 | | 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...quartz-chalcopyrite veins and (type 8) chalcopyrite-anhydrite ± bornite veins with sericitic alteration halos...of diorite finger porphyries and the composite Teniente Dacite Porphyry. These units acted as effective...and anhydrite-carbonate ± gypsum (type 10) veins and breccias. These are abundant at shallow mine levels |  | | 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...6. Anhydrite is readily dissolvedand removedby acid meteoric waters. In deposits where anhydrite is an...mixing of the fluidswith coolmeteoricwater,or due anhydrite),phyllic (quartz, sericite,pyrite), argillic hydrothermal |  | | Journal (article/letter/editorial) | | zonation. Chlorite,K-feldspar, magnetite, and anhydrite, along with minor ruffle and apatite, are other...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... Area adjacent to mine porphyries Biotite-chlorite-K-feldspar-magnetite-anhydrite. Secondarybiotite |  | | 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 | | disseminating the information, the mine geologists and mine managers who have made the mine visits a rewarding experience...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...as the Upper Michigan Peninsula native copper province. Similarly, a metallogenic epoch can be as broad |  | | Book | | 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...to meet our needs rather than mine our own resources. Only if we mine U.S. copper will gold production...Oklo uranium mine, Republic of Gabon. This view not only shows a typical small open pit mine, but several |
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