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dc.contributor.author
Chernicoff, Carlos Jorge
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dc.contributor.author
Zappettini, E. O.
dc.contributor.author
Santos, J. O. S.
dc.contributor.author
Belousova, E.
dc.contributor.author
McNaughton, N. J.
dc.date.available
2023-03-28T12:05:40Z
dc.date.issued
2011-12
dc.identifier.citation
Chernicoff, Carlos Jorge; Zappettini, E. O.; Santos, J. O. S.; Belousova, E.; McNaughton, N. J.; Hf isotope study of Palaeozoic metaigneous rocks of La pampa province and implications for the occurrence of juvenile early Neoproterozoic (Tonian) magmatism in south-central Argentina; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 32; 4; 12-2011; 477-484
dc.identifier.issn
0895-9811
dc.identifier.uri
http://hdl.handle.net/11336/191778
dc.description.abstract
On a global scale, juvenile Tonian (Early Neoproterozoic) magmatic rocks are associated with theextensional events that lead to the breakup of the Rodinia supercontinent. In Argentina, no geological record is available for this time interval, lasting from 1000 to 850 Ma. We present indirect evidence for the existence of Tonian extension in Argentina, as supported by Hf and Nd isotope determinations on Phanerozoic magmatic and sedimentary rocks. We mainly focus on our own Hf isotope determinations carried out on UePb SHRIMP dated zircons from Palaeozoic metaigneous rocks of La Pampa province, south-central Argentina, i.e. metagabbros of Valle Daza, dioritic orthogneiss of Estancia Lote 8, and metadiorite of Estancia El Carancho, having found that these rocks were derived from sources of ca. 920 to ca 880 Ma, with eHf values between þ6.83 and þ 9.59. Inherited zircons of this age and character identified in these rocks also point to the same source. We also compile additional Hf and Nd studies from previous work on Phanerozoic magmatic and sedimentary rocks.We preliminarily compare the age of the juvenile Tonian sources referred to in our work with that of two extensional events identified in the São Francisco craton, Brazil.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Pergamon-Elsevier Science Ltd
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
ARGENTINA
dc.subject
HF ISOTOPES
dc.subject
LA PAMPA
dc.subject
TONIAN (EARLY NEOPROTEROZOIC) EXTENSIONAL MAGMATISM
dc.subject.classification
Geología
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Hf isotope study of Palaeozoic metaigneous rocks of La pampa province and implications for the occurrence of juvenile early Neoproterozoic (Tonian) magmatism in south-central Argentina
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-03-23T12:26:10Z
dc.journal.volume
32
dc.journal.number
4
dc.journal.pagination
477-484
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Chernicoff, Carlos Jorge. Secretaría de Industria y Minería. Servicio Geológico Minero Argentino; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Zappettini, E. O.. Secretaría de Industria y Minería. Servicio Geológico Minero Argentino; Argentina
dc.description.fil
Fil: Santos, J. O. S.. University of Western Australia; Australia
dc.description.fil
Fil: Belousova, E.. Macquarie University; Australia
dc.description.fil
Fil: McNaughton, N. J.. Curtin University of Technology; Australia
dc.journal.title
Journal of South American Earth Sciences
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.jsames.2011.04.005
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