Iron oxide–copper–gold (IOCG) systems, initially defined following discovery of the giant Olympic Dam Cu–U–Au deposit (Fig. 3.12), comprise magmatic-hydrothermal deposits that: (1) contain economic Cu ± Au ± U grades; (2) are structurally controlled, commonly with breccias; (3) have abundant low-Ti iron oxides intimately associated with Fe–Cu …
Iron oxide copper gold ore deposits (IOCG) are important and highly valuable concentrations of copper, gold and uranium. IOCG represents a diverse variety of ore systems, formed in a variety of ...
An enrichment in nickel (Ni) or platinum group elements (PGE) is seldom observed in ores of the iron oxide–copper–gold (IOCG) type. This phenomenon is, however, known from a few deposits and prospects in the Carajás Mineral Province, Brazil. The Ni-PGE enrichment is explained, in part, by the spatial association of the IOCG …
The Central Asian Orogenic Belt (CAOB; Fig. 1 A) is situated between the Siberian plate to the north and the North China-Tarim block to the south, and is the world's largest Phanerozoic accretionary orogen. The northern margin of the East Junggar terrane is an important mineral province of the CAOB (Zonenshain et al., 1990).Various types of …
Iron oxide copper-gold (IOCG) deposits are major sources of Cu, contain abundant Fe oxides, and may contain Au, Ag, Co, rare earth elements (REEs), U, and other metals as economically important byproducts in some deposits. They form by hydrothermal processes, but the source of the metals and ore fluid(s) is still debated.
Iron oxide copper-gold (IOCG) deposits are a research focus of the current ore deposit geology, and have attracted much attention among the worldwide geologists and exploration experts due to …
The iron oxide copper-gold (IOCG) deposit model was initiated to help explain a series of somewhat disparate hydrothermal iron-oxide rich mineralization types (Hitzman et al., 1992).This has since been updated to be both inclusive and exclusive of a variety of mineralization styles (Williams et al., 2005, Corriveau, 2007, Groves et al., …
The Laoshankou deposit is an iron oxide-copper–gold (IOCG)-like deposit in the northern margin of East Junggar, Central Asian Orogenic Belt (CAOB), in which pyrite is ubiquitous and present from stage II magnetite mineralization (Py1a and Py1b), stage III-A pyrite mineralization (Py2a and Py2b), to s tage III-B chalcopyrite mineralization (Py3a …
Iron oxide-copper-gold (IOCG) deposits are one of the main sources of copper (Cu) and gold (Au) in the world [1] [2][3]. Since one of the world's greatest IOCG deposits was discovered at the ...
Iron oxide-copper-gold (IOCG) deposits are distinguished by higher copper grades than porphyry copper deposits (mostly > 1%) and wide range of low grade gold (Sillitoe, 2003). The grade gold in ...
Magnetite is the most important iron ore in iron oxide-apatite (IOA) deposits which represent the Cu-poor endmember of the iron oxide-copper–gold (IOCG) clan. Magnetite chemistry has been used as a petrogenetic indicator to identify the geological environment of ore formation and as a fingerprint of the source reservoir of iron.
Petrographic studies, assay records, and laser ablation–inductively coupled plasma–mass spectrometer (LA-ICP-MS) analyses of major sulfides suggest nearly all of the gold at the Ernest Henry Cu-Au deposit occurs in the form of native gold or electrum (95–65 wt.% Au); sylvanite and dissolved gold in cobaltite, chalcopyrite, and pyrite …
Geochemical Data Analysis of Iron Oxide Copper-Gold Mineralization, Wirrda Well Prospect, South Australia ... and host-rock signatures within an ore system, thus assisting in interpretation of ore deposit models and supporting exploration programs. ... contains higher-grade Cu-Au(± Bi-Ag) mineralization and has a marked Mo-W-U(± …
Australia is blessed with a wealth of mineral resources, and in terms of copper, the most famous deposit class present throughout the Australian continent would have to be Iron-Oxide-Copper-Gold (IOCG) …
Iron oxide-copper-gold (IOCG) deposits, defined primarily by their elevated magnetite and/or hematite contents, constitute a broad, ill-defined clan related …
Other related hydrothermal deposits, including what we could classify as Fe-Cu-Au skarn and iron oxide apatite deposits along the middle and lower Yangtze River …
Iron oxide-copper-gold (IOCG) deposits, defined primarily by their elevated magnetite and/or hematite contents, constitute a broad, ill-defined clan related to a variety of tectono-magmatic settings. The youngest and, therefore, most readily understandable IOCG belt is located in the Coastal Cordillera of northern Chile and …
The ore deposit at Grängesberg is of the apatite-iron oxide type and is considered by some to belong to the group of Iron-Oxide-Copper-Gold-deposits (IOCG, Corriveau 2007).These deposits are ...
The first step in oxide gold ore processing is the mining of the ore itself, followed by the primary crushing of the gold containing rocks. This step is important because it helps to simplify the material for further processing in other steps. The smaller ore pieces are then transported to a ball mill after the first crushing.
Many diverse ore systems are classified together as iron oxide copper-gold (IOCG) deposits based on an empirical definition arising primarily from geochemical features that do not specify tectonic setting, geologic environment, or sources of ore-forming fluid, metals, or other ore components. Such deposits have (1) Cu, with or …
Many diverse ore systems are classified together as iron oxide copper-gold (lOCG) deposits based on an empirical definition arising primarily from geochemical features that do not specify tectonic setting, geologic environment, or sources of ore-forming fluid, metals, or other ore components. Such deposits have (1) Cu, with or without Au, as …
Iron oxide-copper-gold (IOCG) deposits formed by magmatic-hydrothermal fluids (MH-IOCG) share many similarities with, but have important differences from, porphyry Cu ± Mo ± Au (porphyry) deposits: MH-IOCG deposits predominantly occur in Precambrian rocks, are Fe oxide rich, and have volumetrically extensive high …
Iron oxide copper-gold (IOCG) deposits proposed initially by Hitzman et al. (1992) are a new group of hydrothermal Fe-Cu deposits enriched in Fe, Cu, Au, U and REE. The research of IOCG deposits gained impetus following the exploration and subsequent identification of the Olympic Dam Cu-U-Au deposit in Australia in 1975.
of a number of the Australian examples of iron oxide copper (-gold) deposits. The larger iron oxide copper (-gold) deposits are listed in Table 1. Iron oxide copper (-gold) deposits are an emerging ore type of importance to the minerals industry, as illustrated by the recent discoveries of Sossego-Sequerinho and Crystalino in the Carajas region.
A continuum from iron oxide copper-gold to iron oxide-apatite deposits: Evidence from Fe and O stable isotopes and trace element chemistry of magnetite. …
The diverse group of iron oxide copper-gold (IOCG) deposits has been one of the most contentious classes of ore deposits since its recognition as a new type in the mid 1980s to early 1990s. Central to the debates have been the issues of definition, …
Each metallogenic epoch introduced its own deposit type(s), of which porphyry copper (and related skarn), followed by sediment-hosted stratiform copper and then iron oxide …
Many diverse ore systems are classified together as iron oxide copper-gold (IOCG) deposits based on an empirical definition arising primarily from geochemical …
Textural and compositional data of magnetite from Igarapé Bahia, Alemao, Sossego, Salobo, and Candelaria iron oxide copper-gold (IOCG) and El Romeral Kiruna-type iron oxide-apatite (IOA) deposits show that some magnetite grains display oscillatory zoning or have been reequilibrated by oxy-exsolution, coupled dissolution and …
they are iron oxide-rich variants of other deposit types. In this synthesis, IOCG deposits are considered a bona fide deposit type. Polymetallic deposits lacking significant iron oxides are not considered herein as IOCG deposits while hydrothermal monometallic, low-titanium magnetite and/or hematite iron deposits (i.e., iron as sole significant ...
Iron oxide-copper-gold (IOCG) deposits are a globally important but diverse group of hydrothermal ore deposits showing similarities to porphyry Cu-Au, sedimentary Cu and skarn deposits, reflecting variable fluid chemistry, links to intrusions and tectonic settings. ... (Guillong et al., 2008) was used for signal processing, …
Iron oxide copper–gold (IOCG) deposits contain economic or anomalous gold, and the gold distribution is important both for its economic significance and ore …
Iron oxide copper-gold (IOCG) deposits proposed initially by Hitzman et al. (1992) are a new group of hydrothermal Fe-Cu deposits enriched in Fe, Cu, Au, U and …
Iron oxide–apatite ore deposits are a key source of iron and contain a number of critical technology metals needed for the sustainable energy transition. This Review explores the hydrothermal ...
Iron oxide-copper-gold (IOCG) deposits are distinguished by higher copper grades than porphyry copper deposits (mostly > 1%) and wide range of low grade gold (Sillitoe, 2003).
