40Ar-39Ar dating of Archean iron oxide Cu-Au and Paleoproterozoic granite-related Cu-Au deposits in the Carajás Mineral Province, Brazil: implications for genetic models

Pollard, P. J.; Taylor, R. G.; Peters, Lisa; Matos, Fernando Martins Vieira; Freitas, Cantidiano; Saboia, Lineu; Hühn, Sérgio Roberto Bacelar

doi:10.1007/s00126-018-0809-1

Cited by 29 publications

(23 citation statements)

References 56 publications

(119 reference statements)

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“…Breccias also host the Igarapé Bahia (including Alemão) Cu-Au-Fe deposit near the Carajás Fault ~25 km south of the Salobo deposit, where breccia fragments and Cu-sulfidic matrix in some cases exhibit a tectonic foliation (Ronzê et al, 2000). Pollard et al, 2019). These ages overlap with the ~1880 Ma ages of several A-type granites identified in the Carajás Domain (Machado et al, 1991;Moreto et al, 2015b), although a close spatial association (e.g.…”

Section: Carajás Province Brazil -Neoarchean Cu-au-fe and Paleoproterozoic Cu-au Depositssupporting

confidence: 59%

“…Cristalino, Sossego) commenced at ~2720-2680 Ma whereas in the Northern Copper Belt (including Salobo and Igarapé Bahia) the available data indicate a major Cu-Au event at ~2580-2535 Ma (Fig. S1; Re-Os molybdenite and U-Pb monazite, titanite, zircon ages - Machado et al, 1991;Requia et al, 2003;Tallarico et al, 2005;Moreto et al, 2015aMoreto et al, , 2015bPollard et al, 2019). Many deposits also record younger U-Pb and 40 Ar- 39 Ar ages (e.g.…”

Section: Carajás Province Brazil -Neoarchean Cu-au-fe and Paleoproterozoic Cu-au Depositsmentioning

confidence: 98%

“…S1; e.g. Alvo 118, Estrela, Sossego-Curral, Breves, and Gameleira deposits - Tallarico et al, 2005;Moreto et al, 2015aMoreto et al, , 2015bPollard et al, 2019). Although many of these relatively small Paleoproterozoic Cu-Au deposits were initially described as IOCG deposits, Pollard et al (2019) noted their anomalous B-Be-Bi-Li-Sn-W geochemistry and distinguished these Fe-oxide-poor, quartz ± carbonate-rich deposits as separate in origin from the Neoarchean IOCG deposits and proposed a magmatichydrothermal derivation related to A-type granites of overlapping age.…”

Section: Carajás Province Brazil -Neoarchean Cu-au-fe and Paleoproterozoic Cu-au Depositsmentioning

confidence: 99%

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Iron oxide copper-gold (IOCG) deposits – A review (part 1): Settings, mineralogy, ore geochemistry and classification

Skirrow¹

2022

Preprint

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Characteristics of ten of the world's metallogenic provinces hosting iron oxide Cu-Au (IOCG) deposits have been critically assessed, including geochronology, geological and tectonothermal evolution, alteration-mineralisation parageneses, and ore geochemistry. A new classification framework is proposed in which IOCG deposits form the major part of a global family of Cu-Au-Fe (± Co, REE) or CGI deposits that also includes Fe-rich Cu-Au deposits lacking significant iron oxides. The CGI family is subdivided on the basis of combined tectonic setting, ore geochemistry, and oxidation state of ore-related mineralogy. Three subtypes of CGI deposits have elevated REE ± U, F and Ba and/or enrichments in Co (± Ni, Bi, Se, Te), with known deposits occurring in Precambrian syn-and post-orogenic settings. A fourth subtype of CGI deposits generally lacks significant enrichments in REE, U, F, Ba, Co, Ni, Bi, Se and Te and occur mainly in Phanerozoic Andean type magmatic arc settings. The REE-and/or Co-rich CGI deposit subtypes are geologically and geochemically distinct from porphyry Cu (-Au), skarn Fe-Cu and iron oxideapatite (IOA) deposits, although there are some shared features. The low-REE-U-Co arc-hosted

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Section: Carajás Province Brazil -Neoarchean Cu-au-fe and Paleoproterozoic Cu-au Depositssupporting

confidence: 59%

Section: Carajás Province Brazil -Neoarchean Cu-au-fe and Paleoproterozoic Cu-au Depositsmentioning

confidence: 98%

Section: Carajás Province Brazil -Neoarchean Cu-au-fe and Paleoproterozoic Cu-au Depositsmentioning

confidence: 99%

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Iron oxide copper-gold (IOCG) deposits – A review (part 1): Settings, mineralogy, ore geochemistry and classification

Skirrow¹

2022

Preprint

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“…The last magmatic event at 2.59-2.53 Ga (G4) is marked by granitoids with exclusively evolved zircon Hf signatures, which suggests yet another reactivation event. This reactivation is corroborated by the partial or total resetting of the U-Pb and Rb-Sr systems and by Ar-Ar cooling ages together with the third pulse of IOCG mineralization at 2.60-2.45 Ga [31,44]. This magmatic event includes also minor high-K alkaline intrusions related to the sinistral reactivation of the northern shear zones of the CMP [28,32,37].…”

Section: Discussionmentioning

confidence: 62%

On the origin of oldest Iron-Oxide-Copper-Gold (IOCG) deposits at the transition from Archean drip to plate tectonics

Ganade

Griffin²,

Weinberg

et al. 2020

Preprint

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Geological evidence supports a significant change in Earth’s behaviour in the mid- to late Archaean, between 3.2 and 2.5 Ga, reflecting stabilization of the lithosphere and replacement of vertical tectonics by linear imbricated belts. At the heart of this change, the oldest (c. 2.75 Ga) Iron-Oxide-Copper-Gold deposits (IOCG) were formed in the Carajás Mineral Province (CMP) of the Amazon craton. U-Pb ages, Lu-Hf isotopes and trace element composition of detrital zircons from modern drainages record the crystallization ages of the exposed rocks of the CMP. Combined with the geochemistry of Archean granitoids in the CMP, we recognize four different age and compositional groups: 3.01-2.92 Ga TTG, 2.87-2.83 Ga transitional TTG + sanukitoid + K-rich granitoids, 2.78-2.72 Ga A-type crustal granites accompanying IOCGs, and 2.59-2.53 Ga alkaline high-K intrusions accompanied by renewed IOCG mineralization. The first two groups have a dominantly juvenile isotopic signature whereas the last two have evolved Hf-isotope signatures, accompanied by increase in K2O/Na2O, reflecting addition of old crustal components in the melting sources over time. The older juvenile granitoids are associated with dome-and-keel structures typical of granite-greenstone terranes, whereas the younger granitoids were emplaced along a linear shear belt associated with new mafic-ultramafic intrusions and remelting of older TTG. Based on the tectono-magmatic evolution, we argue that metasomatism and fertilization of the underlying lithospheric mantle by incompatible elements, necessary for the development of IOCG deposits, were related to vertical drip-tectonics during development of the TTG proto-continent. This proto-continent made the lithosphere rigid enough to allow linear translithospheric deformation to localize at c. 2.85 Ga, allowing decompression melting of the metasomatized lithospheric mantle in a restricted extensional setting to form abundant mafic and A-type granitoids at c. 2.75 Ga, and the first IOCG deposits on Earth.

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“…3; Tavares et al, 2018;Vasquez and Rosa-Costa, 2008). It hosts major ore deposits, including iron oxide-gold-copper deposits (e.g., Grainger et al, 2008;Marschik et al, 2005;Melo et al, 2014;Moreto et al, 2015;Pollard et al, 2019;Requia et al, 2003;Tassinari et al, 2003), Banded Iron Formations (BIFs; Dalstra and Guedes, 2004;Klein and Ladeira, 2002) and Mn ore deposits (Peters et al, 1977). The basement of the Carajás Domain consists of mafic granulites, migmatites and metavolcanic rocks with a protolith age of ca.…”

Section: Regional Contextmentioning

confidence: 99%

Stratigraphy and geochronological constraints of the Serra Sul Formation (Carajás Basin, Amazonian Craton, Brazil)

Rossignol

Rêgo

Narduzzi

et al. 2020

Precambrian Research

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40Ar-39Ar dating of Archean iron oxide Cu-Au and Paleoproterozoic granite-related Cu-Au deposits in the Carajás Mineral Province, Brazil: implications for genetic models

Abstract: Ar-39 Ar dating of biotite from IOCG and granite-related Cu-Au deposits in the Carajás Mineral Province provides evidence for the timing of mineralization and constraints on genetic models of ore formation. Ages of biotite from greisen and quartz-rich vein

Cited by 29 publications

References 56 publications

Iron oxide copper-gold (IOCG) deposits – A review (part 1): Settings, mineralogy, ore geochemistry and classification

Iron oxide copper-gold (IOCG) deposits – A review (part 1): Settings, mineralogy, ore geochemistry and classification

On the origin of oldest Iron-Oxide-Copper-Gold (IOCG) deposits at the transition from Archean drip to plate tectonics

Stratigraphy and geochronological constraints of the Serra Sul Formation (Carajás Basin, Amazonian Craton, Brazil)

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