Mesoarchean (3.0 and 2.86 Ga) host rocks of the iron oxide-Cu-Au Bacaba deposit, Carajas Mineral Province: U-Pb geochronology and metallogenetic implications

dc.creatorMoreto, CPN
dc.creatorMonteiro, LVS
dc.creatorXavier, RP
dc.creatorAmaral, WS
dc.creatordos Santos, TJS
dc.creatorJuliani, C
dc.creatorde Souza, CR
dc.date2011
dc.dateOCT
dc.date2014-07-30T13:41:03Z
dc.date2015-11-26T17:28:51Z
dc.date2014-07-30T13:41:03Z
dc.date2015-11-26T17:28:51Z
dc.date.accessioned2018-03-29T00:15:55Z
dc.date.available2018-03-29T00:15:55Z
dc.identifierMineralium Deposita. Springer, v. 46, n. 7, n. 789, n. 811, 2011.
dc.identifier0026-4598
dc.identifierWOS:000296065900007
dc.identifier10.1007/s00126-011-0352-9
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/53613
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/53613
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1285150
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionThe Bacaba iron oxide-copper-gold deposit, situated within a WNW-ESE-striking shear zone in the Carajas Domain, Carajas Mineral Province, is hosted by the Serra Dourada Granite, the Bacaba Tonalite, and crosscutting gabbro intrusions, which were intensely affected by sodic (albite-scapolite), potassic, chloritic, and hydrolytic hydrothermal alteration. This deposit is located 7 km northeast of the world-class Sossego iron oxide-copper-gold deposit and might represent a distal and deeper portion of the same or related hydrothermal system. The U-Pb laser ablation inductively coupled plasma-mass spectrometry data for zircon from a sodically altered sample of the Serra Dourada Granite yielded a 2,860 +/- 22 Ma (MSWD=11.5) age. Three samples from the Bacaba Tonalite, including one with potassic alteration and two with Cu-Au mineralization, rendered the 3,001.2 +/- 3.6 Ma (MSWD=1.8), 2,990.9 +/- 5.8 Ma (MSWD=1.9), and 3,004.6 +/- 9 Ma (MSWD=2.2) ages, respectively. The ca. 2.86 and ca. 3.0 Ga ages are interpreted as the timing of the igneous crystallization of the Serra Dourada Granite and the Bacaba Tonalite, respectively, and represent the oldest magmatic events recognized in the Carajas Domain. The Serra Dourada Granite and the Bacaba Tonalite are interpreted to greatly predate the genesis of the Bacaba deposit. A genetic link is improbable in the light of the similarities with the Sossego deposit, which is also hosted by younger ca. 2.76 Ga metavolcano-sedimentary units of the ItacaiA(0)nas Supergroup. In this context, the iron oxide-copper-gold deposits in the southern sector of the Carajas Domain could be mainly controlled by important crustal discontinuities, such as a regional shear zone, rather than be associated with a particular rock type. These results expand the potential for occurrences of iron oxide-copper-gold deposits within the Mesoarchean basement rocks underlying the Carajas Basin, particularly those crosscut by Neoarchean shear zones.
dc.description46
dc.description7
dc.description789
dc.description811
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionCNPq [555065/2006-5]
dc.descriptionCNPq [303359/2008-0]
dc.descriptionFAPESP [MCT/CNPq/Fapespa 573733/2008-2]
dc.languageen
dc.publisherSpringer
dc.publisherNew York
dc.publisherEUA
dc.relationMineralium Deposita
dc.relationMiner. Depos.
dc.rightsfechado
dc.rightshttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dc.sourceWeb of Science
dc.subjectBacaba deposit
dc.subjectIron oxide-Cu-Au deposits
dc.subjectU-Pb geochronology
dc.subjectAmazonian Craton
dc.subjectCarajas Mineral Province
dc.subjectCopper-gold Deposit
dc.subjectNd Isotope Geochemistry
dc.subjectHydrothermal Alteration
dc.subjectAmazonian Craton
dc.subjectNorthern Brazil
dc.subjectZircon Growth
dc.subjectInternal Structures
dc.subjectMetamict Zircon
dc.subjectRich Scapolite
dc.subjectOre-deposit
dc.titleMesoarchean (3.0 and 2.86 Ga) host rocks of the iron oxide-Cu-Au Bacaba deposit, Carajas Mineral Province: U-Pb geochronology and metallogenetic implications
dc.typeArtículos de revistas


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