphyry and exotic prospect (Atacama region, Chile) were analyzed for major and trace elements, along...elements Stable isotopes Non-traditional isotopes Chile Atacama 1. Introduction The Picaron Cu–Mo porphyry...region’s hyper-arid desert climate in northern Chile (Fig. 1). A notable characteristic is thick accumulations...al., 2017; Riquelme et al., 2017). In northern Chile, the primary host for exotic mineralization is the...(Riquelme et al., 2017). Examples within northern Chile include Damiana, El Sal vador (Diaz Acevedo, 1996; |
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La Escondida Mine, Escondida, Antofagasta, Antofagasta Province, Antofagasta, Chile