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Abstract:

This study focuses on the provenance, volcanic record, and tectonic setting of the Paleozoic Ventania System, a geologic province which comprises the Cambro-Devonian Ventania Fold Belt and the adjoining Permo-Carboniferous Claromecó Foreland Basin, located inboard the deformation front. The Ventania Fold Belt is formed of the Curamalal and Ventana groups, which are composed mainly of mature quartzites that were unconformably deposited on igneous and metamorphic basement. The Pillahuincó Group is exposed as part of the Claromecó Basin and it has lithological and structural features totally distinct from the lowermost groups. This group is composed of immature arkoses and subarkoses with intercalated tuff horizons, unconformably overlaying the quartzites and associated with glacial-marine deposits of the lower Late Carboniferous to Early Permian section. The petrography, as well as major and trace elements (including rare earth elements) support that the Ventania quartzites were derived from cratonic sources and deposited in a passive margin environment. For the Pillahuincó Group, we suggest a transition between rocks derived from and deposited in a passive margin environment to those with geochemical and petrographical signatures indicative of an active continental margin provenance. LA-MC-ICP-MS analysis performed on euhedral and prismatic zircon grains of the tuffs revealed an age of 284±15Ma. The geochemical fingerprints and geochronological data of the tuffs found in the Claromecó Basin support the presence of an active and widespread Lower Permian pyroclastic activity in southwestern Gondwana, which is interpreted as part of the Choiyoi Volcanic Province in Argentina and Chile. © 2013 Elsevier Ltd.

Registro:

Documento: Artículo
Título:Provenance, volcanic record, and tectonic setting of the Paleozoic Ventania Fold Belt and the Claromecó Foreland Basin: Implications onsedimentation and volcanism along the southwestern Gondwana margin
Autor:Alessandretti, L.; Philipp, R.P.; Chemale, F.; Brückmann, M.P.; Zvirtes, G.; Matté, V.; Ramos, V.A.
Filiación:Instituto de Geociências, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9500, Porto Alegre 91509-900, RS, Brazil
Instituto de Geociências, Universidade de Brasília, Campus Universitário Darcy Ribeiro, 70910-900, DF, Brazil
Instituto de Estudios Andinos, CONICET, FCEyN, Universidad de Buenos Aires, Argentina
Palabras clave:Claromecó Foreland Basin; Geochemistry; Provenance; Tectonic setting; Ventania fold belt; continental margin; deposition; fold belt; foreland basin; geochemistry; Gondwana; Paleozoic; passive margin; petrography; provenance; quartzite; sedimentation; tectonic setting; trace element; volcanism; Argentina; Chile
Año:2013
Volumen:47
Página de inicio:12
Página de fin:31
DOI: http://dx.doi.org/10.1016/j.jsames.2013.05.006
Título revista:Journal of South American Earth Sciences
Título revista abreviado:J. South Am. Earth Sci.
ISSN:08959811
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08959811_v47_n_p12_Alessandretti

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Citas:

---------- APA ----------
Alessandretti, L., Philipp, R.P., Chemale, F., Brückmann, M.P., Zvirtes, G., Matté, V. & Ramos, V.A. (2013) . Provenance, volcanic record, and tectonic setting of the Paleozoic Ventania Fold Belt and the Claromecó Foreland Basin: Implications onsedimentation and volcanism along the southwestern Gondwana margin. Journal of South American Earth Sciences, 47, 12-31.
http://dx.doi.org/10.1016/j.jsames.2013.05.006
---------- CHICAGO ----------
Alessandretti, L., Philipp, R.P., Chemale, F., Brückmann, M.P., Zvirtes, G., Matté, V., et al. "Provenance, volcanic record, and tectonic setting of the Paleozoic Ventania Fold Belt and the Claromecó Foreland Basin: Implications onsedimentation and volcanism along the southwestern Gondwana margin" . Journal of South American Earth Sciences 47 (2013) : 12-31.
http://dx.doi.org/10.1016/j.jsames.2013.05.006
---------- MLA ----------
Alessandretti, L., Philipp, R.P., Chemale, F., Brückmann, M.P., Zvirtes, G., Matté, V., et al. "Provenance, volcanic record, and tectonic setting of the Paleozoic Ventania Fold Belt and the Claromecó Foreland Basin: Implications onsedimentation and volcanism along the southwestern Gondwana margin" . Journal of South American Earth Sciences, vol. 47, 2013, pp. 12-31.
http://dx.doi.org/10.1016/j.jsames.2013.05.006
---------- VANCOUVER ----------
Alessandretti, L., Philipp, R.P., Chemale, F., Brückmann, M.P., Zvirtes, G., Matté, V., et al. Provenance, volcanic record, and tectonic setting of the Paleozoic Ventania Fold Belt and the Claromecó Foreland Basin: Implications onsedimentation and volcanism along the southwestern Gondwana margin. J. South Am. Earth Sci. 2013;47:12-31.
http://dx.doi.org/10.1016/j.jsames.2013.05.006