 | | Journal (article/letter/editorial) |
| distribution of Rb near porphyrycopperdepositsin Chile showthat: (a) Positive Rb anomaliesexist in rocks... The mineralized interval consistsof a rhyolite mine its size and shape. lapilli tuff to tuff brecciahavinga...surfaceanalysisof the footwalldacitictuff chalcopyrite,and galena. The base of the sulfide bodyis copperrich and...Potossic El i 386 Alteration of Docite of i I 200 I • ?•00 600 Porphyry I I 50 Teniente 100 ...the K/Rb ra- the rocks. Discussion Senecaand El Teniente deposit All of the 19 samplesfrom the Senecadepositcontain |
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| 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...mineralson sphaleritecausesloss cipal hypogenesulfides; galena, tetrahedrite, acan- of flotationselectivity duringthe...sulfideconcentrates.A. Sphalerite rimmed by chalcociteand galena. B. Chalcopyritegrain partially replacedby bornite...chalcocite. D. A smallcovellitegrain rimmedby supergene galena. Downloaded from https://pubs.geoscienceworld |
 | | 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) |
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| 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 ¢ |
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| 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 |
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| the sulfur has a charge of -2 (as in the lead ore galena, PbS). Pyrite (FeS 2 ) is a notable exception and...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 |
