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Large size, low grade porphyries typically have 100 million toillion tonnes of ore withower grade 0.2 toopper. it is the size of these deposits that allow for bulk mining and economies of scale. long mine life the size of porphyry systems usually mean that the life of the mine can be multidecades long.
Online spatial data porphyry copper deposits of the world. information on porphyry copper deposits from around the world with grade and tonnage models,eneral classification based on geologic setting, mineralogy, with data allowing locations of.
Very little imperial porphyry was used during pharaonic egyptian period, such as small bowls and animalfigures that originated from wadi bould ers rather than quarrying klemm and klemm001635 and there is evidence that the quarrying happened during the ptolemaic period.
Porphyry copper deposits result from the complex interactions and feedbacks of many processes. owing to the complexity,uccinct definition that includes the essential attributes of this deposit class is elusive. consequently, this descriptive model usesorking definition oforphyry copper deposit.
This map is intended to help analyze laramide deformation and possible controls on the distribution of laramide porphyry copper deposits. preliminary reconstruction of miocene extension in the basin and range of arizona and adjacent areas with report and map, map scale 11,000,000. publication date 1994.
Porphyry copper deposits of the world. information on porphyry copper deposits from around the world with grade and tonnage models,eneral classification based on geologic setting, mineralogy, with data allowing locations of these deposits to be plotted using gis.
The term porphyry is also used forineral deposit calledopper porphyry.came from the one quarry at mons porpyritis6 porphyry mountainhe arabic jabal abu dukhan, which seems to have been worked intermittently between 29 and 335 ad.7.
Porphyry copper systems, zones of oxidation and secondary enrichment summary after d. briggs, d. sillitoe, m. barton, et al. jan 2022. introduction mineralization in porphyry systems is usually produced by hydrothermal solutions ascending from.
Production figures summarized for 45 porphyry copper deposits in the united states by titley and beane 1981 are 15.8 billion tons of copper ore production and reserves witheighted copper grade of 0.68 percent. fourteen deposits that reported molybde num hadeighted grade of 0.0325 percent molybdenum.
Copper mountain and ingerbelle, in porphyry deposits of the canadian cordillerap 365375 canadian institute of mining and metallurgy montreal. forster,.
Porphyry copper deposits are also important sources for other metals, including molybdenum, gold and silver. minor amounts of rhenium, tellurium, arsenic, zinc and platinum group elements are also present in elevated concentrations within these systems and are recovered at some mining operations.
Four deposits that are regarded as porphyry type have been identified in the precambrian shield of canada copper is mined from two of these, mcintyre.
Porphyry cu systems host some of the most widely distributed mineralization types at convergent plate boundaries, including porphyry deposits centered on intrusions skarn, carbonatereplacement, and sedimenthosted au deposits in increasingly peripheral locations and superjacent high and intermediatesulfidation epithermal deposits.
Arizonas porphyry copper deposits date back to 70 million years ago. intrusive activity and groundwater concentrated the copper and other metals below the ground. but, our dynamic planet moves things, and thanks to tectonic forces, weathering, and erosion, the rich metal deposits reached the surface millions of years later.
Deposit type porphyry copper deposit subtype cuau age ma 459.7 ma age determination method reos molybdenite age range 466.6 1.5, 459.7 1.4 ma, 450.8.
Potts and west 2008193 194 explain that the imperial quarries had similar andor overlapping chemical properties but the blackgreen quarries were marginally more distinguishable and their results were limited to provenancing most of the artefacts to the lycabettos quarry andase, in the ashmolean museum, to the rammius quarry.
Porphyry copper systems richard h. sillitoe 27 west hill park, highgate village, london n6 6nd, england abstract porphyry cu systems host some of the most widely distributed mineralization types at convergent plate boundaries, including porphyry deposits centered on intrusions skarn, carbonatereplacement, and sediment.
Fide deposit, the total amount of copper in evenediumsized porphyry copper deposit is much greater than in most massive sulfide deposits. this report summarizes current knowledge of porphyry coppermolybdenumtype deposits in the eastern united states and suggests more favorable areas for mineral ex ploration.
The meiduk porphyry copper deposit 55 1005 e, 30 25 10s located 45 km northeast of shahrebabak city, kerman province, iran. fig.hows geological map of the meiduk region hubner, 1969b, mars and rowan, 2006.the deposit is hosted by eocene andesitic and basaltic rocks, changing sequentially to conformable south dipping eocene red.