Hostname: page-component-586b7cd67f-vdxz6 Total loading time: 0 Render date: 2024-11-27T19:24:29.522Z Has data issue: false hasContentIssue false
  • English
  • Français

Influence of along-strike pre-orogenic sedimentary tapering on the internal architecture of experimental thrust wedges

Published online by Cambridge University Press:  09 June 2003

R. SOTO ,
F. STORTI ,
A. M. CASAS  and
C. FACCENNA
R. SOTO
Affiliation:
Dpto. Ciencias de la Tierra, Universidad de Zaragoza, C/Pedro Cerbuna, 50009 Zaragoza, Spain
F. STORTI
Affiliation:
Dip. di Scienze Geologiche, Università degli Studi ‘Roma Tre’, Largo S. L. Murialdo 1, I-00146 Rome, Italy
A. M. CASAS
Affiliation:
Dpto. Ciencias de la Tierra, Universidad de Zaragoza, C/Pedro Cerbuna, 50009 Zaragoza, Spain
C. FACCENNA
Affiliation:
Dip. di Scienze Geologiche, Università degli Studi ‘Roma Tre’, Largo S. L. Murialdo 1, I-00146 Rome, Italy
Get access Rights & Permissions [Opens in a new window]

Abstract

The occurrence of along-strike thickness variations in pretectonic sedimentary packages is expected to influence the structural architecture of doubly verging thrust wedges. To test this hypothesis, we used laboratory sandbox experiments. Model results show that longitudinal tapering of pretectonic sediments causes a great complexity in the internal tectonic fabric of the wedge, particularly in the pro-wedge, dominated by highly segmented, curvilinear thrusts. The along-strike variation of the mode by which the same amount of bulk contraction is accommodated in different regions of the orogen produces the obliquity of the deformation fronts in both the pro-wedge and the retro-wedge. Comparison with the overall architecture of the Lesser Antilles and Manila accretionary systems validates our experimental results.

Keywords

sandbox modelsaccretionary wedgescompression tectonicsstratigraphic wedgesthrust
Type
Original Article
Information
Geological Magazine , Volume 140 , Issue 3 , May 2003 , pp. 253 - 264
Copyright
© 2003 Cambridge University Press

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)