Uranium transport in fclbearing fluids and hydrothermal. Minerals free fulltext the olympic cuau province, gawler. The occurrence of large, massive iron oxide deposits throughout the bushveld complex, south africa, and its associated roofrocks is well known. In particular, this usage does not restrict iocg to those deposits containing economic concentrations of copper andor gold cf. Textures and chemical compositions of magnetite from iron oxide coppergold iocg and kirunatype iron oxideapatite ioa deposits and their implications for ore genesis and magnetite classification schemes. Mcqueen crc leme, australian national university, canberra, act 0200 and school of rehs, university of canberra, act 2601. Many diverse ore systems are classified together as iron oxide coppergold locg deposits based on an empirical definition arising primarily from geochemical features that do not specify tectonic setting, geologic environment, or sources of oreforming fluid, metals, or other ore components. Figure 7 from iron oxide coppergold iocg deposits through.
Introduction ore deposits are crustal concentrations of useful elements that can be exploited at a pro. The fluorinefrich nature in iron oxidecoppergold iocg deposits has received much attention since it was recognized that the giant olympic dam od deposit contains 2 wt% fluorite. Iron oxide copper gold ore deposits iocg are important and highly valuable concentrations of copper, gold and uranium ores hosted within iron oxide dominant gangue assemblages which share a common genetic origin. The prominent hill iron oxidecoppergold iocg deposit, located in the gawler craton of south australia, contains ca. Figure 5 from iron oxide coppergold iocg deposits through. The occurrence of large, massive iron oxide deposits throughout the. Iron oxidecoppergold iocg deposits are characterized by abundant lowti iron oxide magnetite and hematite, pervasive hydrothermal alkali nacak alteration, and an extensional tectonic. Jan 01, 2016 iron oxide coppergold iocg deposits contain economic or anomalous gold, and the gold distribution is important both for its economic significance and ore genesis. The deposit type was first recognised, though not named as iocg, by discovery and study of the supergiant olympic dam coppergolduranium deposit, and south american examples. Many diverse hydrothermal copper deposits containing iron oxides are classified as iocg deposits. Volcanogenic massive sulfide ore deposit wikipedia.
Since the discovery of the supergiant olympic dam deposit in australia in 1975, iron oxide coppergold iocg deposits have become the largest producer of uranium hitzman and valenta, 2005, skirrow, 2011, the third producer of copper sillitoe, 2012 and significant producer of gold kerrich et al. Iocg workshop, feb 2006 geoscience australia outline 1. Iron oxide copper gold ore deposits are important and highly valuable concentrations of copper, gold and uranium. Pdf prominent hill is an iron oxide copper gold iocg deposit. The sga council offers a limited number of free subscriptions to. Replacement and vein deposits are usually found in a distinct zonal arrangement in the rocks surround ing a porphyry. The oreforming minerals that typically occur in porphyry and iocg deposits contain such elements as cu, au, ag, uranium u, zn, pb and light rare earth elements lrees. Temporal distribution of large 100 t resource iocg sensu stricto and iron oxide p, f, ree deposits in terms of the supercontinent cycle. The study area is the manganese deposits of vizianagramvisakhapatnam manganese belt of andhra pradesh. Alteration vectoring to iocgu deposits in frontier volcano. The youngest and, therefore, most readily understandable iocg belt is located in the coastal cordillera of northern chile and southern peru, where it is part of a volcanoplutonic arc of jurassic. Geology, geochronology, and hf and pb isotope data of.
An overview of the use of petrochemistry in regional exploration for volcanogenic massive sulphide vms deposits steve piercey. The iron oxide coppergold iocg group of deposits, initially defined following discovery of the giant olympic dam cuuau deposit, has progressively become. The manganese deposits of andhra pradesh are associated with a thick sequence of precambrian rocks, belonging to khondalite and charnockite groups of dharwar supergroup that forms part of 2500 to 3000 m. Ore deposit geology mapping closely to how ore deposit geology is now taught, this textbook systematically describes and illustrates the major ore deposit types, and links them to their settings in the crust and the geological factors behind their formation. The role of fluorine in hydrothermal mobilization and transportation. The iron oxidecoppergold iocg class of deposits is highly significant sources of these key metals and is a significant target for mineral exploration. Sep 17, 2003 iron oxidecoppergold iocg deposits, defined primarily by their elevated magnetite andor hematite contents, constitute a broad, illdefined clan related to a variety of tectonomagmatic settings. Iocg iron oxide copper gold ore deposits goes with porphyries as they are also loosely associated with a large felsic intrusions and form at moderate depths, unlike the dominantly tertiary porphyries iocgs tend to be much older and are generally protoizoic in age from 1. An overview workshop was run late on saturday 9 june, 2007 in copiapo, chile at the beginning of the andean segments of the tour to provide a context to the tectonic, geological and metallogenic setting of the iocg deposits of the andes and descriptions of other deposits in the region not on the itinerary. Only with adobe acrobat reader you can view, sign, collect and track feedback, and share pdfs for free. Volcanogenic massive sulfide ore deposits, also known as vms ore deposits, are a type of metal sulfide ore deposit, mainly copperzinc which are associated with and created by volcanicassociated hydrothermal events in submarine environments. The deposit type was first recognised, though not named as iocg, by discovery and study of the supergiant olympic dam coppergolduranium deposit olympic dam mine, and south american examples. Uranium transport in fclbearing fluids and hydrothermal upgrading of ucu ores in iocg deposits. Iron oxidecoppergold or iocg deposits can be of tremendous size.
Ironoxidecoppergold iocg deposits rank alongside porphyry deposits as some of the worlds largest deposits and most consistent in grade, making for highly profitable mines and therefore. The gold grades and tonnages of selected thirtysix deposits in some welldefined iocg provinces are compiled in this paper. For an uptodate text, the reader can consult the recent classic by robb introduction to oreforming processes. Textures and chemical compositions of magnetite from iron oxide coppergold iocg and kirunatype iron oxideapatite ioa deposits and their implications for ore. Olympic dam deposit in australia, ranks 1st in world uranium resources, 4 th in gold, and 4 in copper bhp billiton, 2006. Considering iocg u deposit generation in continental. Earth sciences copper evaluation copper metal fluorine compounds hematite hydrothermal fluids hydrothermal systems geology magnetite thermodynamics. A case study and implications for exploration marquardt, m.
Occurrence of manganese ore deposits and their mineralogy in. Such umineralizing systems include iocg, orogenic u deposits, and. Olympic dam is australias largest underground mine. Copper, in replacement ore bodies, may be within a few hundred metres of the intru sive leadzinc silver deposits farther out, and man ganese or goldsilver deposits may be on the outer fringes. Alteration vectoring to iocgu deposits in frontier. Pdf the imiter inlier at the eastern antiatlas chain morocco hosts a world class. These iocgu deposits tend to be hosted in modern or ancestral continental margins, as illustrated by the andean iocg deposits and current interpretation for the tectonic setting of the olympic dam deposit sillitoe.
Iron oxidecoppergold iocg deposits of australia geology. Sixteen common types of bedrock gold deposits are distinguished from one another and their main geological attributes are summarized. Nonetheless, guelb moghrein is an economically significant mineral deposit and an attractive exploration target. Iocg deposits are recognized as a distinct albeit varied deposit class in large part as a result of the discovery, development and study of the olympic dam cu au. Gawler iocg deposit gradetonnages in perspectivegawler iocg deposit gradetonnages in perspective 0. Iron oxide copper gold ore deposits wikipedia republished. The iron oxide coppergold iocg group of deposits, initially defined following discovery of the giant olympic dam cuuau deposit, has progressively become tooembracing when associated deposits and potential end members or analogs are included. The olympic cuau province also hosts a range of other iron oxidecoppergold iocg deposits including prominent hill and carrapateena. Iron oxide copper gold iocg deposits are considered to be metasomatic expressions of large crustalscale alteration events driven by intrusive activity. And when you want to do more, subscribe to acrobat pro. Mauritania hosts one significant coppergold deposit, guelb moghrein and several occurrences, which have been categorized as iron oxide coppergold iocg deposits but which are atypical in some important respects. Iocg mineralisation and alteration roger skirrow gawler project leader iocg workshop adelaide, 24 february 2006. Gold in iron oxide coppergold deposits sciencedirect. It is known that these elements are all detected in hematite as a principal mineral from iron oxidecoppergold iocg deposits carew, 2004.
Genetic models need to consider a number of different ore fluid components that may not all have the same source in an individual ore system, and also that economic iocg deposits may include examples in which key components especially copper had different sources. Pdf iron oxide coppergold iocg deposits through earth. The most commonly accepted periods following supercontinent assembly and prior to breakup are shaded and the relevant. In 2012, plans to expand the mine into an enormous open pit were put on hold. Pdf the imiter inlier at the eastern antiatlas chain morocco hosts a worldclass. Iron oxide coppergold deposits in the islamic republic of. Iron oxidecoppergold iocg deposits in south australia and queensland, australia. Mapping iron oxide cuau iocg mineral potential in australia using a.
Iron oxide copper gold ore deposits wikimili, the free. Indeed, porphyry and iocg deposits are among the largest mineral deposits in the world. The role of fluorine in hydrothermal mobilization and. These deposits are categorized as iron oxide copper gold iocg type, which typically contain magnetite. Iron oxide coppergold deposits iocg comprise a type of miner. Barton center for mineral resources, department of geosciences, university of arizona, tucson, arizona 85721, u. During the latter part of the phanerozoic, numerous iron oxidecuau iocg systems formed in parts of the cordillera of north and south america. Total copper and gold resources are plotted, with source of data in table a1 of williams et al. Geological and geochemical characteristics of the intrusion. Classification of iocg deposits into various types. Written for advanced undergraduate and graduate students with a basic background in. The fluorinefrich nature in iron oxidecoppergold iocg deposits. The style of mineralisation and the associated alteration exhibits many characteristics of iron oxidecoppergold iocg type deposits. However, the gold distribution in iocg deposits and its controlling factors remain unclear.
Porter geoconsultancy, continued its international study tour series of professional development courses during february 20 by visiting a representative selection of the different styles, and the most important examples, of iron oxide coppergold deposits of the gawlercurnamona craton in south australia and the eastern fold belt of the mount isa inlier in nw queensland. The book is in general very comprehensive, although it lacks any description of ironoxidecoppergold iocg deposits, the first of which olympic dam in south australia was discovered in 1976. Distribution of some recognised iocg deposits worldwide. Pdf iron oxide coppergold iocg mineralization at the imiter. There are similarities between the australian iocg deposits and those in wernecke in the yukon territory, canada.
The largest known deposit of this type is olympic dam, located 560 kilometres north of adelaide, south australia. Aug 07, 20 australias other iocg deposits, ernest henry and mount elliot, are located some 1900km north in the cloncurry district of northern queensland. With an tendancy for being tremendous in size, relatively simple metallurgy and. As suggested earlier, the quartz veins contain host rock residue as rutile. These iocg u deposits tend to be hosted in modern or ancestral continental margins, as illustrated by the andean iocg deposits and current interpretation for the tectonic setting of the olympic dam deposit sillitoe, 2003.
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