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PORPHYRY COPPER MINERALISATION OF WESTERN USA Allan VIEPS, The University of Melbourne, Victoria 3010, Australia Porphyry copper deposits of western USA are very large low grade deposits dominated by disseminated Cu mineralisation but commonly with appreciable Mo and Au. Many deposits began as gold camps.
Copper ore grades of the Cuajone, Quellaveco, and Toquepala porphyry Cu(Mo) deposits, situated at 3,000 to 4,000 m on the Pacific slope of the Cordillera Occidental of south ernmost Peru (lats 17ø02'17ø15 ' S), have been markedly increased by supergene sulfide
Porphyry copper deposits (and their close relatives, porphyry molybdenum deposits) contain disseminated mineralization, meaning that a large volume of shattered rock contains a ramifying network of tiny quartz veins, spaced only a few centimetres apart, in which grains of the copper ore minerals chalcopyrite and bornite (or the molybdenum ore mineral molybdenite) occur with pyrite. 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 .
K–Ar dating demonstrates that all but eight of 41 dated porphyry copper and related ore deposits of Mexico were emplaced during the Laramide episode of maximum plate convergence. One older deposit ...
The final stage of alteration in a copper porphyry deposit occurs close to the surface and due to the presence of meteoric water producing oxidization.
Porphyry copperEdit. This process, which occurs primarily when fluids are driven off the cooling magma, is one of the main reasons for the existence in the world of rich, localized metal ore deposits such as those of gold, copper, molybdenum, lead, tin, zinc, rhenium and tungsten. This enrichment occurs in the porphyry itself,...
Jun 17, 2016· Myanmar is considered one of Asia's great unexplored mineral frontiers with yet to be realised potential for world class porphyry coppergold systems as well as a variety of styles of base metal and tintungsten mineralisation all contained within a central volcanic belt that stretches for over 1,000 kilometres.
produced several porphyry deposits such as the Sungun porphyry coppermolybdenum deposit in northwest as well as the SarCheshmeh porphyry copper deposit in southeast of Iran. The SarKuh porphyry copper deposit is located between the longitudes 55˚47'06˝ 55˚49'45˝ and latitudes 29˚55'28˝ 29˚57'05˝, 6 km southwestern of Sar Cheshmeh mine. SarKuh area is developed
Porphyry deposits are one of the most important sources of copper and molybdenum, and are also major sources of silver, gold, and tin. In addition, porphyry deposits may host valuable byproducts including platinum, palladium, and tungsten. Approximately 5060 percent of the world's copper, and 95 percent of molybdenum, comes from porphyry deposits.
Porphyry copper deposits comprise three broad types: plutonic, volcanic, and those we will call "classic". 1. Plutonic porphyry copper deposits occur in batholithic settings with mineralization principally occurring in one or more phases of plutonic host rock.
A spectrum of porphyrystyle deposits exists. Cerro Casale at Aldebarán shares many characteristics of porphyry copper deposits worldwide, whereas Verde at Refugio is a true porphyry gold deposit. Potassic alteration zones and Aveinlets are strongly developed at Cerro Casale, whereas they are absent at Verde. Banded quartz
The Mamut deposit of Sabah, East Malaysia, is a porphyry type CuAu deposit genetically related to a quartz monzonite ("adamellite") porphyry stock associated with .
Porphyry deposits may also host valuable byproducts, including platinum, palladium, and 5060 percent of the world's copper, and 95 percent of the world's molybdenum comes ...
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.
Apr 25, 2017· Japan Gold Announces Key Additions to Its Senior Management and Advisors ... the Whistler goldcopper porphyry deposit in Alaska; and the Santa Barbara gold‐porphyry deposit .
Read more about Geology of a major new porphyry copper center in the Superior (Pioneer) District, Arizona The southern Arizona copper fields [Part I] Tolman,, Jr., 1909, The southern Arizona copper fields [Part I]: Mining and Scientific Press, v. 99, no. 11, p. 356360.
with Ivanhoe Capital Canada to upgrade the Monywa Mine and to develop a new porphyry copper deposit at Letpadaung, about 1 1 km from the Monywa Mine. Ivanhoe Capital planned to conduct further exploration to ascertain ore reserves of the deposit. Ivanhoe Capital reportedly proposed to the Burmese Government to use solvent extraction and
These deposits are on the southern margin of the Tethyan Belt, but are related to the same subduction zone as the western AsiaPacific deposits in Indonesia. The Monywa project is currently being evaluated and developed jointly by the Myanmar Government and Ivanhoe Myanmar Holdings Ltd.
Porphyry copper deposits typically are large deposits and are mined mostly by open pit methods and can have byproduct production of gold, silver, molybdenum, and other metals. Other types of deposits, such as skarns and polymetallic veins can occur near the porphyry copper deposits.
The foundation of mineral deposit models is information about known deposits—the purpose of this publication is to make this kind of information available in digital form for a group of porphyry copper deposits. This publication contains a computer file of information on porphyry copper deposits .
Rapid formation of porphyry copper deposits evidenced by diffusion of oxygen and titanium in quartz Federico Cernuschi 1 *, John H. Dilles 1, Stephanie B. Grocke 2, John W. Valley 3, Kouki Kitajima 3, and Frank J. Tepley III 1
