 | Romero, BĂĄrbara, Kojima, Shoji, Wong, Chilong, Barra, Fernando, VĂ©liz, 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 BĂĄrbara Romero,1,2...University of CatĂłlica 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-sulïŹde minerals...35.2 â«Ÿ 0.2 Ma, respectively. Re-Os dating of Escondida Norte molybdenites also show two distinct episodes |  | | 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 |  | | Journal (article/letter/editorial) | | HYPOGENE ALUNITE FROM THE EL SALVADOR DISTRICT, CHILE, INDICATES POTENTIAL FOR A BLIND PORPHYRY COPPER...from the El Salvador porphyry copper district of Chile were recently dated. One alunite sample over the...deposits in the remote El Salvador district of Chile began with Old Camp in 1951 and the much larger...Domeyko Fa ult Sy 26 S stem Antofagasta 24 S Old Camp La Escondida(34, 32) 100 km M Gulch-Copper...Fig. 1. Lithology of the El Salvador district, Chile (Cornejo and Mpodozis, 1998) and locations mentioned |  | | Journal (article/letter/editorial) | | 271â305 Geologic Evolution of the Escondida Area, Northern Chile: A Model for Spatial and Temporal Localization...Cu deposits at Escondida, ZaldĂvar, 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 |  | | Journal (article/letter/editorial) | | SupergeneMetal Enrichmentat La Escondida, Atacama Desert, Northern Chile CHARLES 1âą. 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 |  | 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,â ,* 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...occurred somewhere beneath the Rosario and Cerro La Grande high-sulfidation vein systems and is supported |  | | 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 JosĂ© PerellĂł, Richard H. Sillitoe, Constantino...of the RĂo Blanco-Los Bronces District, Central Chile: Development of Worldâs Greatest Known Concentration...Northern Chile Geologic Overview of the Escondida Porphyry Copper District, Northern Chile Geology of...N. Moreto, AndrĂ© Luiz Silva Pestilho, Mineral Province, Brazil Gustavo Henrique Coelho de Melo, Marco |  | | Journal (article/letter/editorial) | | Colorado Porphyry Copper Deposit, I RegiĂłn, Northern Chile FARHAD BOUZARIâ AND ALAN H. CLARK Department of...the initiation of the Incaic orogeny in northern Chile. An age of 35.26 ± 0.68 (2Ï) Ma for alunite associated...Evidence from Cerro Colorado and elsewhere in northern Chile (e.g., Spence and Angelina) confirms that Paleocene...deposits of the younger belt, e.g., Chuquicamata and Escondida, resulted in stronger and more rapid enrichment...Cenozoic supergene metallogenic epoch in northern Chile, ca. 20 or even 30 m.y. in duration, which attained |  | | 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. âSouth-westâïŒ and in northern Chile and southern PeruïŒand were Cu-Mo orebodies (Gilmour |  | | Report (issue) | | Mountain (British Columbia, Canada) and El Teniente (Chile) porphyry copper deposits.........................deposits include El Teniente and El Salvador in Chile, Bajo de la Alumbrera in Argentina, Grasberg in Indonesia...regional faults such as near deposits in northern Chile (Behn and others, 2001; Gow and Walshe, 2005), central...much as about 100°C for samples from El Teniente, Chile. When binned in 10°C intervals, the median reported...in the El Teniente data is 380°â390°C. At Bajo de la Alumbrera, Argentina, Ulrich and others (2001) reported |  | | Journal (article/letter/editorial) | | Cu-AuandAu-AgMineralization in the PotrerillosDistrict, Chile TIMOTHYM. MARSH, âą AMT (USA), Inc., 7400 North Oracle...coarse-grained alunite(36.23+ 0.08 Ma) associated with diaspore, pyrophyllite, dickitc,and zunyitedemonstrates...GEOCHRONOLOGYOF CUAU& AUAGDEPOSITS,POTRERILLOS,CHILE 785 hypotheses: (1) the Cobreporphyry copperdeposit...Location mapof thePotrerillos districtin northern Chile,show- hydrothermally alteredareasin thePotrerillos...) coarse-grainedgranodioriteto quartz monzonite. La Tabla Formation-rhyolitictuffsand breccias, and andesitic |  | | Journal (article/letter/editorial) | | Porphyry copper deposits account for 60% of the world's mine production of copper and constitute 80% of ore reserves...SI SAI SAI SP 35. La Verde 36. Cananea SA Colombia 37. Mocoa X Peru 38. La Granja SA 39. 40....Mocho X 43. Quellaveco 44. Michiquillay X X X Chile 45. Cerro Blanco 46. Chuquicamata SAI X SAI S... 51. La Escondida SA SA 47. EI Abra Arsenopyrite c X SAI 33. Red Mountain Mexico 34. La Caridad...(Samame Boggio, 1980), Tintaya (Samame Boggio, 1980) Chile: Andacollo (Llaumett P. et al., 1975), 2 Los Pelambres |  | | Journal (article/letter/editorial) | | Surface over the El Salvador Porphyry Copper Deposit, Chile YASUSHI WATANABEâ Institute for Geo-Resources and...trace diaspore (including some areas rich in andalusite) and (2) muscovite with trace diaspore. There...alunite-(± aluminum phosphate-sulfate minerals)diaspore-zunyite-pyrophyllite-dickite, with residual muscovite...obtained from the samples with andalusite-muscovite-diaspore assemblage. This composition is close to that...surface over the El Salvador porphyry copper orebody, Chile (Fig. 1). Our goal is to better understand the zonation |  | | Book | | Radomiro Tomic Porphyry Copper Deposit, Northern Chile. Patricio Cuadra and Francisco Cam us.............Agua Rica Porphyry Cu-Mo-Au DepositïŒCatamarca Province, Northwestern Argentina. Part 1 : Exploration...Rosario Copper Porphyry Deposits, CoUahuasi District Chile. Claudio Bisso B, Manuel Durdn andAquiles Gonzales...a deposit, but rather the engineering ability to mine on a large scale at low cost, and simultaneously...all within the US "South west" and in northern Chile and neighbouring southern Peru. With the exception |  | | Book | | org/details/geologyofchile0000unse The Geology of Chile âą The Geologica l Society of London Books Editorial...T. & GIBBO, s, W . (eds) 2007 . The Geology of Chile. The Geological Society, London. CHARRIER, R., PINTO...the Andean Orogeo in Chile. Jn: MORENO, T. & GrnsoNs, W. (eds) The Geology of Chile. The Geological Society...Society, London, 21-114. The Geology of Chile EDITED BY TERESA MORENO Earth Sciences Institute 'J aume...\ii . Grosjean 13. Field excursion from central Chile to the Atacama De<,crt. W. Gibbons & -1. Moreno |  | | Journal (article/letter/editorial) | | Through the process known as acid rock drainage (or mine drainage), the oxidative dissolution is in this...complex outer layer of of sulfides from ores and from mine wastes can release air, water, biota, organic matter...supergene oxidation and leaching of ore deposits and mine wastes. They have a profound effect on high pressures...geochronologic studies. For overall viability of the mine. This has been the case since example, one could...Geology, FCFM, Universidad de Chile Plaza Ercilla 803, Santiago, Chile E-mail: mreich@ing.uchile.cl 2 |  | | Journal (article/letter/editorial) | | intrusive, including quartz, sericite, pyrophyllite, diaspore, aluminum-phosphates-sulfates (APS) and pyrite...lithocap composed of quartz, natroalunite, and minor diaspore and pyrophyllite. The APS minerals are Ca-Sr-Ba-Pb-rich...al. 1998), Maricunga, Chile (MUNTEAN & EINAUDI 2001), Nevados de Famatina, Chile (PUDACK et al. 2009)...dominated by quartz-dickite r pyrophyllite r diaspore, to sericitic (quartz-sericitepyrite) alteration...in several porphyry systems, e.g. El Salvador, Chile (WATANABE & HEDENQUIST 2001), Hugo Dummett, Mongolia |  | BendezĂș, Ronner, Page, Laurence, Spikings, Richard, Pecskay, Zoltan, FontbotĂ©, LluĂs (2008) New 40Ar/39Ar alunite ages from the Colquijirca district, Peru: evidence of a long period of magmatic SO2 degassing during formation of epithermal AuâAg and Cordilleran polymetallic ores. Mineralium Deposita, 43 (7) 777-789 doi:10.1007/s00126-008-0195-1 | Journal (article/letter/editorial) | | R. Spikings : L. FontbotĂ© Section des Sciences de la Terre, UniversitĂ© de GenĂšve, Geneva, Switzerland...including Chuquicamata, El Teniente, Butte, La Escondida, and Cerro de Pasco (OssandĂłn et al. 2001; Gustafson...Ligarda 2004). The historical ZnâPbâ(Ag) Colquijirca mine is located further to the north and has been an...(Fig. 3), though in some cases, pyrophyllite, diaspore, and zunyite are locally important (BendezĂș 2007)...aluniteâquartzâ sphaleriteâgalenaâpyrite ± (kaoliniteâdiaspore), is solely found in portions immediately adjacent |  | | Journal (article/letter/editorial) | | Cerro de Pasco Corporation. In the early 1970s, the mine was nationalized and was integrated into the state-owned...S.A., the current owner, took the control of the mine. Mineralization at Cerro de Pasco comprises two...495 496 38â36 Ma 32.9 Ma (porphyry stage) La Escondida, Late stage, Chile3 Collahuasi, Rosario vein...tetrahedrite; wf = wolframite 31â33 Ma Chuquicamata, Chile. Main stage veins (superimposed on early porphyry)3...has become possible because of recent extensive mine development in the eastern part of the open pit |  | | Journal (article/letter/editorial) | | February 2014 Article Hydrothermal corundum, topaz, diaspore and alunite supergroup minerals in the advanced...corundum-sericite-feldspar-, corundum-quartz-, and quartz-diaspore-topaz-APS minerals-pyrophyllite-sericite bearing...hydrothermal fluid. The disequilibrium assemblage quartz+diaspore+topaz (± pyrophyllite ï± sericite) formed between...present as pseudocubic crystals enclosed within diaspore and natroalunite. High level lithocaps include...mineralization. Key words: Hydrothermal corundum, topaz, diaspore, aluminum-phosphate-sulfate minerals, alunite |  | | Journal (article/letter/editorial) | | tabular or bladed pink alunite with dickite, diaspore, pyrophyllite and zunyite in the advanced argillic...Hokkaido, Japan, respectively. cristobalite, diaspore, dickite, goethite, halloysite, hematite, illite...Atacama Desert, northern Chile: Evidence from supergene mineralization at La Escondida. Geol. Soc. Amer. Bull...(1975) The porphyry copper deposit at E1 Salvador, Chile. Econ. Geol. 70, 857-912. Hayba D. O., Bethke P...Geology and K-Ar geochronology of the Paradise Peak mine and relationship of pre-Basin and range extansion |  | Juliani, Caetano, Rye, Robert O., Nunes, Carmen M.D., Snee, Lawrence W., CorrĂȘa Silva, Rafael H., Monteiro, Lena V.S., Bettencourt, Jorge S., Neumann, Rainer, Neto, Arnaldo Alcover (2005) Paleoproterozoic high-sulfidation mineralization in the TapajĂłs gold province, Amazonian Craton, Brazil: geology, mineralogy, alunite argon age, and stable-isotope constraints. Chemical Geology, 215 (1) 95-125 doi:10.1016/j.chemgeo.2004.06.035 | Journal (article/letter/editorial) | | high-sulfidation mineralization in the TapajoÌs gold province, Amazonian Craton, Brazil: geology, mineralogy...June 2004 Abstract The Brazilian TapajoÌs gold province contains the first evidence of high-sulfidation...TapajoÌsâParima (or VentuariâTapajoÌs) geological province consists of a metamorphic, igneous, and sedimentary...natroalunite, pyrophyllite, andalusite, quartz, rutile, diaspore, woodhouseiteâsvanbergite, kaolinite, and pyrite...shallow crustal levels, the discoveries in TapajoÌs province provide new perspectives for mineral exploration |  | | Journal (article/letter/editorial) | | geology During the Tertiary, the Rhodope metamorphic province in Bulgaria and Greece underwent a penetrative...(Sr-rich), plumbogummite (Pb-rich), florencite (Ce-, La-, or Nd-rich) and (d) the dussertite group (AsO4-dominant)...normal alunites and the absence of pyrophyllite and diaspore from the mineralization suggest a decline in temperatures...(Watanabe and Hedenquist 2001), Summitville, La Granja, La Escondida (Stoffregen and Alpers 1987), Valence Mountains...as was proposed for its formation in the Sungsan mine, Korea (Cho and Kim 1993). This oscillatory zoning |  | | Report (issue) | | «2. of the eccisemene of the Misima Gold-Silver Mine, Papua New Guinea ........ .G. I. Wilson and R....C. Barwick eae ie Discovery. The McLaughlin Gold Mine, Napa, Yolo, and Lake Counties, California Fre...At the other extreme are the discoveries of Escondida and Neves-Corvo, where sound understanding of...is arbitrary, because concepts have changed in mine was in production until the 1970s. Some indi- cations...with new discoveries, augmented geologic the Los mine (Cronstedt, 1754). The alloy was called knowledge |  | | Book | | 77 78 79 80 81 82 83 84 85 86 Cs Ba La Hf Ta W Re Os Ir Pt Au Hg TI Pb Bi Po...particular assemblage of deposit types. âą Metallogenic Province: a region characterized by a particular assemblage...MgSO4.7H2O Phosphates Xenotime â YPO4 Monazite â (Ce,La,Th)PO4 Apatite â Ca5(PO4)3(F,Cl,OH) Vanadates Carnotite...Los Pijiguaos Supergene/exotics El Salvador La Escondida/ Chuquicamata Carlin Skaergaard Hishikari El...be utilized in issues such as the control of acid mine drainage, and soil and erosion management. Mining |
|
