published reserves and resources of copper deposits in the united states-----f3 2. the sensitivity of u.s. copper reserves to economic conditions, in 1975 -----f7 3. total copper contained in typical
13 ok tedi porphyry / skarn copper-gold 29.1 14 sto. tomas ii (philex) porphyry copper-gold 20.3 ranked 3rd and 6th largest in the world rank deposit name deposit type moz au 1 ladolam (lihir) epithermal low-s veins 23.9 2 porgera epithermal low-s
porphyry cu deposits in china presently contain a total resource of 47 mt cu at average grades ranging mostly from 0.2 to 0.7 cu, accounting for 52 of cu reserve of china. in term of contained cu, 11 porphyry deposits are classified as giant (2.5 mt cu
ok tedis main ore body includes both porphyry and skarn ores. the skarn ores are very high grade, and supply approximately 50 percent of the contained ore reserves. junior mining companies with
the resource delineation and definition drilling at the ciresata gold-rich cu porphyry deposit has now been completed with approximately 37,200 metres drilled in 2011. assay results from the ciresata drilling program through drill hole rgd-41 have previously
the outcropping deposit lies less than 1km to the south of the golpu porphyry deposit area and hosts high-sulphidation epithermal mineralisation. wafi-golpu project reserves the golpu deposit is estimated to contain indicated and inferred resources of 823.8 million tonne (mt) graded at 0.70g/t gold, 1.25g/t silver and 1.05 copper.
lode au deposits that coexist with some late jurassic varie-ties, having a total au reserve of 1000 t (yang et al. 2003). the early cretaceous lode au deposits are generally com-posed of auriferous quartz-sulde veins variably associ-ated with disseminated ores
the world-class boddington deposit (total resources at 31 december 2010 of 1.53 gt grading 0.102 cu and 0.579 g/t au), in the saddleback greenstone belt of the southwest terrain of the yilgarn craton, is interpreted as a 2707 ma porphyry cu-au deposit
deposit type porphyry copper deposit subtype cu-au age (ma) 1.2 ma age determination method k-ar age range 1.2 ma 1990, ok tedi copper-gold deposits, in hughes, f.e., ed., geology of the mineral deposits of australia and papua new guinea
the porphyry-style resources that sit within the volumetrically dominant fubilan monzonite porphyry and not in their host magma and rapid formation of the ok tedi porphyry cu-au deposit, papua new guinea: lithos, v. 114, p. 282292. van dongen, m tion of
the fold belt contains the ok tedi porphyry copper-gold mine; porgera intrusive/ epithermal related gold mine, and kili teke porphyry copper-gold deposit. industry gold & silver
hydrogen and oxygen isotope analyses of sericites and kaolinites from four young porphyry copper deposits (ok tedi (1.2 ma) and yandera (6.5 ma), papua new guinea; koloula (1.5 ma), solomon islands; and waisoi (5 ma), fiji) indicate that the fluids from which these minerals precipitated were of mixed magmatic and non-magmatic sources.
the sum of reserves and past production yields an estimate of the total ore, total metal contained in ore, and average grade of ore originally in each of the deposits known in the united states. for most deposits, estimates of total copper in ore are low relative to the total copper in mineralized rock, and many estimates are strongly affected by the economic behavior of mining firms.
the u.s. geological survey completed the first-ever global assessment of undiscovered copper resources for the two most significant sources of global copper supply: porphyry copper deposits and sediment-hosted stratabound copper deposits. the geology-based study identified 236 areas for undiscovered copper in 11 regions of the world.
the largest copper reserves in the world were found in one particular country, with copper deposits that were larger than those in peru and australia
the 142 ma mujicun porphyry cumo deposit (fig. 2a), containing ore reserves of 20 mt at 0.4 wt cu and 0.052 wt mo, is the only large mesozoic porphyry cu deposit in the ncc; this deposit is related to a diorite porphyry stock beneath an andesitic to).
1.1. reserves and resources of the porphyry and skarn deposits of the cadia district 2 chapter 2 regional geology 2.1. reserves and resources of the principal late ordovician to early silurian gold-copper deposits of the macquarie arc. 22 chapter 33.13.2.
92 the three main categories of copper deposits are porphyry type deposits, strata-bound depos-its, and massive sulfide deposits.porphyry de- posits are the most common.they accountfor about 45 percent of the worlds total copper re-serves, including the
porphyry deposits are distributed along convergent plate tectonic boundaries such as in the circum-pacific region with the largest deposits found in south america, in particular chile, which accounts for about 29 of the worlds reserves (usgs around 6 of the
the ok tedi porphyry copper-gold deposit in western papua new guinea was discovered and tested by a subsidiary of kennecott copper corporation in 1968-1971. exploration lapsed in 1972-1975 while kennecott and the government of papua new guinea sought agreement on terms which would apply to any future mining operation.
the most straightforward way to elevate the oxygen fugacity of arc most cu porphyry deposits form at depths of 24 km, and are usually magmas is by the addition of oxidizing components to the mantle associated with epithermal deposits at shallow depths if not removed wedge or directly to the magmas.
the main ore deposits are porphyry-skarn-epithermal copper polymetallic deposits and magmatic hydrothermal vein deposits, and their metallogenic ages are from 170 to 12 ma. tibet has become the most important resource reserve base in china with large span of metallogenic ages, various types of deposits, complex metallogenic elements and good ore quality.
figure 3. reduced-to-equator total magnetic map of the survey area, showing locations of ok tedi porphyry copper-gold mine and the frieda river porphyry copper-gold prospect. the total magnetic intensity image of the area shows quite a few magnetic
flotation. mine life. 21 years (as of jan 1, 2020) serbia zijin copper has 4 copper mines (jm, vk, nc and ms) and 1 smelter plant. currently, serbia zijin copper is speeding up the technological upgrade and expansion of its 4 mines and smelter plant. after construction completion, it is expected that 120 thousand tonnes of mine-produced copper
mineral reserve estimate of 334 mt at a grade of 0.75 g/t au and 5.8 g/t ag per artemis gold inc. press release dated august 26, 2020 a number of mineral resources or significant occurrences disclosed herein relate to nearby properties owned by other companies, and the
the deposit comprises five ore zones with total au reserves exceeding 35 tonnes, with potential additional resources at depth. all vein-type orebodies are hosted by paleozoic volcanic rocks and comprise multiple vein sets 1100 cm in thickness.
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