Skip navigation
Skip navigation

The Mesoproterozoic Maz terrane in the Western Sierras Pampeanas, Argentina, equivalent to the Arequipa-Antofalla block of southern Peru? Implications for West Gondwana margin evolution

Casquet, Cesar; Pankhurst, Robert J; Rapela, Carlos W; Galindo, Carmen; Fanning, Christopher; Chiaradia, M.; Baldo, Edgardo; Gonzalez-Casado, Jose M; Dahlquist, Juan A.

Description

The rocks of Sierra de Maz and Sierra del Espinal (Western Sierras Pampeanas) represent pre-Famatinian (Ordovician) basement. Isotope compositions (Nd and Pb) of metasedimentary rocks and SHRIMP U-Pb dating of detrital zircons, combined with other geological evidence, show that three parallel N-S domains can be recognized. The central Maz Domain contains pre-Grenvillian metasedimentary rocks deposited between 1.2 and 1.6 Ga, that underwent Grenvillian granulite facies metamorphism and were...[Show more]

dc.contributor.authorCasquet, Cesar
dc.contributor.authorPankhurst, Robert J
dc.contributor.authorRapela, Carlos W
dc.contributor.authorGalindo, Carmen
dc.contributor.authorFanning, Christopher
dc.contributor.authorChiaradia, M.
dc.contributor.authorBaldo, Edgardo
dc.contributor.authorGonzalez-Casado, Jose M
dc.contributor.authorDahlquist, Juan A.
dc.date.accessioned2015-12-08T22:26:50Z
dc.identifier.issn1342-937X
dc.identifier.urihttp://hdl.handle.net/1885/33803
dc.description.abstractThe rocks of Sierra de Maz and Sierra del Espinal (Western Sierras Pampeanas) represent pre-Famatinian (Ordovician) basement. Isotope compositions (Nd and Pb) of metasedimentary rocks and SHRIMP U-Pb dating of detrital zircons, combined with other geological evidence, show that three parallel N-S domains can be recognized. The central Maz Domain contains pre-Grenvillian metasedimentary rocks deposited between 1.2 and 1.6 Ga, that underwent Grenvillian granulite facies metamorphism and were intruded by mafic igneous rocks and massif-type anorthosites. Metasedimentary rocks have high Nd TDM ages (1.7-2.7 Ga) and very radiogenic Pb (μ = 9.8-10.2), suggesting provenance from reworked early Proterozoic or Archean continental crust. The domains to the east and west of the Maz Domain consist of three metasedimentary sequences with Nd TDM ages between 1.2 and 1.6 Ga and variably radiogenic Pb (μ = 9.6-10.0). U-Pb SHRIMP dating of detrital zircons, Nd TDM model ages and comparison with other data suggest that these sequences are post-Grenvillian, i.e., Neoproterozoic and/or early Paleozoic. The Maz Domain is interpreted as a suspect terrane similar to the northern Arequipa-Antofalla craton that forms the basement of the Central Andes; both underwent Grenville-age orogeny and were probably once continuous along the western margin of Amazonia (West Gondwana).
dc.publisherElsevier
dc.sourceGondwana Research
dc.subjectKeywords: Gondwana; Grenville; Nd isotopes; Pb isotopes; Sierras Pampeanas; U-Pb SHRIMP zircon dating
dc.titleThe Mesoproterozoic Maz terrane in the Western Sierras Pampeanas, Argentina, equivalent to the Arequipa-Antofalla block of southern Peru? Implications for West Gondwana margin evolution
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume13
dc.date.issued2008
local.identifier.absfor040203 - Isotope Geochemistry
local.identifier.absfor040313 - Tectonics
local.identifier.ariespublicationu4027924xPUB106
local.type.statusPublished Version
local.contributor.affiliationCasquet, Cesar, Universidad Complutense de Madrid
local.contributor.affiliationPankhurst, Robert J, British Geological Survey
local.contributor.affiliationRapela, Carlos W, Universidad Nacional de La Plata
local.contributor.affiliationGalindo, Carmen, Universidad Complutense de Madrid
local.contributor.affiliationFanning, Christopher, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationChiaradia, M., Universite de Geneve
local.contributor.affiliationBaldo, Edgardo, Universidad Nacional de Cordoba
local.contributor.affiliationGonzalez-Casado, Jose M, Universidad Autonoma de Madrid
local.contributor.affiliationDahlquist, Juan A., CRILAR-CONICET
local.description.embargo2037-12-31
local.bibliographicCitation.issue2
local.bibliographicCitation.startpage163
local.bibliographicCitation.lastpage175
local.identifier.doi10.1016/j.gr.2007.04.005
dc.date.updated2015-12-08T09:14:56Z
local.identifier.scopusID2-s2.0-38949149972
local.identifier.thomsonID000254238400003
CollectionsANU Research Publications

Download

File Description SizeFormat Image
01_Casquet_The_Mesoproterozoic_Maz_2008.pdf700.57 kBAdobe PDF    Request a copy


Items in Open Research are protected by copyright, with all rights reserved, unless otherwise indicated.

Updated:  19 May 2020/ Responsible Officer:  University Librarian/ Page Contact:  Library Systems & Web Coordinator