Role of basin width variation in tectonic inversion: Insight from analogue modelling and implications for the tectonic inversion of the Abanico Basin, 32°-34°S, Central Andes

P. Jara, J. Likerman, D. Winocur, M. C. Ghiglione, E. O. Cristallini, L. Pinto, R. Charrier

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

We use analogue modelling to investigate the response of compressional deformation superimposed on an extensional basin with along-strike changes in width. Parameters described include extension and shortening distribution and directions, orientation of structures and degree of basin inversion. Two types of model are presented: in the first (Type I), an extensional basin is constructed with variable width (applying differential extension) and subsequently inverted by homogeneous shortening; in the second (Type II), an extensional basin with constant width is subsequently inverted by inhomogeneous shortening (differential compression). From our observations, we compare both types of model to structural patterns observed in some natural cases from the Central Andes. Both models generate oblique structures, but in the Type II model a significant rotation is characteristic. Our results suggest that in the Central Andes region between 32° and 33°S, the Abanico Basin may correspond to a basin of smaller area compared to the larger basin south of 33°S. Our Type I model further explains some patterns observed there, from which we conclude that the control exercised by the width of a pre-existing basin should be considered when interpreting the geological evolution of that area of the Andes.

Original languageEnglish
Pages (from-to)83-107
Number of pages25
JournalGeological Society Special Publication
Volume399
DOIs
Publication statusPublished - 1 Jan 2015

ASJC Scopus subject areas

  • Water Science and Technology
  • Ocean Engineering
  • Geology

Fingerprint

Dive into the research topics of 'Role of basin width variation in tectonic inversion: Insight from analogue modelling and implications for the tectonic inversion of the Abanico Basin, 32°-34°S, Central Andes'. Together they form a unique fingerprint.

Cite this