Skip to Main content Skip to Navigation
Journal articles

Geomorphologic evidence for Plio-Quaternary shortening in the southern Neuquén basin (40°S, Argentina)

Abstract : A morphostructural analysis of a Pliocene flood basalt formation in the southern Neuquén basin (40°S) shows evidence of contractional deformation less than 3.5Ma ago. This formation exhibits a general dip towards the south-east, with relict outcrops located 100m higher than the main source volcano, which suggests a local tilting of the lava flow. This tilt has been brought about by Plio-Quaternary reactivation of the eastern border of the Sañico Massif along two thrusts that offset the lava flow. Another long-wavelength bulge in the southern part of the lava flow unit indicates a possible Pliocene uplift of the North Patagonian Massif. These results provide new evidence of continuing shortening in the Neuquén basin during the Plio-Quaternary, challenging thehypothesis that an extensional regime has existed since the end of the Miocene in this basin.
Complete list of metadatas

https://hal.archives-ouvertes.fr/hal-01279475
Contributor : Catherine Urrea <>
Submitted on : Friday, February 26, 2016 - 11:46:47 AM
Last modification on : Wednesday, March 4, 2020 - 1:38:20 AM

Links full text

Identifiers

Collections

Citation

Damien Huyghe, Bertrand Nivière, Cédric Bonnel. Geomorphologic evidence for Plio-Quaternary shortening in the southern Neuquén basin (40°S, Argentina) . Terra Nova, Wiley-Blackwell, 2015, 27 (6), pp.426-432. ⟨10.1111/ter.12176⟩. ⟨hal-01279475⟩

Share

Metrics

Record views

183