 | | Journal (article/letter/editorial) | | and hasa loweras a guide to ore at E1Teniente (Braden),Chile [abs.]:K/Rb ratio relative to the original... and Billings, G. K., 1970,Rubidium: abundanceChile and produceenlargedtargetsfor mineral ex- Heier...medium-grainedaggregatesof subhedral digenite,bornite,andcovellite;occasionalgrains ofto euhedralcrystalswhichare...beingmerely rimmedbyminerals,chalcocite,bornite,andcovellite(Figs. 3 theseminerals. The greaterintensityof...coppersulfidesand secalteration, southern Atacama desert,Chile: Inst. Miningondary sulfide enrichment: EcoN. G• |  | | Report (issue) | | Geochemical and geophysical investigations aroundGarrasMine, near Truro. Cornwall34Molybdenite mineralisation...associated with the Skiddaw Granite near CarrockMine, Cumbria8Investigation of stratiform sulphide...Scotland3810Geophysical surveys around Talnotrymine,Kirkcudbrightshire, ScotlandGeophysical evidence...Goethite and malachite are secondaryminerals, andcovellite rarely forms a thin rimaround chalcopyrite and...chalcopyrite (altered to gocthite, malachite and rarecovellite), scheellite and molybdenite. Country rock is |  | | Book | | Strategy at the CollegebutalsohastaughtMineof BusinessManagementattheCollege of Mines...Orebodyat the CyprusPimaMineBall Mills at Duval’s SierritaMine in ArizonaThe ConverterAisle...JacklingBelts at the TwinBinghamButtesMine in ArizonaMine in Utah363840455464210223258259)...Relative Costs of Operating an Independent CopperMine555759655.2Capacities of the Copper Refineries...Area of North AmericaFinancial Model of a NewMine in an Underdeveloped Area9.1Output of American |  | | Book | | Orogen .3 ¢ Radiometric Ages NearEl Salvador and Potteriics,Chile .4 ¢ Section Through Arequipa, Peru...Through Potrerillos,Chile.;6 ¢ Potash Index of Igneous Rocks, Atacama RegoChile :7 ¢ Michiquillay...Geology (Peru) .8 © Structure at Chuquicamata,Chile .9 ¢ Surface Geologic Map, Michiquillay10 © Surface...Plutonic Belt, ies27 @ Geology of the Kobuk-KoyukukProvince (Alaska).28 © Interior Belt (Alaska).3;,...tbege genesiea46 © Structure Visible in Gurr atEl Nie :47 ¢ Structural Outline at Copper Basin.; |  | | Book | | disseminating the information, themine geologists andmine managers who have madethemine visits a rewarding experience...concentrationrequired to achieve the break-even point for amine in terms of revenue and costs. Anydetailed exploration...epochs. Following Tumeaure (1955), ametallogenicprovince may be defined as a mineralized area or region...The size of a metallogenicprovince can be as large as the SuperiorProvince (Canadian Shield) or as small...as theUpper Michigan Peninsula native copperprovince. Similarly, a metallogenic epochcan be as broad |  | | Book | | used. Where high-grade ore occurs at some depth,amine shaft may be sunk and drifts (tunnels) run from...setting, which may be referred to as ametallogenicprovince. The porphyry copper belt in the western part...Northand South America is one such well-definedprovince, as is the sedimentary copper belt in Zambia-Zaire...to meet our needs rather thanmine our ownresources. Only if wemine U.S. copper will gold production...Oklo uraniummine, Republic of Gabon.This view not only shows atypical small open pitmine,but several |
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