Copper deposits definition of copper deposits by medical. A tectonic model for the spatial occurrence of porphyry. Quickly merge multiple pdf files or part of them into a single one. Copper has an atomic number of 29 and atomic weight of 63. Porphyry deposits are the worlds principal resources of cu, mo, and re, and are major. Intrusions associated with porphyry copper deposits intrusions associated with porphyry copper deposits are diverse but generally felsic and differentiated. Porphyry copper deposits result from the complex interactions and feedbacks of many. Chile has the worlds largest copper reserves of any country by far, with 200.
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. Location of the western pacific deposits discussed in this thesis 1. Part three resources and technology princeton university. In later stages, circulating meteoric fluids may interact with the magmatic. The predicted magnetic anomaly over a porphyry copper system 1. In its nongeologic, traditional use, the term porphyry refers to the purplered form of this stone, valued for its appearance. Thomson resources porphyry copper gold deposit model. The formation of porphyry copper deposits springerlink. Soda pdf merge tool allows you to combine pdf files in seconds. In porphyry copper deposits, copper grades can range from 0. Porphyry deposits are the worlds principal resources of cu, mo, and re, and are major resources of au and ag. Copper canyon porphyry copper deposit western mining history.
The i10 copper deposit is located along interstate 10 between benson and wilcox, arizona. Every year, the world consumes about 20 million tons of copper primarily for construction materials like electrical wiring and water pipes. The duluth complex in minnesota is one of the largest undeveloped mineral deposits in the world. The duluth complex is not a single layered igneous intrusion, e.
Regulus and southern legacy announce agreement to merge may 20, 2014, calgary, alberta regulus resources inc. The speciation of sulfur is controlled by oxygen fugacity. Pdfsam basic is free and open source and works on windows, mac and linux. Predating or associated with those fluids are vertical dikes of porphyritic intrusive rocks from which this deposit type derives its name. Merger rationale for personal use only creating a new copper play of scale. Copper is completely recyclable, however, with a large proportion of the copper mined throughout history still in use. To calculate the grade of copper for the sample, geologists use the equation. As a mining interested learner, the geology of porphyry copper deposits is vital to your education now in the first exploration geology course i discussed how because our current mining technology all the metals that we use. It is an element in group 11 of the periodic table, sharing many properties with silver and gold. They are commonly surrounded by deposits and country rock containing gold that is thought to have been derived from them jones, 1992. In silicate mineral deposits, the copper is linked with silicon and oxygen.
This free online tool allows to combine multiple pdf or image files into a single pdf document. Copper is more easily extracted from the suifide and carbonate m i nerals. If a deposit area has 200lbs of copper in 10,000lbs of ore rock, what is the grade. But while geologists have long recognized and exploited pcds, two new studies suggest they may need. Porphyry is a textural term for an igneous rock consisting of largegrained crystals such as feldspar or quartz dispersed in a finegrained silicate rich, generally aphanitic matrix or groundmass. Global miners snap up perus undeveloped copper deposits. Learn vocabulary, terms, and more with flashcards, games, and other study tools. This paper presents a brief history of the technological evo lution of southwest porphyry copper deposits as bulk lowgrade deposits and the evolution of knowledge of their settings, habits. Most nonrecycled supplies come from porphyry copper deposits pcds, which form when hot, metalbearing fluids percolate up through earths crust. Copper is a moderately incompatible chalcophile element.
Therefore, porphyry cu deposits are usually oxidized with oxygen fugacities. Pdf merge combine pdf files free tool to merge pdf online. Classes of copper deposits copper deposits are classified by general geologic setting, including the type of rock in which the copper deposit. Copper skarn deposits occur near many porphyry copper host intru sions that intruded carbonatebearing units einaudi and others, 1981, and skarn mineral zoning patterns may be useful in the targeting of a potentially associated porphyry copper deposit meinert and others, 2005. So this gives us a start in deciding where to focus our exploration because of the extensive subduction during the tertiary i. What investors need to know about porphyry copper deposits. Those in island arc settings have primitive strontium isotopic ratios 87sr86sr of 0. Copper is a chemical element in the periodic table with the symbol cu from the latin word cuprum, meaning metal of cyprus, where it was mined during the roman era. V are pleased to announce the signing of a binding agreement dated may 19, 2014 the agreement that provides for a merger of the two companies the merger. If you have ever visited the rest stop known as the thing and gazed into the valley to the east, you have seen the ground underlain by this deposit.
Porphyry copper deposits contain up to 100 t of gold and are among the largest reservoirs of gold in the upper crust kerrich et al. A free and open source software to merge, split, rotate and extract pages from pdf files. Both copper and coppergold deposits are present near the intrusive center, with goldsilver deposits outboard from these, and leadzincsilver deposits present in a distal concentric zone. Porphyry copper deposits are copper ore bodies that are formed from hydrothermal fluids that originate from a voluminous magma chamber several kilometers below the deposit itself. This report contains a revised descriptive model of porphyry copper deposits pcds, the worlds largest source about 60 percent and resource about 65 percent of copper and a major source of molybdenum, gold and silver. Porphyry copper gold deposit model porphyry deposits are the worlds most important source of cu and mo, and are major sources of au, ag, and sn. Porphyry ore deposits are the source of much of the copper, molybdenum, gold and silver used by humans. The i10 copper deposit, another arizona copper mine to be. Studies reexamine how major copper deposits form earth. Codes the australian research councils centre for excellence in ore deposit research, university of tasmania, private bag 126, hobart, tasmania 7001, australia. Porphyry ore typically forms in magmatic arcs above subduction zones.
Seal porphyry copper deposits result from the complex interactions and feedbacks of many. The problem is that while most of the magmas at convergent margins are highly oxidized, porphyry cu. Increased leverage to ongoing increases in the copper price. Significant quantities of byproduct molybdenum, silver, gold, and platinum are also produced. Exposure to immediate cash flows from the copper mountain mine. This information is compiled by dr bruce rohrlach and is not to be copied or reproduced in any form without written consent. The more than 4 billion tons of copper, nickel and precious metals have been here for millions of years, and weve known about them for more than 60. Porphyry copper deposits commonly contain hundreds of millions of metric tons of ore that averages a fraction of 1 percent copper by weight. The potential of goldrich porphyry deposits is underscored by the fact that onefifth of the worlds giant gold deposits, defined as those containing 600 all, are porphyry type. Preliminary model of porphyry copper deposits usgs. Porphyry copper deposit, large body of rock, typically a porphyry of granitic to dioritic composition, that has been fractured on a fine scale and through which chalcopyrite and other copper minerals are disseminated. The merger will result in the consolidation under one corporate structure of the assets of both companies, including the ownership of the little deer and whalesback copper deposits located in the springdale area of northcentral newfoundland and labrador, which are currently jointly owned on a. Here lets understand the geology of porphyries and iron oxide copper gold deposits or iocg as they are known. Information on porphyry copper deposits from around the world with grade and tonnage models, a general classification based on geologic setting, mineralogy, with data allowing locations of these deposits to be plotted using gis.
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