RT Journal Article
T1 Tectonic evolution of Ovda Regio: An example of highly deformed continental crust on Venus?
A1 Romeo Briones, Ignacio
A1 Capote del Villar, Ramón
AB A detailed structural analysis of several selected areas of Ovda Regio provides evidence of a complex tectonic evolution. We have reported thrusting in the marginal fold belts indicating together with the presence of short-wavelength folds a significant amount of shortening. Extensional tectonics postdate at least in some locations contraction, while the contrary was not observed. Both contraction and extension occur on a complex layered crust yielding contemporary structures of different wavelengths. The thrust and fold belts of the plateau margins are characterized by concentric contraction followed by concentric contraction with perpendicular extension and finally radial extension. Deformation in the thrust and fold belts of Ovda margins is gradually transmitted to the external plains. A complex tectonic history has been revealed in the internal area of Ovda, basically characterized by contraction in different directions generating basin and dome interference at different wavelengths. Small amounts of a non-coaxial component of deformation have been observed both in the margins and in the central area of the plateau. All the reported observations can be explained if Ovda Regio is a continent that survived a global subduction event.
PB Elsevier
SN 0032-0633
YR 2011
FD 2011-06-13
LK https://hdl.handle.net/20.500.14352/43537
UL https://hdl.handle.net/20.500.14352/43537
LA eng
NO Received 15 / December 2010 / Received in revised form 30 March 2011 / Accepted 17 May 2011 / Available online 13 June 2011.© 2011 Elsevier Ltd. All rights reserved.
DS Docta Complutense
RD 2 may 2024