Estadío inicial del arco volcánico Neógeno en la Cordillera principal de Mendoza (35° S)

Translated title of the contribution: Initial stage of the Neogene volcanic arc in the Cordillera Principal of Mendoza (35°S)

Patricia Sruoga*, Nora A. Rubinstein, Mariela P. Etcheverría, Marcelo Cegarra, Suzanne M. Kay, Brad Singer, James Lee

*Corresponding author for this work

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

This is the first time that an integrated geological approach of the volcanic complex outcroping at Cordón del Burrero and surrounding areas, in Cordillera Principal of Mendoza province (35° S), is carried out. It constitutes a complex volcanic unit, encompassing lavas, dykes and subvolcanic intrusive bodies of basaltic, andesitic and rhyolitic composition. These rocks belong to high-K calc-alkaline series, showing high Ba, Sr, Rb and Cs contents, Nb, Ta and Hf depletion and moderate La/ Yb ratios. The volcanics experienced regional burial and related very low grade metamorphism under zeolite and prehnite-pumpellyite facies conditions. In addition, another yuxtaposed thermal event was locally identified. The volcanic event took place during Middle Miocene times (∼ 18 a 14 Ma) and represents the initial stage of the neogene volcanic arc in Argentina and it may be correlated to the lowest part of Farellones Formation, widespread in Chile at these latitudes.

Original languageSpanish
Pages (from-to)454-469
Number of pages16
JournalRevista de la Asociacion Geologica Argentina
Volume63
Issue number3
Publication statusPublished - Jul 2008

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Keywords

  • Cordillera Principal
  • Mendoza
  • Miocene
  • Volcanism

Cite this

Sruoga, P., Rubinstein, N. A., Etcheverría, M. P., Cegarra, M., Kay, S. M., Singer, B., & Lee, J. (2008). Estadío inicial del arco volcánico Neógeno en la Cordillera principal de Mendoza (35° S). Revista de la Asociacion Geologica Argentina, 63(3), 454-469.