this report contains a revised descriptive model of porphyry copper deposits (pcds) the world's largest source (about 60 percent) and resource (about 65 percent) of copper and a major source of molybdenum gold and silver. despite relatively low grades (average 0.44 percent copper in 2008) pcds have significant economic and societal impacts due to their large size (commonly hundreds of
preliminary model of porphyry copper deposits byron r. berger robert a. ayus o jeff wynn and robert r. seal porphyry copper deposits result from the complex in teractions and feedback s of many
this report contains a revised descriptive model of porphyry copper deposits (pcds) the world’s largest source (about 60 percent) and resource (about 65 percent) of copper and a major source of molybdenum gold and silver.
porphyry copper deposits result from the complex interactions and feedbacks of many processes. owing to the complexity a succinct definition that includes the essential attributes of this deposit class is elusive. consequently this descriptive model uses a working definition of a porphyry copper deposit.
who were the red-haired giants of early north america wtf even more impressive were fossil deposits found by naturalist rex gilroy around bathurst. and blocks of porphyry covered with nbn co out to tame troublesome copper
nbn co ceo bill morrow has said that as the company shifts to the "multi-technology mix" model it will be crucial to ensure that issues over the
porphyry copper deposits are copper orebodies that are formed from hydrothermal fluids that originate from a voluminous magma chamber several kilometers below the deposit itself. predating or associated with those fluids are vertical dikes of porphyritic intrusive rocks from which this deposit type derives its name. in later stages