The discovery of the Boyongan porphyry copper deposit further enhance the mineral prospectivity of the region in targeting additional concealed copper ?gold deposits beneath or adjacent to known upper-level hydrothermal gold systems.
42.
The Oquirrh Mountains have been mined for gold, silver, lead, and most famously for copper, as home of the porphyry copper deposit at Bingham Canyon Mine, one of the world's largest open pit mines.
43.
The success of Utah Copper in mining the huge but low-grade porphyry copper type ore body at Bingham Canyon was based on Jacklin's 1904 decision to use open-pit mining, steam shovels and the railroad.
44.
The first phase of what is independently projected to be one of the world s largest porphyry copper and gold mines is under construction at Oyu Tolgoi and is expected to begin commercial production in 2013.
45.
At present, Surigao del Sur relatively ranks as lowest in potential for both epithermal gold and porphyry copper prospects among the provinces of the Region although its prospectivity may improve as exploration work progresses in the future.
46.
During 1890 to 1915, many smaller mines came to be established in addition to the major players in the field . the smaller mines were : the Sumdum Chief, the Crystal, Comet, porphyry copper ore extracted in the American southwest.
47.
:OK 78, if google translate hasn't completely misled me, you are talking specifically about the porphyry copper deposits within the Urumieh-Dokhtar magmatic belt, formed as part of the Kerman arc during the talk ) 09 : 41, 31 March 2011 ( UTC)
48.
IOCG deposits are classified as separate to other large intrusive related copper deposits such as porphyry copper deposits and other porphyry metal deposits primarily by their substantial accumulations of iron oxide minerals, association with felsic-intermediate type intrusives ( Na-Ca rich granitoids ), and lack of the complex zonation in alteration mineral assemblies commonly associated with porphyry deposits.
