Evolución geodinámica del basamento paleozoico de los Andes Norpatagónicos

  1. S. Serra-Varela 1
  2. N. Heredia 2
  3. R. Giacosa 1
  4. J. García-Sansegundo 3
  5. P. Farias 3
  1. 1 Universidad Nacional de Río Negro (Argentina)
  2. 2 Instituto Geológico y Minero de España
    info

    Instituto Geológico y Minero de España

    Madrid, España

    ROR https://ror.org/04cadha73

  3. 3 Universidad de Oviedo
    info

    Universidad de Oviedo

    Oviedo, España

    ROR https://ror.org/006gksa02

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Journal:
Geotemas (Madrid)

ISSN: 1576-5172

Year of publication: 2021

Issue Title: X Congreso Geológico de España

Issue: 18

Pages: 1071-1074

Type: Article

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Abstract

The presence of paleozoic metamorphic and igneous rocks is well known along the North Patagonian Andes. Due to the discontinuity of the outcrops and their lithological similarities, metamorphic rocks were grouped under the same litostra- tigraphic unit. Moreover, similar ages were assigned to this rocks based on a correlation of well-known ages in different pla- ces. Posterior studies based on geological and structural mapping and geochronological studies stablished the presence of two orogenic events for the formation of these basement rocks. The oldest one related to a lower Paleozoic event (Famatinian orogeny) and the other one to an upper Paleozoic event (Gondwanan orogeny). So far, the metamorphic rocks that register the lower Paleozoic orogeny are the ones found in San Martín de los Andes area while the other rocks in North Patagonian Andes register the upper Paleozoic orogenic event.

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