 | | Journal (article/letter/editorial) | | Molybdenite Mineralization at the El Teniente Cu-Mo Porphyry Deposit, Chile Edward T. Spencer,1,† Jamie J...División El Teniente, Rancagua, Chile Abstract The El Teniente Cu-Mo porphyry deposit, Chile, is one...of diorite finger porphyries and the composite Teniente Dacite Porphyry. These units acted as effective...veins and breccias. These are abundant at shallow mine levels and show a close spatial relationship with...series of concentric faults associated with the Braden Breccia Pipe. Mineralization in this paragenetic |  | | Journal (article/letter/editorial) | | the Chilean porphyry copperdepositsin the E1 Teniente (Braden), Rio Blanco, and Los Bronces (Disputada)...following conclusions, thoughbasedon the study at E1 Teniente, Rio Blanco, and Los Bronces,may alsobe applicableto...distributionof Rb in rocksfroin the leachedcapping at E1 Teniente. Due to this immobility of Rb, weathering of the...coolmeteoricwater,or due anhydrite),phyllic (quartz, sericite,pyrite), argillic hydrothermal to adiabatic expansion...locations of E1 Teniente, Rio Blanco, and Los Bronces mines. Modified from Mapa Geo16gicade Chile, Instituto |  | | Journal (article/letter/editorial) | | distribution of Rb near porphyrycopperdepositsin Chile showthat: (a) Positive Rb anomaliesexist in rocks...rhyoliticporphyryintrusions. Disseminationsand stringers of pyrite with minor chalcopyriteand sphaleriteare commonin...pyroclastics.No sulrhyolite, chert, and, rarely, pyrite fragments. The fidesare seenin the hanging-wallsequence...consistsof a rhyolite mine its size and shape. lapilli tuff to tuff brecciahavinga pyrite matrix with insignificantbasemetal...Results massivesulfidebody composedof sphalerite,pyrite, Trend surfaceanalysisof the footwalldacitictuff |  | | Journal (article/letter/editorial) | | deposits--Utahcopper,Utah; Chino, New Mexico; Ray, Arizona, and Braden,Chilemshowmany similarities. At Bingham, stockworksand...zones,possiblydome-like,were removedby erosion. At Braden,primary mineralizationis a sulfidestockworkin andesiteflows...one part or anotherof the Bingham mine at Bingham, Utah, the Chino mine at Santa porphyrymineralizationsystem(James...James and others, Rita, New Mexico, and the Ray mine, at Ray, Ari- 1961). Therefore, diagrammaticinterpretationsof...ionsof zona;alsothe underground coppermine,E1 Teniente, someelementsof the Binghamporphyrysystemmay be |  | | Journal (article/letter/editorial) | | Panguna. The nature of the about 1 cm in dialneter. mine intrusives and their relationshipto both contem...grouped togetheras late, postperiod of intrusionin the mine region is considered tive assemblages K-silicate...selvagesco•nprisefrom most of total rock near •nine mine porphyries porphyriesto < 1% near outer limit of...when present. Kaverong Quartz Area adjacent to mine porphyries Biotite-chlorite-K-feldspar-magnetite-anhydrite...large parts of the intrusion Chlorite-epidote-pyrite-calcite-albite-K-feldspar; developedboth pervasivelyand |  | | Journal (article/letter/editorial) | | COMMUNICATIONS 451 rocksof the spilite-keratophyre suite. Pyrite with chalcopyrite, sphalerite andgalenain varyingproportions... Th• principalsulfidemineralsare chalcopyrite, pyrite, pyrrhotiteand pentlandite.Examples:The deposits...depositsin brecciapipesat Cananaea,Mexico; E1 Teniente (Braden), Chile. Group5. Massivesulfidedeposits, commonlyconcordant...idesare chalcopyrite,sphalerite, pyrrhotiteand pyrite. Examples:The depositsof the Noranda district,...native copper,chalcopyrite, chalcocite,bornite and pyrite in terrestriaMagoonal-marine sediments. This is |  | | Journal (article/letter/editorial) | | and hasa lower as a guide to ore at E1 Teniente (Braden), Chile [abs.]: K/Rb ratio relative to the original... and Billings, G. K., 1970,Rubidium: abundance Chile and produceenlargedtargetsfor mineral ex- Heier...containalternatingirregularbandsof quartz, sphalerite, pyrite,chalcopyrite, andcalqium or mag- 20km I nesiumcarbonate...trates. Nature of the hypo•Ienesulfideminerals The pyrite, in the mineralizedveins, is in the form commun...gangueminerals. In igin havebeenobserved. Replacementof pyrite by additionto this hypogenepyrite there are, in |  | | Journal (article/letter/editorial) | | containsestimated metallic mineralsinclude molybdenite,pyrite, and reservesof more than 300 million tons of approxi-...Recommended values for these standards larire,magnetite,pyrite, sphalerite, and molybdenite. were obtainedfrom...respectively, in altered andesitesassociatedwith the Braden porphyry copperdeposit. Althoughthe BethlehemJA..., 1971,Rubidiumas a guideto ore at E1 Teniente (Braden), Chile [abs.]: ECON.Gr.oI.., v. 66, p. 977. Brabec...Contributionsto the studyof volcanicand plutonicrocks of Chile: Unpub. Ph.D. thesis,University of Paris, 195 p |  | | Journal (article/letter/editorial) | | soon progressed to shallow depth, resulting in a mine. The numbers of mines and intensity of ACCEPTED...colonialism, modern economic booms (Belich, 2009). Active mine numbers and sizes skyrocketed during two World Wars...rapidly growing number of mineral discoveries and mine establishment was partly driven by the discovery...of conquests and non-military acquisitions. But mine importance and fame did not necessarily correspond...obsolete (for example, recent reserves of a mature mine only, or IP past production for a period of time) |  | | Report (issue) | | performed by the author and by F. Elsass and A. H. El Bazli. Copper, lead, zinc, gold, silver, nickel,... G. I. Seiner (USGS Computer Section), and A. H. El Bazli (USGS technician) is gratefully acknowledged...individual multiphase intrusions, constitute a tin province in which tin and niobium deposits are confined...studying three major porphyry copper deposits in Chile, Armbrust and others (1977) concluded that rocks...low K/Rb ratios. For example, at the El Teniente (Braden) mine, rubidium contents range from an average |  | | Book | | Orogen . 3 ¢ Radiometric Ages Near El Salvador and Potteriics, Chile . 4 ¢ Section Through Arequipa, Peru...Through Potrerillos, Chile . ; 6 ¢ Potash Index of Igneous Rocks, Atacama Rego Chile : 7 ¢ Michiquillay...Geology (Peru) . 8 © Structure at Chuquicamata, Chile . 9 ¢ Surface Geologic Map, Michiquillay 10 © Surface...Plutonic Belt, ies 27 @ Geology of the Kobuk-Koyukuk Province (Alaska). 28 © Interior Belt (Alaska). 3 ; ,...: tbe ge genes ie a Structure Visible in Gurr at El Nie : Structural Outline at Copper Basin. ; 48 ¢ |  | | Book | | Strategy at the College but also has taught Mine of Business Management at the College of Mines...Orebody at the Cyprus Pima Mine Ball Mills at Duval’s Sierrita Mine in Arizona The Converter Aisle...Jackling Belts at the Twin Bingham Buttes Mine in Arizona Mine in Utah 36 38 40 45 54 64 210 223 258 259)...Relative Costs of Operating an Independent Copper Mine 5.2 Capacities of the Copper Refineries in the... Area of North America Financial Model of a New Mine in an Underdeveloped Area 9.1 Output of American |  | | Report (issue) | | Geochemical and geophysical investigations around Garras Mine, near Truro. Cornwall 3 4 Molybdenite mineralisation...associated with the Skiddaw Granite near Carrock Mine, Cumbria 8 Investigation of stratiform sulphide...Scotland 38 10 Geophysical surveys around Talnotry mine, Kirkcudbrightshire, Scotland Geophysical evidence...samples (see Evans and others, 1980). Chalcopyrite-pyrite-molybdenite mineralisation, in disseminated, veinlet...shatter belt. The most abundant ore minerals are pyrite, chalcopyrite and molybdenite, occurring in quartz |  | | Book | | disseminating the information, the mine geologists and mine managers who have made the mine visits a rewarding experience...Accessory sulfide-group and oxide-group minerals (e.g., pyrite, arsenopyrite, magnetite, ilmenite), especially...concentration required to achieve the break-even point for a mine in terms of revenue and costs. Any detailed exploration...epochs. Following Tumeaure (1955), a metallogenic province may be defined as a mineralized area or region...The size of a metallogenic province can be as large as the Superior Province (Canadian Shield) or as small |  | | Book | | Formula Comments Apatite Ca 5 (PO 4 )J(OH,F) Pyrite FeS 2 Calcite CaCO 3 Magnetite Fe3 O4 Contains...charge of -2 (as in the lead ore galena, PbS). Pyrite (FeS 2 ) is a notable exception and is the most...used. Where high-grade ore occurs at some depth, a mine shaft may be sunk and drifts (tunnels) run from...setting, which may be referred to as a metallogenic province. The porphyry copper belt in the western part...North and South America is one such well-defined province, as is the sedimentary copper belt in Zambia-Zaire |
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Teniente Mine, El Teniente, Rancagua, Cachapoal Province, O'Higgins, Chile